ML19318C080

LER-80-077/03L-0:on 800525,B Train RHR & B Train Containment Spray Pumps Were Inoperable Because Valve FCV-63-73 Failed to Open.Caused by Valve Failing to Actuate Interlock Limit Switch

ML19318C080
Person / Time
Site:	Sequoyah
Issue date:	06/24/1980
From:	Record D TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19318C075	List: ML19318C074 ML19318C080
References
LER-80-077-03L, LER-80-77-3L, NUDOCS 8006300523
Download: ML19318C080 (2)

Text

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EVENT DESCRi* TION AND PROS ASLE CONSEQUENCES O'o

! ITT71 i With unit 1 in Mode 4, FCV-63-73 would not oren during the performance [

g i of SI-166.3. - With 'th' sE ivalve" ~inoperablie, the B train RHR and B train l

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in p l l containment spray pumps are inoperable. This put us int'o the ' actions l ITTTl I of ? CO's 3. 5. 3 and 3.6.2.1. There was no danger'to the public health  !

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N.wc os Pnter in Daniel J. Record ,noys. 615-842-520A 8006800 5 2 3

Tenne:seo Valicy Authority Sequoych Nuclear Pitut

• . . s LER SUPPLEMENTAL INFORMATION SQRO-50-327/ 8077 Technical Specification Involved 3.5.3 & 3.6.2.1 Reported Under Technical Specification 6.9.1.13.b Date of Occurrence: 0510 5/25/80 Identification and' Description of Occurrence:

FCV-63-73 would not open during the performance of SI-166.3. RHR pump 1B-B and containment spray pump 1B-B are inoperable with this valve inoperable. .

Conditions Prior to Occurrence:

Unit 1 in Mode 4 Apparent Cause of Occurrence:

Failure of FCV-74-21 to make up its limit switch caused the interlock between FCV-63-73 and 74-21 to not be made up.

Analysis of Occurrence:

There was no danger to public health and safety.

Corrective Action:

Emergency maintenance request was written to correct the limit switch problems with FCV-74-21.

Failure Data:

Previous occurrences - none.

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