JPM Sim-d — Respond to RCP Standpipe Low Level Alarm
Sim | RO/SRO | 003 A1.10 (2.5/2.7)
Location: Simulator
Time-Critical: No
Alternate Path: No
Estimated Time: 6 minutes
Initial Conditions:
- Unit 2 is at 100% power.
- No major equipment is out of service and no Tech Specs are active.
Initiating Cue:
- You are the Reactor Operator.
- Respond to all alarms and indications.
- Your evaluator will respond to all alarms not related to your task.
Time-Critical: No
Alternate Path: No
Estimated Time: 6 minutes
Initial Conditions:
- Unit 2 is at 100% power.
- No major equipment is out of service and no Tech Specs are active.
Initiating Cue:
- You are the Reactor Operator.
- Respond to all alarms and indications.
- Your evaluator will respond to all alarms not related to your task.
Task Standard:
Upon receipt of a RCP standpipe low level alarm, the operator aligns valves to fill the standpipe with primary water, and terminates the fill when the high level alarm is received.
Upon receipt of a RCP standpipe low level alarm, the operator aligns valves to fill the standpipe with primary water, and terminates the fill when the high level alarm is received.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| CUE | 21 RCP standpipe low console alarm illuminates | Operator reports standpipe level low console alarm for 21 RCP. |
| 1.0 | Review CAUSES per S2.OP-AR.ZZ-0011 | Reads likely causes: low seal flow across #2 seal, excessive flow through #3 seal. |
| 3.1 | Determine if standpipe low level AND seal water leakoff flow alarm occur together | Determines no seal leakoff flow alarm is concurrent with standpipe level low — marks step N/A (does NOT go to AB.RCP-0001). |
| 3.2.A | If required, START 21 or 22 Primary Water Pump | Selects one Primary Water pump in Manual and depresses START PB. (Conditional — fill can be done without starting PW pump, but fill takes longer.) |
| 3.2.B * | OPEN 2WR80, PW TO CONTMT STOP V | Depresses OPEN PB for 2WR80 on 2CC2 console (PRT bezels) and verifies OPEN PB illuminates. |
| 3.2.D * | OPEN 21WR62, Standpipe Supply Valve for 21 RCP | Depresses the OPEN PB for 21WR62 on 21 RCP bezel and verifies OPEN PB illuminates. |
| 3.3.A * | When hi level alarm received: STOP the Primary Water Pump | Depresses STOP PB for running Primary Water pump (if previously started) and verifies STOP PB illuminates. |
| 3.3.B * | CLOSE 2WR80, PW TO CONTMT STOP V | Depresses CLOSED PB for 2WR80 and verifies CLOSED PB illuminates. |
| 3.3.C * | CLOSE 21WR62, Standpipe Supply Valve | Depresses CLOSED PB for 21WR62 and verifies CLOSED PB illuminates. |
Key Decision Point:
Step 3.1 is the discriminating step. The applicant must evaluate whether the standpipe low level alarm is accompanied by a concurrent seal water leakoff flow alarm. If BOTH alarms are present, the applicant must transition to AB.RCP-0001 (RCP Abnormality) indicating a potential seal problem. In this JPM, only the standpipe low level alarm is present (caused by #3 seal leak), so the correct action is to continue with the standpipe fill procedure rather than entering the AB.
Step 3.1 is the discriminating step. The applicant must evaluate whether the standpipe low level alarm is accompanied by a concurrent seal water leakoff flow alarm. If BOTH alarms are present, the applicant must transition to AB.RCP-0001 (RCP Abnormality) indicating a potential seal problem. In this JPM, only the standpipe low level alarm is present (caused by #3 seal leak), so the correct action is to continue with the standpipe fill procedure rather than entering the AB.
Ref: S2.OP-AR.ZZ-0011 (Rev 63) | Task: N0020160101 | K/A: 003 A1.10 — Ability to predict and/or monitor changes in parameters associated with operating the RCPS controls: Standpipe level (2.5/2.7) | Safety Fn: 4-Pri | Source: Bank | View JPM PDF
Connections
- Related procedures: S2.OP-AR.ZZ-0011 — Alarm Response (2CC1), AB.RCP-0001 — RCP Abnormality
- Related systems: RCPs
- Related exam: 2022 NRC Operating Exam