05000255/LER-1979-009, Forwards LER 79-009/01X-1

Forwards LER 79-009/01X-1

ML18043A658
Person / Time
Site:	Palisades
Issue date:	05/07/1979
From:	Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML18043A659	List: 05000255/LER-1979-009, Forwards LER 79-009/01X-1 05000255/LER-1979-009-01, /01X-1 on 790220:design Review Indicated Butterfly Valves May Not Close Under Accident Conditions.Caused by Vague Purchase Specs Which Did Not Include Requirements for Closing Against Pressure
References
NUDOCS 7905100249
Download: ML18043A658 (2)

LER-1979-009, Forwards LER 79-009/01X-1

Event date:
Report date:
2551979009R00 - NRC Website

text

consumers Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201

• Area Code 517 788-0550 May 7, 1979 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255 - LICENSE DPR PALIS ADES PLANT - LICENSEE EVENT REPORT 79 Revision 1 On the reverse side is Revision 1 to Licensee Event Report 79-09 which was reportable under Technical Specification 6. 9. 2. a. (9).

David P Hoffman (Signed)

David P Hoffman Assistant Nuclear Licensing Administrator CC:

Director, Office of Nuclear Reactor Regulation Director, Office of Inspection and Enforcement

UPDATE :REPORT:

PREVIOUS REPORT DATE -

03/06/79

.~

PALISADES NRC FORM366 (7*77)

U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: I 1 G)

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

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B IMIIIPI PJLlllG)IOI 0101010101010101010101411111111101 I 10 9

LICENSEE COOE 14

,5 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE BO EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

!During a design review of the containment building purge valves, it was

[)))) I determined that the 48-inch and 12-inch butterfly valves may not close

~

1 against a dp of greater than 2 psid or 1. 75 psid, re_specti vely.

As a

[)))) I result, the valves may not be capable of closing under all postulated

[§))] 1accident conditions.

(The containment isolation signal occurs at 5.0 psig~t

~!Event reportable per TS 6.9.2.a.(9).

This event had no adverse effect

[§))] 1upon the public health or safety.

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B 9 BO [ill]

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SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE ISi Al@ L!J@ L.!J@ IVIAIL1V1E1x1e w@ uu@

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CODE TYPE NO.

REPORT I

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I.....-1 I 0 I 1 I L!J I I UJ NUMBER 21 22 23 24 26 27 28 29 30 31 32 TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM SUB.

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rr::m !The purchase specifications for these valves (Fisher-Continental Model 1JJJ] 19220 48-inch and 12-inch butterfly valves) did not include requirements

[)))) 1for closing against pressure.

Administrative controls will be used to OJ)) I maintain the valves closed whenever PCS temperature is greater than 210 1JJ)) !degrees F.

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STATUS

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RELEASED OF RELEASE AMOUNT OF ACTIVITY ~

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TYPE

DESCRIPTION

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