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Exams > 2019 JPM Sim-h — Respond to CCW Leak Inside Containment

2019 JPM Sim-h — Respond to CCW Leak Inside Containment

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JPM Sim-h — Respond to CCW Leak Inside Containment IAW S2.OP-AB.CC-0001 Simulator | RO/SRO | 008 A2.02 (3.2/3.5)
Location: Simulator
Time-Critical: No
Alternate Path: Yes
Estimated Time: 8 minutes

Initial Conditions:
- Unit 2 at 100% power, MOL.
- No equipment is out of service and no active Tech Specs are in effect.

Initiating Cue:
- You are the Reactor Operator.
- Respond to all alarms and indications.
Task Standard:
1. Opens 2DR107 to makeup to CCW surge tank.
2. TRIPs the Reactor, Stops RCPs, and Closes CNTMT CCW valves IAW Attachment 2.
▶ Show Critical Steps & Key Actions
Step Critical Element Standard
CUE OHA C-2 CNTMT SUMP PMP START received, followed by CCW Console Window Alarm for SURGE TANK LEVEL HI-LO Operator reports receipt of unexpected OHA C-2 and shortly thereafter console alarm for CCW Surge Tank Level Hi-Lo. Refers to OHA ARP and/or 2CC1 ARP.
ARP 3.1 MONITOR CC Surge Tank Level on 2LI-628A and C on Bezel Operator monitors Surge Tank Level and observes lowering.
ARP 3.3.A * OPEN 2DR107, Surge Tank Makeup Operator opens 2DR107. Reports CCW Surge Tank Level is rising.
ARP 3.3.B GO TO S2.OP-AB.CC-0001, Component Cooling Abnormality Operator transitions to AB.CC-0001.
3.1 INITIATE Attachment 1, GAS Operator reviews Attachment 1 GAS and determines none are applicable at this time.
3.2 Is CCW Surge Tank Level > 58% and rising? NO: Operator determines CCW Surge Tank Level is NOT rising above 58% and goes to Step 3.13.
3.13 Is CCW Surge Tank level < 42% and dropping? YES: Operator determines CCW Surge Tank level is < 42% and dropping. INITIATE makeup to CCW Surge Tank (OPEN 2DR107 if not already performed).
3.15-3.19 Locate leak — determine leak is in containment (OHA C-2 received) CRS dispatches operators. Operator checks recorders on 2RP1 back panel — 22 WHUT level is rising. Determines CCW leak is in containment.
3.21 ISOLATE CCW to the Excess Letdown HX — ENSURE 2CV132 CLOSED, 2CC215 CLOSED, 2CC113 CLOSED Operator determines 2CV132 and 2CC215 are already CLOSED. Depresses CLOSED PB for 2CC113 (Exc LHX Outlet).
3.24 * IF CC Surge Tank level indication can NOT be maintained >5%, THEN STOP RCPs IAW Attachment 2 — Operator determines leak exceeds makeup capability with 2DR107 open AND lowering CCW Surge Tank level ALTERNATE PATH: CCW leak worsens beyond makeup capacity. Operator recognizes that Surge Tank level cannot be maintained and transitions to Attachment 2 (Stopping RCPs and Isolating CCW to Containment).
Att 2 * TRIP the Reactor using either Rx Trip pistol grip switches Operator TRIPs the Reactor. Confirms Reactor is Tripped.
Att 2 * STOP ALL RCPs Operator STOPs ALL RCPs.
Att 2 1.D * CLOSE CNTMT CCW isolation valves: 2CC131 (RCP Therm Bar CC Cont W), 2CC136 (RCP CLG OIL CLR Outlet), 2CC190 Operator closes all listed CCW containment isolation valves by depressing CLOSED PB for each valve and verifying CLOSED PB illuminates.
Att 2 GO TO 2-EOP-TRIP-1 Reactor Trip or Safety Injection JPM is complete when 2CC190 is CLOSED.
Key Decision Point:
Step 3.24 is the discriminating step (alternate path) — after the initial CCW leak is managed with 2DR107 makeup, the leak worsens and exceeds makeup capacity. The operator must recognize that CCW Surge Tank level cannot be maintained above 5% and transition to Attachment 2. In Attachment 2, the operator must trip the reactor, stop ALL RCPs, and close the CCW containment isolation valves (2CC131, 2CC136, 2CC190). The operator who enters AB.CC-0001 early may also take the GAS action to trip the Rx and stop RCPs before reaching step 3.24.
Ref: S2.OP-AB.CC-0001 (R16) | Task: N1140080401 | K/A: 008 A2.02 — Ability to (a) predict the impacts of the following on the Component Cooling Water System and (b) based on those predictions, use procedures to correct, control, or mitigate the consequences of: CCW System leakage | Source: Modified | View JPM PDF

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