ENS 40952
ENS Event | |
|---|---|
15:25 Aug 14, 2004 | |
| Title | |
| Event Description | During underwater inspection of the Standby Service Water 'C' system, four piping supports were found with considerable degradation. As a result, the Standby Service Water 'C' and High Pressure Core Spray systems were declared inoperable per Technical Specifications (TS). High Pressure Core Spray is a single - train system that performs a safety function."
The licensee entered the applicable sections of TS 3.7.2, High Pressure Core Spray Service Water System, and TS 3.5.1, High Pressure Core Spray. The licensee has notified the NRC Resident Inspector.
Reactor Plant Event Number 40952 was reported on August 14, 2004 at 1344 for an inoperable Standby Service Water 'C' and High Pressure Core Spray system due to degraded Standby Service Water 'C' lateral piping supports. This event is hereby retracted. The retraction is based on engineering evaluations and calculations performed that determined that the Standby Service Water 'C' and High Pressure Core Spray System were both OPERABLE and capable of performing their intended safety function. The engineering evaluation and calculations concluded that even without the degraded lateral piping supports, the Standby Service Water 'C' piping maintained its structural integrity and would have performed its intended safety function. The licensee notified the NRC Resident Inspector. Notified R4DO (W. Jones). |
| Where | |
|---|---|
| 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:+-0.68 h-0.0283 days <br />-0.00405 weeks <br />-9.31464e-4 months <br />) | |
| Opened: | Brian Blanche 14:44 Aug 14, 2004 |
| NRC Officer: | Gerry Waig |
| Last Updated: | Sep 2, 2004 |
| 40952 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |