JPM Sim-b — Transfer To Hot Leg Recirculation
Sim | RO/SRO | A4.05 (4.1)
Location: Simulator
Time-Critical: No
Alternate Path: Yes
Estimated Time: 6 minutes
Initial Conditions:
- You are the incoming crew.
- Unit 2 experienced a Large Break LOCA.
- The previous crew completed the actions to transfer to Cold Leg Recirculation IAW EOP-LOCA-3 and have transitioned back to EOP-LOCA-1.
- 22 SI pump tripped following completion of LOCA-3 and is being investigated.
- 21 RHR pump is C/T for scheduled maintenance prior to the event.
Initiating Cue:
- You are the Reactor Operator.
- The CRS has directed you to IMPLEMENT 2-EOP-LOCA-4, TRANSFER TO HOT LEG RECIRCULATION.
- Your evaluator will respond to all alarms not related to your task.
Time-Critical: No
Alternate Path: Yes
Estimated Time: 6 minutes
Initial Conditions:
- You are the incoming crew.
- Unit 2 experienced a Large Break LOCA.
- The previous crew completed the actions to transfer to Cold Leg Recirculation IAW EOP-LOCA-3 and have transitioned back to EOP-LOCA-1.
- 22 SI pump tripped following completion of LOCA-3 and is being investigated.
- 21 RHR pump is C/T for scheduled maintenance prior to the event.
Initiating Cue:
- You are the Reactor Operator.
- The CRS has directed you to IMPLEMENT 2-EOP-LOCA-4, TRANSFER TO HOT LEG RECIRCULATION.
- Your evaluator will respond to all alarms not related to your task.
Task Standard:
The task is satisfactorily met when the applicant has aligned the plant for Hot Leg Recirculation IAW Steps 4 and 8 of 2-EOP-LOCA-4.
The task is satisfactorily met when the applicant has aligned the plant for Hot Leg Recirculation IAW Steps 4 and 8 of 2-EOP-LOCA-4.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 1.0 | Are BOTH RHR Pumps Running? | Determines that ONLY 22 RHR Pump is running (21 RHR pump is C/T). Goes to Step 4. |
| 4.0 | Is 22 RHR Pump Running? | YES — determines that 22 RHR Pump is running. |
| 4.0 * (cont'd) | CLOSE 22CS36 (RHR Supply to CS Valve) | Depresses CLOSE PB for 22CS36 and verifies CLOSE PB illuminates. |
| 4.0 (cont'd) | Is 21SJ45 (RHR Discharge to SI Pumps) OPEN? | Verifies 21SJ45 closed. |
| 4.0 * (cont'd) | OPEN 22SJ49 (Cold Leg Isolation Valve) | Depresses OPEN PB for 22SJ49 and verifies OPEN PB illuminates. |
| 5.0 | Is 22 SI Pump Running? | NO — verifies 22 SI pump tripped. Goes to Step 8. (Alternate path begins here.) |
| 8.0 * | STOP 21 SI Pump | Depresses 21 SI Pump STOP PB on 2CC1 and verifies STOP PB illuminates. |
| 8.0 * (cont'd) | CLOSE 21SJ134 (Cold Leg Discharge Valve) | Depresses CLOSE PB for 21SJ134 on 2CC1 and verifies CLOSE PB illuminates. |
| 8.0 * (cont'd) | OPEN 21SJ40 (Hot Leg Discharge Valve) | Opens 21SJ40 by inserting key and rotating; verifies OPEN PB illuminates. |
| 8.0 * (cont'd) | START 21 SI Pump | Depresses START PB for 21 SI Pump and verifies START PB illuminates. |
Key Decision Point:
Step 5.0 is the alternate path entry — the applicant must recognize that 22 SI pump is NOT running (tripped following LOCA-3 completion) and proceed to Step 8, which realigns 21 SI pump from cold leg to hot leg injection by stopping the pump, closing the cold leg discharge valve, opening the hot leg discharge valve, and restarting the pump.
Step 5.0 is the alternate path entry — the applicant must recognize that 22 SI pump is NOT running (tripped following LOCA-3 completion) and proceed to Step 8, which realigns 21 SI pump from cold leg to hot leg injection by stopping the pump, closing the cold leg discharge valve, opening the hot leg discharge valve, and restarting the pump.
Ref: 2-EOP-LOCA-4 (R41) | Task: 1150110501 | K/A: A4.05 — Ability to manually operate and/or monitor in the control room: Transfer of ECCS flowpaths | Source: Bank | View JPM PDF
Connections
- Related procedures: EOP-LOCA-4 — Transfer to Hot Leg Recirculation
- Related systems: ECCS, RHR
- Related exam: 2023 NRC Operating Exam