Immediate Actions Flashcards
IFR-001 PZR Pressure OR Control System Issue
A) Check PZR # stable or trending to 2235#
(RNO)
- If problem can be immediately linked to a PORV, go to 1.B
- Restore PZR pressure using manual control of any of the following:
*PZR pressure master controller
*Spray controllers (NRV-163 and 164)
*PZR heaters: establish and maintain control band (2225-2245#)
- If either spray valve cannot be closed:
*Trip reactor
*Go to E-0, step 1
*Trip 2, 3, and 4 RCP’s after Rx Trip verified.
*Continue procedure along with E-0.
B) Check PZR PORV’s closed
(RNO)
- Isolate any PORV which is open due to an instrument or control system by:
*Close the affected PORV (NRV-151 thru 153)
*Close the affected PORV block valve (NMO-151 thru 153)
IFR-001 PZR Level Instrument or Control System Issue
A) Check level stable or trending to program level
(RNO)
- Place PZR level control in manual using one of the following and restore level to
program:
* Level master controller
* QRV-251
B) Check letdown in service
(RNO)
- Minimize charging flow
IFR-001 VCT Level Issue
A) Check VCT level channels, both less than 78%. (QLC-451 & 452)
(RNO)
- If either channel is less than 78% and lowering, then verify QRV-303 is in the VCT
position.
*Establish manual VCT level and pressure control (15-78% and 15-35#)
B) Check Auto VCT makeup not in progress
(RNO)
- If makeup is not required, then place Reactor Coolant Makeup Blend Control to
Stop/Neutral
* Establish manual VCT level and pressure (15-78% and 15-35#)
IFR-001 Letdown Temp, Pressure, OR Control System Issue
A) Check letdown temp stable or near setpoint
(RNO)
- Place letdown temp controller in MAN and stabilize temp
* Establish manual control and do not exceed 143F with demins in service
B) Check letdown pressure stable or near setpoint
(RNO)
- Place letdown pressure controller in Man and stabilize letdown pressure between
160-350# so as to not exceed the desired flow.
C) Check letdown temp and pressure stable
(RNO)
- Isolate letdown
- Minimize charging flow
IFR-001 Unexpected Control Rod Motion
A) Check load rejection or Runback not in progress
(RNO)
- Transition to 4022-001-002 Loss of Load
B) Check Rod Control:
- In Manual
(RNO)
- If not, place in manual
-Rod Motion Stopped
(RNO)
- If not, Trip Rx and go to E-0
-Establish manual temp control band (+/- 2F from Tref)
IFR-001 Unexpected Operation of the Steam Dump system
A) Check steam dump valves controlling properly
(RNO)
-Control steam dumps:
*If in Tave Mode, place steam dump control selector switches in OFF
-OR-
*If in steam pressure Mode, then take manual control and control RCS temp as
desired.
-OR-
*If manual control does not work, then place control to off and verify S/G PORV’s
control RCS temp as desired.
IFR-001 S/G Pressure, Level, Main Feed Pump D/P Issue
A) Check S/G NR level stable or trending to 44%
(RNO)
- Restore NR level using manual control of appropriate FRV
* FRV-210, 220, 230, 240 (40-48%)
B) Check S/G PORV’s closed
(RNO)
- Manually close any PORV which is open due to an instrument or control system
fault
*MRV-213, 223, 233, 243
C) Check MFP D/P controlling at appropriate D/P for current actual steam flow
(RNO)
- Take manual control for the MFP(s) in speed control or D/P control and maintain
D/P stable in the desired band (45-173#)
IFR-001 Feedwater Heater Level Control Issue
A) Check affected heater level control valve controlling properly in AUTO
(RNO)
- Take manual control of affected heater and maintain level in the desired band.
IFR-001 Lube Oil Temp Control Issue
A) Check affected Lube Oil Temp Controller operating properly in AUTO (MTLO, East and West MFP)
(RNO)
- Place affected lube oil temp controller in Hand and stabilize temp in desired band
(110-120F, if in service)
B) Check lube oil temp for affected component under control
(RNO)
- If the associated air op valve will not maintain lube oil temp, then use the motor
op valve for the affected cooler (MTLO, east and west MFP)
C) Check lube oil temp for affected component under control
(RNO)
- If control cannot be established, then consider removing component from service.
E-0 Rx Trip or SI
1) Check Rx Trip:
- Trip and bypass breakers open
- Rod bottom lights lit
- All rods less than 10 steps
- Neutron flux lowering
(RNO) Manually trip Rx
- If WR log power is not less than 5% or WR startup rate is not negative, then go to
FR-S.1
2) Check Turbine Trip:
a) All turbine stop valves closed status lights lit
(RNO) Manually trip turbine
-If turbine will not trip, manually actuate AMSAC
-If AMSAC does not trip turbine, perform:
*Trip all S/G stop valves (MRV-210, 220, 230, 249)
*Verify S/G stop valve dump valves are closed (MRV-211, 221, 231, 241)
3) Check power emergency busses
a) At least one emergency bus energized (T11(21)A or T11(21)D)
(RNO) Go to Loss of All A/C
b) Check both open phase annunciators clear
(RNO) Check affected RCP bus voltage, all greater than 110V
- If any RCP bus voltage is less than 110V, inform US and open the affected RCP
bus supply breaker
c) All AC emergency busses energized (T11(21) A-D)
(RNO) When time permits, then try to restore power to de-energized AC
emergency buses
4) Check SI status
a) SI Actuated status light lit
(RNO)
(a) Check if SI required, and manually initiate if required.
- PZR < 1775#, OR
- Containment # >1#, OR
- S/G # < 500#, OR
- Steamline D/P > 100#
(b) If SI not required, perform:
- Reduce feed flow < 4.5E5 pph (maintain >2.4E5 until level > 13% NR)
- Go to Rx Trip response
b) Both CCP ELO “SI signal” white lights lit
(RNO) Manually initiate both SI trains
FR-S.1 Response to Nuclear Power Generation/ATWS
1) Check Reactor Trip:
- Rx trip and bypass breakers open
- Rod bottom lights lit
- All rods < 10 steps
- Lowering neutron flux
(RNO)
- Manually trip the reactor
- If Rx will not trip, manually insert rods.
2) Manually Actuate AMSAC
3) Check Turbine Trip:
A) All turbine stop valve status closed lights lit.
(RNO)
- Manually trip turbine
- If trip doesn’t work, actuate ATWS runback
- If runback doesn’t work, trip stop valves and verify stop valve dump valves closed.
Loss of One Main Feed Pump (UNIT 1)
1) Check Turbine Runback to <60%
(RNO)
- Manually reduce turbine load to <60%
2) Maintain Tavg on Program
a) Check rod control in AUTO
(RNO)
- If rod control available, place in AUTO
- If auto rod control not available, operate in Manual
3) Close tripped MFP ELO Valves
- East: FRV-251 & 252
-OR-
- West: FRV-253 & 254
4) # Maintain Steam/Feed Flow Mismatch
- Adjust running MFP speed (4600RPM @ 500RMP/min) when levels begin to rise
- Remove integration from FRV’s when levels begin to rise
5) # Start standby pumps as required
- Hotwell and Condensate Booster Pumps
6) # Start AFW pumps as required
- TDAFP, East MDAFP, and West MDAFP
7) # Restore Main Turbine Control to normal
a) When Runback complete, place in MW control OUT.
Loss of One Main Feed Pump (UNIT 2)
1) Check Rx Power < or equal to 90%
(RNO)
- Manually trip and go to E-0
2) Check Runback to 752 MW
(RNO)
- Manually reduce turbine load
3) Maintain Tavg on program
a) Check rods in AUTO
(RNO)
- If rod control available, place rods in auto.
- If rod control not available, operate in manual.
4) Close tripped MFP ELO’s
- East: FRV-251 & 252
-OR-
- West: FRV-253 & 254
5) # Maintain Steam/Feed Flow Mismatch
- Adjust running MFP speed (4800RPM @ 500RMP/min) when levels begin to rise
- Remove integration from FRV’s when levels begin to rise
6) # Start standby pumps as required
- Hotwell and Condensate Booster Pumps
7) # Start AFW pumps as required
- TDAFP, East MDAFP, and West MDAFP
8) # Check running MFP steam supply
a) Steam pressure controller AUTO setpoint to 105#
* East: ARV-11
* West: ARV-12
9) Restore Turbine control to normal
a) When Runback complete, place in MW control OUT.
Loss of CCW
1) Check Unit in MODE 1
(RNO)
- Trip all RCP’s and go to step 4
2) Remove RCP’s from service
a) Trip Rx
b) Perform E-0 while continuing with this procedure
c) Trip all RCP’s
(RNO)
- If RCP’s fail to trip, perform local trip
Loss of All A/C (ECA-0.0)
1) Check Rx Trip
- Rx Trip and Bypass breakers open
- Neutron flux lowering
(RNO)
- Manually trip
2) Check Turbine Trip
a) All turbine stop valve closed status lights LIT
(RNO)
- Manually trip turbine
- Manually initiate AMSAC
- Trip stop valves
- Verify stop valve dump valves closed
