ENS 46687
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ENS Event | |
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03:36 Mar 20, 2011 | |
Title | High Pressure Core Spray Valve Breaker Overcurrent Trip Setpoint Out of Tolerance |
Event Description | During testing of the High Pressure Core Spray [HPCS] system minimum flow valve breaker, it was discovered that the overcurrent trip setpoint was out of tolerance. This testing was being performed as a result of a breaker trip that occurred during a surveillance. The discovery occurred while the system was inoperable for maintenance and no TS [Technical Specification] limits or action times were exceeded.
The overcurrent trip setpoint was placed within tolerance and HPCS is in operable status. The licensee notified the NRC Resident Inspector. |
Where | |
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Grand Gulf Mississippi (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:+3.53 h0.147 days <br />0.021 weeks <br />0.00484 months <br />) | |
Opened: | Ricky Liddell 07:08 Mar 20, 2011 |
NRC Officer: | Vince Klco |
Last Updated: | Mar 20, 2011 |
46687 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (96 %) |
After | Power Operation (96 %) |
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