ENS 52557
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ENS Event | |
|---|---|
16:52 Feb 16, 2017 | |
| Title | Hpci System Inoperable Due to Blown Fuse |
| Event Description | On February 16, 2017 at 1052 CST, Unit 2 received a High Pressure Coolant Injection (HPCI) System 120V Power Failure alarm. Troubleshooting identified a cleared fuse for the HPCI System Flow Controller, 2-FIC-73-33, which would have prevented automatic or manual HPCI System initiation and rendered the HPCI System inoperable. At 1145 CST, the cleared fuse was replaced and the HPCI system was declared available. The HPCI System remains inoperable for additional troubleshooting.
This constitutes an unplanned HPCI System inoperability and requires an 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> ENS notification in accordance with 10 CFR 50.72(b)(3)(v)(D), due to the failure of a single train system affecting accident mitigation and a 60 day written report in accordance with 10 CFR 50.73(a)(2)(v)(D). The Senior NRC Resident Inspector has been notified. |
| Where | |
|---|---|
| Browns Ferry Alabama (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+-0.92 h-0.0383 days <br />-0.00548 weeks <br />-0.00126 months <br />) | |
| Opened: | Mark Moebes 15:57 Feb 16, 2017 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Feb 16, 2017 |
| 52557 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (77 %) |
| After | Power Operation (77 %) |
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