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procedures > S2.OP-SO.WL-0001 — Release of Radioactive Liquid Waste

S2.OP-SO.WL-0001 — Release of Radioactive Liquid Waste

⚠️ DRAFT

S2.OP-SO.WL-0001 — Release of Radioactive Liquid Waste

Purpose

Provides direction for release of radioactive liquid waste from Unit 2 CVCS Monitor Tanks.

Key Actions / Information

Exam — 2020 Q72
Direct release of 21 CVCS Monitor Tank to Circulating Water System per S2.OP-SO.WL-0001(Q): requires rotation of a potentially contaminated spectacle flange outside the RCA, necessitating Radiation Protection support. Other evolutions (hydrogen recombiner, gas decay tank release, containment pressure relief) are controlled from the control room area and do NOT require RP support.
Exam — 2023 Q68
Loss of discharge flow (2FR1064 failing low) does NOT automatically close the 2WL51 overboard valve. Loss of flow is not a design feature associated with the 2R18 process radiation monitor. Per ODCM Action 29 for an inoperable liquid radwaste effluent line flow recorder, the release may continue provided effluent flow is estimated once per 4 hours.
JPM — 2022 IP-k
Section 5.5 — Release of 21 CVCS MT via SW to CW: flow control uses 2WR59 (MT PMPS OB STOP VALVE, Gas Stripper Feed Pump Room, 64 ft. El.) and 21WR53 (MT RECIRC V, CVCS MT Room, 64 ft. El., ~7 ft. above floor). Caution: completely closing 21WR53 will NOT provide sufficient recirculation to protect the pump should 2WL51 isolate on high rad alarm. Step 5.5.8 records: 2LIS-180 (tank level), tank volume from S2.OP-TM.ZZ-0002, dilution flow rate, 2FR1064 discharge flow, and 2R18 monitor reading. Step 5.5.9: if 2R18 ALARMS, direct NCO to CLOSE 2WL51.
Exam — 2020 Q90
If 2R18 is inoperable (e.g., detector fails LOW), per steps 2.3, 3.4, and 3.5: 2FR1064 must remain OPERABLE — the release procedure prevents both R18 and FR1064 from being inoperable simultaneously. To continue the release with R18 inoperable: verify FR1064 OPERABLE AND perform two independent samples, independent release calculations, and independent discharge valve lineups. Trap: ODCM 3.3.3.8 action b allows flow rate estimation if FR1064 alone is inoperable, but the release procedure is more restrictive — if R18 is inoperable, FR1064 MUST be operable.
Exam — 2019 Q43
21 CVCS MT release path is via SW to CW (not SW only). Per Step 5.5.8, 2FR1064 (RADWASTE OVERBOARD DISCH FLOW RECORDER) is required to be OPERABLE during the release. If 2FR1064 becomes inoperable, the crew IS required to stop the release. Trap: the candidate could confuse the 2FR1064 requirement with the 2R18 requirement — both instruments are required, but the actions differ. Loss of 2FR1064 requires stopping the release.
Exam — 2018 Q99
If 2R18 (Waste Disposal Liquid Rad Monitor) is inoperable (e.g., failed source check), the CRS CAN approve the release permit provided a second sample was drawn, analyzed, and calculations were second verified prior to the release. Trap: continuous effluent sampling during discharge is NOT the compensatory action — the second sample verification happens PRIOR to the release. Also, 2R18 does NOT have to be repaired before the release can proceed.
JPM — 2018 IP-k
Release of 21 CVCS MT via SW to CW (Section 5.5): with Maximum Release Rate 45 gpm (high curie content). Step 5.5.4: OPEN 2WR59 (MT PMPS OB STOP VALVE) in Gas Stripper Feed Pump Room. Step 5.5.6: THROTTLE 21WR53 (MT RECIRC STOP VALVE) to adjust discharge flow — closing 21WR53 diverts more flow to overboard path (raises discharge flow). Caution: completely closing 21WR53 provides insufficient recirculation if 2WL51 isolates on high rad. Step 5.5.8: initial data includes tank volume from S2.OP-TM.ZZ-0002 (19500 gal at 90%), dilution flow = 200000 gpm (2 CW circulators). Step 5.5.9: 2R18 alarms at 105 cpm → CLOSE 2WL51.

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