ML17252B196

LER 80-017/03L-0 for Dresden Unit 3 Regarding During Refueling Outage, While Conducting Operability Surveillance Test, U-3 Diesel Generator Failed to Start

ML17252B196
Person / Time
Site:	Dresden
Issue date:	04/29/1980
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
BBS LTR #80-349 LER 80-017/03L-0
Download: ML17252B196 (2)

Text

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Commonwe. Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 April 29, 1980 BBS LTR #80-349 James G. Keppler, Regional Director Directorate of Regulatory Operat~d.ns, - Region III U.S. Nuclear Regulatory Connnission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence Report l/80-17/03L-0, Docket 1/050-249 is being submitted to your office in accordance with Dresden Nuclear 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 Superintendent Dresden Nuclear Power Station BBS:lcg Enclosure cc: Director .of Inspection &*Enforcement Director of Management Information & Program Control File/NRC

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MAY s- 1980

. LICENSEE EVENT REPORT (PLEASEPRINT.OR~TYPE A-EQUIRED INFORMATION)*

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j-)-,-2-,-.-r*Durfri.g:rerueling outage, .while conducting an operability surveillance test, the U'-3 gm I diesel generator* failed to start. The air start relay did not energize, preventing. I*

~TIJ I the pinion gears from- engaging~ The-: U

• 2/3. diesel generator was. operable* and capable 1~

lLill I of* performing* its. intend'ed

• function* and, - ther~fore-, ~here was no. haza~d to. the health I.

tifil I and safety o_f *the* public. Thi's ev:ent has occurred before.. (R.O 79-52/031-0, dock,et

• tITJ. I 050-237 and* Ro~ 75-47 /OlT-0 ;. docket 050~249). *. I fIIIl8 *9.L.___.;..;_ __;_,_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _~---.,-------.,.._---~--:---~80 SYSTEM- *CAUSE CAUSE COMP;.

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~ LE R/RO CEVENT YEAR REPORT NO.** COO.E. TYPE*. NO.

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z:m I .. _cAuse:oESCRIPTION:ANOCORRECTIVE'ACTIONS:@':*

TD4 (Multiple start relay) malfi.mcti*oned.

The screw that holds. the coil to the body of I" mJ (the telay was loose,* preventing the relay contacts from. closing properly .. The* TD4 re..:.

JJJ. 1 1ay was replac'ed, and the U-3 diesel generator was demonstrated .to- be operab1e. *.. No I

!:III I further action. deemed necessary ...

!ELL-_ __..;_..;__..;___________..;__________;...._____________...

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Fi>.CILI TY l3Q\ METHOD OF . ~

STATUS  % POWER OTHER STATUS' \::::J DISC.OVERY DISCOVERY DESCRIPTlON* ~

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. . PERSONNEL EXPOSURES . Cn\

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PREP.A.REA------------------

Sam Bader PHONE :---=:t.~---------

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