Term
RPV Inst
Describe reference leg indications for failures. |
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Definition
-Break: Level fails high.
-Prassure fails: fails low. |
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Term
RPV Inst
Describe variable leg indications for failures. |
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Definition
-Break: fails low.
-Pressure: remains unaffected. |
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Term
RPV Inst
Describe the reference leg location. |
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Definition
| -Outside drywell in Rx building. |
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Term
RPV Inst
Describe the hot calibrated instruments and indicated levels. |
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Definition
-Safeguards: -50" to +50".
-Feedwater: 0 to +60".
-Core flood: -335" to +65". |
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Term
RPV Inst
Describe the cold calibrated instruments and indicated levels. |
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Definition
| Vessel flood: -50" to +350". |
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Term
RPV Inst
Describe the backfill flow indicator power supply. |
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Definition
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Term
RPV Inst
Describe the reason for backfill. |
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Definition
| -Notching: during depressurizing conditions, gasses leave solution and form bubbles causing the density to decrease and cause higher than actual level indications. |
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Term
RPV Inst
Describe the backfill system and rated flow. |
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Definition
-8 lbm/hr (.016 gpm).
-Metering valves set to 3lbm/hr (.006 gpm).
-From CRD (pure water and low oxygen). |
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Term
RPV Inst
Describe the Rx high pressure SCRAM setpoint. |
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Definition
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Term
RPV Inst
Describe the Rx low pressure setpoint and what happens. |
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Definition
-420 psig if in coincidence with -47".
-Will start LP ECCS pumps and open associated injection valves. |
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Term
RPV Inst
Describe the Rx press HI/LO setpoints. |
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Definition
-1025 psig HI.
-900 psig LO. |
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Term
RPV Inst
Describe the reactor water level HI/LO setpoints. |
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Definition
-LO: +30" with 3 second time delay.
-HI: +40" |
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Term
RPV Inst
Describe the Rx low level scram setpoint and logic. |
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Definition
-Set at +9".
-1 out of 2 taken twice. |
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Term
RPV Inst
Describe the Rx low low water level setpoint and what happens. |
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Definition
-Set at -47".
-Trip recirc drive motor.
-Group 1 and 3 isolation.
-Start HPCI, RCIC, EDGs, and CS. |
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Term
RPV Inst
Describe the Rx High water level trip and what happens. |
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Definition
-Set at +48".
-Trips main turbine and RFPs. |
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