ENS 40536
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ENS Event | |
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16:41 Feb 21, 2004 | |
Title | Rcic System Inoperable Due to Possible Undervoltage Relay Failure |
Event Description | This ENS notification is made to report that on February 21, 2004 at 0841 PST Reactor Core Isolation Cooling was rendered inoperable due to RCIC-V-13 (RPV injection valve) motor operator losing power. Preliminary investigation indicates the undervoltage relay may have failed, resulting in a loss of control power for the valve and loss of valve position indication.
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). This event placed the plant in technical specifications LCO 3.5.3 which has a 14 day duration. The licensee notified the NRC Resident Inspector. |
Where | |
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Columbia Generating Station ![]() 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:+-0.88 h-0.0367 days <br />-0.00524 weeks <br />-0.00121 months <br />) | |
Opened: | James Reddy 15:48 Feb 21, 2004 |
NRC Officer: | Steve Sandin |
Last Updated: | Feb 21, 2004 |
40536 - 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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