05000255/LER-1979-008, Forwards LER 79-008/03L-0

Forwards LER 79-008/03L-0

ML18043A494
Person / Time
Site:	Palisades
Issue date:	02/21/1979
From:	Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML18043A495	List: 05000255/LER-1979-008, Forwards LER 79-008/03L-0 05000255/LER-1979-008-03, /03L-0 on 790126: Tank Vent Valve (CV-3051) Opened Simultaneously w/N2 Fill Valve;Tank Pressure Dropped Below Tech Specs Limit. Caused by Electrical Short Between Wires for Fill & Vent Valves
References
NUDOCS 7902260464
Download: ML18043A494 (2)

LER-1979-008, Forwards LER 79-008/03L-0

Event date:
Report date:
2551979008R00 - NRC Website

text

consumers Power company

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General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201

• Area Code 517 788-0550 February 21, 1979 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 6ol37 DOCKET 50-255 - LICENSE DPR PALISADES PLANT - LER 79-008 On the reverse side is Licensee Event Report 79-008 which is reportable under Technical Specification 6.9.2.b.(2).

David P Hoffman (Signed)

David P Hoffman Assistant Nuclear Licensing Administrator

_ CC:

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

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Pe.lisa.des NRCFORM366 17;771 U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: I J (!)

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI 1

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9 LICENSEE CODE 14

,5 LICENSE NUMBER

~5 26 LICENSE TYPE 30 57 CAT 58 CON'T [fil]

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60 61 DOCKET NUMBER 6B 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES @

(())J I During an attempt ~o raise the pressure in safety injection tank T-82D, [nIJ 1 the tank vent valve (CV-3051) opened simultaneously with the N2 f'ill valve 1

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I causing the tank pressure to drop below the limit of' TS 3.3.lb.

The vent

())))I valve has been disabled to the 1 closed position in*order to permit use of'

((ill the N2 f'ill valve.

The low pressure condition lasted f'or i.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

[))Z} I No threat *to public health or sai'ety existed.

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8 9 BO SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE ISIFI@ ~@ L!J@ (VIAILIVIEIXI@ L!J@) ~@

B 10 11 12 13 18 19 20 [ill]

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SEQUENTIAL OCCURRENCE REPORT _ -

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LER/RO LVENT YEAR REPORT N~

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REPORT

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,o I j I L::'.J NUMBER 21 22 23 24 26 27 28 29 30 L=:I

. 31 REVISION*

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ATTACHMENT NPR~

TAKEN ACTION ON PLANT METHOD HOURS ~ SUBMITTED FORM SUB.

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33 34 35 36 37 40 41 42 CAUSE DESCRIPTION AND CORREC"rlVE ACTIONS {27)

PRIME COMP.

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43 COMPONENT MANUFACTURER M 11 12 I ol@

44 47 o:::I!J I Valve malfunction appears to have been caused by an electrical short betweTn 1IIIJ I the wires f'or the f'ill and vent valves f'or T-82D.

Both valves are on the IIJI1 1 same electrical scheme, and their wires share a common connector at the IIlIJ 1 containment electrical penetration.

OJ!] I f'ault will be located and corrected.

7 8 9 When plant conditions permit, the MErnfODOF

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. PTWER STATUS @

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10 12 13 44 ACTIVITY CONTENT t::i\\

RELEASED OF RELEASE I

AMOUNT OF ACTIVITY ~

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10 11 44 PERSONNEL EXPOSURES

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46 N/A LOCATION OF RE~EASE 80 BO IIDJ l ~u'tfj~@rzEl@DEsrrriroN 7

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~13~----------------------------~-------------------------------1 PERSONNEL INJURIES

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NUMBER DESCRIPTION~

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11 12 80 LOSS OF OR DAMAGE TO FACILITY 143' TYPE

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10 BO PUBLICITY

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NRC USE ONLY ISSUED/,;;\\ DESCRIPTION l1IIJ Ll!l~.__=N~A~~~~~~~~~~~~~~~~~~~---' I I I I I I I I I I I I I 7

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