ML17252B186

LER 80-032/03L-0 for Dresden Unit 3 Regarding During Normal Operations While Performing APRM Rod Block and Scram Functional Tests, APRM 3 Failed to Initiate a Rod Block

ML17252B186
Person / Time
Site:	Dresden
Issue date:	08/22/1980
From:	Scott D Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
DJS Ltr. #80-28 LER 80-032/03L-0
Download: ML17252B186 (2)

Text

Commo9alth Edison -.

Dresden Nuclear Power Station

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• August 22, 1980 DJS Ltr. 1180-28 James G. Keppler, Regional Director Directorate of Regulatory Operations - Region III U.S. Nuclear Regulatory Connnission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence Report ll80-32/03L-0, Docke~is hereby.:-;- .

submitted .to your office in accordan.ce with Dresden NU'Crea"r Power Station Technical Specification 6.6.B.2.(b), conditions leading to operation in a degraded mode permitted by-a limiting condition for operation or plant shutdown required by a limiting condition for operation.

,0 lAutJt D. ~S::t Station Superintendent Dresden Nuclear Power Station DJS/nh Enclosure cc/ Director 6f Inspection & Enforcement Director o'f Management Information & Program Control U.S. NRC, Document Management Branch File/NRC lUG 2 5 1980

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LICENSEE EVENT REPORT IQ . (PLEASE PRINT OR .TYPE ALL REQUIRED INFORMATION_)'.***~*.- .* ,. i '.'" *

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.DOCKETNUMBER" 68 69 EVENTDATE 74. 75 REPORTDATE 80 EVENT DESCRIPTION A":'D PROBABLE CONSEQUENCES@

J?Ji]. I During normal ~perations while performing APRM rod block and scram functional tests,

~I APRM 3 failed to initiate.a rod block. This was of minimal safety significance since I channel B and the two remaining instruments in channel A were operable. There was no I.

o Is 1 I effect ori public health or safety. Previous occurrence: R.O. 50-237/77-5.

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LL1iJ L!_lock relay (KS) operation. APRM 3 was bypassed and the relay was replaced. The

[]J)) l instrument was* satisfactorily tested, and returned to service. APRM rod block and*

CIIIJ I scram functional tests will continue to be perfo~ed monthly.*

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