JPM RO-A2 — Channel Check of Reactor Coolant Temperatures
Admin | RO/SRO | G2.1.18 (3.6)
Location: Classroom
Time-Critical: No
Alternate Path: No
Estimated Time: 5 minutes
Initial Conditions:
- Salem Unit 2 is at 100% reactor power.
- Control room log readings IAW S2.OP-DL.ZZ-0003, Control Room Log (Modes 1-4), is in progress.
Initiating Cue:
- You are the Reactor Operator.
- PERFORM the 1830 log readings using the control room log sheet provided.
- 2CC1 Console Readings for OTDT Setpoint are:
- NOTIFY the CRS when log readings are complete.
Time-Critical: No
Alternate Path: No
Estimated Time: 5 minutes
Initial Conditions:
- Salem Unit 2 is at 100% reactor power.
- Control room log readings IAW S2.OP-DL.ZZ-0003, Control Room Log (Modes 1-4), is in progress.
Initiating Cue:
- You are the Reactor Operator.
- PERFORM the 1830 log readings using the control room log sheet provided.
- 2CC1 Console Readings for OTDT Setpoint are:
| RC Loop | OTDT (deg F) |
|---|---|
| 21 (TI411C) | 74 |
| 22 (TI421C) | 78 |
| 23 (TI431C) | 75 |
| 24 (TI441C) | 72 |
- NOTIFY the CRS when log readings are complete.
Task Standard:
1. Completes the 1830 log readings for 21 thru 24 OTDT Setpoints and Tavg Channel Checks.
2. Determines 24 Loop OTDT Setpoint is UNSAT.
1. Completes the 1830 log readings for 21 thru 24 OTDT Setpoints and Tavg Channel Checks.
2. Determines 24 Loop OTDT Setpoint is UNSAT.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| CUE | RC Loop Average Temperature Channel Check | Tavg temps provided on log sheet: Loop 21 = 573.2 F, Loop 22 = 575.2 F, Loop 23 = 574.5 F, Loop 24 = 574.8 F. |
| Tavg * | 21-24 AVE TEMP CHANNEL CHECK — IF all 4 loop average temperatures are within 3 degrees F, THEN RECORD "SAT" | Operator determines all Tavg temps within 3 degrees F (max spread: 575.2 - 573.2 = 2.0 F) and records "SAT". S/R 4.3.2.1.1 applicable in Modes 1, 2, and 3. |
| OTDT 21 * | RECORD console OTDT indication for Loop 21. Must be within REM OTDT Setpoint Band. | Records OTDT setpoint on log sheet. Evaluates using REM FIGURE 5A and determines 21 Loop OTDT setpoint is within the OTDT setpoint band. |
| OTDT 22 * | RECORD console OTDT indication for Loop 22. Must be within REM OTDT Setpoint Band. | Records OTDT setpoint on log sheet. Evaluates using REM FIGURE 5B and determines 22 Loop OTDT setpoint is within the OTDT setpoint band. |
| OTDT 23 * | RECORD console OTDT indication for Loop 23. Must be within REM OTDT Setpoint Band. | Records OTDT setpoint on log sheet. Evaluates using REM FIGURE 5C and determines 23 Loop OTDT setpoint is within the OTDT setpoint band. |
| OTDT 24 * | RECORD console OTDT indication for Loop 24. Must be within REM OTDT Setpoint Band. | Records OTDT setpoint on log sheet. Evaluates using REM FIGURE 5D and determines 24 Loop OTDT setpoint is NOT within the OTDT setpoint band. Informs CRS that Loop 24 OTDT setpoint is outside the REM setpoint band. |
Key Decision Point:
The OTDT 24 step is the discriminating step. All four loops' OTDT console readings must be compared against the REM Reactor Engineering Manual FIGURE 5 (A-D) setpoint bands. Loops 21, 22, and 23 are within their respective bands. Loop 24 OTDT setpoint of 72 deg F is outside the REM FIGURE 5D setpoint band — the applicant must recognize this, record it as UNSAT (or red-circle it), and notify the CRS. The Tavg Channel Check is SAT (all within 3 deg F), but the OTDT check fails on Loop 24.
The OTDT 24 step is the discriminating step. All four loops' OTDT console readings must be compared against the REM Reactor Engineering Manual FIGURE 5 (A-D) setpoint bands. Loops 21, 22, and 23 are within their respective bands. Loop 24 OTDT setpoint of 72 deg F is outside the REM FIGURE 5D setpoint band — the applicant must recognize this, record it as UNSAT (or red-circle it), and notify the CRS. The Tavg Channel Check is SAT (all within 3 deg F), but the OTDT check fails on Loop 24.
Ref: S2.OP-DL.ZZ-0003 (Rev 109), Salem 2 Cycle 23 REM (Rev 17) | Task: S302000115 | K/A: G2.1.18 — Ability to make accurate, clear, and concise logs, records, status boards, and reports | Source: New | View JPM PDF
Connections
- Related systems: RCS
- Related procedures: S2.OP-DL.ZZ-0003 — Control Room Logs
- Related tech specs: TS 3/4.3 — Instrumentation, TS 3/4.4 — Reactor Coolant System
- Related exam: 2018 NRC Operating Exam