ENS 42882
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ENS Event | |
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05:51 Oct 7, 2006 | |
Title | Scaffold Prevents Main Steam Isolation Valve Closure |
Event Description | Temporary scaffolding was constructed near the loop-1 Main Steam Isolation Valve (MSIV) on 8/30/2006 while the Unit was in Mode 1. On 10/7/2006 surveillance testing on the MSIVs was conducted in Mode 3 and the loop-1 MSIV failed to fully stroke closed. It was determined that temporary scaffolding was interfering with full valve travel. The scaffolding was removed and the surveillance test verified full valve motion.
The licensee notified the NRC Resident Inspector and will notify state and local officials. |
Where | |
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Millstone ![]() Connecticut (NRC Region 1) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
Time - Person (Reporting Time:+-2.03 h-0.0846 days <br />-0.0121 weeks <br />-0.00278 months <br />) | |
Opened: | Janet Novak 03:49 Oct 7, 2006 |
NRC Officer: | Mark Abramovitz |
Last Updated: | Oct 7, 2006 |
42882 - NRC Website
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Unit 2 | |
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Reactor critical | Not Critical |
Scram | No |
Before | Hot Standby (0 %) |
After | Hot Standby (0 %) |
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