ML041120540
| ML041120540 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 01/06/2004 |
| From: | Pickley T Exelon Generation Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 50-461/04-301 50-461/04-301 | |
| Download: ML041120540 (13) | |
Text
Scenario Outline Facility: Clinton Power Station Scenario No.: NRC 1.3 Op Test No.: 1 Examiners:
Operators:
Initial Conditions:
A startup is in progress with power currently at 9% reactor power.
Mode switch has just been placed in RUN.
CRD A is out of service for motor replacement.
Control 24-29 is stuck at position 48 Turnover:
Continue with power ascension IAW GP.
Event No.
Malf. No.
Event Type*
Event Description 1
N/A R
SRO RO Raise reactor power with control rods.
2 LS02 I
RO SRO Control rod reed switch failure.
3 I/O C
BOP SRO Auto start of SX Pump with failure of SX isolation valve to close.
4 HP13H C
BOP SRO Inadvertent opening of an ADS SRV 5
PC11B I
BOP SRO Inadvertent dump of the Upper Containment Pool 6
RR02A C
RO SRO Reactor Recirculation Pump Trip 7
YPXMALSE(665)
M All Seismic event causing LPCS suction line break (Unisolable)
(N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor Transient
Narrative Summary Event(s)
Description 1
The SRO should direct the RO to continue the power increase with control rods.
2 While pulling control rods a reed switch fails requiring the use of substitute position.
3 A Shutdown Service Water pump auto starts and the isolation valve fails to close. This requires closing the valve with the hand switch. SRO must evaluate Tech Specs.
4 Inadvertent opening of an SRV requires entry in CPS 4009.01 Inadvertent opening safety/relief valve and CPS 4005.01 Loss of feedwater heating. The SRV closes on the first attempt. The ADS SRV should be declared inop and the Tech Spec LCO entered 5
An inadvertent dump of the Upper Containment Pool requires entry into EOP-6 on high suppression pool level.
6 A Reactor Recirculation Pump Trip requires actions for single loop.
7 A Seismic event causes a LPCS suction line break that requires a scram and Blowdown due to low Suppression Pool level.
Critical Tasks Manually Scram prior to Emergency Depressurization.
Emergency Depressurize prior to Suppression Pool level reaching 15 1.
EOPs Entered EOP-8, Secondary Containment Control EOP-6, Primary Containment Control EOP-1, RPV Control EOP Contingencies Entered EOP-3, Emergency RPV Depressurization
Event No.(s):
1 Page 1
of 1
==
Description:==
Raise reactor power with control rods.
Initiation: When the crew takes the shift Cues: Directed by SRO Time Position Applicants Actions or Behavior RO Withdraws Control Rods to raise power.
BOP o Monitors reactor to ensure operations remain within established bands o Monitors control room panels and notifies the SRO of any unusual or unexpected conditions.
SRO Directs actions listed above.
Terminus: Observable power increase has been observed NOTES:
Solid bullets are required actions o Hollow bullets are actions that may or may not be performed
Event No.(s):
2 Page 1
of 1
==
Description:==
Control rod reed switch failure.
Initiation: During Control Rod Withdrawal Cues: Annunciator 5006-2H ROD OUT BLOCK and a DATA FAULT light Time Position Applicants Actions or Behavior RO Per 3304.02 ROD CONTROL AND INFORMATION SYSTEM:
o Verify that the INDIVID DRIVE light is energized on the OCM. If not, select individual drive by depressing DRIVE MODE push-button.
Depress the SUBST POSITION push-button.
o Verify:
No other gang member of the rod having the defective reed switch is presently using substitute data.
Data from the other channel is not substitute data.
RAW DATA is not selected.
Select the rod with the defective reed switch.
o Ensure that the rod is at the position at which the defective reed switch exists.
Depress the ENT SUBST push-button located in the PATTERN CONTROL section of the OCM.
o Verify that the data has been entered by depressing the SUBST POSITION push-button. All rods with substitute data are indicated.
BOP o Monitors reactor to ensure operations remain within established bands.
o Monitors control room panels and notifies the SRO of any unusual or unexpected conditions.
SRO Directs actions listed above.
Terminus: Substitute position has been entered NOTES:
Solid bullets are required actions o Hollow bullets are actions that may or may not be performed
Event No.(s):
3 Page 1
of 1
==
Description:==
Auto start of SX Pump with failure of SX isolation valve to close.
Initiation: By direction of lead examiner Cues: Annunciator 5064-1D AUTO START SSW PUMP 1A Time Position Applicants Actions or Behavior RO o Monitors reactor to ensure operations remain within established bands.
o Monitors control room panels and notifies the SRO of any unusual or unexpected conditions.
BOP Per 5064-1D Annunciator procedure o Verify SSW Pump 1A running.
o Verify 1SX014A closed, and 1SX063A & 1SX013D (local) open.
Close 1SX014A o Verify SSW Pump Room 1A supply fan running.
o Coordinate with Chemistry for securing/starting RWT Chemical injection to the SX 1A Pump per CPS 3209.01, Raw Water Treatment (RWT) System.
o Report SSW Pump 1A discharge pressure is indicating zero o Dispatch E area to check the operation of the SSW pump SRO Directs actions listed above.
Enters Tech. Specs:
3.7.1.B Restore SX subsystem to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
3.8.1.B Perform SR 3.8.1.1 for OPERABLE offsite circuit(s) within1 hour and Restore the Div 1 DG to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
Terminus: Tech Specs have been entered NOTES:
Solid bullets are required actions o Hollow bullets are actions that may or may not be performed
Event No.(s):
4 Page 1
of 1
==
Description:==
Inadvertent opening of an ADS SRV Initiation: By direction of lead examiner Cues: Annunciator 5067-8L SRV MONITORING SYSTEM TROUBLE Time Position Applicants Actions or Behavior RO o Select the CNMT SUPPORT DCS display.
Identify that SRV F047A is open.
BOP Per CPS 4009.01 Inadvertent opening safety/relief valve Sound the containment evacuation alarm.
Place the SRV control switch to OPEN, and back to OFF.
Identify the SRV has shut.
SRO Direct crew to enter CPS 4009.01 Inadvertent opening safety/relief valve.
Declare ADS valve F047A inop, enter LCO 3.5.1.e.1, restore within 14 days.
Terminus: Tech Specs have been entered and the SRV is shut.
NOTES:
Solid bullets are required actions o Hollow bullets are actions that may or may not be performed
Event No.(s):
5 Page 1
of 1
==
Description:==
Inadvertent dump of the Upper Containment Pool Initiation: By direction of lead examiner Cues: Annunciator 5041-5F Not fully closed SM line A shutoff valve Time Position Applicants Actions or Behavior RO Reports SPDS alarm on Suppression Pool Level and reports Suppression Pool level.
BOP Reports the following alarms:
5041-5F Not fully closed SM line A shutoff valve.
5040-5F Low level upper containment pool.
5063-3E & 5062-3E Suppression pool level high.
Per 5041-5F:
Disables the SM dump.
Closes the SM dump valves.
o Reports trip of FC pump B SRO Enters EOP-6 due to Suppression Pool High Level Hold pool level below Figure Q.
Start the H2O2 monitors.
Note: The SRO could determine that an emergency does not exist and exit the EOP.
Enters the following Tech Spec LCOs:
3.6.2.4.A Restore upper pool level within 4 hrs.
3.6.2.4.C Restore Suppression Pool Makeup within 7 days.
3.6.2.2 Restore Suppression Pool level within 2 hrs.
Directs BOP operator to:
Take actions per 5041-5F to close the SM makeup valves.
Restore upper pool level with RHR or FC.
Terminus: Tech Specs have been entered and actions taken to shut the SM makeup valves.
NOTES:
Solid bullets are required actions o Hollow bullets are actions that may or may not be performed
Event No.(s):
6 Page 1
of 1
==
Description:==
Reactor Recirculation Pump Trip Initiation: By direction of lead examiner Cues: Annunciator 5003-1F RECIRC PMP A MTR BRKR TRIP Time Position Applicants Actions or Behavior RO Identifies Recirc Pump trip and reports to SRO.
Per 4008.01 ABNORMAL REACTOR COOLANT FLOW:
Shuts 1B33-F067A RR pump A discharge valve per CPS 4008.01 step 3.2.
o Reports critical parameters to SRO including Loop flows and Reactor Power.
BOP o Monitors reactor to ensure operations remain within established bands.
o Monitors control room panels and notifies the SRO of any unusual or unexpected conditions.
SRO Enters CPS 4008.01 Abnormal Reactor Coolant Flow.
Enters ITS LCO 3.4.1 for single loop operation.
- 1. Thermal Power 58%.
- 2. Total core flow and thermal power within limits.
- 3. Required limits modified for single loop.
- 4. Thermal power scram setpoint reset within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
Refers to CPS 3004.01 TURBINE STARTUP AND GENERATOR SYNCHRONIZATION, for single loop ops.
Terminus: Tech Specs have been entered and actions taken for single loop.
NOTES:
Solid bullets are required actions o Hollow bullets are actions that may or may not be performed
Event No.(s):
7 Page 1
of 1
==
Description:==
Seismic event causing LPCS suction line break (Unisolable)
Initiation: By direction of lead examiner Cues: Annunciators: Seismic Alarms and EOP-8 entry conditions Time Position Applicants Actions or Behavior RO Observes and reports entry conditions for EOP-8.
BOP o Observes and reports entry conditions for EOP-8.
o Operates (verifies operation of) area coolers.
o Operates (verifies operation of) VF.
o Evacuates affected areas of Secondary Containment.
o Monitors area temperatures, levels and radiation levels.
Shuts down and isolates LPCS.
SRO Enters EOP-8 and directs and verifies:
Operate VF.
Operate area coolers.
Hold floor drain sump levels below max. normal.
Isolate all discharges into the affected area except systems needed for:
EOP Actions Fire Fighting Monitor area temperatures, levels and radiation levels Directs additional actions:
o Notification of Radiation Protection (RP) Department.
o Evacuate affected areas of Secondary Containment.
Initiates actions per CPS No. 4304.01 FLOODING:
o Dispatch area operators to locate and isolate source of flooding.
o Notify RW and RP of flooding source and magnitude.
Verifies LPCS not needed for Core cooling.
Directs shutdown and isolation of LPCS.
Terminus: None NOTES:
Solid bullets are required actions o Hollow bullets are actions that may or may not be performed
Event No.(s):
7 Page 1
of 1
==
Description:==
Seismic event causing LPCS suction line break (Unisolable)
Initiation: By direction of lead examiner Cues: Annunciators: Seismic Alarms and EOP-6 entry conditions Time Position Applicants Actions or Behavior RO Observes and reports entry conditions for EOP-6 Places the mode switch in SHUTDOWN Reports that Reactor Power is ~1%
BOP o Starts H2O2 Monitors o Holds SP Level above 15 1 by filling the SP SRO Directs and verifies performance of appropriate actions per EOP-6:
o Start H2O2 monitors o Monitor status and hold condition of containment/drywell parameters Directs that normal Suppression Pool Makeup be initiated Determines that SP Level cannot be maintained above 15'1" and, directs and verifies performance of appropriate actions per EOP-1 Mode Switch to SHUTDOWN Enter CPS No. 4100.01, Reactor Scram Verify needed automatic actions:
Isolations ECCS start DG start Control RPV Water Level between Level 3 and Level 8 Stabilize RPV pressure below 1065 psig Terminus: None NOTES:
Event No.(s):
7 Page 1
of 1
==
Description:==
Seismic event causing LPCS suction line break (Unisolable)
Initiation: By direction of lead examiner Cues: Annunciators: Seismic Alarms and EOP-6 entry conditions Time Position Applicants Actions or Behavior RO Maintain level 3 to 8 BOP Initiates ADS, Reports that 7 SRVs have opened.
SRO Determines that still cannot hold pool level above 15'1" Anticipates blowdown and directs the Turbine Bypass valves opened Enters EOP-3 and directs actions:
Prevent LPCS and LPCI injection not needed for core cooling Directs ADS initiation Terminus: None NOTES:
Solid bullets are required actions o Hollow bullets are actions that may or may not be performed
Simulator Operator Instructions Initial Setup
- 1. Verify daily lamp test completed
- 2. Reset to IC labeled scenario #3.
- 3. Load the lesson plan for this scenario
- 4. Place simulator in RUN
- 5. Tag out the ERAT
- 6. Turn on and advance recorders
- 7. Reset SRM A drawer
- 8. Verify the AR/PR server is running and stabilize AR/PR
- 9. Verify GETAR alarm is reset
- 10. Identify T/S issues associated with OOS and turnover
- 11. Verify simulator conditions match the turnover
Event Triggers and Role Play Event #
- 1. Raise reactor power with control rods.
- a.
None
- 2. Control rod reed switch failure.
- a.
Remote 1
- a. Remote 2
- b. Roll play as E area report SX pressure is 170 psig
- a.
Remote 3
- 5. Inadvertent dump of the Upper Containment Pool
- a.
Remote 4
- 6. Reactor Recirculation Pump Trip
- a.
Remote 5
- 7. Seismic event causing LPCS suction line break (Unisolable)
- a.
Remote 6