ENS 42976
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ENS Event | |
|---|---|
04:54 Nov 9, 2006 | |
| Title | Failure of Control Room Hvac to Maintain Control Room Temperature |
| Event Description | At 22:54 hours on November 8, 2006, the B Control Room HVAC Refrigeration and Condensing Unit (RCU) failed to maintain proper Control Room temperature and cycling excessively. The RCU is a single train system and therefore is reportable per 10CFR50.72(b)(3)(v)(D). The RCU is required to operate during a design basis accident to maintain Main Control Room habitability/temperature. The Air Filtration Unit (AFU) of CREVS remains operable. This places unit 2 in a 30 day LCORA per Tech Spec 3.7.5 Required Action A.1.
The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Dresden  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+-0.35 h-0.0146 days <br />-0.00208 weeks <br />-4.7943e-4 months <br />) | |
| Opened: | Bruce Franzen 04:33 Nov 9, 2006 |
| NRC Officer: | Mike Ripley |
| Last Updated: | Nov 9, 2006 |
| 42976 - NRC Website | |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (85 %) |
| After | Power Operation (85 %) |
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