# Shared Flashcard Set

## Details

Systems week 2
125 and 250 v dc. dg, nf, ventilations
18
Bartending
Pre-School
10/14/2010

Term
 what is ts 3.4.16?
Definition
 The specific activity of the reactor coolant shall be within the following limits: a. Dose Equivalent I-131 specific activity = 1.0 µCi/gm; b. Gross specific activity = 100/E µCi/gm. APPLICABILITY: MODES 1 and 2, />MODE 3 with RCS average temperature (Tavg) = 500°F.
Term
 what is 3.4.1?
Definition
 (DNB) Limits LCO 3.4.1 RCS DNB parameters for pressurizer pressure, RCS averagetemperature (Tavg), and RCS total flow rate shall be within the limits specified below: a. Pressurizer pressure within the limit specified in theCOLR;b. RCS average temperature (Tavg) within the limit specifiedin the COLR; andc. RCS total flow rate ³ 380,900 gpm and within the limitspecified in the COLR.----------------------------NOTE----------------------------Pressurizer pressure limit does not apply during:a. THERMAL POWER ramp > 5% RTP per minute; orb. THERMAL POWER step > 10% RTP.------------------------------------------------------------
Term
 COLR for 3.4.1?
Definition
 COLR for 3.4.1 BOTH UNITS SAME NUMBERS 2.12.1 the pressurzier pressure shall be greater than or equal to 2209psig 2.12.2 the rcs tave shall be less that or equal to 593.1F 2.12.3 the rcs total flow rate shall be greater than 386000gpm.
Term
 what is lco 3.4.2?
Definition
 3.4.2 RCS Minimum Temperature for Criticality LCO 3.4.2 Each RCS loop average temperature (Tavg) shall be ³ 550°F. APPLICABILITY: MODE 1, MODE 2 with keff ³ 1.0. A. Tavg in one or more RCS loops not within limit. A.1 Be in MODE 2 with keff < 1.0. 30 minutes
Term
 WHAT IS THE PURPOSE OF THE 125VDC DISTRIBUTION SYSTEM
Definition
 Supplies 125VDC for each division to supply control power to: Reactor trip switchgearMain Control Board (MCB) ESF sections ESF switchgear control systemsOther safety-related systems requiring DC power
Term
 3.8.1 AC Sources – Operating (Applicable in Modes 1-4)
Definition
 a) 1 qualified circuit inoperable - SR in 1 hour & 8 hours thereafter Restore in 72 hoursb) 1 DG inoperable – SR in 1 hour & 8 hours thereafter Restore in 14 Days c) 2 Qualified circuits inoperable – Restore 1 in 24 hoursd) 1 DG inoperable & 1 or 2 circuits inoperable – Restore circuit(s) or DG in 12 hourse) 2 DGs inoperable – Restore 1 DG in 2 hoursf) Action times not met – Mode 3 in 6 hours, Mode 5 in 36 hoursg) 2 DGs inoperable & 1 or more circuits inoperable – Enter LCO 3.0.3
Term
 3.8.2 AC Sources – Shutdown
Definition
 a) 1 Qualified circuit inoperable Orb) 1 DG inoperable 1) Declare inoperableOr2) Suspend core alterations3) Suspend fuel moves4) No positive reactivity changes5) Restore immediately6) Declare Low Temperature Overpressure Protection (LTOP) inoperable
Term
 3.8.3 Diesel Fuel Oil (Applicable when DG required to be operable)
Definition
 a) 41,138 – 44,000 – restore to greater than 44,000 in 48 hours<41,138 – Declare DG inoperable
Term
 3.8.6 Battery Parameters (Applicable when DC electrical systems are required to be operable)
Definition
 a) Battery Parameter OOS (voltage/Current) – Perform SR in 2 hours, Restore in 24/12 hours.b) Battery Electrolyte low – Restore in 8 hoursc) Battery Temperature low – Restore in 12 hoursd) 2 Battery Parameters OOS - Restore in 2 hourse) Actions not met – Declare inoperable
Term
 3.8.9 Distribution System – Operating (Applicable Modes 1-4)
Definition
 (Applicable Modes 1-4)a) 1 or more subsystem inoperable – Restore in 8 hoursb) 1 or more instrument bus subsystem inoperable – Restore in 2 hoursc) 1 DC subsystem inoperable – Restore in 2 hoursd) Actions not met – Mode 3 in 6 hours, Mode 5 in 36 hourse) 2 power distribution subsystems inoperable – Enter LCO 3.0.3
Term
 WHAT IS K EXCESS, WHAT IS IT THERE FOR, AND HOW DO WE CONTROL IT?
Definition
 1. K excess is extra fuel above and beyond what would make the reactor critical2. It is there to offset the effects over core life of:a. fuel burnupb. MTCc. fuel temp effectsd. void formatione. fission product poison buildup3. Controlled with control rods, boron, and burnable poisons
Term
 3.8.10 Distribution System – Shutdown (Applicable Modes 5-6 or during refueling)
Definition
 a) 1 or more required subsystem (AC, DC or instrument bus) inoperable 1) Declare inoperableOr2) Suspend core alterations3) Suspend fuel moves4) No positive reactivity changes5) Restore immediately6) Declare Low Temperature Overpressure Protection (LTOP) inoperable
Term
 3.8.8 Inverters – Shutdown (Applicable Modes 5-6 and refueling)
Definition
 a) 1 Inverter inoperable 1) Declare inoperableOr2) Suspend core alterations3) Suspend fuel moves4) No positive reactivity changes5) Restore immediately6) Declare Low Temperature Overpressure Protection (LTOP) inoperable
Term
 3.8.7 Inverters – Operating (Applicable Modes 1-4)
Definition
 a) 1 Inverter inoperable – Restore in 7 daysb) Action not met – Mode 3 in 6 hours, Mode 5 in 36 hours
Term
 WHAT IS THE ZIRC-WATER REACTION AND HOW DO WE PREVENT ITS OCCURRENCE?
Definition
 Zr + 2H20 = 2H2 + ZrO2 + HeatZircaloy reaction with water becomes significant at 1800FReaction rate accelerates quickly above 2200FReaction becomes self-sustaining at 2800FOur ECCS design acceptance criteria commits us to keeping the cladding under 2200F at all times.
Term
 WHAT ARE THE TECH. SPECS. FOR THE REACTOR CORE?
Definition
 4.2.1 – 193 fuel assemblies, zircaloy or zirlo clad fuel rods, natural or slightly enriched Uranium Oxide, limited substitutions of zirconium alloy or stainless steel filler rods or vacancies with NRC approval, analyzed fuel design, limited number of lead test assemblies in non-limiting core regions4.2.2 – 53 Control Rod Assemblies, Silver Indium Cadmium, Hafnium, or mixture of both
Term
 WHAT IS THE PURPOSE OF THE NUCLEAR FUEL?
Definition
 1. Generate heat through fission under controlled safe conditions2. Transfer heat to the reactor coolant3. Retain radioactive fission products over a long life cycle
Term
 WHAT FACTORS AFFECT HEAT TRANSFER FROM THE FUEL AND HOW DO THEY CHANGE OVER CORE LIFE?
Definition
 1. Pollution of Helium Gap – from buildup of fission product gasses, increases fuel temp over core life2. Densification of Fuel – increases fuel temp over core life3. Swell of Fuel – decreases fuel temp over core life4. Clad Creep – decreases fuel temp over core life (major change to fuel over core life)5. Corrosion and Crud Buildup – increases fuel temp over core life
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