JPM IP-k — Perform a Radioactive Liquid Release
In-Plant | RO/SRO | 068 A4.03 (3.9/3.8)
Location: In-Plant — 64 ft. Elevation Aux Bldg (RCA), Gas Stripper Feed Pump Room, CVCS MT Room, 104 Panel area
Time-Critical: No
Alternate Path: No
Estimated Time: 25 minutes
Initial Conditions:
- Preparations for a release of 21 CVCS Monitor Tank via Unit 2 SW system to Unit 1 CW system is in progress IAW S2.OP-SO.WL-0001, RELEASE OF RADIOACTIVE LIQUID WASTE FROM 21 CVCS MONITOR TANK.
- Chemistry has granted permission to release 21 CVCS MT at a Maximum Release Rate of 45 gpm due to the high activity (Curie) content of the tank.
- 2R18 Radiation Monitor AND 2FR1064 Flow Recorder are both OPERABLE.
- All Unit 1 CW pumps are in service.
Initiating Cue:
- You are the extra NCO.
- The CRS directs you to release 21 CVCS MT IAW Section 5.5 of S2.OP-SO.WL-0001.
- The Maximum Release Rate and Release Path are recorded on Attachment 2, Section 2.2 of the procedure.
Time-Critical: No
Alternate Path: No
Estimated Time: 25 minutes
Initial Conditions:
- Preparations for a release of 21 CVCS Monitor Tank via Unit 2 SW system to Unit 1 CW system is in progress IAW S2.OP-SO.WL-0001, RELEASE OF RADIOACTIVE LIQUID WASTE FROM 21 CVCS MONITOR TANK.
- Chemistry has granted permission to release 21 CVCS MT at a Maximum Release Rate of 45 gpm due to the high activity (Curie) content of the tank.
- 2R18 Radiation Monitor AND 2FR1064 Flow Recorder are both OPERABLE.
- All Unit 1 CW pumps are in service.
Initiating Cue:
- You are the extra NCO.
- The CRS directs you to release 21 CVCS MT IAW Section 5.5 of S2.OP-SO.WL-0001.
- The Maximum Release Rate and Release Path are recorded on Attachment 2, Section 2.2 of the procedure.
Task Standard:
1. Controls the discharge of 21 CVCS MT to less than the Maximum Release rate of 45 gpm.
2. Notifies control room to close 2WL51 following high alarm on the 2R18 radiation monitor.
1. Controls the discharge of 21 CVCS MT to less than the Maximum Release rate of 45 gpm.
2. Notifies control room to close 2WL51 following high alarm on the 2R18 radiation monitor.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 5.5.1 | IF 2FR1064, RADWASTE OVERBOARD DISCH FLOW RECORDER is INOPERABLE, THEN INITIATE Attachment 4, Section 4.0 | Marks step N/A; 2FR1064 is OPERABLE. |
| 5.5.2 * | DIRECT Unit 2 NCO to OPEN 2WL51, LIQUID RELEASE STOP VALVE | Operator simulates calling control room and DIRECTS Unit 2 NCO to OPEN 2WL51. |
| 5.5.3 | DIRECT second Operator to PERFORM Independent Verification of 2WL51 position in Attachment 2 | IV has been performed. |
| 5.5.4 * | THROTTLE OPEN 2WR59, MT PMPS OB STOP VALVE, to obtain less than or equal to Maximum Release Rate recorded in Attachment 2, Step 2.2.2 | Operator locates 2WR59 (Gas Stripper Feed Pump Room, 64 ft. El. Aux Bldg) and simulates opening valve by turning hand wheel counterclockwise. 2FR1064 reads 5 gpm with 2WR59 full open. |
| 5.5.5 | DIRECT second Operator to PERFORM Independent Verification of 2WR59 position in Attachment 2 | IV has been performed. |
| Caution | Completely closing 21WR53 will NOT provide sufficient recirculation to protect the pump should 2WL51 isolate due to high radiation alarm | Operator reads Caution and continues. |
| 5.5.6 * | IF Maximum Release Rate NOT obtained with 2WR59 fully open, THEN THROTTLE 21WR53, MT RECIRC V, to obtain less than or equal to Maximum Release Rate (CVCS MT Room, 64 ft. El. Aux Bldg, 21WR53 is about 7 feet above the floor) | Operator locates 21WR53 and simulates throttling valve CLOSED (clockwise) to raise discharge flow. Flow initially reads 50 gpm (exceeds 45 gpm max). Operator then OPENS 21WR53 (counterclockwise) to lower flow to 40 gpm (below 45 gpm limit). |
| 5.5.7 | IF 2FR1064 flow monitor is OPERABLE, THEN RECORD time, date, and tank identification on recorder | Operator simulates annotating recorder with time, date, and tank. |
| 5.5.8 | COMPLETE Attachment 2, Section 5.1 — 21 CVCS MT Release Initial Data: 21 CVCS MT Level (2LIS180), Tank Volume from S2.OP-TM.ZZ-0002, Dilution Flow Rate, Discharge Flow Rate (2FR1064), 2R18 Monitor Reading | Records: 2LIS-180 indicates 90%. Tank volume 19500 gallons (acceptable 19200-19800). Dilution Water Flowrate 200000 gpm (all CW pumps in service, 2 circulators x 100000). Discharge flow 40 gpm. 2R18 reads 105 counts per minute and 2R18 High Radiation light is illuminated. |
| 5.5.9 * | IF any of the following occur during release, THEN DIRECT NCO to CLOSE 2WL51, LIQUID RELEASE STOP VALVE: - LOSS of dilution water flow - 2FR1064 becomes inoperable - 2R18 Monitor ALARMS - MT Pump pressure falls below MDP allowed IAW Attachment 4 |
Operator recognizes 2R18 is in ALARM (High Radiation light illuminated, 105 CPM) and simulates calling the main control room to report 2R18 is in ALARM and DIRECTS the NCO to CLOSE 2WL51. |
Key Decision Point:
Step 5.5.6 tests whether the applicant understands the relationship between 2WR59 (overboard stop valve) and 21WR53 (recirculation valve) for controlling release rate. With 2WR59 fully open and flow only at 5 gpm, throttling 21WR53 CLOSED diverts more flow overboard, but can exceed the 45 gpm max release rate (flow initially reads 50 gpm). The applicant must then OPEN 21WR53 to bring flow back below 45 gpm. Step 5.5.9 is the alternate path trigger — the applicant must recognize that the 2R18 High Radiation alarm (105 CPM with high radiation light illuminated) requires immediately directing the NCO to close 2WL51 to terminate the release.
Step 5.5.6 tests whether the applicant understands the relationship between 2WR59 (overboard stop valve) and 21WR53 (recirculation valve) for controlling release rate. With 2WR59 fully open and flow only at 5 gpm, throttling 21WR53 CLOSED diverts more flow overboard, but can exceed the 45 gpm max release rate (flow initially reads 50 gpm). The applicant must then OPEN 21WR53 to bring flow back below 45 gpm. Step 5.5.9 is the alternate path trigger — the applicant must recognize that the 2R18 High Radiation alarm (105 CPM with high radiation light illuminated) requires immediately directing the NCO to close 2WL51 to terminate the release.
Ref: S2.OP-SO.WL-0001 (R28) | Task: N0685140104 | K/A: 068 A4.03 — Ability to manually operate and/or monitor in the control room: Liquid radwaste system | Source: Modified | View JPM PDF
Connections
- Related systems: Waste Liquid, Radiation Monitoring
- Related procedures: S2.OP-SO.WL-0001 — Release of Radioactive Liquid Waste
- Related exam: 2022 NRC Operating Exam