ENS 40098
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ENS Event | |
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09:34 Aug 22, 2003 | |
Title | |
Event Description | This ENS notification is made to report that on August 22, 2003 at 02:34 PDT Reactor Core Isolation Cooling was isolated due to the discovery of a degraded pilot cell in the Division 1 250 VDC battery. Operators isolated the steam inlet valve to the RCIC turbine (RCIC-V-1) because the minimum flow bypass valve, RCIC-V-19, (a primary containment isolation valve) was declared inoperable and isolated to comply with the plant TS. Isolation of RCIC-V-1 effectively removed RCIC from service since it is the containment isolation valve.
The event is considered reportable to the NRC under 10 CFR 50.72(b)(3)(v)(D) based on guidance contained in NUREG 1022, "Event Reporting Guidelines," and NRC Regulatory Issue Summary (RIS) 2001-14, "Position on Reportability Requirements for Reactor Core Isolation Cooling System Failure." A follow-up LER will be issued under 10 CFR 50.73(a)(2)(v)(D). The licensee will be notifying the NRC Resident Inspector. |
Where | |
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Columbia ![]() Washington (NRC Region 4) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
Time - Person (Reporting Time:+8.82 h0.368 days <br />0.0525 weeks <br />0.0121 months <br />) | |
Opened: | Jeff Gardiner 18:23 Aug 22, 2003 |
NRC Officer: | Mike Ripley |
Last Updated: | Aug 22, 2003 |
40098 - NRC Website
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Unit 2 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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