ML17173A314

Forwards LER#78-053/03L-0

ML17173A314
Person / Time
Site:	Dresden
Issue date:	10/17/1978
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A315	List: ML17173A314 ML20027A205
References
BBS-78-1386, NUDOCS 7810270234
Download: ML17173A314 (2)

Text

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Commdnweilib Edison

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Dresden ~uclea9wer Stati~n R.R. #1 l Morris, Illinois 60450 Telephone 815/942-2920 October 17, 1978

~BS Ltr. #78-1386 James G. Keppler, Regional Director Directorate of Regulatory Operations - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence Report //78-053/03L-0, Docket 11050-237 is hereby submitted to your office in accordance.with Dresden Nuclear Power Station Technical Specification 6.6.B~2.(c), observed inadequacies in the implementation of administrative or procedural controls which threaten to .cause reduction of degree of .redundancy provid.ed in. reactor protection systems .or engineered safety feature systems, e, n

• -- Sup rintendent Dresden Nuclear Power Station BBS/deb Enclosure cc: Director of Inspection & Enforcement Director of Management Information & Program Control File/NRC

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/ \~:("1:~ 'l -LICENSEE EVENT REPORT e U.S. NUCLEAR REGULA.TORY COMMISSION

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+~I DI Ll~~NSEE C~DE R I s I 2 101 1.4 15 0 I 0 I - .,

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.::~;.::*:*:~".'.'E~T DESCRIPTION AND PROBABLE CONSEQUENCES@ ':

C2J1J I* Dilring steady state operation an Equipment Attendent noted Main Steam Line (A) Flow

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(:2:JTI I s¥itch 261-:2D (1 of 16) was. valved out. Event had minimal safety significance since I o\*~*I *, .~~l other flow switches were operable as required by Tech. Specs. There are no 2fII].~ L__;_~~~~~~-'-~~~~~--'-~~~~~~~~~~~~~~~~~~~~~~~~~~--'

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~ I dause for switch isolation unknown. Switch returned to service. St.irveillance I i '

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ITill' r' s:ervice. Switch *operation* also not recorded as required by Equipment Attendant.

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i Control. room surveillance sheets will be revise.cl to include .::i. cfai.1.v ~heck* of these *., ..

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LifilJ switcP,es and requj.rea supervisory review.

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