ENS 53003
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ENS Event | |
|---|---|
23:45 Oct 6, 2017 | |
| Title | Loss Of Control Room Habitability Envelope |
| Event Description | On October 6, 2017 at 1945 EDT, a loss of Control Room Habitability Envelope (CRE) was declared due to failing to meet the requirements of SR 3.7.3.4 during 72 month surveillance testing. Measured in-leakage exceeded the SR acceptance value.
The CRE is required to be maintained such that occupants can control the reactor safely under normal conditions and maintain it in a safe condition following a radiological event, hazardous chemical release, or a smoke challenge. The station remains in compliance with Technical Specification required action statements. This event is being reported under 10 CFR 50.72(b)(3)(v)(D) and per the guidance of NUREG 1022, Rev. 3, Section 3.2.7 as a loss of a Safety Function. There is no redundant Susquehanna Control Room Habitability Envelope. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Susquehanna  Pennsylvania (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| LER: | 05000387/LER-2017-006 |
| Time - Person (Reporting Time:+-1.98 h-0.0825 days <br />-0.0118 weeks <br />-0.00271 months <br />) | |
| Opened: | Steve Koch 21:46 Oct 6, 2017 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Oct 6, 2017 |
| 53003 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
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