ENS 41181: Difference between revisions
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StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
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| event date = 09/28/2004 13:02 CDT | | event date = 09/28/2004 13:02 CDT | ||
| last update date = 11/08/2004 | | last update date = 11/08/2004 | ||
| title = Invalid Primary Containment Isolation System Actuation | | title = Invalid Primary Containment Isolation System Actuation from Loss-Of-Power to Reactor Protection System (Rps) Bus 2A | ||
| event text = This 60-day telephone notification is being made under reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) to describe an invalid actuation of general containment isolation signals affecting more than one system. | | event text = This 60-day telephone notification is being made under reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) to describe an invalid actuation of general containment isolation signals affecting more than one system. | ||
On September 28, 2004, with Unit 2 operating at 100% thermal power, at 1302 hours CDT during maintenance work associated with protective relaying on 480 VAC Shutdown Board 2A, the board was inadvertently tripped. Associated RPS motor-generator (MG) set 2A lost power, and RPS bus 2A, which is powered from this MG set, was de-energized. Primary Containment Isolation System (PCIS) logic circuits powered from this bus lost power, and PCIS logic Groups 2, 3, 6, and 8 were actuated. | On September 28, 2004, with Unit 2 operating at 100% thermal power, at 1302 hours CDT during maintenance work associated with protective relaying on 480 VAC Shutdown Board 2A, the board was inadvertently tripped. Associated RPS motor-generator (MG) set 2A lost power, and RPS bus 2A, which is powered from this MG set, was de-energized. Primary Containment Isolation System (PCIS) logic circuits powered from this bus lost power, and PCIS logic Groups 2, 3, 6, and 8 were actuated. | ||
Latest revision as of 21:22, 1 March 2018
| Where | |
|---|---|
Browns Ferry  Alabama (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+976.05 h40.669 days <br />5.81 weeks <br />1.337 months <br />) | |
| Opened: | Don Smith 11:05 Nov 8, 2004 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Nov 8, 2004 |
| 41181 - NRC Website
| |
| 60-Day Optional Telephonic Notification of an Invalid Actuation of a General Containment Isolation Signal Affecting More than One System | 60-Day Optional Telephonic Notification of an Invalid Specified System Actuation [Table view] | ||