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Exams > 2023 JPM Sim-g — Respond to a Failed High RCS T-avg Channel IAW S2.OP-AB.ROD-0003

2023 JPM Sim-g — Respond to a Failed High RCS T-avg Channel IAW S2.OP-AB.ROD-0003

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JPM Sim-g — Respond to a Failed High RCS T-avg Channel IAW S2.OP-AB.ROD-0003 Sim | RO/SRO | A4.05 (3.8)
Location: Simulator
Time-Critical: No
Alternate Path: No
Estimated Time: 6 minutes

Initial Conditions:
- Salem Unit 2 is at 100%
- 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:
The task is satisfactorily met when the applicant has taken the Rod control system to manual IAW step 3.1 of S2.OP-AB.ROD-0003, restored Tavg IAW step 3.5 of S2.OP-AB.ROD-0003, stabilized PZR level and defeated the failed Tavg channel IAW step 3.10 thru 3.12 of S2.OP-AB.ROD-0003.
▶ Show Critical Steps & Key Actions
Step Critical Element Standard
N/A * Recognize unwarranted rod motion and take rods to manual Verifies no runback in progress and takes rods to manual.
3.1 Enter S2.OP-AB.ROD-0003 and place rod bank selector switch in Manual Enters AB.ROD-0003 and places the rod control bank selector switch in Manual.
3.2 Did rod motion stop? YES — continues to step 3.4.
3.4 Monitor Tavg for necessary adjustments Initials and monitors Tavg until the cause of the transient is known and the plant is stable.
3.5 * Adjust rods in manual to control Tavg within 1.5F of Tprogram Verifies Tavg within 1.5F and continues, or adjusts by withdrawing rods to within 1.5F of Tprogram (Attachment 1, Tavg Program vs % Reactor Power).
3.6 Has a NIS channel failed high? NO — goes to step 3.8.
3.8 Stop any dilution of the Reactor Coolant System Verifies makeup system out of service and states no dilution in progress.
3.9 Has a Tavg channel failed high? YES — goes to step 3.10.
3.10 Return PZR level to program Places Master Flow Controller (or CV55) in manual and adjusts to restore level to program band.
3.11 * Select DEVIATION DEFEAT for affected loop — Reactor Coolant Differential Temperatures Selects deviation defeat on 2CC2 for channel 1 Differential Temperature.
3.11 * (cont'd) Select DEVIATION DEFEAT for affected loop — Reactor Coolant Average Temperatures Selects deviation defeat on 2CC2 for channel 1 Average Temperature.
3.12 * Select a valid channel on recorder — Reactor Coolant Differential Temperatures Selects recorder to Channel 2, 3, or 4 for Differential Temperature.
3.12 * (cont'd) Select a valid channel on recorder — Reactor Coolant Average Temperatures Selects recorder to Channel 2, 3, or 4 for Average Temperature.
3.13 When PZR level restored to program, return Charging System Master Flow Controller to AUTO Verifies level is at program and returns charging master flow controller to Auto.
3.14 Are control rods above Rod Insertion Limits? Verifies rods are above insertion limits.
3.16 If manual rod control is NOT required, place Rod Control System in automatic control CRS directs rods restored to auto control. Places rod control in Auto.
Key Decision Point:
The discriminating area spans steps 3.5 through 3.12 — the applicant must recognize the Tavg channel failed high (Loop 21 Hot Leg RTD), take rods to manual, restore Tavg to within 1.5F of Tprogram by withdrawing rods, stabilize PZR level, defeat the deviation alarms for both Differential Temperature and Average Temperature on 2CC2, and select a valid recorder channel for both parameters.
Ref: S2.OP-AB.ROD-0003 (R23) | Task: N1150090501 | System: 012 Reactor Protection System | K/A: A4.05 — Ability to manually operate and/or monitor in the control room: Channel defeat controls | Source: New | View JPM PDF

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