ENS 55907
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ENS Event | |
|---|---|
09:55 May 23, 2022 | |
| Title | Secondary Containment Pressure Exceeded Technical Specification Requirement |
| Event Description | The following information was provided by the licensee via email:
On May 23, 2022, at 0455 CST, Cooper Nuclear Station experienced a spike in Secondary Containment differential pressure which exceeded the Technical Specifications Surveillance Requirements 3.6.4.1.1 limit of -0.25 inches of water gauge. Secondary Containment differential pressure restored to Technical Specification limits within two minutes and further investigation is ongoing. This unplanned Secondary Containment inoperability constitutes a condition reportable under 10CFR50.72(b)(3)(v)(C) and (D). The NRC Senior Resident Inspector has been informed. |
| Where | |
|---|---|
| Cooper Nebraska (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| LER: | 05000298/LER-2022-001 Secondary Containment Differential Pressure Perturbation Exceeds Technical Specifications Limit |
| Time - Person (Reporting Time:+1.47 h0.0613 days <br />0.00875 weeks <br />0.00201 months <br />) | |
| Opened: | Matt Jacobson 11:23 May 23, 2022 |
| NRC Officer: | Brian Lin |
| Last Updated: | May 23, 2022 |
| 55907 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
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