ML17252B490

LER 78-050/01T-0 for Dresden, Unit 2 Re Diesel Failure to Start on First Attempt

ML17252B490
Person / Time
Site:	Dresden
Issue date:	09/07/1978
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
BBS LTR 78-1245 LER 78-050/01T-0
Download: ML17252B490 (4)

Text

.

Common.Ith Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 REGUtATORV DOCKET flt[. COPY September 7, 1978 S?

BBS Ltr. #78-1245 .-

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James G. Keppler, Regional Director  ;;;;

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Directorate of Regulatory Operations - Region III r; rt')

U.S. Nuclear Regulatory Commission (fl 7qq Roosevelt Road Glen Ellyn, IL 60137

• -*Reporta'hie---oc*currence Report #78-050/0l-T=o ,, Docket #.oso-*2'37 is -.hereby~~:*::::-:.

.. submitted ~o your office in accordance with Dresden Nuclear* Power .. * -..~,- '*

Station Technical Specification 6.6.J3.l.(e), failure or malfunction of one or more components which prevents or could prevent, by itself, the fulfillment of the functional requirements of system(s) used to cope with accidents analyzed in the SAR.

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~.B. Stephenson . *-

,- 'Station Superintendent Dresden Nuclear Power Station BBS/deb Enclosure cc: Director of Inspection & Enforcement Director of Management Information & Program Control File/NRC

.._ector *

'* .::. Di~~. '"' . of Regu-ory Operations Telec,Eis . Date 2 /;;{.t; 7 ff Regio'n . ..::iI or /. '

.. . ....... ...... _ U.S. Nuclear Regulatory Commission . _ .. Telegrammed . GE 3 ..:.§ f .

799 Roosevelt Road Glen Ellyn, IL 60137 DC cc: By_ _ _ _ __

Director Office of Management Information and Program Control U.S~ Nuclear Regulatory Commission Washington, DC 20555

SUBJECT:

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DPR-

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_:_...:..___:Nuclear

__:______ Station, Unit ~--.

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. l This will confirm a conversation with 01/l.f f5AJRJte/Z of

/ # (Je/Z*So rJ your office at / £0-0 hrs this date concerning I/ I -z_, £J- 6

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To Call:

GE 858-2660xl6 l= B. B. Stephenson, Superintendent Dresden Nuclear Power Station

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DC 1-301-492-7617 (auto) *t* Commonwealth Edison Company N I

WU - 815-942-4449/4321 R.R. Ill """

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\,n Morris, IL 60450 Station Dist: Originator (copy) t Incident File (copy) ; Telephone: 815-942-2920/292lx212

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• LICENSEE EVENT REPORT CONTROL BLOCK:lL.-..1.---J.l_..J.-__..___,_---!!I I 6 CD (PLEASE PRINT ORT- ALL REQUIRED INFORMATIONI

>of1"1 I I I LI DI RI SI 2 l@l 0 I 0 I - I 0 I 0 I 0 I 0 I 0 I - I 0 I 0 IG)I 4 I 1 I 1 I 1 I 1 l©I I *I©

~9 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE JO 57 CAT .58 CON'T lnT71 R~PO~~ L!J© I 0I s 1 0 I 0 I 0 I 2 I 3 I 7 101 0 I 8 I '2 I 4 I 7 I 8 ,@I 0 I 9 ., 0 I 7 I 7 I 8 I©

~ S. UR 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES @

I With Unit 2 at stea.?Y operation and 2/3 Diesel Generator out of service for maint- . ,,

[]JI] I enance, Unit 2 diesel failed to start on first attempt. Diesel then started properly three times. .The safety significance was minimal because off site power supplies

.[£]}] I were available. Similar occurrences as referenced in R.O. ltS0-237/1977-ll, I/l ([))J I 2-72-9, I#-12-2-75-26, I#-12-2-7S-39.

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1 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE

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'/;:;\ LE R/RO CVI ENT YEAR SEQUENTIAL REPORT NO.

OCCURRENCE CODE REPORT rYPE

. REVISION NO.

'0 REPORT NUMBER 21 71 81 22 I

23 I Io 1s Io I 24 26 I /I 27 I oI 2S l j 29 L!J 30 l=J

' 31 lQJ 32 ACTION TAKEN FUTURE ACTION EFFECT ON PLANT SHUTDOWN METHOD HOURS 22

.@ ATTACHMENT SUBMITTED NPRD-4 FORM :;us.

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SUPPLIER COMPONENT MANUFACTURER W@LIJ@) LI@

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36 Io I ol ol ol40 37 l:LI@

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 44 47 OJ)). I The pinion gear on one of the air start motors did not engage with diesel ring gear.

[III] I The air start motor was replaced and Diesel st~rted successfully. A modification

[I]1] I is in progress to install a multiple start sequence which will increase Diesel Gen-I era tor reliaPility at Dresden.

1 8 9 80 FACILITY

• f:iQ\ METHOD OF *

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STATUS  % POWER OTHER STATUS \::'./ DISCOVERY DISCOVERY DESCRIPTION CII~l LE.J@ I ol 91 sl@I U3 at steady stat~ LlLJI Surveillance Testing 1 8 9 10 12 13 ' 44 45 46 so ACTIVITY CONTENT * (.;;;\

ACTIVITY~ @

s RELEASED OF RELEASE OJI]* w@ W@L..I_N_A_ _ _ _ _ __.

1 9 10 11 AMOUNT Of 44 45 NA LOCATION OF RELEASE so PERSONNEL EXPOSURES ' ~

~l~~To@G 1 @LD-Es_c_R_'P_n_o_N_~_9 ~N~A~-------------------------~

1 s 9 11 12 13 so PERSONNEL INJURIES r;;-;.,

NUMBER DESCRIPTION6

[Ifil L0I 0 I 0 l@L--------~N~A___________;__________~

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LOSS OF OR DAMAGE TO .FACI LIT,Y. f'43\

TYPE DESCRIPTION \;:::J (QI}8 9~@)~'-----------N_A 10 ' ______---------------:-:so PUBLICITY ~ NAC USE ON Y ISSUEDt::::;\ DESCRIPTION.~ ** - l "'

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8 9 10 68 lllllffifl!IJ~

69 ' 80. ;;.

NAME OF PREPARER~---------------..;._---

J.E. Doyle PHONE: _ _ _2:::.;6::!.;S::___ _ _ _ _ __ ~'1

ATTACHMENT TO LICENSEE EVENT REPORT78-050/01T-0 COMMONWEAL1Tl EDISON COMPANY (CWE)

DRESDEN UNIT -2 (ILDRS-2.)

DOCKET If 050-237 .

While Unit 2 was at steady operation and*the 2/3 Diesel General was out of service for routine inspection, the Unit 2 Diesel Generator failed to start on the first Surveillance attempt. Thereafter, the _

Diesel Generator was started successfully three times. The safety significance of this event was minimal because all station off-site power-supplies were available. There have been several Diesel Generator failure to start occurrences reported in the past at Dresden.

~-5::=s-Qu:r:-ing;_.~th~ qperability .test the ope.rater ob~erved that the pinion gear

~~. :::**an.~*6ti:"e~~".:f~;.:th.e_, air start motor~ ~did-:.:not engage

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with the .. diesel. ' r:i.n&_.,

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gear. 'fhe air start motor was replaced ~and the Diesel started~*succe*ss;,-*_ --

fully. A modification is in progress to install a multiple start

• sequence which will increase Diesel Generator reliability at Dresden *

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