ML17339A403

LER 79-034/03L-0:on 791105,during Power Operation,Auxiliary Feedwater Pumps Tested & Pump a Failed to Start.Caused by Misalignment Between Connections to Associated Pneumatic Controller Resulting in Inoperability of Valve CV-3705

ML17339A403
Person / Time
Site:	Turkey Point
Issue date:	12/05/1979
From:	Schoppman M FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17339A402	List: ML17339A401 ML17339A403
References
LER-79-034-03L, LER-79-34-3L, NUDOCS 7912190522
Download: ML17339A403 (3)

Text

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~02 Durin o ation, the AHT, s were bein tested in accordance

~os with TS 4.10.1. The "A" AFh faz1ed to start. The B and C "A" AHp pung was-tested and returned to service within 29 minutes. This 9 is the first failure of this ion have been reported ho%<ever, this %%as the first occurrence attributed to the cause described belofa in the Cause Description.

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LICiBlSEE EVENT REPOBT PAGE Dv'0 Additional Cause Descri on and Corrective Actions:

1 The failure of the."A" AHJ pump to start resulted fran inoperability of CV-3705 ("A" AEN steam turbine pressure control valve). We root cause of this inoperability was a misalignment between the manifold plugs of the pneumat.c controU.er manifold assenbly and its naunting base assembly due to loose mounting screws. The misalignment was a randan event.

Existing preventive maintenance and AHV system periodic testing will provide assurance that a reoccurrence of this type of event will be promptly detected.

nent Data:

Bailey I~wter Co.

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Pneumatic Controller AD