JPM Sim-e — Synchronize the Main Generator
Sim | RO/SRO | 045 A4.02 (2.7/2.6)
Location: Simulator
Time-Critical: No
Alternate Path: No
Estimated Time: 18 minutes
Initial Conditions:
- Unit 2 is at 16% power starting up from a maintenance outage.
- The crew is performing power ascension activities IAW S2.OP-IO.ZZ-0003, Hot Standby to Minimum Load.
- The main turbine is at 1800 rpm with generator excitation applied.
Initiating Cue:
- You are the Plant Operator.
- The CRS has directed you to synchronize the Generator IAW S2.OP-SO.TRB-0001, Turbine-Generator Startup Operations, Section 4.5, Synchronizing the Generator.
- All Prerequisites are completed SAT.
- Step 4.5.1 IVs are completed SAT.
- Synchronize the Generator starting at Step 4.5.2. The 500 KV 1-9 breaker will be closed first followed by the 500 KV 9-10 breaker.
Time-Critical: No
Alternate Path: No
Estimated Time: 18 minutes
Initial Conditions:
- Unit 2 is at 16% power starting up from a maintenance outage.
- The crew is performing power ascension activities IAW S2.OP-IO.ZZ-0003, Hot Standby to Minimum Load.
- The main turbine is at 1800 rpm with generator excitation applied.
Initiating Cue:
- You are the Plant Operator.
- The CRS has directed you to synchronize the Generator IAW S2.OP-SO.TRB-0001, Turbine-Generator Startup Operations, Section 4.5, Synchronizing the Generator.
- All Prerequisites are completed SAT.
- Step 4.5.1 IVs are completed SAT.
- Synchronize the Generator starting at Step 4.5.2. The 500 KV 1-9 breaker will be closed first followed by the 500 KV 9-10 breaker.
Task Standard:
Synchronizes the Generator to the electrical grid IAW S2.OP-SO.TRB-0001.
Synchronizes the Generator to the electrical grid IAW S2.OP-SO.TRB-0001.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 4.5.2 | Ensure 500 KV BUS SECT 9-10 (30X) Breaker selected to 9-10 LOCAL | Verifies 9-10 Breaker is selected to 9-10 LOCAL. |
| 4.5.3 | Select No. 2 Unit Scope Transfer Switch to REGULAR or SPARE SCOPE | Verifies REGULAR SCOPE is illuminated on 2RP6. |
| 4.5.4 | Scope test — verify synchroscope and voltmeters respond | Presses SCOPE TEST pushbutton on 500KV Breaker Sections 1-9 (32X). Verifies synchroscope hand at 12 o'clock. Verifies INCOM KV and RUN KV voltmeters move upscale. Releases SCOPE TEST PB. |
| 4.5.5 | Verify MAIN GEN SYNC PERM BYPASS keylock switch in NORMAL | Verifies MAIN GEN SYNC PERM BYPASS keylock switch is in NORMAL position. |
| 4.5.6 * | Select 1-9 Mimic Bus and 1-9 SYNCH POT ON | Depresses 1-9 Mimic Bus PB and verifies yellow backlight AND console bezel for MIMIC BUS 1-9 INTERLOCK CLOSE SELECTION is illuminated. Depresses 1-9 SYNCH POT ON and verifies bezel illuminates. |
| 4.5.8 * | Adjust INCOM KV to 3-5 KV greater than RUN KV using Voltage Regulator | Determines INCOM KV is NOT 3-5 KV greater than RUN KV (as-found: INCOM KV ~499, RUN KV ~498). At EXCITATION, VOLTAGE REGULATOR, VREG CNTRL SETPT ADJ, depresses RAISE SETPT until INCOM KV is 3-5 KV greater than RUN KV (at least 501 KV to meet Synch Permissive). |
| 4.5.12.1 * | Adjust turbine speed until synchroscope rotates SLOWLY in FAST direction (~1 revolution every 25-30 seconds) | Determines turbine speed adjustment required. Adjusts SETTER 1-2 rpm above reference (as-found: SETTER = 1801, raise to 1802-1803). Selects SETTER GO (illuminates green). Verifies ACTUAL and REFERENCE speed adjust to SETTER speed. Synchroscope rotates slowly in FAST direction. |
| 4.5.12.3 * | Close 500KV 1-9 (32X) breaker when synchroscope is 1-2 minutes before 12 o'clock | Depresses CLOSE PB for 500 KV GROUP BUS BREAKER Section 1-9 (32X) when synchroscope is 1-2 minutes before 12 o'clock. Verifies 1-9 CLOSE PB is illuminated. Verifies load is rising (MW indicator on 2RP3, MW Recorder on 2RP5, or HMI panel). |
| 4.5.12.4 | Verify generator load rises to 40-60 MW within 15 seconds | Verifies generator load rises to 40-60 MW within 15 seconds. If not, raises SETTER <= 4% above REFERENCE and selects GO. |
| 4.5.12.5 | Select SYNCH POT OFF for 1-9 breaker | Depresses SYNCH POT OFF PB and verifies bezel illuminates. |
Key Decision Point:
Two discriminating elements in this JPM. First (Step 4.5.8): the applicant must recognize that INCOMING voltage is NOT 3-5 KV above RUNNING voltage (as-found both ~498-499 KV) and use the Voltage Regulator RAISE SETPT to increase INCOM KV to at least 501 KV — this satisfies one of the Synch Permissive requirements. Second (Step 4.5.12.1): the turbine is initially rotating too slowly (SETTER = 1801 rpm, producing slow FAST rotation). The applicant must increase the SETTER by 1-2 rpm increments and select SETTER GO to achieve a synchroscope rotation of approximately one revolution every 25-30 seconds in the FAST direction. Failing to satisfy either condition will prevent the MAIN GEN SYNC PERMISSIVE light from illuminating.
Two discriminating elements in this JPM. First (Step 4.5.8): the applicant must recognize that INCOMING voltage is NOT 3-5 KV above RUNNING voltage (as-found both ~498-499 KV) and use the Voltage Regulator RAISE SETPT to increase INCOM KV to at least 501 KV — this satisfies one of the Synch Permissive requirements. Second (Step 4.5.12.1): the turbine is initially rotating too slowly (SETTER = 1801 rpm, producing slow FAST rotation). The applicant must increase the SETTER by 1-2 rpm increments and select SETTER GO to achieve a synchroscope rotation of approximately one revolution every 25-30 seconds in the FAST direction. Failing to satisfy either condition will prevent the MAIN GEN SYNC PERMISSIVE light from illuminating.
Ref: S2.OP-SO.TRB-0001 (Rev 47) | Task: N0450040101 | K/A: 045 A4.02 — Ability to manually operate and/or monitor in the control room: Main Turbine Generator (2.7/2.6) | Source: Modified | View JPM PDF
Connections
- Related systems: Main Turbine, 500KV
- Related procedures: S2.OP-SO.TRB-0001 — Turbine-Generator Startup Operations, S2.OP-IO.ZZ-0003 — Hot Standby to Minimum Load
- Related exam: 2018 NRC Operating Exam