Term
RPS
Describe the RPS logic. |
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Definition
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Term
RPS
Describe the power requirements to reset a SCRAM. |
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Definition
| Requires both RPS power supplies available due to bypass around SDV level switches. |
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Term
RPS
Describe the time delay for resetting a SCRAM. |
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Definition
-Prevents reset for 10 seconds following a full SCRAM.
-Ensures full rod travel before SCRAM reset. |
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Term
RPS
Describe how to reset a SCRAM. |
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Definition
-Both power supplies must be available.
-SDV test switch on C-05 in ISOLATE.
-Mode switch in SHUTDOWN or REFUEL.
-SDV high water bypasss on C-05 to BYPASS. |
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Term
RPS
Describe the Turbine Stop Valve Closure SCRAM. |
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Definition
-Any 3 of 4 stop valves <90% open.
-Limits pressure and reactivity transient to prevent exceeding MCPR.
-Bypassed until turbine 1st stage pressure correlates to 30% Rx power. |
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Term
RPS
Describe the Turbine Control Valve Fast Closure SCRAM. |
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Definition
-Turbine oil pressure <172.5 psig on acceleration relay.
-Limits pressure and neutron flux transients.
-Bypassed until turbine 1st stage pressure correlates to 30% Rx power. |
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Term
RPS
Describe the SDV high water level SCRAM. |
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Definition
-Equal to or greater than 54 gallons.
-Assures sufficient volume for a SCRAM.
-Bypassed with:
-Both RPS busses powered.
-Mode switch in SHUTDOWN or REFUEL.
-And key lock in C05 in BYPASS. |
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Term
RPS
Describe the condenser low vacuum SCRAM. |
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Definition
-Equal to or less than 22.5" Hg vac.
-Anticipates loss of heat sink.
-Bypassed when Rx press < 600psig and not in RUN. |
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Term
RPS
Describe the MSIV closure SCRAM. |
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Definition
-3 of 4 MSIV less than 90% open (BADC CABD).
-Reduces flux and pressure transient.
-Bypassed when < 600psig and not in RUN. |
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Term
RPS
Describe the Rx vessel high pressure SCRAM. |
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Definition
-Equal or greater than 1056psig.
-Limits Rx pressure to that assumed in the DBA and transient analysis.
-Can be bypassed in REFUEL. |
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Term
RPS
Describe the IRM SCRAM. |
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Definition
-High trip at 120/125.
-Trip on IRM INOP.
-Bypassed in RUN or when IRM bypassed. |
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Term
RPS
Describe the APRM INOP SCRAM. |
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Definition
-Keylock in INOP.
-Critical self test fault.
-Computer hang up.
-Loss of input power.
-One APRM may be bypassed. |
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Term
RPS
Describe the APRM upscale flux SCRAM. |
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Definition
-18% when not in RUN.
-119.5% when in RUN |
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Term
RPS
Describe the APRM STP HI SCRAM. |
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Definition
-0.66W + 59.6% (two loop).
-0.66(W-7.6%) + 59.6% (single loop).
-Clamped at 114%. |
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Term
RPS
Describe the Rx low water level SCRAM. |
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Definition
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Term
RPS
Describe the high drywell pressure SCRAM. |
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Definition
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Term
RPS
Describe the RPS power supplies. |
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Definition
-RPS MG set A: MCC-111.
-RPS MG set B: MCC-141.
-Y-50: SSPVs SV-117 valves, A and C SDV pilot valves, and SCRAM channels A1, A2.
-Y-40: SSPVs SV-118 valves, B and D SDV pilot valves, SCRAM channels B1, B2.
-Y-60 is alternate.
-Mechanical interlock only allowing to power one.
-From MCC-111. |
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Term
RPS
Describe the power supplies to backup SCRAM valves. |
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Definition
-'A' backup scram valve: D11 from #11 battery.
-'B' backup scram valve: D12 from #12 battery. |
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Term
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Definition
| RPS provides signal to Lo-Lo set that full scram has been received. |
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