JPM RO-A2 — Perform Borated Water Source Surveillance
Admin | RO/SRO | G2.2.37 (3.6)
Location: Classroom
Time-Critical: No
Alternate Path: No
Estimated Time: 10 minutes
Initial Conditions:
- Salem Unit 2 is at 100% power.
- 21 BAT pump developed a leak that went unnoticed until the cross-connected BASTs reached their low level alarm setpoint.
- 21 BAT pump and the leak are isolated. BAST levels are stable.
- 21 BAST level: 48.0%
- 22 BAST level: 48.0%
- 21 BAST temp: 100 F
- 22 BAST temp: 98.1 F
- RWST temperature: 70 F
- RWST levels are: CH II = 41.4, CH III = 41.4, CH IV = 41.4
- Chemistry reports current RWST and BAST boron concentrations are:
- 21 BAST: 6650 ppm
- 22 BAST: 6650 ppm
- RWST: 2350 ppm
Initiating Cue:
- You are the Reactor Operator.
- Perform S2.OP-ST.CVC-0010, Borated Water Sources.
- All Prerequisites are completed SAT.
- Based on the Test Results is the surveillance SAT or UNSAT? (circle one)
Time-Critical: No
Alternate Path: No
Estimated Time: 10 minutes
Initial Conditions:
- Salem Unit 2 is at 100% power.
- 21 BAT pump developed a leak that went unnoticed until the cross-connected BASTs reached their low level alarm setpoint.
- 21 BAT pump and the leak are isolated. BAST levels are stable.
- 21 BAST level: 48.0%
- 22 BAST level: 48.0%
- 21 BAST temp: 100 F
- 22 BAST temp: 98.1 F
- RWST temperature: 70 F
- RWST levels are: CH II = 41.4, CH III = 41.4, CH IV = 41.4
- Chemistry reports current RWST and BAST boron concentrations are:
- 21 BAST: 6650 ppm
- 22 BAST: 6650 ppm
- RWST: 2350 ppm
Initiating Cue:
- You are the Reactor Operator.
- Perform S2.OP-ST.CVC-0010, Borated Water Sources.
- All Prerequisites are completed SAT.
- Based on the Test Results is the surveillance SAT or UNSAT? (circle one)
Task Standard:
Correctly completes Attachment 2 of S2.OP-ST.CVC-0010 and determines Test Results for combined BAST Volume is UNSAT.
Correctly completes Attachment 2 of S2.OP-ST.CVC-0010 and determines Test Results for combined BAST Volume is UNSAT.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 3.0 | Read and initial Precautions and Limitations | Operator reads and initials steps |
| Att 2 * | Record RWST level and verify acceptance criteria | Records RWST level from initial cue sheet. Determines Test Results is SAT (364500 to 400000 gals / 40.5 ft to 41.9 ft) |
| Att 2 * | Record RWST temperature and verify acceptance criteria | Records 70 F. Determines Test Results is SAT (≥35 F) |
| Att 2 * | Record RWST boron concentration and verify acceptance criteria | Records 2350 ppm. Determines Test Results is SAT (≥2300 and ≤2500 ppm) |
| Att 2 * | Record combined BAST volume and verify against TS 3.1.2.6 Figure 3.1-2 | Calculates combined BAST level of 96% (48% + 48%). Using Figure 3.1-2, determines required BAST level is >96.5%. Test Results is UNSAT (96% < 96.5% required). |
| Att 2 * | Record BAST temperature and verify acceptance criteria | Records temperatures (100 F and 98.1 F). Determines Test Results is SAT (≥63 F) |
| Att 2 * | Record BAST boron concentration and verify against TS 3.1.2.6 Figure 3.1-2 | Records 6650 ppm for both BASTs. Using current BAST level of 96% and Figure 3.1-2, determines required concentration is >6650 ppm (~6675 ppm). Test Results is UNSAT (6650 ppm < ~6675 ppm required). |
| 5.3 * | Determine overall surveillance result | Determines surveillance is UNSAT based on BAST volume and concentration results |
Key Decision Point:
The discriminating steps are the BAST volume and concentration checks using TS 3.1.2.6 Figure 3.1-2. The combined BAST level is 96% (48% + 48%), and the applicant must use the figure to determine that the required level at the given boron concentration is >96.5% — making the volume UNSAT by a very narrow margin. Similarly, the boron concentration of 6650 ppm is right at the border of the required concentration from Figure 3.1-2, which shows ~6675 ppm required at 96% level — also UNSAT. The narrow margins are designed to test whether the applicant can correctly read the figure and compare values precisely rather than rounding favorably.
The discriminating steps are the BAST volume and concentration checks using TS 3.1.2.6 Figure 3.1-2. The combined BAST level is 96% (48% + 48%), and the applicant must use the figure to determine that the required level at the given boron concentration is >96.5% — making the volume UNSAT by a very narrow margin. Similarly, the boron concentration of 6650 ppm is right at the border of the required concentration from Figure 3.1-2, which shows ~6675 ppm required at 96% level — also UNSAT. The narrow margins are designed to test whether the applicant can correctly read the figure and compare values precisely rather than rounding favorably.
Ref: S2.OP-ST.CVC-0010 (Rev 10) | Task: N0040420201 | K/A: G2.2.37 — Ability to determine operability and/or availability of safety related equipment | Source: New (Rev 01) | View JPM PDF
Connections
- Related systems: CVCS
- Related procedures: S2.OP-ST.CVC-0010 — Borated Water Sources, S2.OP-TM.ZZ-0002 — Tank Capacity Data
- Related tech specs: TS 3/4.1.2 — Boration Systems
- Related exam: 2019 NRC Operating Exam