JPM IP-k — Perform a Radioactive Liquid Release
In-Plant | RO/SRO | 068 A2.04 (3.3/3.3)
Location: In-Plant (RCA) — 64 ft Elevation Aux Bldg, Gas Stripper Feed Pump Room, CVCS MT Room, 104 Panel area
Time-Critical: No
Alternate Path: No
Estimated Time: 20 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 curie content of the tank.
- 2R18 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.
Time-Critical: No
Alternate Path: No
Estimated Time: 20 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 curie content of the tank.
- 2R18 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.
Task Standard:
Controls the discharge of 21 CVCS MT to less than the Maximum Release rate.
Controls the discharge of 21 CVCS MT to less than the Maximum Release rate.
▶ 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 * | OPEN 2WR59, MT PMPS OB STOP VALVE | Locates 2WR59 and simulates opening valve by turning hand wheel counterclockwise. Location: Gas Stripper Feed Pump Room, 64 ft El. Aux Bldg. |
| 5.5.5 | DIRECT second Operator to PERFORM Independent Verification of 2WR59 position | IV has been performed. |
| 5.5.6 * | THROTTLE 21WR53, MT RECIRC STOP VALVE, to obtain Maximum Release Rate | With 2WR59 fully open, 2FR1064 reads 5 gpm (below 45 gpm max). Throttles 21WR53 CLOSED (clockwise) to raise flow. 2FR1064 reads 50 gpm (exceeds 45 gpm limit). Adjusts 21WR53 OPEN (counterclockwise) to lower flow to 40 gpm (below 45 gpm max). Location: CVCS MT Room, 64 ft El. Aux Bldg. Note: 21WR53 is approximately 7 feet above floor level. |
| 5.5.7 | RECORD time, date, and tank identification on 2FR1064 recorder | Simulates annotating recorder with time, date, and tank. |
| 5.5.8 * | COMPLETE Attachment 2, Section 5.1 — Initial Release Data | Records: 21 CVCS MT Level (2LIS-180) = 90%. Volume from S2.OP-TM.ZZ-0002 = 19500 gallons (acceptable: 19200-19800). Dilution Flow Rate = 200000 gpm (all Unit 1 CW pumps in service: 2 circulators x 100000). Discharge Flow Rate (2FR1064) = 40 gpm. 2R18 reads 105 cpm with High Radiation light illuminated. |
| 5.5.9 * | 2R18 Monitor ALARMS — DIRECT NCO to CLOSE 2WL51 | 2R18 High Radiation light illuminated (105 cpm). Operator identifies alarm condition from Step 5.5.9 criteria ("2R18 Monitor ALARMS"). Simulates calling control room to report 2R18 is in ALARM and DIRECTS NCO to CLOSE 2WL51, LIQUID RELEASE STOP VALVE. JPM terminates when NCO reports 2WL51 is CLOSED. |
Key Decision Point:
Two key discriminating elements in this JPM. First, at Step 5.5.6, the operator must correctly control the discharge flow rate below the 45 gpm maximum by throttling 21WR53. With 2WR59 fully open, initial flow is only 5 gpm. Closing 21WR53 diverts more flow to the overboard path, raising discharge flow. The operator must check 2FR1064 and adjust until flow is below 45 gpm. The Caution before Step 5.5.6 warns that completely closing 21WR53 will NOT provide sufficient recirculation to protect the pump if 2WL51 isolates on high radiation alarm. Second, at Step 5.5.8/5.5.9, the 2R18 radiation monitor reads 105 cpm with the High Radiation light illuminated. The operator must recognize this is an alarm condition requiring immediate termination of the release by directing the NCO to close 2WL51.
Two key discriminating elements in this JPM. First, at Step 5.5.6, the operator must correctly control the discharge flow rate below the 45 gpm maximum by throttling 21WR53. With 2WR59 fully open, initial flow is only 5 gpm. Closing 21WR53 diverts more flow to the overboard path, raising discharge flow. The operator must check 2FR1064 and adjust until flow is below 45 gpm. The Caution before Step 5.5.6 warns that completely closing 21WR53 will NOT provide sufficient recirculation to protect the pump if 2WL51 isolates on high radiation alarm. Second, at Step 5.5.8/5.5.9, the 2R18 radiation monitor reads 105 cpm with the High Radiation light illuminated. The operator must recognize this is an alarm condition requiring immediate termination of the release by directing the NCO to close 2WL51.
Ref: S2.OP-SO.WL-0001 (R28), S2.OP-TM.ZZ-0002 (R8) | Task: N0685140104 | K/A: 068 A2.04 — Ability to (a) predict the impacts of Liquid Radwaste System malfunctions and (b) based on those predictions, use procedures to correct, control, or mitigate the consequences | Source: Bank | View JPM PDF
Connections
- Related systems: Waste Liquid, Radiation Monitoring
- Related procedures: S2.OP-SO.WL-0001 — Release of Radioactive Liquid Waste, S2.OP-TM.ZZ-0002 — Tank Capacity Data
- Related exam: 2018 NRC Operating Exam