ENS 49959: Difference between revisions
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| event date = 02/06/2014 11:43 EDT | | event date = 02/06/2014 11:43 EDT | ||
| last update date = 03/26/2014 | | last update date = 03/26/2014 | ||
| title = Invalid Actuation | | title = Invalid Actuation of a Containment Isolation Signal | ||
| event text = This 60-day telephone notification is being made in accordance with 10 CFR 50.73(a)(2)(iv)(A) to provide information pertaining to the invalid actuation of a containment isolation signal. | | event text = This 60-day telephone notification is being made in accordance with 10 CFR 50.73(a)(2)(iv)(A) to provide information pertaining to the invalid actuation of a containment isolation signal. | ||
On February 6, 2014, at 1143 [EST], with the plant in Mode 6 and fuel moves in-progress, an invalid containment isolation actuation signal was generated that affected containment isolation valves in more than one system and caused both trains of the control room heating, ventilation and cooling systems to swap from normal to emergency mode of operation. For both occurrences, all necessary follow-up actions were taken in accordance with the abnormal operating procedure for a spurious containment isolation event. All equipment responded in accordance with the plant design. | On February 6, 2014, at 1143 [EST], with the plant in Mode 6 and fuel moves in-progress, an invalid containment isolation actuation signal was generated that affected containment isolation valves in more than one system and caused both trains of the control room heating, ventilation and cooling systems to swap from normal to emergency mode of operation. For both occurrences, all necessary follow-up actions were taken in accordance with the abnormal operating procedure for a spurious containment isolation event. All equipment responded in accordance with the plant design. |
Latest revision as of 21:51, 1 March 2018
Where | |
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Palisades ![]() Michigan (NRC Region 3) | |
Reporting | |
10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
Time - Person (Reporting Time:+1148.2 h47.842 days <br />6.835 weeks <br />1.573 months <br />) | |
Opened: | Terry Davis 10:55 Mar 26, 2014 |
NRC Officer: | Daniel Mills |
Last Updated: | Mar 26, 2014 |
49959 - NRC Website
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