JPM Sim-c — Control Rod System Surveillance
Sim | RO/SRO | 001 A2.11 (4.4/4.7)
Location: Simulator
Time-Critical: No
Alternate Path: Yes
Estimated Time: 15 minutes
Initial Conditions:
- Unit 2 is at 100% power BOL.
- No major equipment is out of service and no Tech Specs are active.
- The rod control system surveillance is in progress with the only remaining rod bank to test is Control Bank D.
Initiating Cue:
- You are the Reactor Operator.
- The CRS directs you to complete the rod control system surveillance IAW S2.OP-ST.RCS-0001, Reactivity Control System Rod Control Assemblies.
- A Maintenance Technician is stationed at the Rod Control Power Cabinets (Relay Room)
- CRS directs that 15 steps of rod insertion will be performed to ensure each rod moves at least 10 steps.
- Pre-Test D bank rod positions were recorded and attached with your Cue Sheet.
- Notify the CRS when the testing is complete.
- Your evaluator will take care of all alarms not related to your task.
Time-Critical: No
Alternate Path: Yes
Estimated Time: 15 minutes
Initial Conditions:
- Unit 2 is at 100% power BOL.
- No major equipment is out of service and no Tech Specs are active.
- The rod control system surveillance is in progress with the only remaining rod bank to test is Control Bank D.
Initiating Cue:
- You are the Reactor Operator.
- The CRS directs you to complete the rod control system surveillance IAW S2.OP-ST.RCS-0001, Reactivity Control System Rod Control Assemblies.
- A Maintenance Technician is stationed at the Rod Control Power Cabinets (Relay Room)
- CRS directs that 15 steps of rod insertion will be performed to ensure each rod moves at least 10 steps.
- Pre-Test D bank rod positions were recorded and attached with your Cue Sheet.
- Notify the CRS when the testing is complete.
- Your evaluator will take care of all alarms not related to your task.
Task Standard:
1. Correctly performs rod control surveillance using approved procedure. 2. Responds to continuous rod movement by manually tripping the reactor.
1. Correctly performs rod control surveillance using approved procedure. 2. Responds to continuous rod movement by manually tripping the reactor.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 5.1.10.A | Ensure Tavg within +/-1°F of Tref | Checks Tavg/Tref recorder on 2RP4 and determines Tavg is within +/-1°F of Tref. |
| 5.1.10.B * | Place Bank Selector Switch in CBD position | Rotates selector switch clockwise to the CBD position. |
| 5.1.10.C | Ensure GRP SELECT B lights illuminated on Power Cabinets | Contacts Maintenance Technician; reports GRP SELECT B lights illuminated on Cabinets 21BD and 22BD. |
| 5.1.10.D * | Maneuver Control Bank D at least 10 steps in one direction | Inserts Control Bank D 15 steps. |
| 5.1.10.E | Ensure each rod in CBD indicated movement of at least 10 steps | Monitors rod position on P-250 and determines D bank rods all moved at least 10 steps. |
| 5.1.10.F * | Record test results as SAT | Records test results as SAT using Acceptance Criteria in Attachment 1. |
| 5.1.10.G | Restore Control Bank D to pre-test position | Withdraws Bank D to previous position (ARO). |
| 5.1.11.C * | Place Bank Selector Switch in AUTO — recognize continuous rod insertion and manually trip the reactor | Determines Turbine Power is >15% and rotates selector switch to AUTO position. Announces rods are stepping in with no runback in progress. Places rod bank switch to Manual — rod motion has NOT stopped. Manually trips the reactor. |
Key Decision Point:
Step 5.1.11.C is the alternate path / discriminating step. After completing the CBD surveillance and restoring rods, the procedure directs placing the rod bank selector switch in AUTO (since Turbine Power is >15%). An uncontrolled rod insertion malfunction activates when the switch is placed in AUTO. The applicant must recognize that rods continue inserting even after placing the switch in Manual (the malfunction inserts rods in both AUTO and MANUAL), and manually trip the reactor. The operator may reference AB.ROD-0003 (Continuous Rod Motion) to support the decision to trip.
Step 5.1.11.C is the alternate path / discriminating step. After completing the CBD surveillance and restoring rods, the procedure directs placing the rod bank selector switch in AUTO (since Turbine Power is >15%). An uncontrolled rod insertion malfunction activates when the switch is placed in AUTO. The applicant must recognize that rods continue inserting even after placing the switch in Manual (the malfunction inserts rods in both AUTO and MANUAL), and manually trip the reactor. The operator may reference AB.ROD-0003 (Continuous Rod Motion) to support the decision to trip.
Ref: S2.OP-ST.RCS-0001 (R23), OP-AP-300-1001 | Task: N0010070101 | K/A: 001 A2.11 — Ability to predict impacts of situations requiring a reactor trip on CRDS and use procedures to mitigate | Source: Modified | View JPM PDF
Connections
- Related systems: Control Rod Drive
- Related procedures: S2.OP-ST.RCS-0001 — Rod Control Assemblies Surveillance, AB.ROD-0003 — Continuous Rod Motion, OP-AP-300-1001 — PWR Control Rod Movement Requirements
- Related exam: 2020 NRC Operating Exam