ENS 53699: Difference between revisions
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| event date = 10/28/2018 00:00 EDT | | event date = 10/28/2018 00:00 EDT | ||
| last update date = 10/28/2018 | | last update date = 10/28/2018 | ||
| title = | | title = Non Essential Service Water Inoperable | ||
| event text = | | event text = During the performance of Service Water Essential header swap, SWN-6 (Supply to Turbine Building Oil Coolers) valve stem became disconnected from its gear box at 85% open and could not be operated. Therefore, the non-essential service water system was inoperable. LCO 3.0.3 was entered at 0930 [EDT] with required actions to be in Mode 3 in 7 hours, Mode 4 in 13 hours and Mode 5 in 37 hours. Repair efforts were successful at shutting SWN-6, and LCO 3.0.3 was exited at 1305 [EDT] before adding any negative reactivity in support of shutdown. ('TS Required S/D' box not checked.) | ||
This condition constituted a loss of safety function which requires an 8 hour report [in accordance with] IAW 50.72(b)(3)(v)(B): Without the ability to close SWN-6, the non-seismic portion of the conventional Service Water System could not be isolated as required in the event of either a seismic event or as required in the EOPs. The nonessential service water system is required to support the recirculation phase post [Design Basis Accident] DBA for accident mitigation. | |||
The licensee notified the NRC Resident Inspector and the State of New York. | |||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20181029en.html#en53699 | | URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20181029en.html#en53699 | ||
}}{{unit info | }}{{unit info | ||
Latest revision as of 13:17, 30 October 2018
| Where | |
|---|---|
Indian 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 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat | |
| Time - Person (Reporting Time:+11.17 h0.465 days <br />0.0665 weeks <br />0.0153 months <br />) | |
| Opened: | Michael Weeden 15:10 Oct 28, 2018 |
| NRC Officer: | Karen Cotton |
| Last Updated: | Oct 28, 2018 |
| 53699 - NRC Website
| |
Indian Point with 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |