ENS 48114
ENS Event | |
|---|---|
16:20 Jul 17, 2012 | |
| Title | Control Room Emergency Ventilation Ac System Inoperable |
| Event Description | On July 17, 2012, at 1120 hours0.013 days <br />0.311 hours <br />0.00185 weeks <br />4.2616e-4 months <br /> the Control Room Emergency Ventilation Air Conditioning (CREV AC) system was declared inoperable due to a cooling water leak from the condenser on the Refrigeration Compressor Unit (RCU). The leakage originates from an apparent gasket leak at a bolted connection on the condenser. As a result, Technical Specification 3.7.5, Condition A, was entered. A repair plan and schedule is being developed.
The CREV AC system maintains a habitable control room environment and ensures the operability of components in the control room emergency zone during accident conditions. This notification is being made in accordance with 10 CFR 50.72(b)(3)(v)(D) because the CREV system is a single train system, and loss of the CREV AC could impact the plant's ability to mitigate the consequences of an accident. The licensee has notified the NRC Resident Inspector.
The licensee is retracting this report based on the following: The purpose of this notification is to retract the ENS Report made on July 17, 2012, at 1120 hours0.013 days <br />0.311 hours <br />0.00185 weeks <br />4.2616e-4 months <br /> (ENS Report # 48114). Further evaluation performed by Quad Cities Station confirms the CREV AC system would have performed its safety function. Based on this subsequent evaluation, ENS Report # 48114 is being retracted. Note: On July 18, 2012, the CREV AC system was successfully repaired and CREV AC system was returned to Operable status. The licensee informed the NRC Resident Inspector. Notified R3DO (Giessner). |
| Where | |
|---|---|
Quad Cities  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:+1.27 h0.0529 days <br />0.00756 weeks <br />0.00174 months <br />) | |
| Opened: | Fred Swihart 17:36 Jul 17, 2012 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Sep 10, 2012 |
| 48114 - 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 %) |