ML17252A254

Transmittal of Reportable Occurrence Report No. 50-249/1976-24

ML17252A254
Person / Time
Site:	Dresden
Issue date:	11/08/1976
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
50-249/1976-24 BBS Ltr. #76-784
Download: ML17252A254 (3)

Text

e Commonwea*E:dison Dresden Nuclear ~

Station R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 BBS Ltr. #76-784 November 8, 1976 Mr. James G. Keppler, Regional Director Directorate of Regulatory Operations - Region III U. S. Nuclear Regulatory Commission.

799 Roosevelt Road Glen Ellyn, Illinois 60137 E:ticlosed please find Reportable Occurrence*iieport number 50-249/1976-24, This r*eport is being submitted to your office in accordance with the Dresden Nuclear Power Station 'Technical Specifications, Section 6.6.B.

BBS :jo Enclosure

~;n~

U~. B. Stephenson

.frstation Superintendent Dresden Nuclear Power Station cc:

Director of Inspection & Enforcement Director of Management Information & :J;>rogram Control File/NRC NOV 10 1976

CONTROL BLOCK: I 1

• . LICENSEE. EVENT REPORT e I~ I I I I (PLEASE PRINT ALL REQUIRED INFORMATION]

LICENSEE NAME

@El II IL IDIR IS 13 I 7

8 9 14 CATEGORY REPORT TYPE.

6 LICENSE NUMBER 10lo1~*10:101010101-1010 I 15 25 LICENSE TYPE I.I-/ I I I I 11 11 I 26 30 REPORT SOURCE DOCKET NUMBER EVENT OATE EVENT TYPE IOl31 31 32 REPORT DATE

• @ElcoN'T I* I I lbJ l&J 101s101~101~1q1q1 1110101q171~1 11 I r I o I S't? I" I 7

8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION

[Qifil I FOLl-.OWJNG- 'R.EFUEbt>JG: OUTAG.£ SUR.VE! LLANCE TESTING: OF. THC: UN!T-31 7

8 9 80

@:@] I D1£S£J-. G-ENERATOR 7 AN ATT~MPT wAs MAPE To A1Xrusr '.fiJ'GiNE. SPEED I 7

8 9 80.

@El If.Rom THE CDNTR.oL Mom PRIOR To SYNCHRON121NG: evs 31.f-I To ~TAT10NI 7

8 9 80.

lol51 lpowE..R,.. IT WAS DISCDVE~ED AT TH I$ Tl M£ THAT ENG-INE SPEED cou LJ) I 7

8 9 I

80

[filfil NoT -:~£: R£GU "'T£D J=*R.am* TH£ CONTR.Ol.__

• T1:1.tt:* Lbc)iL=(°;ONTRo.L*_** ~- -~

7 8 9 PRIME (SEE ATTAC.HE.'l) SHE.£-r 80 SYSTEM CAUSE COMPONENT COMPONENT COOE CODE COMPONENT CODE SUPPLIER MANUFACTURER.

@0 1£ I£ I ~ I£ IN I c; I r I NI £1 L1J I tJ 11. I '1 Io I 7

8 9 10 11 12 17 43

44.

47 CAUSE DESCRIPTION lolsl I THE J..p<;S. or:- CONTR.O& 'Room SPEED 7

8 9 VIOLATION

~

48

--< @§ I By A LOOSE WtR£ ON TH£ DIESEi-. GOVR./l/OB.. CQNTR.DL CtR.C..UIT.' THE 7

8 9 E:@J.

WIR~ {£ l'YJ NAL L APPAR.E.Nlt...

LOOSEN£ 7.. 8 9 METHOD OF FACILITY

".. STATUS

% POWER OTHER STATUS o'ISCOVERY EEi 7

8, lHJ.

9 I o Io Io I ___

N_A--,,.-~I tfil 10 12 13

• 44 45 FORM OF ACTIVITY CONTENT rn RELEASED OF RELEASE AMOUNT OF ACTIVITY

~

~ _I ___

N_A __

7 8

9 10

'.11 44 45 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

[ill! 1010101 ~

NII.

7 8 9 11 12 13 PERSONNEL INJURIES

. NUMBER DESCRIPTION EE 1010101 NA 7*

8 9 11 12 OFFSITE CONSEQUENCES IiliJ NA 7

8 9 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION

~. gj.

NA 7

8 9.

10 PUBLICITY EE]

Nii 7

8 9 ADDITIONAL FACTORS ITifil

,VA 7

8 9

[iliJ 7

8 9

46.

DISCOVERY DESCRIPTION LOCATION OF* RELEASE

.. A/@*

NAME:-"-~e=-R_R.;.;.A...;...M---=C=E:;__-=£"-"-~1-_fl~N_G--_~----:-- PHoNE:-"-£-'-x_r.;...:.._Lf,,_,3""""""3 __

80

. *... so 80 80 80 80 80 80

. 80 GPO 881

• 667

l.

EVENT DESCRIPTION (Continued) station was used to unload and shut down the diesel generat©y*.

The automatic starting and loading capability 6f*the diesel generator. was not impaired by this failure.

The Unit 2/3 diesel*generat~r:was. available and op~rable.

(50-249/1976-24)

CAUSE DESCRIPTION (Continued)

• vibration; The terminal lug was tightened, restoring remot*e speed control

• capability.

• As an additional precaut*ion, all governor terminal lugs on the Unit-2,*Unit-3 and Unit 2/,3 diesels were checked for tightness.

Two.previous failures of this nature have occurred as the result of loosened governor wire terminal lugs.

Because of these previous failures,

• a check of the governor terminals was added to the annual diesel generator inspection proeedure.

Since* a third failure has occurred in spite of these annual lug inspections, further corrective action is indicated.

Accordingly,

.the station is presently evaluating alternate methods of __ PE.~ent!p.1L~~s.u:rx~.

A follow-up letter dei:;cribing the results of this ~ailMa.tri:.0nw:(,li._Ui:.ffe;:sJ01hffi;it,te.cG':_

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