-
(SRM – SE) – SCRAM signal
SRM Upscale (> 2 x 10^5 cps)
- Bypass
- Shorting links installed OR
- Joystick
-
(SRM – SE) – Rod Blocks
- SETPOINT
- SRM INOP
- __Module Unplugged
- __Switch out of operate
- __High Volts Lost (Low)*
- SRM Upscale Alarm (> 1 x 10^5 cps)
- BYPASS
- __Joystick OR
- __MSS in RUN OR
- __IRM’s Range 8 or above
- SETPOINT
- SRM Downscale (< 3 cps)
- Detector not fully inserted AND (< 100 cps)
- Bypass
- Joystick OR
- MSS in RUN OR
- IRM’s Range 3 or above
- *Loss of 24VDC does not affect drive power
-
(SRM – SE) – Alarms
Short Period (< 50 sec)
-
(IRM – SE) – Half Scram
Setpoint
- IRM Upscale
- __(120/125 Scale) (38.4/40)
- INOP
- __Module Unplugged
- __Switch out of operate
- __High Volts Lost (Low)*
*IRMs are powered from 24 VDC. They will fail downscale and INOP on a loss of the 24 VDC signal.
Bypass
-
(IRM – SE) – Rod Block
- IRM Upscale (108/125 Scale) (34.5/40)
- INOP (also half scram)
- __Module Unplugged
- __Switch out of operate
- __High Volts Lost(Low)*
- IRM Downscale (B/P in Range 1) (5/125 Scale) (1.6/40)
- Detector Not Full in
- Bypass
- Joystick OR
- MSS in RUN
*IRMs are powered from 24 VDC. They will fail downscale and INOP on a loss of the 24 VDC signal.
-
(APRM – SE) – Rod Block
- P - APRM STP Upscale
- S - <= 0.56W + 53.1%
- ___<= 0.56(W-10.8%) + 53.1% for SLO
- ___<= 108% maximum with high flow clamped
- B - MSS NOT in RUN
- P - APRM Upscale
- S - <= 11% of RTP
- B - MSS in RUN
- P - APRM Downscale
- S - >= 4% of RTP
- B - MSS NOT in RUN
- P - APRM Inoperative
- S - Mode Switch NOT in Operate
- ___The firmware/Software WDT has timed out
- ___A critical Self-Test fault is detected
- B - None
-
(APRM – SE) – Reactor Scram
- P - APRM STP Upscale
- S - <= 0.56W + 58%
- ___<= 0.56(W-10.8%) + 58% for SLO
- ___maximum of 113.5% of RTP
- B - None
- .
- P - APRM Upscale
- S - <= 116.3% of RTP
- ___B - None
- S - <= 17% of RTP
- ___B - MSS in RUN
- .
- P - APRM Inoperative
- S - Mode Switch NOT in Operate
- ___The firmware/Software WDT has timed out
- ___A critical Self-Test fault is detected
- B - None
-
(APRM – SE) – OPRM Trip
- P - Detection of Thermal Hydraulic Instability
- S - Rx Power < 24% OR
- ___Total Recirc Flow > 70%
- ___(Core Flow > 76%) OR
- ___APRM in Bypass
OPRM’s are required to be OPERABLE when reactor power is >=19% (TS Table 3.3.1-1). The OPRM will enable when reactor power is > 24%, as sensed by APRM power AND recirculation drive flow < 70% (nominal).
-
(RECIRC – BB) – Recirc Intermediate Runback
4 BOP Pump Trips
- Level 4 (+30”) w/ RFP trip signal
- CWP Trip (4 initially, Cond Vac > 4.5” HgA)
- PCP Trip w/ Feed > 73.65% and >= 2 RFP Running
- SCP Trip w/ Feed > 73.65% and >= 2 RFP Running
-
(RECIRC – BB) – Recirc Full Runback
SCORE
- Loss of SWC (12 Sec TD)*
- CWP Trip (<=2 running, Cond Vac > 5.8” HgA)
- Discharge valve not full Open
- RPV Level 3 (+12.5”)
- FEEEEEd flow <22% (15 Sec TD)
- *Loss of SWC is determined by the DEHC controller. The DEHC controller has a 15 sec TD BEFORE the R/B 12 sec TD starts (27 Sec Tot)
-
(RECIRC – BB) – Recirc Pump Trips
EOC
- TSV Closure (<95% Open) (EOC)*
- TCV Fast Closure (EHC Press <530 PSIG) (EOC) *@
ATWS
- RPV Pressure 1071 PSIG (ATWS)
- RPV Level -38” (9 Sec TD) (ATWS)
- *Bypassed <18% (1st stage pressure <98.1 psig)
- @No power to RPS bus => EOC RPT assumes >98.1 psig
-
(BOILER INST) - Narrow Range Level
- 0 – (+)60”
- Calibrated hot: 1000 psig
- 135 F Drywell
- 75 F Rx bldg.
-
(BOILER INST) - Wide Range Level
- -150 – (+)60”
- Calibrated hot: 1000 psig
- 135 F Drywell
- 75 F Rx bldg
-
(BOILER INST) - Upset Range
- 0 – (+)180”
- Calibrated hot: 1000 psig
- 135 F Drywell
- 75 F Rx bldg
-
(BOILER INST) - Shutdown Range
- 0 – (+)400”
- Calibrated cold: 0 psig
- 120 F water
- 80 F DW
- 75 F Rx bldg
-
(BOILER INST) - Fuel Range
- -311 – (-)111”
- Calibrated for accident: no jet pump flow
- 0 psig in vessel and drywell
- saturated steam water mixture
- 75 F Rx bldg.
When in refueling the absence of the Fuel Pool Low Level Alarm indicates that level is >22’ 5” above the RPV flange.
-
(BOILER INST) - Wide Range Pressure
0-1200 psig OR 0-1500 psig
-
(BOILER INST) - Narrow Range Pressure
850-1050 psig
-
(BOILER INST) - Low Range Pressure
0-50 psig
-
(BOILER INST) - PAMS Level Instrumentation
Channel A and B – They have the shortest vertical run of piping in the drywell. (See EOP Caution 1)
-
(BOILER INST) - PAMS Recorders Fast/Slow Speed
Shift to fast speed on Level 3 (+12.5” OR 1037 psig) – To return to slow speed, you must hit the button next to the recorder, if you are below 12.5” or above 1037# you cannot return to slow
-
(BOILER INST) - Level Eight (+54”)
- (4 Turbine Trips)
- Main Turbine Trip (NR)
- RFP Turbines Trip (NR)
- HPCI Turbine Trip (WR)
- RCIC “Trip” (WR)*
- *(F045 X => Secures Steam)
-
(BOILER INST) - Level Seven (+39”)
Hi Level Alarm (NR)
-
(BOILER INST) - Level Five/Six (+35”)
Normal Operating Level
-
(BOILER INST) - Level Four (+30”)
- Low Level Alarm
- Intermediate (45%) Recirc Runback
- (IF concurrent w/ an RFP trip)
-
(BOILER INST) - Level Three (+12.5”)
- Reactor Scram
- FWLC Stpt Set-Down (+14”)(.5 sec TD)*
- RHR S/D Cooling Isolations (NSSSS)
- Full Recirc Runback
- ADS Confirmatory Signal
- RHR Sample and D/ch to RW isolation
- *RPV level 12.5” Reduces RFP control band to 14” to (attempt to) prevent over feeding on a scram/low level.
-
(BOILER INST) - Level Two (-38”)
- RCIC/HPCI Initiate
- RRCS Input
- __ARI
- __RPT (9 Sec TD)
- __Start 3.9 minute SLC timer
- A&B SACS pump start
- RBVS isolates, supply and exh. fan trip
- FRVS fans start
- Radwaste Supply and exh. fans trip
- EIAC trips
- PCIS Isolations:
- __RC Boundary Leak Det. Syst.
- __H2/O2 Analyzers
- __CPCS/N2ME/DW Purge Valves
- __H2 Recombiner
- __TWCU
- __PCIG (minor)
- __Drywell Floor and Equipment Drains
- NSSSS Isolations
- __RWCU F001/F004
- __Recirc Sample 4310/4311
- __TIPS Retract and Isolate
-
(BOILER INST) - Level One (-129”)
- CS/LPCI Initiate
- Signal to ADS Logic
- A-D Diesels, SACS, and SSW Start
- CRD Trips
- PCIG Trips
- FPC, PCIG, TACS SACS cross ties close
- RACS pumps A&B Trip, SSW to RACS Isol.
- RACS to Turb and Aux bldgs isolates
- TSC Chillers Start
- CREF aligns and both loops start
- Non 1E MCCs Trips
- __DW Coolers Trip
- __MT LO Pumps and Lift Pumps Trip
- __RFP LO Pumps Trip
- NSSSS Isolations
- __MSIVs and MSIV Drains (F016 & F019)
- PCIS Isolations
- __Chilled Water to DW
- __RACS to Recirc Pump Pedestal
- __CRD to Recirc Seal Purge
-
(BOILER INST) – Level of Concern +217.5”
Rx Flange
-
(BOILER INST) – Level of Concern +118”
Steam Lines
-
(BOILER INST) – Level of Concern +80”
Top of Moisture Separator
-
(BOILER INST) – Level of Concern -161”
TAF
-
(BOILER INST) – Level of Concern -211”
Level Zero
This is equivalent to the top of the jet pump throat threat sections 2/3 core height
It is the minimum reactor vessel level following recovery from a double ended shear of a recirc suction line
-
(BOILER INST) – Level of Concern -311.5
BAF
-
(BOILER INST) – Steam Dryer Pressure Drop affects level how?
The pressure drop across the steam dryers can cause a 7” level difference (inside core shroud-downcomer).
-
(BOILER INST) – Pressure Setpoint for SRV’s A,B,C,D,E
1130
-
(BOILER INST) – Pressure Setpoint for SRV’s G,J,L,R,P
1120
-
(BOILER INST) – Pressure Setpoint for SRV’s K,M,F, H
1108
-
(BOILER INST) – Pressure Setpoint for RRCS High Press (ATWS)
1071
-
(BOILER INST) – Pressure Setpoint for Lo-Lo Set Actuation (Lo-Lo Set Armed, SRV P Open)
1047
-
(BOILER INST) – Pressure Setpoint for SCRAM
1037
-
(BOILER INST) – Pressure Setpoint for High Pressure Alarm
1022.4
-
(BOILER INST) – Pressure Setpoint for Lo-Lo Set H Opens after SRV is armed
1017
-
(BOILER INST) – Pressure Setpoint for Lo-Lo Set P Closes
935
-
(BOILER INST) – Pressure Setpoint for Lo-Lo Set H Closes
905
-
(BOILER INST) – Pressure Setpoint for MSIV Close w/ Mode sw/ in run (NSSSS)
756
-
(BOILER INST) – Pressure Setpoint for Core Spray Injection Permissive
461
-
(BOILER INST) – Pressure Setpoint for LPCI Injection Permissive
450
-
(BOILER INST) – Pressure Setpoint for HPCI Isolates
100
-
(BOILER INST) – Pressure Setpoint for RHR SDC High Pressure Isolation
82
-
(BOILER INST) – Pressure Setpoint for RCIC Isolates
64.5
-
(RRCS - SA) – RRCS pressure trip setpoint and actuations:
>1071psig
- ARI
- __Immediate
- RPT Trip
- __Immediate
- Feedwater Runback to 2500 RPM (650 RPM IF Speed Control Failure)
- __After 25 second TD IF APRMs not Downscale or INOP
- SLC initiation and RWCU isolation
- __After 3.9 minute TD IF APRMs not Downscale or INOP
-
(RRCS - SA) – RRCS level trip setpoint and actuations:
Low Level <-38”
- ARI
- __Immediate
- RPT Trip
- __After 9 sec TD (Seals in)
- SLC initiation and RWCU isolation
- __After 3.9 minute TD IF RPV level < -38” AND IF APRMs not Downscale or INOP
-
(RRCS - SA) – Manual Initiation
- ARI
- __Immediate
- SLC initiation and RWCU isolation
- __After 3.9 minute TD IF APRMs not Downscale or INOP
-
(RRCS - SA) – RRCS High Pressure (1071 psig)
- 0 s_____ARI Valves Open
- ________Both Recirc Pump RPT Breakers Trip
- ________RFP, ARI, SLC Timers Start
- 25 s____RFPs Runback (2500 RPM)
- 30 s____“ARI Ready for Reset” IF High Press Clear
- 55 s____RFP control returned to operator in MAN
- 3.9 m __SLC Initiates IF APRMs INOP or not DNSCL
- ________Starts 10 min reset timer
- 13.9 m_“RRCS Ready for Reset” light
-
(RRCS - SA) – RRCS Low Level (-38”) Time sequence of events
- 0 s_____ARI Valves Open
- ________RPT, ARI, SLC Timers Start
- 9 s_____Both Recirc Pump RPT Breakers Trip
- 30 s____“ARI Ready for Reset” IF High Press Clear
- 3.9 m __SLC Initiates IF APRMs INOP or not DNSCL
- ________Starts 10 min reset timer
- 13.9 m_“RRCS Ready for Reset” light
-
(RPS – SB) - Vessel Water Level – Lo Setpoint and B/P
- S - >= 12.5" (Level 3)
- B – None
-
(RPS – SB) - Vessel Steam Dome Pressure – Hi Setpoint and B/P
-
(RPS – SB) - Drywell Pressure – Hi Setpoint and B/P
-
(RPS – SB) - Manual Scram (Push Buttons) Setpoint and B/P
-
(RPS – SB) - APRM Neutron Flux Upscale
- S - <= 17% of Rated Thermal Power
- B - MSS in RUN, Joystick in Bypass
- S - <= 116.3% of Rated ThermalPower
- B - Joystick in Bypass
-
(RPS – SB) - APRM Simulated Thermal Power Upscale (Flow Biased)
- S - <= 0.56W + 58 %
- ___<= 0.56(W-10.8%) + 58% for SLO
- ___<= 113.5% of Rated Thermal Power (High Flow Clamped)
- B – No bypass
-
(RPS – SB) - APRM Inoperative
- S - Mode Switch NOT in OPERATE
- ___Firmware/Software WDT has timed out
- ___Critical Seft-Test Fault is detected
- B - Joystick in Bypass
-
(RPS – SB) - IRM Hi-Hi
- S - <= 120/125 full-scale
- B - MSS in RUN, Joystick in Bypass
-
(RPS – SB) - IRM Inoperative S/B
- S - Module unplugged
- __Function switch NOT in OPERATE
- __High Voltage power supply low.
- B - MSS in RUN
- __Joystick in Bypass
-
(RPS – SB) - SRM Hi-Hi
- S - <= 2.0 X 10^5 CPS
- B - When Shorting Links are Installed, Joystick in Bypass
-
(RPS – SB) - Mode Switch in SHUTDOWN
- S - N/A
- B - 10 Seconds after MSS in SHUTDOWN
-
(RPS – SB) - Scram Discharge Volume Level – Hi
- S - 80.5" above Instrument zero (South Header)
- 83.25" above Instrument zero (North Header)
- B - MSS in SHUTDOWN OR
- MSS in REFUEL AND
- Keylock Switch in BYPASS
-
(RPS – SB) - MSIV Closure
- S - <= 8% closed
- B - MSS NOT in RUN
- MSIV Position requires 3 of 4 MSL’s to be closed for a full SCRAM
- 1/2 SCRAM on any combination that is NOT A&D or B&C.
-
(RPS – SB) - Turbine Stop Valve Closure
- S - <= 5% closed
- B - Turbine First Stage Pressure <=98.1#
- Turbine Stop Valve Position requires 3 of 4 TSV’s to be closed for full SCRAM.
- 1/2 SCRAM on any combination that is NOT 1&4 or 2&3.
-
(RPS – SB) - Turbine Control Valve Fast Closure, EHC Trip Oil Pressure – Lo #
- S - >= 530 psig EHC Trip Oil Pressure
- B - Turbine First Stage Pressure <=98.1 #
- TCV Fast Closure is sensed by TCV ETS pressure low. Logic for full SCRAM is “1 out of 2, taken twice” logic.
- 1/2 SCRAMs on combinations 1&4 or 2&3.
-
(RPS – SB) - OPRM Trip
- S - Detection of Thermal Hydraulic Instability
- B - Reactor Power < 24% OR
- __Total Recirc Flow > 70%
- __Core Flow > 76% (nominal) OR
- __APRM in Bypass
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