05000271/LER-1981-012-03, /03L-0:on 810512,shock Suppressor on Main Steam D Piping Found W/No Visible Fluid in Site Glass Resulting in Failure to Lock Up within Procedural Tolerance When Tested in as-found Condition.Cause Not Determined

/03L-0:on 810512,shock Suppressor on Main Steam D Piping Found W/No Visible Fluid in Site Glass Resulting in Failure to Lock Up within Procedural Tolerance When Tested in as-found Condition.Cause Not Determined

ML20004E954
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	06/10/1981
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20004E949	List: 05000271/LER-1981-012, Forwards LER 81-012/03L-0 05000271/LER-1981-012-03, /03L-0:on 810512,shock Suppressor on Main Steam D Piping Found W/No Visible Fluid in Site Glass Resulting in Failure to Lock Up within Procedural Tolerance When Tested in as-found Condition.Cause Not Determined
References
LER-81-012-03L, LER-81-12-3L, NUDOCS 8106160232
Download: ML20004E954 (1)

LER-1981-012, /03L-0:on 810512,shock Suppressor on Main Steam D Piping Found W/No Visible Fluid in Site Glass Resulting in Failure to Lock Up within Procedural Tolerance When Tested in as-found Condition.Cause Not Determined

Event date:
Report date:
2711981012R03 - NRC Website

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8 60 61 DOCKET NUMBER 68 69 EVENT OATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROB A8LE CONSEQUENCES h I o 121 l During a visual inspection, shock suppressor MS-32 on Main Steam "D" piping was l

l O l a l l found with no visible fluid in its sight glass and subsequently failed to lock-up l

l 014 I I within procedural tolerance when functionally tested in the as-found condition.

1 Ioisl I Since MS-32 was returned to service prior to startup cnd due to the lack of a seis-l 10is1Imic ovnne roaufrine it to function. no consecuences, adverse to nublic health and l

I O i i l i saf e ty resulted. Previous occurrences were reported as LER 80-08 and LER 77-24.

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I i 101 l Functional testing did not reveal the cause of leakage. Upon disassembly, no ob-I W l vious seal deeradation was observed though some evidence of snubber fluid leakane I

iii2i 1 appeared in the rod seal area during the visual inspection. Snubber MS-32 was I

l'I3II completely rebuilt and functionally tested prior to rainstallation. MS-32 is a l

Ii I A 1 l 2 1/2" Grinnel Figure 200 Shock Suppressor.

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NAME GF PREDAP5R PHONE:

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