05000259/LER-1980-014-03, /03L-0:on 800126,during Refueling Outage,While Performing EMI-50,scram Accumulator Level Switch LS-1-85-34 for Control Rod Driveline 26-27 Would Not Give Annunciation for High Accumulator Level.Caused by Broken Reed Switch

/03L-0:on 800126,during Refueling Outage,While Performing EMI-50,scram Accumulator Level Switch LS-1-85-34 for Control Rod Driveline 26-27 Would Not Give Annunciation for High Accumulator Level.Caused by Broken Reed Switch

ML19296D180
Person / Time
Site:	Browns Ferry
Issue date:	02/25/1980
From:	Norris J TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19296D176	List: 05000259/LER-1980-014, Forwards LER 80-014/03L-0 05000259/LER-1980-014-03, /03L-0:on 800126,during Refueling Outage,While Performing EMI-50,scram Accumulator Level Switch LS-1-85-34 for Control Rod Driveline 26-27 Would Not Give Annunciation for High Accumulator Level.Caused by Broken Reed Switch
References
LER-80-014-03L, LER-80-14-3L, NUDOCS 8002290447
Download: ML19296D180 (2)

LER-1980-014, /03L-0:on 800126,during Refueling Outage,While Performing EMI-50,scram Accumulator Level Switch LS-1-85-34 for Control Rod Driveline 26-27 Would Not Give Annunciation for High Accumulator Level.Caused by Broken Reed Switch

Event date:
Report date:
2591980014R03 - NRC Website

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(,1 t 'v E N T D A T E 74 73 REPQHT D ATE 60 EvCNT PetOIPTION AND PACO AELE CONCE CUE *.CES h o I; 1During refueling outage, while performine EMI-50. scram acco,ilater level switch Ls-1 l

o;3) l85-34 for CRD 26-27 would not operate to give annunciation for high accumulator level l las required by T.

S. 3.3.A.2.e.

Bere was no redundancy available.

. ere was no I

,, i a l hazard to the health or safetf of public. Previous occurrence: BFRO-50-259/8006, I

o lBFRO-50-260/7909 and BFRO-50-259/7836.

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11anta 'evn1 switch, GE i

o lili) I part number 117Cl434P001, was a broken reed switch, ne switch was replaced and veri- !

l fled operable. No recurrence control provided.

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'O 68 49 80 NAME OF PREPARER PHONE:

e T.mnesse - Valle:, Authonty Form B F-17 15rmens Ferry Nue! ear Plant

- BF 15. 2 1/10/79 L.Ut SUPPLEMENTAL INFORM ATION 13 F it( > 259 /

8014 Technical Specification Involved 3.3.A.2.e Re;,orte ! I'nder Techn: cal Spt cification 6.7.2.b.1 U.ite of Occurrence 1/26/80 Time of Occurrence 0900 Unit l'

identification and Description of Occurrence:

CRD accu:nulator level switch LS-1-85-34 on CRD unit 26-27 was found in non -

working condition during scheduled maintenance under EMI-50.

Conditicns Prior to Occurrence:

Unit 1 @ 0% refueling outage.

Unit 2 @ 64%.

L' nit 3 @ 92%.

Acticn specified m the Technical Specificatio:2 Surveillance Requirements met due to inoperable equipment. Describe.

NA App _arent Cause of Occurrence he cause of the failure of switch LS-1-85-34 was a broken reed switch.

Analysis of Occurrence:

here was no damage to plant equipment. Bere was no activity release, no personnel exposure or injury and no, danger to health or safety of the public.

Corrective Action

ne switch was replaced and verified operable.

Failure Data:

BFRO-50-259/8006, 260/7909 and 259/7836.

• Reten tion :

Period - Lifetime; Responsibility - Administrative Supervisor

• Revision :

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