Term
| "STATE the function of the following limitorque valve actuator components: Motor" |
|
Definition
| "Converts electric energy into rotational energy" |
|
|
Term
| "STATE the function of the following limitorque valve actuator components: Declutch lever/Mechanism" |
|
Definition
| "Provides a safe way to manualy opperate the valve via a hand wheel and the clutch allows when motor is energized for the actuator to shift back to automatic" |
|
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Term
| "STATE the function of the following limitorque valve actuator components: Spring" |
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Definition
| "Absorbs the axial force assosiated with redirecting the torque energy in the worm to worm gear" |
|
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Term
| "STATE the function of the following limitorque valve actuator components: Torque Switch" |
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Definition
| "Interupts power to the motor at a preset force against the worm the worm fromt the worm gear(Independant of the limit switch)" |
|
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Term
| "STATE the function of the following limitorque valve actuator components: Limit Switch" |
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Definition
| "Interupts power to the motor and provides indication based on valve travle" |
|
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Term
| "STATE the function of the following limitorque valve actuator components: Stem Nut" |
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Definition
| "Helps to convert torque into thrust" |
|
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Term
| "STATE the function of the following limitorque valve actuator components: Stem Locknut" |
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Definition
| "Thrust on the stem in the close directioin results in an equal thrust in the opposite direction on the stem nut." |
|
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Term
| "DISTINGUISH between a properly and improperly operating motorized valve actuator." |
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Definition
" Placing Actuator in manual.
Depress declutch lever. Should depress easily.
If declutch lever does not fully depress, rotate handwheel slightly to allow lugs to engage.
Should not have to hold down handle.
When handwheel is turned should be little resistance, until lugs engage then, resistance will increase to move valve.
If possible check to see if drivesleeve is turning.
Double verify actual valve position prior to using more than routine force.
PLEASE: Do not use excessive force - this can cause severe valve and or actuator damage.
PLEASE: Do call for assistance if unusual circumstances are encountered.
" |
|
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Term
| "Given a list of operator actions, be able to DISTINGUISH between good and poor operator practices." |
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Definition
" Keep the valve stem clean
Properly lubricate the valve stem
Set up periodic operating schedule if valve is infrequently used
Keep limit switch compartment clean and dry
Check limit switch operation
Check for proper rotation of the motor
Make sure stem nut is secured
Have the valve inspected locally should it not operate as expected (SER 87-035)
Allow enough time for the motor to cool prior to re-energizing after a trip (SER 87-035)
Do Not:
Force declutch lever into motor operation position
Force declutch lever from motor operation position to manual operation
Use declutch lever to stop valve travel during motor operation
Use valve wrench to turn handwheel
“Plug” motor by alternately starting and stopping the motor to open or close a valve too tight for normal operation
Use oversize motor overloads (ISEG 2-87)
Hold the handswitch in the opposite position the valve is stroking
Re-energize an MOV immediately after it has tripped
" |
|
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Term
| "STATE the function of valve packing." |
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Definition
| "Lubricates the stem shaft, Prevents leakage (in-leakage on negative pressure systems and normal leakage on positive pressure systems)" |
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Term
| "STATE the types of valves that Operations personnel may perform packing adjustments on." |
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Definition
" • Non-safety related, non quality related, manual valves (excluding those with live load packing)
• Skill of the craft IAW Conduct of Op’s
• P&ID’s and Master Equipment Database show safety/quality class
" |
|
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Term
| "LIST the methods for determining valve leakage." |
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Definition
"1. Sound of escaping fluid:
a. High energy system leakage will frequently result in detectable abnormal noise >background.
2. Visible fluid leakage
a. Low energy system leakage may be seen as visible liquid seepage/drips from the valve packing gland follower area
b. High temperature liquid system or steam leakage may be seen as visible steam. (Steam not always visible)
3. Condensation on mirror or metal objects
4. Fluid buildup
5. Temperature/humidity increase
" |
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Term
| "STATE the adverse consequences of allowing Valve Packing Leakage to continue uncorrected." |
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Definition
" 1. Loss of fluid inventory
2. Cutting or scoring of valve stems
3. Extensive valve repair or replacement may be necessary. May result in extended plant shutdown.
" |
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Term
| "STATE the precautions and the proper tools associated with Valve Packing Gland Adjustment." |
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Definition
"1. Proper PPE SHALL be used:
a. Face protection shield
b. Gloves/protective clothing
c. Use caution, many gas and steam leaks are invisible. Prevent bodily contact
2. Use only the proper size wrench.
a. Do not use adjustable wrenches
" |
|
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Term
| "IDENTIFY and EXPLAIN Post Packing Gland Adjustment Valve Operation Verification, including Control Room notification." |
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Definition
"1. Operate the valve to ensure freedo of movement
2. Notify the control room of adjustments. " |
|
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Term
| "LIST the four most common problems which may develop during Valve Packing Gland Adjustment." |
|
Definition
" 1. Yoke cocking
2. Difficult or unable to operate the valve
3. Gland Bolt failure/breakage
4. Gland Bolt Thread Galling
" |
|
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Term
| "STATE the steps/methods of adjusting the packing. |
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Definition
| "•Tighten gland bolts evenly, alternating sides to prevent cocking " |
|
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Term
| "STATE the reason for keeping everyone informed of ongoing activities" |
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Definition
"• Inadequate communications identified as factor in 15% of all Human Performance Errors. Of these 2/3 of the problems involve verbal communications.
" |
|
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Term
| "IDENTIFY and STATE substitutes for words (slang terms and words that sound alike) that should not be used in verbal communication" |
|
Definition
" Avoid terms that could be misinterpreted such as:
Increase - Decrease
Instead use terms such as:
Raise - Lower
Open - Shut for valves
Open - Close for breakers" |
|
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Term
| "DEMONSTRATE the use of ""REPEAT BACK"" messages." |
|
Definition
"Four Parts
Originating individual’s name or work station,
Acknowledging individual’s name or work station,
Paraphrase or explanation of instructions in your own words,
Confirmation of the acknowledgement from the originating individual." |
|
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Term
| "STATE the reason for using equipment noun names and numbers when giving verbal operating instructions." |
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Definition
| "• To avoid confusion and ensure the proper action is performed" |
|
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Term
| "LIST conditions under which written instructions should be given" |
|
Definition
"• Ensure information is not forgotten
• Formal written guidance is not available " |
|
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Term
| "DESCRIBE the proper technique for answering a telephone." |
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Definition
| " • When answering a phone or radio you should identify your location or watch-station, followed by your name or title" |
|
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Term
| "STATE the reason for using the phonetic alphabet when communicating alphanumeric information" |
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Definition
| "• Minimize misinterpretation " |
|
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Term
| "LIST the types of communication which must be formal." |
|
Definition
"telephone
radios
face to face " |
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Term
| "STATE when formal communication must be used " |
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Definition
"All communications related to the operation of plant
equipment should be formal including:
" |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
| "EXPLAIN the proper method for determining or verifying the position of a valve." |
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Definition
" 1. Compare to identical valve nearby
2. Consider valve size to estimate expected stem travel
3. Rising stem
4. Grease marks on valve stem
5. Yoke wear marks
6. Valve position tags
7. Limit switches
8. Other mechanical indicator which moves with valve stem
" |
|
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Term
|
Definition
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Term
|
Definition
" An output will be present when any input is present" |
|
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Term
|
Definition
"An output will be present when no input is present" |
|
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Term
|
Definition
"a. An output will be present when at least “A” number of total inputs “B” are present" |
|
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Term
|
Definition
E. TIME DELAY Logic a. TDPU-Time Delay On Pickup i. When an input is present the output will be present after a time delay. When the input is removed the output will be instantaneously removed b. TDDO- Time Delay On Dropout i. When an input is present the output will be present. When the input is removed the output will be removed after a time delay c. ON i. When an input is present the output will be present after a time delay. When the input is removed, the output will be instantly removed d. OFF i. When an input is present the output will be present. When the input is removed the output will be removed after a time delay" |
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Term
|
Definition
" F. MEMORY Logic a. When the “S” (store) input is present the output will be present and will remain present after the “S” input is removed. When the “R” (reset) input is present the output will be removed unless the “S”" |
|
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Term
| "Memory logic with actuation block" |
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Definition
"G. MEMORY Logic With Actuation Block a. When the “L” (Actuation) input is present the output will be present and will remain after the “L” input is removed. When the “R” input is present, the output will be removed even if the “L” input is still present. The “R” input blocks the presence of the Actuation Signal. " |
|
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Term
| "IDENTIFY the four step approach to Electrical Troubleshooting." |
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Definition
| "1. Identification 2. Verification 3. Prioritization 4. Implementation " |
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Term
| "STATE the location where to obtain the current system drawing." |
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Definition
| " Control Room and File Net" |
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Term
| "STATE the functions of the Off-Site Electrical Distribution System." |
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Definition
" 1. Provide reliable power source for plant auxiliary power systems.
2. Provide reliable distribution of the generated power from both units." |
|
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Term
|
Definition
"a. Provide reliable power source for plant auxiliary power systems.
b. Provide reliable distribution of the generated power from both units.
c. Provide offsite power to the site
d. 2 buses in switchyard-
i. North Bus
ii. South Bus " |
|
|
Term
| """Breaker and a Half"" Scheme" |
|
Definition
" a. Offers flexibility and reliability with fewest number of breakers.
b. Provides reliability and flexibility
c. Consists of 3 Power Circuit Breakers (PCBs) located between North and South bus with a transmission line connected between the first and the second, and the second and the third breaker.
d. Disconnect switches are provided on each side of each PCB
e. Breakers located between offsite lines, and offsite lines north and south bus." |
|
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Term
| "Circuit Breakers (PCBS)" |
|
Definition
" a. Provide high voltage and current protection and control
b. Located in switchyard
" |
|
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Term
|
Definition
"a. Used for surge suppression and reactive loading (artificial load) for voltage control.
b. Connected to the bus by a 2,000 amp circuit switcher.
c. One for each (North and South) bus. " |
|
|
Term
|
Definition
"a. Supply Unit Standby Buses
b. Shared between units
i. ST#1 fed from the North Bus
ii. ST#2 fed from the South Bus
c. Ratings
i. 345KV/13.8KV
ii. Cooling forced oil/air
iii. Can simultaneously supply both plants ESF Buses and 2 Aux Buses
d. Located Northeast corner by Turbine Building " |
|
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Term
|
Definition
| "Allows for control of electricity and allows for safe matinance of the swtichyard components " |
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Term
|
Definition
" a. Provides backup power to ESF buses (via motor operated disconnect switches and emergency outdoor bus 1K)
b. Has separate 138 KV transmission line.
c. Can simultaneously supply one ESF bus in each Unit.
d. LOCATION - On East side of switchyard inside fenced perimeter" |
|
|
Term
|
Definition
" a. FUNCTION - To house low side isolation breakers for the Emergency Transformer
b. LOCATION - In the Switchyard" |
|
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Term
|
Definition
"a. FUNCTION - To step up generator output to yard voltage when plant is supplying power to the grid (system) or to step down yard voltage to the Unit Auxiliary Transformer for plant auxiliary power when the main generator is off the line.
b. LOCATION - North West corner of Turbine Building.
c. Steps up 25 KV generator output to 345 KV for line transmission.
i. Consists of TWO 3 phase transformers
ii. Fire Wall separates the two transformers
iii. Isolated Phase Bus to each Main Transformer rated at 32,000 amps if forced air cooled , 18,500 if self cooled.
iv. Loading when a single transformer is in service should not exceed the 100% load rating of that transformer.
d. Manual Disconnects for maintenance - Located on tower North of Main Transformers.
e. Oil Coolers - Located on 3 sides of transformer
i. Each Transformer has two sets of oil coolers each consisting of:
1. Three Heat Exchangers and Three Pumps
2. Four fans on each heat exchanger
3. Fans and pumps start at 80 0C
f. Expansion Tanks (2) - Located on North and South Side
i. Rubber bladder vented to atmosphere
ii. Allows for level changes in the tank while maintaining isolation from the environment
iii. Prevents oxygen and moisture intrusion into XFMR oil
1. Contaminates reduce insulating characteristics of the oil and could result in arcing = fire or explosion " |
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Term
| "125 VDC Switchyard System" |
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Definition
"a. Dual power supplies from 2 independent 125 VDC systems for PCB control and protection.
b. Each Supply has a separate battery and battery charger located in the Switchyard House.
i. Each charger receives power from the Switchyard 480 V LC 12-H
ii. LC 12-H powered from 4.16 KV bus 1D and 2D via transformers located in the SWYD, or from an emergency diesel generator located outside North East side of the Switch House.
1. Manually started and manually loaded. " |
|
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Term
|
Definition
"LC 12-H powered from 4.16 KV bus 1D and 2D via transformers located in the SWYD, or from an emergency diesel generator located outside North East side of the Switch House.
" |
|
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Term
| "Unit Auxiliary Transformer" |
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Definition
" a. To supply the 13.8 KV Auxiliary Buses from either generator output or backfeed from the Main Transformers.
b. LOCATION - North West corner of Turbine Building behind fire wall toward TGB next to Main Transformer.
c. Supplied from isolated bus duct between Main Transformers (MT’s) and generator circuit breaker.
d. Ratings
i. 25 KV / 13.8 KV
ii. Cooling forced oil/air
iii. Can simultaneously supply all Aux. Buses and STBY Buses in a single unit." |
|
|
Term
| "Switchyard Diesel Generator" |
|
Definition
" Located in the switchyard
emergency diesel generator located outside North East side of the Switch House.
Manually started and manually loaded." |
|
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Term
| "Unit Auxiliary Transformer" |
|
Definition
" " a. Liquid Oil Temperature - Located North side below tank liquid level indicator
i. Normal 40 - 80 0C
ii. Maximum < 90 0C
b. Winding Temperature - Located North side below tank liquid level indicator
i. Normal 50 - 80 0C
ii. Maximum < 120 0C
c. Tank Liquid Oil Level - Located North side of transformer near top
i. Normal “Hi” - “Lo” with a normal “25 0C” graduation
ii. Minimum oil level - at “LO” mark
d. N2 Pressure on Transformer - Located in cabinet on North East corner
i. Regulator set to maintain between 0.5 and 4.0 psig
ii. Minimum N2 pressure = 0.5 psig
iii. Maximum N2 pressure = 4.0 psig
e. N2 Pressure in Bottle - Located in cabinet on North East corner
i. Minimum > 200 psig
f. Rapid Pressure Relay - Located on top of transformer (North side) above temperature gauges
i. Alarms in the Control Room and locally at the Control Panel.
ii. Alarm is reset locally in the Control Panel Cabinet.
g. Load Tap Changer Oil Level Gauge - Located on South side of Load Tap Changer
i. Scale “Hi” - “Lo” with a normal “25 0C” graduation
h. Combined Combustible Gas Monitor - Located on East side, South of Nitrogen bottle cabinet.
i. Measures % Hydrogen Gas (fault generates hydrogen gas]
ii. Normal reading is 0 - < 1%
i. Local Alarm Panel - Located on West side of transformer below Load Tap Changer.
i. Contains alarms for UAT and UAT Load Tap Changer.
ii. Contains indications and controls for LTC.
iii. Contains indications and controls for transformer cooling system.
j. Oil Pump and Fan Control Circuitry
i. 3 oil pumps and fans
ii. 3 switch temperature indicator controls circuitry by measuring winding temperature.
iii. Low switch set at 70 0C (increasing)
1. Starts fan and pump on increasing temperature if control switch is in auto.
iv. High switch set at 117 0C (increasing) = Alarm "" |
|
|
Term
|
Definition
"2. Standby Transformer
a. Liquid Temperature- Located West Side of Transformer
i. Normal 40-50C
ii. Max<=90C
b. Winding Temperature- Located West Side of Transformer
i. Normal 40-50C
ii. Max <=117C
c. Tank Liquid Level- Located west of Transformer near the top
i. Normal “Hi” - “Lo” with a normal “25 0C” graduation
ii. Minimum oil level - at “LO” mark
d. N2 Pressure on Transformer - Located in cabinet on South East corner
i. Regulator set to maintain between 0.5 and 4.0 psig
ii. Minimum N2 pressure = 0.5 psig
iii. Maximum N2 pressure = 4.0 psig
e. N2 Pressure in Bottle – Located in cabinet on South East corner
i. Minimum > 200 psig
f. Sudden Pressure Relay - Located on upper South West Corner of transformer
i. Alarms in the Control Room.
g. Pressure Relief - Mounted on top South West corner
i. Relief valve has yellow flag that is raised to the vertical position if the valve has actuated.
h. Pump “ON / OFF” indication - Located on the discharge of each pump
i. Oil Pump and Fan Control Circuitry
i. 3 switch temperature indicator controls circuitry by measuring winding temperature
1. Low switch set at 70 0C (increasing)
a. Starts fan on increasing temperature
b. Stops fan on decreasing temperature
2. Middle switch set at 75 0C (increasing)
a. Starts oil pump if switch is in AUTO
i. 2 Oil pumps 6 HP each
3. High switch set at 117 0C (increasing) = Alarm " |
|
|
Term
|
Definition
""a. Sudden Pressure Relay
i. Unit 2 and MT-001B located above temperature gauges on North Side of transformer (near top)
ii. MT-001A located on North side closest to TGB near top.
1. Alarms in Control Room and locally. Reset locally in Control Cabinet
b. Top Oil Temperature Gauge - Located on North side near lower left corner of cooling radiator
i. Maximum < 90 0C
c. Winding Hot Spot Temperature Gauge - Located on North side near lower left corner of cooling radiator
i. Maximum < 115 0C
d. Oil Level Gauges - Located on each Expansion Tank
i. Scale “Too Hi” - “Too Lo” with a normal “25 0C” graduation
e. Pump “On/Off” gauge - Located on discharge of each pump
i. Indicates if respective pump is running
f. Combined Combustible Gas Monitor Gauge - Located on top South West side
g. Pressure Reliefs
i. 3 Relief valves on each transformer (except MT-001A)
1. MT-001A has 1 relief Located on North East Corner
h. Incipient Fault Monitor
i. Arcing generates hydrogen gas. The monitor measures the concentration of Hydrogen in the transformer.
i. Nitrogen overpressure used to prevent oxygen and moisture intrusion into transformer oil.
i. Contaminates reduce the insulating characteristics of oil and could result in arcing between phase windings or within a single phase winding.
ii. Oxygen and oil vapor buildup in the presence of arcing could lead to explosion and/or fires. "" |
|
|
Term
|
Definition
" a. Liquid Temperature and Level - Located on East side of Transformer
b. Winding Temperature - (3) Located East side of Transformer
c. Pressure Relief - Top South East corner
d. Pump “On” “Off” indication
e. Fault Pressure Relay - Above South West Pump
f. Nitrogen Pressure" |
|
|
Term
| "EXPLAIN the function of nitrogen overpressure on transformers." |
|
Definition
"1.4.1 Nitrogen overpressure used to prevent oxygen and moisture intrusion into transformer oil.
A. An N2 bottle is normally located at the transformer to supply nitrogen.
B. Contaminates reduce the insulating characteristics of the oil and could result in arcing between phase windings or within a single phase winding.
C. Oxygen and oil vapor buildup in the presence of arcing could lead to explosions and/or fires. " |
|
|
Term
| "LIST the PCB's which can be controlled from the Main Control Room." |
|
Definition
"Unit 2-Y590 & 600
Unit 1-Y510 & 520" |
|
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Term
| "STATE the voltages of the power supplies for the following: Battery Chargers" |
|
Definition
|
|
Term
| "STATE the voltages of the power supplies for the following: Control Power for Yard Circuit Breakers (PCBS)" |
|
Definition
|
|
Term
| "STATE the voltages of the power supplies for the following: Control Power for Main, Standby, and Auxiliary Transformer Auxiliary Equipmen" |
|
Definition
" a. Main Transformer
i. High Side - SWYD 125 VDC
ii. Low Side - Non-Class 1E 125 VDC (Train A) for relay and Aux. Bus Feeder breakers control power.
iii. TGB 250 VDC for Main Generator Circuit Breaker Control Power.
iv. Cooling power supplied from:
1. “A” XFMR
a. Normal - LC 1R
b. Alternate - LC 1G1
2. “B” XFMR
a. Normal - LC 1T
b. Alternate - LC 1G2
b. Standby Transformer
1. Low Side - Non-Class 1E 125 VDC (Train A)
2. High Side - SWYD 125 VDC
ii. Cooling power supplied from:
1. Unit 1
a. Normal - MCC 12M1
b. Alternate - MCC 12M2
2. Unit 2
a. Normal - MCC 12M2
b. Alternate - MCC 12M1
c. Unit Auxiliary Transformer
i. Control and Protection:
1. High Side - Non-Class 1E 125 VDC (Train A) for relay to SWYD 125 VDC (PCB’s) and to TGB 250 VDC (Gen. Ckt. Bkr.)
2. Low Side - Non-Class 1E 125 VDC (Train A) for relaying and feeder breakers to Aux. Buses.
ii. Cooling power supplied from:
1. Normal - MCC 1F5
2. Alternate - MCC 1G3" |
|
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Term
| STATE the basis for verifying that the supply breakers outdoor 1K and 2K buses are open prior to closing the 138 KV Emergency Transformer Disconnect. |
|
Definition
| Prevent Damage to XFMR by energizing loaded bus |
|
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Term
| STATE the indications available to DETERMINE that the Emergency Transformer High Speed Ground Switch is open. |
|
Definition
|
|
Term
| "IDENTIFY conditions which indicate the necessity for valve repacking by Maintenance, and STATE the method/procedure for initiating the required working manually operated Valve Packing Glands." |
|
Definition
"1. Notify the control room and initiate a CR to repack the valve if the following exists
a. No thread remaining for adjustment of gland bolts
b. Gland bolts will no longer turn with moderate torque and leakage continues" |
|
|
Term
Know how to draw and lable Offsite Electrical Distribution
|
|
Definition
|
|
Term
Theory of Transformer Operation
|
|
Definition
|
|
Term
| Theory of Circuit Breaker Operation (Basic) |
|
Definition
|
|
Term
| Theory of Transformer Auxiliary Equipment |
|
Definition
|
|
Term
| LIST the five functions of the Condensate Storage and Transfer System. |
|
Definition
• Provide makeup water to the condenser hotwells.
• Receive reject water from the Condensate System.
• Provide regeneration water for the Condensate Polishing Demineralizer System.
• Transfer water from condenser hotwells to the auxiliary feedwater storage tank when the Demineralized Water transfer system is not available.
• Provide an alternate means of supplying injection water to the condensate pump seals via a normally closed manual valve. |
|
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Term
|
Definition
• The SMUT receives and stores the rejected condensate from the Condensate System when condenser hotwell level is high.
• Located adjacent to the northeast corner of the Turbine-Generator Building. |
|
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Term
|
Definition
• The Condenser Makeup Pumps take suction on the SMUT and provide makeup water to the condenser hotwell when its level is lower than normal.
• Located West of the SMUT |
|
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Term
|
Definition
• The dump pump can be used to transfer condensate from the hotwells to the AFWST, SMUT, or recirculate the condensers when there is no vacuum in the condenser.
• Located on the South Wall, East side of the condenser pit on the 20' elevation. |
|
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Term
|
Definition
• Condensate Makeup Valve (CD-LV-7005) functions to provide makeup to the Hotwells as demanded by LC-7005. The valve is air operated and fails closed on loss of air.
• It is located in the condenser pit between condensers 12 & 13 just above the floor. |
|
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Term
|
Definition
• Condensate Reject Valve (CD-LV-7006) taps off of the condensate header just downstream of the Gland Seal Condenser. The Condensate header pressure (600 psig) provides the motive force for rejecting water from the system.
• LV-7006 is located in the TGB on the 29' elevation at the South end of Condenser 13 by the stairway. |
|
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Term
| Describe the function of the Secondary Makeup Tank Floating Diaphragm |
|
Definition
| • To exclude / minimize dissolved oxygen |
|
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Term
| DISCUSS the controls for the Condenser Makeup Pumps |
|
Definition
• The two Condenser Makeup Pumps located west of the SMUT. They are horizontal centrifugal pumps, each rated for 50% of system design flow. The capacity of each pump is 1000 gpm at a back pressure of 43.3 psig. The required net positive suction head of each pump is 7 feet of water at design flow. The pump drivers are 40 hp, 1800 rpm electric motors manufactured by Siemens-Allis. They are each powered by 480 volt/3 phase/60 Hz. Pump 11(21) is supplied from MCC 1(2)F2 Cub. H1, while Pump 12(22) is supplied from MCC 1(2)F3 Cub. F1.
• Each pump has a local and a remote control switch. The local switch is at the pump while the remote switch is on CP-008. Functions of the switches are identical except the remote switch has a Pull-To-Lock (PTL) position. The local switch is 3-position (STOP/AUTO/START) spring return to AUTO. The remote switch is a 4-position (PTL/STOP/AUTO/START) spring return to AUTO from STOP or START. Above each switch is a RED (running) and GREEN (stopped) status light. The functions of the switch positions are as follows:
o PULL-TO-LOCK - the pump cannot be started from the local control switch.
o STOP - will stop the pump.
o AUTO - allows the non-running pump to automatically start on low discharge header pressure provided the start conditions are satisfied.
o START - will start the condenser makeup pumps if:
The other switch is not in the "STOP" position, and
The remote switch is not in the "PULL-TO-LOCK" position, and
The secondary makeup tank is above the LO-LO level cutout.
• Each pump has a discharge pressure indicator (PI-7741/PI-7742) located in ZLP-829 (west of pumps). Two instruments are located on the common discharge header of the pumps: PSL-7743 & PT-7744. The pressure switch provides a signal to start the non-running Condenser Makeup Pump on a low discharge header pressure of 45 psig. When header pressure recovers, the pump must be manually secured. PT 7744 provides an input to ICS. |
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Term
| Discuss the controls for the Hotwell Dump Pump |
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Definition
• The Hotwell Dump Pump is part of the Condensate System but is included in this lesson. It is located on the South wall, East side of the condenser pit (20'). The Hotwell Dump Pump is a centrifugal pump manufactured by Goulds, Inc. The pump is rated at 400 gallons per minute at a total head pressure of 72.8 psia. The required net positive suction head is 7 feet of water. The pump is driven by a Siemens-Allis, 40 HP, electric motor. The motor operates at 1800 rpm and is supplied 480 volt/3 phase/60 Hz source from MCC 1(2)F1 Cub. H1. The dump pump can be used to transfer condensate from the hotwells to the AFWST, SMUT, or recirculate the condensers when there is no vacuum in the condenser.
• The pump is controlled by a local handswitch (HS-7000) mounted above the pump on the TGB +29 elevation. It is a 2¬- position (STOP/START) maintained contact switch. In addition, there are local RED (running) and GREEN (stopped) status indicating lights. There are no interlocks associated with the pump. Pump discharge pressure indicator (PI-7000) is by the pump. |
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Term
| LIST the power supplies for the Hotwell Dump Pump and the Condenser Makeup Pumps. |
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Definition
• Hotwell Dump Pump
o MCC 1(2)F1 Cub. H1
• Condenser Makeup Pumps
o Pump 11(21) is supplied from MCC 1(2)F2 Cub. H1
o Pump 12(22) is supplied from MCC 1(2)F3 Cub. F1 |
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Term
| DESCRIBE how the Condensate Storage and Transfer System interfaces with the following plant systems: |
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Definition
Demineralized Water
• Used to fill SMUT
Process Sampling
• Used to check chemistry values
Instrument/Service Air
• For instrument and motive air for LIC-7736 & LV-7736
Storm Drain System
• Provides drainage for the condensate system
Condensate Polishing Demineralizer System
• Condensate provides regeneration water
Auxiliary Feedwater Storage Tank
• Condensate provides water from the hotwell whenever demineralized water transfer system is not available.
Condensate System
• Makes up to and receives condensate reject water.
Chemical Injection
• Provides for pH & O2 control |
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Term
| EXPLAIN the effect a loss of the Condensate Storage and Transfer System or its components has on plant safe shutdown capability. |
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Definition
• The Condensate Storage and Transfer system is not safety-related and has no safety design bases. Failure of this system will not compromise operation of safety-related systems or prevent safe shutdown of the reactor.
• It will have no impact on safe shutdown capabilities.
• However, the AFWST Level indicators carry "CT" system designators. The CS&T system is listed in the UFSAR and the FHAR as providing essential monitoring indicators. |
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Term
| DEFINE the following terms as related to electrical equipment and systems: Clearance |
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Definition
| Clearance- Permission given in writing by the issueing authority, to control and mechanical and electrical system or component |
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Term
| DEFINE the following terms as related to electrical equipment and systems: Live/Alive/Hot |
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Definition
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Term
| DEFINE the following terms as related to electrical equipment and systems:De-energized |
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Definition
| De-energized is to be disconnected from all sources of electricity |
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Term
| DEFINE the following terms as related to electrical equipment and systems:Dead |
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Definition
| De-energized and properly grounded |
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Term
| DEFINE the following terms as related to electrical equipment and systems:Ground |
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Definition
| A conducting connection between an electric conducto or equipment and the earth, ot to some conducting medium which serves in place of earth. |
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Term
| DEFINE the following terms as related to electrical equipment and systems: Line |
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Definition
| A metallic conducting material in the form of a wire or cable |
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Term
| DEFINE the following terms as related to electrical equipment and systems:Circuit |
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Definition
| A combination of lines and exposed live parts of conductors, equipment,m appereatus, etc. |
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Term
| IDENTIFY the effects for: 1-20 ma, 20-100ma, 100-200ma |
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Definition
1-20:Mild sensation
20-100: Painful Shock, severe muscular contractions, breathing difficulties
100-200 ma Ventricular fibrillation, death almost immediately |
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Term
| LIST four safety rules pertaining to electrically powered tools. |
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Definition
A.Only authorized personnel shall attend to the batteries and battery rooms
B.No smoking shall be allowed in or near battery rooms at any time.
C.Adequate ventilation shall be provided and used when charging batteries.
D.Rubber gloves, apron, and eye protection shall be worn at all times while working around the batteries |
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Term
| LIST four electrical safety rules associated with batteries and battery rooms. |
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Definition
A. Only authorized personnel shall attend to the batteries and battery rooms
B. No smoking shall be allowed in or near battery rooms at any time.
C. Adequate ventilation shall be provided and used when charging batteries.
D. Rubber gloves, apron, and eye protection shall be worn at all times while working around the batteries |
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Term
| LIST four conditions under which rubber gloves must be worn while working on or near electrical circuits or equipment. |
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Definition
A. Coming within falling or reaching distance of unprotected energized circuits or those which may become energized.
B. Working within three feet of an energized conductor or apparatus.
C. During rainy or stormy weather when working on or near any apparatus which may become energized at any voltage.
D. Working of any circuit or apparatus which may be subject induced voltages |
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Term
| DEFINE "protective grounding" in reference to electrical systems/equipment. |
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Definition
| The application of grounding devices for the safety of personnel working on de-energized equipment or apparatus. |
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Term
| DESCRIBE basic safety precautions to be taken when working with energized electrical equipment. |
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Definition
A. Always wear the required safety equipment applicable to the work being performed and suitable for the area
B. Use STAR. Stop Think Act Review
C. Ensure that work is being performed on the correct unit and the correct equipment. If in doubt, then verify or ask cognizant supervisor to verify.
D. Each individual is responsible for their own safety
E. Each individual is responsible for determining the precautions necessary to establish a level of comfort for job performance.
F. Use only company approved protective equipment. Additional equipment shall be approved through the Personal Safety Group |
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Term
| DEFINE "Properly Closed" in regard to plant electrical and electronic enclosures. |
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Definition
| 1. Latches, bolts, screws or whatever devices designed to ensure closure are secure |
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Term
| STATE three (3) reasons why plant equipment enclosures must be securely closed and latched. |
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Definition
1. Ensure equipment can perform as designed under seismic and harsh environmental conditions.
2. To guard against injury to personnel
3. To keep equipment inside enclosure free of debris so that it will function properly |
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Term
| STATE the function of the AC Electrical System and Major Components. |
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Definition
1. To provide reliable and adequate:
a. Normal power to the class 1E 4160VAC Buses from13.8KV Stby Buses
b. Normal power to the Non-Class 1E 13.8KV, 4160VAC and 480VAC Loads
c. Backup Power to the Class 1E 4160VAC Buses from the Site Emergency Transformer |
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Term
STATE the location of the following AC Electrical System Major Components:A. Main, Auxiliary, Standby, and 4.16 BOP Transformers
B. 13.8 KV Auxiliary and Standby Buses
C. 4.16 KV Bus 1D |
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Definition
1. Main
a. NW of TGB closest to access road
2. Aux
a. NW of TGB between Main XFMR and TGB
3. Standby
a. NE of TGB
4. 4160 BOP
a. SE of TGB
5. 13.8KV Standby Bus
a. North End TGB 31 ft
b. Aux Bus is West of Standby |
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Term
| IDENTIFY typical 13.8 KV Aux Bus loads. |
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Definition
1. RCP’s (4)
2. Condensate Pumps (3)
3. FeedWater Booster Pumps (3)
4. Circ Water Pumps (4)
5. 4160VAC Load Centers (1D1 & 1D2)
6. 480VAC Load Center
7. Standby Bus through Tie Breaker |
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Term
| IDENTIFY typical 4.16 KV Bus loads. |
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Definition
1. 480VAC Load Centers
a. 1H (MAB HVAC)
b. 12H (SwitchYard)
2. Low Pressure Heater Drip Pumps
3. RCB Chillers
4. MAB Chillers
5. Open Loop Aux Cooling Water Pumps
6. Boron Thermal Regeneration System Chillers |
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Term
| IDENTIFY Major components, System Interfaces, Controls and Instrumentation, and Interlocks by drawing and labeling a one line diagram of the Electrical Distribution System. Show lineups for normal and emergency operations. |
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Definition
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Term
| STATE where all Major Circuit Breakers can be operated from. |
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Definition
1. 13.8 KV and 4.16 KV Breakers and the ESF MODs are remotely controlled from the Control Room CP-010.
2. 13.8 KV Breakers can be tripped locally on the breaker front. 4.16 KV Breakers can be closed and tripped locally on the breaker front.
3. 13.8 KV and 4.16 KV Breakers can be operated with the switch located on the cubicle door face if the breaker is racked in to the test position only. |
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Term
| STATE the reason that breaker closing springs should automatically discharge just before reaching the fully racked out position. |
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Definition
| 4.8 The Closing Springs will discharge as the breaker is racked out just before reaching the fully racked out position to prevent personnel injury during work on the breaker |
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Term
| DISCUSS the operation of the closing springs. |
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Definition
| • The tripping springs are smaller than the closing springs and are charged by the closing springs as the breaker closes. |
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Term
| DESCRIBE how to identify whether the Control Power Fuse Block is inserted in the "OFF" or "ON" position. |
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Definition
• The indication is on the top left corner of the fuse block when installed
• The tab on the fuse block may also cover the word off or on leaving the indicated position uncovered |
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Term
| DESCRIBE the purpose and operation of the Rackout Interlock. |
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Definition
5.5.1 Prevents arc over and subsequent injury to personnel and damage to equipment.
5.5.2 Trips breaker open upon detection of rackout movement. |
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Term
| STATE the purpose of a synchronizing Interlock. |
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Definition
| • To prevent paralleling 2 sources out of phase |
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Term
| DESCRIBE 13.8/4.16 KV transformer temperature control and indication. |
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Definition
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Term
| STATE what indicating lights mean in the breaker cabinet in relation to 125 VDC Control Power. |
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Definition
| If the lights are on then there is Control power. |
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