JPM IP-k — Place 11 CVCS Monitor Tank in Recirculation IAW S1.OP-SO.WL-0001
In-Plant (RCA) | RO/SRO | 068 A2.02 (2.7/2.8)
Location: In-Plant — Unit 1 RCA
Time-Critical: No
Alternate Path: No
Estimated Time: 25 minutes
Initial Conditions:
- The 11 CVCS Monitor Tank is at 90% and processing for release is being performed.
Initiating Cue:
- You are the extra NCO.
- The CRS directs you to place 11 CVCS Monitor Tank in recirculation using section 5.1 of S1.OP-SO.WL-0001, Release of Radioactive Liquid Waste from 11 CVCS Monitor Tank.
- 11 Monitor Tank Pump will be placed in service.
Time-Critical: No
Alternate Path: No
Estimated Time: 25 minutes
Initial Conditions:
- The 11 CVCS Monitor Tank is at 90% and processing for release is being performed.
Initiating Cue:
- You are the extra NCO.
- The CRS directs you to place 11 CVCS Monitor Tank in recirculation using section 5.1 of S1.OP-SO.WL-0001, Release of Radioactive Liquid Waste from 11 CVCS Monitor Tank.
- 11 Monitor Tank Pump will be placed in service.
Task Standard:
1. Correctly performs recirculation valve lineup using Attachment 1 IAW S1.OP-SO.WL-0001
2. Correctly determines minimum recirculation time of 6 Hrs 30 Mins (band 6 Hrs 20 Mins to 6 Hrs 40 Mins)
1. Correctly performs recirculation valve lineup using Attachment 1 IAW S1.OP-SO.WL-0001
2. Correctly determines minimum recirculation time of 6 Hrs 30 Mins (band 6 Hrs 20 Mins to 6 Hrs 40 Mins)
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| NOTE | Any additions made to Monitor Tank that is isolated and placed on recirculation for sampling will invalidate sample analysis, requiring further recirculation time and additional sampling. | Operator reads note and continues. |
| 5.1.1 * | PLACE valves in "Recirc Position" IAW Attachment 1, Section 1.0 | Correctly locates and re-positions each valve IAW Attachment 1: 11WR27 MT PMP SUCT V — OPEN; 11WR31 MT PMP DISCH V — OPEN; 12WR27 MT PMP SUCT V — CLOSED; 12WR31 MT PMP DISCH V — CLOSED. |
| 5.1.2 | DIRECT second Operator to PERFORM Independent Verification IAW Attachment 1, Section 1.0 | Directs IV. CUE: IVs are complete. |
| 5.1.3 | PLACE LO-LEVEL CUT-OFF switch in TANK 11 position | Operator places LO-LEVEL CUT-OFF switch in the TANK 11 position. |
| 5.1.4 * | IF recirculating 11 CVCS MT with 11 MT Pump, THEN START 11 MT Pump | Operator starts 11 MT Pump by depressing start pushbutton. |
| 5.1.5 | IF recirculating 11 CVCS MT with 12 MT Pump, THEN START 12 MT Pump | Operator marks step as N/A (using 11 MT Pump per cue). |
| 5.1.6 * | THROTTLE 11WR53, MT RECIRC V, to maintain 80 psig on discharge of operating MT Pump | Throttles 11WR53 in the closed (clockwise) direction to raise discharge pressure from 40 psig to 80 psig. |
| 5.1.7 * | COMPLETE Attachment 1, Section 2.0 — determine tank volume and minimum recirculation time | Records current time as start time (A). Records tank level = 90%. Refers to S1.OP-TM.ZZ-0002 (CVCS Monitor Tank curve, Page 8) and determines tank volume = 19500 gallons (acceptable band 19000 to 20000). Calculates minimum recirculation time: (Volume x 3) / 150 gpm = 6 Hrs 30 Min (acceptable band: 6 Hrs 20 Min to 6 Hrs 40 Min). Adds time (B) to start time (A) for completion time. |
| 5.1.8 | DIRECT second Operator to PERFORM Independent Verification of calculations in Attachment 1, Section 2.0 | Directs IV of calculations. CUE: IV is complete. |
Key Decision Point:
Step 5.1.7 is the discriminating step — the applicant must correctly interpret the CVCS Monitor Tank capacity curve from S1.OP-TM.ZZ-0002 to convert 90% tank level to approximately 19500 gallons, then correctly apply the recirculation time formula: (Volume x 3) / 150 gpm. Incorrect curve reading or calculation error will yield a wrong minimum recirculation time. The formula requires multiplying volume by 3 (three tank volume turnovers) and dividing by the 150 gpm pump flow rate.
Step 5.1.7 is the discriminating step — the applicant must correctly interpret the CVCS Monitor Tank capacity curve from S1.OP-TM.ZZ-0002 to convert 90% tank level to approximately 19500 gallons, then correctly apply the recirculation time formula: (Volume x 3) / 150 gpm. Incorrect curve reading or calculation error will yield a wrong minimum recirculation time. The formula requires multiplying volume by 3 (three tank volume turnovers) and dividing by the 150 gpm pump flow rate.
Ref: S1.OP-SO.WL-0001 (R28) | Task: N0680010101 | K/A: 068 A2.02 — Ability to (a) predict the impacts of malfunctions or operations on the Liquid Radwaste System; and (b) use procedures to correct, control, or mitigate: Lack of tank recirculation prior to release | Source: New | View JPM PDF
Connections
- Related systems: Waste Liquid, CVCS
- Related procedures: S1.OP-SO.WL-0001 — Release of Radioactive Liquid Waste
- Related exam: 2020 NRC Operating Exam