ML18219C209

LER 1978-017-03L & LER 1978-018-03L Re Failure of Inverter Power Supply

ML18219C209
Person / Time
Site:	Cook
Issue date:	03/17/1978
From:	Shaller D Indiana Michigan Power Co
To:	James Keppler NRC/RGN-III
References
LER 1978-017-03L, LER 1978-018-03L
Download: ML18219C209 (7)

Text

<os/~</~REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)DISTRIBUTION FOR INCOMING MATERIAL 50-315 t J REC: KEPPLER J G ORG: SHALLER D V DOCDATE: 03/17/78 NRC IN 4 MI PWR DATE RCVD: 03/22/78 DOCTYPE: LETTER NOTARIZED:

NO COPIES RECEIVED

SUBJECT:

LTR 1 ENCL 1 LICENSEE EVENT REPT<RO 50-315/78-017/03L-0)

ON 02/15/78 CONCERNING WATER SPRAYED INTO THE INVERTOR FOR THE CD DIESEL GENERATOR SPEED GOVENOR RESULTED IN FAILURE QF THE INVERTER POWER SUPPLY...W/ATT LER 78-018/03L-0.

PLANT NAME: COOK-UNIT 1 REVIEWER INITIAL: X JM DISTRIBUTOR INITIAL: DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS INCIDENT REPORTS (DISTRIBUTION CQDE A002)FOR ACTION: INTERNAL: EXTERNAL: BR CHIEF b ENCER++W/4 ENCL EG FILE44W NCL SCHROEDER/I PPOL I TO++W/ENCL NGVAI<f CHECK+4EWlENCL KNI GHT+~W/ENCL IHAIWAUER+4W/

ENCL EI SENHUT++W/ENCL SHAG~~~~W/

ENCL KREGERl J.COLL I NS++W/ENCL K SEYFRIT/IE++Wf ENCL LPDR'S ST.JOSEPH'I++W/ENCL TIC4~+Wf ENCL NS I C+~W/ENCL ACRS CAT B4+Wf 16 ENCL NRC PDR++W/ENCL MIPC4+Wf 3.ENCL HGUSTON++W/ENCL GR IMES4+W/ENCL BUTLER++W/ENCL TEDESCO~~W/ENCL BAER++W/ENCL VOLLMER/BUNCH++W/ENCL ROSA++W/ENCL COPIES NOT SUBMITTED PER REGULATORY GUIDE 10.1 DISTRIBUTION:

LTR 45 ENCL 45 SIZE: lP+iP+iP CONTROL NBR: 78083007 THE END

,I I C o II f%4.~'7 P g~~erleen Itteotrla lower QSCd dO'ONALD C.COOK NUCLEAR PLANT P.O.Box 458, Bridgman, Michigan 49106 F a.E Cytf March 17, 1978 Mr., J.G.Keppler, Regional Director.Office of In specti on and Enforcement United States Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Operating License DPR-58 Docket No.50-315

Dear Mr.Keppler:

Pursuant to the requirements of Appendix A..Technical Specifications the following reports are submitted:

RO 78-017/03L-0 RO 78-018/03L-O Since rely, D.V.Shaller Plant Manager/pk cc: J.E.Dolan R.W.Jurgensen G.E.Lien R.Kilburn R.J.Vollen BPI K.R.Baker RO:III R.C.Callen MPSC P.W.Steketee, Esq.R.Walsh, Esq.G.Charnoff, Esq.G.Olson J.M.Hennigan PNSRC J.F.Stietzel Dir', IE (30 copies)Dir., MIPC (3 copies)pf

~r f P t n't n U.S.NUCLEAR REGULATORY COMMISSION SE PRINT OR TYPE ALL REQUIRED INFORMATION) 0 OQo4 1 1 1 1 Q4~Qs 25 26 LICENSE TYPE 30 57 CAT 58 QB 0 3 1 7 QB EVENT DATE 74 75 REPORT DATE 80 NRC FORM 386 (7.77)o J e LICENSEE EVENT REPORT oeCONTROL BLOCK: (PLEA I 6~o1 M I D C C 1 Q2 0 0 0 0 0 0 0 0 0'7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER CON'T[oot)"o,~LOs0 G 0 0 0 3 1 5 Oo 60 61 DOCK ET NUMB E R 68 69 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10~o~Iiater s ra ed into the inver ter for the CD D'~O3 in failure of the inverter power supply.The inverter was switched to the alternate power source and the engine was tested.The Diesel was inoperable for 36 minutest~OS This is the first occurrence of this type.~OB~O7~OB 80 7 8 SYSTEM CAUSE CAUSE COMP.VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE~EE Q>>EQu~GQio G E N E R A Q4~FQ>>~ZQ 9 10 11 12 13 18'9 20 SEQUENTIAL OCCURRENCE REPORT REVISION LERIRO EVENT YEAR REPORT NO.CODE TYPE NO.Q>>o Poor~78+~01 7 Qx~03+L Q QO 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDX PRIME COMP.COMPONENT TAKEN ACTION ON PLANT METHOD HOURS 022 SUBMITTED FORM SUB.SUPPLIER MANUFACTURER I A IQ>s~2Q>e~ZQoo~ZQ>>0 0 0 0 N Qoo~NQoo~AQos S 2 33 34 35 36 37 40 41 42 43 44 cAUsE DEscRIPTIQN AND coRREGTIYE AGTIQNs 027 o This condition was the result of a water su 1 ho c eanin e~OS 7 8 47 The Supervisor responsible for this.cleanin has been instructed not to use ressur ized water.cleaning equipment in the vicinity of any electrical panels~~3 METHOD OF DISCOVERY~aQ31 N/A 45 46 N A 45 NAME QF PREPARER David G.Mizner 4 7 8 9 FACILITY STATUS%POWER OTHER STATUS 0~l5~EQ28~IO 0 Qoo N/A 7 8 9 10 12 44 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY Q 6~Z Q33~ZQ34 N A 7 8 9 10 11 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 039~l7~00 0 Q>>ZQs NA 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTIONQ41

~00 0 Qoo NA 7 8 9 11 12 LOSS OF OR DAMAGE TO FACILITY 43 TYPE DESCRIPTION 6 Z Q42 N A 8 9 10 PUBLICITY ISSUED DESCRIPTION Q o~Z 044 N/A 8 9 10 DISCOVERY DESCRIPTION Q32 80 LOCATION OF RELEASE Q 80 80 80 80 80 NRC USE ONI Y o r 80'0 68 69 PHQNE 616-465-5901

~J 4 C U.S.NUCLEAR REGULATORY COMMISSION NRC FORM 366 (7.77)s LICENSEE EVENT REPORT CONTROL BLOCK: Ql(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION1 1 6~oi M 10 C C 1 Qo 0 0 0 0 0 0 0 0 0 0 OQo 4 1 1 1 I Qs~Qs 7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T KDi soos~L'..Qs 0 5 0 0 03 1 5 Qo 2 QB 0 3 1 7 7 8 QB 7 8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10~O2 Durin normal o erations, Ft/I0-212, the motor o crated auxiliar feed um dischar e valve for (51 S/6,'ailed to shut from the Control Room.This constituted degradation

~o4 of an operable flow path required by Technical Specification 3.7.1.2.The failure~os did not present a substantial safety hazard since the'valve failed in the safest (ful~06 o en osition and redundant auxiliar feed s stems were o erable.This is the.first~o 7 event of this nature at the lant.~OB 7 8 9 80~OS 7 8 SYSTEM CAUSE CAUSE COMP.VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE~CH Q>>8 Q>>~C Q13 V A L V 0 P Qls~AQls~Z Qls 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LER/RO EVENT YEAR REPORT NO.CODE TYPE NO.Q>>os osr~78+~01 8+w~03+L Q+0 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDR PRIME COMP.COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB.SUPPLIER MANUFACTURER

~EQls~ZQo~ZQoo~ZQ>>0 0 0 0 N Qos~NQos~AQos..L 3 0 0 Qos 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o FMO-212 failed to o crate due to a loose screw at an electrical connection.

in.the..valve's motor o erator control circuit.This connection was robabl not ti htened during initial installation, although previous operations with FMO-212 were success-3 ful.The 1 pose screw'as ti htened and subse uent retest was sati sfactory.No other N A 44 7 8 9 11 12 LOSS OF OR DAMAGE TO FACILITY Q43 TYPE DESCRIPTION zQ-vA 7 8 9 10 PUBLICITY ISSUED DESCRIPTION

~S LILtQ44 O 7 8 9 10 Michael S.Brown NAME OF PREPARER NRC USF.ONLY 68 69 616-465-5901 PHONE: connections were found to be loose and no further actions are 1 armed.7 8 9 FACILITY~~3P METHOD OF STATUS%POWER OTHER STATUS~DISCOVERY DISCOVERY DESCRIPTION Q32 E Qs~l0 0 Qs N/A~AQolOperator observation 7 8 9 10 12 13 44 45 46 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY~LOCATION OF RELEASE Q~z Q~zs~A 7 8 9 10 45 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39~00 0 Q>>~Z:.Qss 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTIONQ41

~00 0 Qo NA 80 80 80 80 80 80~s ss a 80~a 0 a ss