JPM Sim-a — Perform Control Rod System Surveillance
Sim | RO | 001 A2.11 (4.4/4.7)
Location: Simulator
Time-Critical: No
Alternate Path: Yes
Estimated Time: 10 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. All sections are complete, except for exercising 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.
- 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: 10 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. All sections are complete, except for exercising 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.
- Notify the CRS when the testing is complete.
- Your evaluator will take care of all alarms not related to your task.
Task Standard:
Exercises Control Bank D at least 10 steps and upon completion of the test recognizes unexpected continuous rod movement requiring a manual reactor trip.
Exercises Control Bank D at least 10 steps and upon completion of the test recognizes unexpected continuous rod movement requiring a manual reactor trip.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 4.1.10.1 | Ensure Tavg is within +/-1F of Tref | Checks Tave/Tref recorder on 2RP4 and determines Tavg is within +/-1F of Tref. |
| 4.1.10.2 * | Place Bank Selector Switch in CBD position | Rotates selector switch clockwise to the CBD position. |
| 4.1.10.3 | Ensure GRP SELECT B lights illuminated on Cabinets 21BD and 22BD | Contacts Maintenance Technician at Power Cabinets. Technician reports GRP SELECT B lights are illuminated. |
| 4.1.10.4-5 | Insert/Withdraw Control Bank D 1 step (repeat 3 times) | Inserts one step, withdraws one step. Repeated three times consecutively. |
| 4.1.10.6 * | Maneuver Control Bank D at least 10 steps in one direction | Inserts Control Bank D 15 steps. |
| 4.1.10.7 | 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. |
| 4.1.10.8 * | Record test results as SAT | Records test results as SAT using Acceptance Criteria in Attachment 1, Rod Control Assembly Data. |
| 4.1.10.9 * | Restore Control Bank D to pre-test position | Withdraws Bank D to previous position (ARO). |
| 4.1.11.3 * | Place Bank Selector Switch in AUTO — recognize unexpected 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 4.1.11.3 is the alternate path / discriminating step. After placing the rod bank selector switch in AUTO, an uncontrolled rod insertion malfunction activates (rods insert in both AUTO and MANUAL). The applicant must recognize that rods continue inserting even after placing the switch in Manual, and manually trip the reactor. The operator may reference S2.OP-AB.ROD-0003, Continuous Rod Motion, to confirm the action.
Step 4.1.11.3 is the alternate path / discriminating step. After placing the rod bank selector switch in AUTO, an uncontrolled rod insertion malfunction activates (rods insert in both AUTO and MANUAL). The applicant must recognize that rods continue inserting even after placing the switch in Manual, and manually trip the reactor. The operator may reference S2.OP-AB.ROD-0003, Continuous Rod Motion, to confirm the action.
Ref: S2.OP-ST.RCS-0001 (Rev 25) | Task: 50638 | K/A: 001 A2.11 — Ability to predict the impacts of continuous rod insertion/withdrawal on reactor power (4.4/4.7) | Safety Fn: 1 | Source: Bank | View JPM PDF
Connections
- Related procedures: S2.OP-ST.RCS-0001 — Rod Control Assemblies Surveillance, AB.ROD-0003 — Continuous Rod Motion
- Related systems: Control Rod Drive
- Related exam: 2022 NRC Operating Exam