Term
| What are the possible functions of Rosemount Trip/Calibration Systems? |
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Definition
- Local process indication,
- Remote automatic trip functions actuating
- Alarms, and/or
- Safety systems
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Term
| What amperage and voltage are output signals designed for? |
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Definition
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Term
What parameters does the Reactor Protection System monitor?
Energize or de-energize to trip? |
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Definition
- RPV Pressure
- RPV Level
- Drywell Pressure
De-energize to trip (0 VDC) |
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Term
What does Emergency Core Cooling Monitor?
Energize or de-energize to trip? |
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Definition
- RPV Level (think LOCA)
- Drywell Pressure (think LOCA)
- Condensate Storage Tank Level (think pump suction)
***Energizes to trip (24 VDC)*** |
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Term
What does PCIS/NSSSS monitor?
Energize or de-energize to trip? |
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Definition
Monitors Main Steam Line (MSL) FLOW
***De-energize to trip (0 VDC)*** |
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Term
| Which components are housed in the various slot numbers of card files? |
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Definition
Slots 1-12 = Master & Slave Trip units (any combination)
Slot 13 = Calibration unit (includes readout assembly) |
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Term
| Where are the card files located? |
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Definition
| Auxiliary Equipment Room (AER) - 289 elevation |
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Term
| What does NSSS stand for? |
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Definition
| Nuclear Supply Steam Shutoff System |
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Term
| What are the (5) major components of the Trip/Calibration System? |
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Definition
- Card file
- Master trip unit
- Slave trip unit
- Calibration unit
- Readout assembly
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Term
| Master trip unit functions (3) |
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Definition
- Produces trip output signal (trip setpoint exceeded)
- Provides GROSS FAILURE signal (outside hi/lo limits)
- Provides local process indication (analog meter)
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Term
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Definition
Output goes HIGH when:
- Input signal is less than low setpoint, or
- Input signal is greater than high setpoint
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Term
| How many slave units can a master trip unit drive? |
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Definition
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Term
| Properties of slave trip units |
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Definition
- Cannot receive input directly from transmitter
- Do not generate analog output signals
- Input signal (1 to 5 VDC) from the analog output of the Master Trip Unit
- No analog meter indication (unlike Master Trip Units)
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Term
| Describe the calibration select and command switch |
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Definition
- Two-part rotary push/pull
- Center nob selects the Master Trip Unit
- Center nob activates the calibrate/command current (when depressed)
- Knob rotation is locked when depressed
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