ENS 49029
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ENS Event | |
|---|---|
16:15 May 14, 2013 | |
| Title | High Steam Flow Isolation Capability Identified As Non-Functional |
| Event Description | Emergency Cooling Loop 11 High Steam Flow Isolation capability not functional due to inadequate water level in differential pressure transmitter reference legs.
Emergency Cooling Loop 11 High Steam Flow transmitter for channel 11 alarmed due to gross failure at 0840 hours0.00972 days <br />0.233 hours <br />0.00139 weeks <br />3.1962e-4 months <br /> [EDT] on May 14, 2013. At 1154 hours0.0134 days <br />0.321 hours <br />0.00191 weeks <br />4.39097e-4 months <br /> channel 12 Emergency Cooling Loop 11 High Steam Flow transmitter experienced a gross failure. With both transmitters failed, the isolation capability of Emergency Condenser Loop 11 on high steam flow is not available. At 1215 hours0.0141 days <br />0.338 hours <br />0.00201 weeks <br />4.623075e-4 months <br />, a manual isolation of Emergency Cooling Loop 11 was initiated fulfilling the safety function. Subsequent troubleshooting has revealed that the reference legs of the differential pressure transmitters for high steam flow were not filled properly. This is an 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> notification per 10 CFR 50.72(b)(3)(v) for a condition could have prevented the mitigation of the consequences of an accident. The licensee notified the NRC Resident Inspector and will notify the State of New York. |
| Where | |
|---|---|
Nine Mile Point  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| LER: | 05000220/LER-2013-001 |
| Time - Person (Reporting Time:+1.08 h0.045 days <br />0.00643 weeks <br />0.00148 months <br />) | |
| Opened: | Daniel Coleman 17:20 May 14, 2013 |
| NRC Officer: | Pete Snyder |
| Last Updated: | May 14, 2013 |
| 49029 - NRC Website
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Nine Mile Point with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
WEEKMONTHYEARENS 546922020-05-03T21:50:0003 May 2020 21:50:00
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