JPM IP-j — Start Up and Parallel a Rod Drive M-G Set
In-Plant | RO/SRO | 012 A4.07 (3.8)
Location: In-Plant — 84 ft. Elevation, Unit 1 Switchgear Room (no RCA entry required)
Time-Critical: No
Alternate Path: No
Estimated Time: 15 minutes
Initial Conditions:
- Salem Unit 1 is at 75% power.
- 12 Rod Drive M-G set is in service.
- 11 Rod Drive M-G Set tripped 3 days ago.
- Maintenance has completed repairs and is requesting 11 M-G set be placed in service.
Initiating Cue:
The CRS directs you to place 11 Rod Drive M-G set in service and parallel with 12 M-G set using Section 4.4 of S1.OP-SO.RCS-0001, Rod Control System Operation.
Time-Critical: No
Alternate Path: No
Estimated Time: 15 minutes
Initial Conditions:
- Salem Unit 1 is at 75% power.
- 12 Rod Drive M-G set is in service.
- 11 Rod Drive M-G Set tripped 3 days ago.
- Maintenance has completed repairs and is requesting 11 M-G set be placed in service.
Initiating Cue:
The CRS directs you to place 11 Rod Drive M-G set in service and parallel with 12 M-G set using Section 4.4 of S1.OP-SO.RCS-0001, Rod Control System Operation.
Task Standard:
The task is satisfactorily met when the applicant has started and paralleled 11 Rod Drive M-G set IAW S1.OP-SO-RCS-0001 section 4.4.
The task is satisfactorily met when the applicant has started and paralleled 11 Rod Drive M-G set IAW S1.OP-SO-RCS-0001 section 4.4.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 4.4.1 | ENSURE A AND B REACTOR TRIP BREAKERS are CLOSED; Running M-G Set GENERATOR LINE VOLTS is 260V (247V-273V) AND GENERATOR LINE AMPS is ~80 DC AMPS | Locates A AND B REACTOR TRIP BREAKERS and verifies CLOSED indication. Locates 12 Rod Drive M-G Set GENERATOR LINE VOLT AND GENERATOR LINE AMPS meters and checks readings. |
| 4.4.2 | ALIGN MG Set Controls for MG Set to be started IAW Attachment 1 | Verifies: Voltmeter selector switch on A-B, Voltage adjust in Vertical, Ammeter selector switch in A, Motor Breaker Control Switch target GREEN / breaker OPEN, Synchronize switch OFF, Generator Breaker Control Switch target GREEN / breaker OPEN. |
| 4.4.3 * | CLOSE MOTOR Breaker AND ALLOW at least 20 seconds for MG Set to reach rated speed | Simulates closing 11 M-G set breaker by rotating the MOTOR Breaker switch to CLOSE. |
| 4.4.4 * | PRESS AND HOLD GEN FIELD FLASH pushbutton UNTIL Generator voltage stops rising (~260V) | Simulates pressing and holding GEN FIELD FLASH pushbutton until Generator voltage stops rising. GENERATOR LINE VOLTS should indicate ~260V. |
| 4.4.5.1 | ADJUST VOLTAGE ADJUST full counterclockwise to LOW | Simulates adjusting VOLTAGE ADJUST full counterclockwise. GENERATOR LINE VOLTS should indicate ~220V. |
| 4.4.5.2 | ADJUST VOLTAGE ADJUST full clockwise to HIGH | Simulates adjusting VOLTAGE ADJUST full clockwise. GENERATOR LINE VOLTS should indicate ~300V. |
| 4.4.5.3 | ADJUST VOLTAGE ADJUST UNTIL GENERATOR LINE VOLTS indicates ~260V | Simulates adjusting VOLTAGE ADJUST counterclockwise until GENERATOR LINE VOLTS indicates ~260V. |
| 4.4.5.4 | Direct Maintenance to obtain voltage reading on Running MG Set using DMM at back of installed voltmeter | Directs Maintenance to obtain DMM voltage reading. DMM readings will be less (by ~1/2) than installed voltmeter readings. |
| 4.4.5.5 | Direct Maintenance to monitor voltage reading on In-coming MG Set using DMM at back of installed voltmeter | Directs Maintenance to monitor voltage reading on In-coming MG Set. |
| 4.4.5.6 * | ADJUST VOLTAGE ADJUST UNTIL DMM voltage is 0-2.5 volts higher than the reading obtained in Step 4.4.5.4 | Simulates adjusting VOLTAGE ADJUST in the CLOCKWISE direction until DMM reads 0-2.5V higher than running set (130V). Must adjust incoming M-G set voltage ABOVE the running set voltage before paralleling. |
| 4.4.5.7 | DIRECT Maintenance to REMOVE DMM AND CLOSE panel doors | Directs Maintenance to remove DMM and close panel doors. |
| 4.4.6 * | PLACE MG Set SYNCHRONIZE Switch to ON, AND OBSERVE Generator Breaker automatically closes and load divides equally (~40 DC Amps each) | If required, simulates moving Synchronize Switch from 12 MG set and inserting into 11 MG set, then places in ON. Generator breaker auto-closes and load stabilizes at 40 amps on each generator. CAUTION: Do NOT manually close generator output breaker — could trip both M-G Sets. |
| 4.4.7 | PLACE MG Set SYNCHRONIZE Switch to OFF | Simulates rotating the SYNCHRONIZE Switch to the OFF position. |
Key Decision Point:
Steps 4.4.5.6 and 4.4.6 are the discriminating steps — the applicant must adjust the incoming M-G set voltage 0-2.5V higher than the running set using DMM readings (CLOCKWISE to raise), then place the SYNCHRONIZE switch to ON to auto-close the generator breaker. The single synchronize handle must be moved from the 12 M-G set to the 11 M-G set. Manually closing the generator output breaker could trip both M-G sets.
Steps 4.4.5.6 and 4.4.6 are the discriminating steps — the applicant must adjust the incoming M-G set voltage 0-2.5V higher than the running set using DMM readings (CLOCKWISE to raise), then place the SYNCHRONIZE switch to ON to auto-close the generator breaker. The single synchronize handle must be moved from the 12 M-G set to the 11 M-G set. Manually closing the generator output breaker could trip both M-G sets.
Ref: S1.OP-SO.RCS-0001 (R36) | Task: N0015010104 | K/A: 012 A4.07 — Ability to manually operate and/or monitor in the control room: M/G set breakers | Source: Bank | View JPM PDF
Connections
- Related systems: RCS, RPS/SSPS
- Related procedures: S1.OP-SO.RCS-0001 — Rod Control System Operation
- Related exam: 2023 NRC Operating Exam