JPM Sim-e — Perform Retest on a Main Turbine Stop Valve IAW S2.OP-PT.TRB-0003
Sim | RO | 045 A4.01 (3.1)
Location: Simulator
Time-Critical: No
Alternate Path: Yes
Estimated Time: 8 minutes
Initial Conditions:
- Unit 2 is at 89% power.
- Power ascension is on hold to complete Main Turbine Valve testing IAW S2.OP-PT.TRB-0003, Main Turbine Valve Stroke Testing.
- A Retest on 22MS28 Main Turbine Stop Valve is required due to the valve failing to stroke during valve testing.
- Maintenance repairs are complete and the valve is turned over to the operating shift for testing.
- Control Rods are in Manual with rods at D-200.
Initiating Cue:
- You are the Plant Operator.
- The CRS has directed you to PERFORM retest on 22MS28 Main Turbine Stop Valve (TSV) IAW S2.OP-PT.TRB-0003, Main Turbine Valve Stroke Testing, section 5.4.3.
- All Prerequisites and P&Ls are satisfied.
- Test Preparation section 5.2 is complete.
- An operator is in the field standing by the 22MS28 valve to monitor the valve stroke.
- Notify the CRS the results of the valve stroke test.
- Your evaluator will respond to all alarms not related to your task.
Time-Critical: No
Alternate Path: Yes
Estimated Time: 8 minutes
Initial Conditions:
- Unit 2 is at 89% power.
- Power ascension is on hold to complete Main Turbine Valve testing IAW S2.OP-PT.TRB-0003, Main Turbine Valve Stroke Testing.
- A Retest on 22MS28 Main Turbine Stop Valve is required due to the valve failing to stroke during valve testing.
- Maintenance repairs are complete and the valve is turned over to the operating shift for testing.
- Control Rods are in Manual with rods at D-200.
Initiating Cue:
- You are the Plant Operator.
- The CRS has directed you to PERFORM retest on 22MS28 Main Turbine Stop Valve (TSV) IAW S2.OP-PT.TRB-0003, Main Turbine Valve Stroke Testing, section 5.4.3.
- All Prerequisites and P&Ls are satisfied.
- Test Preparation section 5.2 is complete.
- An operator is in the field standing by the 22MS28 valve to monitor the valve stroke.
- Notify the CRS the results of the valve stroke test.
- Your evaluator will respond to all alarms not related to your task.
Task Standard:
Performs valve stroke steps in the correct order on Turbine Stop Valve IAW approved procedure.
Performs valve stroke steps in the correct order on Turbine Stop Valve IAW approved procedure.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 5.4.3 | IF performing 22MS28/22MS29 testing, THEN: | Reads step, confirms correct valve (22MS28) and continues on. |
| 5.4.3.A | ENSURE TEST PERMISSIVES are green: TURBINE INLET PRESSURE OK, NO OTHER TESTS IN PROGRESS | At TURBINE E-H CONTROL & STATUS monitor, STOP/GOVERNOR VALVE TESTS screen, verifies test permissives are GREEN. Navigates from Operating Screen by selecting TEST then STOP/GOV TEST. |
| CAUTION | Failure of any Main Turbine Stop Valve or Governor Valve to reopen while the Main Turbine is operating, requires compliance with P&L 3.4.3 | Reads Caution and continues. P&L 3.4.3: Main Turbine should be operated at <=75% of turbine load with any one HP Turbine inlet valve (MS28/MS29) CLOSED; <=30% with any two CLOSED. |
| 5.4.3.B | DIRECT Operator to monitor 22MS28 AND 22MS29 for full stroke | CUE: Field Operator will monitor 22MS28 and 22MS29 for stroke. |
| 5.4.3.C | RECORD 22MS28 AND 22MS29 positions on Attachment 1, Section 3.0, by initialing TEST POSITION 1 | Records 22MS28 and 22MS29 are both OPEN. (22MS29 Governor Valve considered OPEN when local position >= 17.9% / >= 2.5 inches.) |
| 5.4.3.D * | SELECT 22MS28/22MS29 START TEST on HMI screen | Selects START TEST on HMI. Verifies 22MS28/22MS29 changes from NORMAL OPERATION to TEST IN PROGRESS. Contacts field operator confirming standing by to monitor. |
| 5.4.3.E | WHEN TSV (22MS28) CLOSED indication is received, THEN RECORD positions | Expects OHA G-12 TURB STM STOP VLV CLSD when 22MS28 closes. Time to close 22MS29 Governor Valve ~2 min from start. Time for full TSV stroke (closed to open) ~25 sec. TSV stays CLOSED ~10 sec then reopens. |
| 5.4.3.E (cont'd) | Field operator reports: 22MS29 is CLOSED and 22MS901 is OPEN, but missed monitoring the 22MS28 stroke | Records 22MS29 CLOSED (Test Position 2) and 22MS901 OPEN (Test Position 1). Must recognize need to RESTROKE to verify 22MS28. (Alternate Path starts here.) |
| RESTROKE * | SELECT RESTROKE on HMI Test screen | Selects RESTROKE on HMI. Records positions of 22MS28 and 22MS901 after restroke. CUE: Field operator reports 22MS28 valve stroked fully closed and open with no issues noted. 22MS901 is OPEN and 22MS29 remains CLOSED. |
| 5.4.3.F * | SELECT 22MS28/22MS29 END TEST on HMI screen | Selects END TEST on HMI screen. |
| 5.4.3.H | WHEN 22MS28/22MS29 changes from TEST IN PROGRESS to NORMAL OPERATION, RECORD positions | CUE: Field operator reports 22MS28 & 22MS29 are OPENED and 22MS901 is CLOSED. Records 22MS28 OPEN (Test Position 3), 22MS29 OPEN (Test Position 4), 22MS901 CLOSED (Test Position 2). Time to open 22MS29 ~2 min. |
| 5.4.3.I | IF all STOP/GOVERNOR VALVE TESTS are completed, THEN SELECT CLOSE WINDOW | JPM is complete. |
Key Decision Point:
At Step 5.4.3.E, the field operator reports missing the 22MS28 stop valve stroke. The applicant must recognize that the valve stroke was not verified by local observation (required by P&L 3.6) and select RESTROKE on the HMI to re-cycle the stop valve so the field operator can properly observe and verify full stroke. Without the restroke, the test would be incomplete and 22MS28 could not be declared operable.
At Step 5.4.3.E, the field operator reports missing the 22MS28 stop valve stroke. The applicant must recognize that the valve stroke was not verified by local observation (required by P&L 3.6) and select RESTROKE on the HMI to re-cycle the stop valve so the field operator can properly observe and verify full stroke. Without the restroke, the test would be incomplete and 22MS28 could not be declared operable.
Ref: S2.OP-PT.TRB-0003 (Rev 20) | Task: N0450130201 | K/A: 045 A4.01 — Ability to manually operate and/or monitor Main Turbine Generator | Source: New | View JPM PDF
Connections
- Related procedures: S2.OP-PT.TRB-0003 — Main Turbine Valve Stroke Testing
- Related systems: Main Turbine
- Related exam: 2019 NRC Operating Exam