ML18219C217

LER 1978-006-00 Re Inoperable of Axial Power Distribution Monitoring System

ML18219C217
Person / Time
Site:	Cook
Issue date:	02/10/1978
From:	Shaller D Indiana Michigan Power Co
To:	James Keppler NRC/RGN-III
References
LER 1978-006-00
Download: ML18219C217 (8)

Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM <RIDS)

DISTRIBUTION FOR INCOMING MATERIAL 50-3i5 REC: KEPPLER J G QRG: SHALLER D V DOCDATE: 02/i0/78 NRC IN 5 MI PWR DATE RCVD: 02/i0/78 DOCTYPE: LETTER NOTARIZED: NO COPIES RECEIVED

SUBJECT:

LTR 0 ENCL i LICENSEE EVENT REPT. NO. 50-3i5/78-06 CONCERNING THE AXIAL POWER DISTRIBUTION MONITORING SYSTEM BEING FOUND TO BE INOPERABLE.

PLANT NAME'OOK UNIT 1 REVIEWER INITIAL: XRL DISTRIBUTOR INITIAL:

+++++++++++++4~++ DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS INCIDENT REPORTS

< DISTRIBUTION CODE A002)

FOR ACTION: BRA I CHWENCER++W/4 ENC INTERNAL: REG FILE44W/E C NRC PDR++W/ENCL 4AMr2"EN MIPC++W/3 ENCL SCHROEDER/IPPOL I TO< 4 W/ENCL HOUSTON++W/ENCL NOVAK/CHECK++W/ENCL GR IMES++W/ENCL KNIGHTS< W/ENCL BUTLER++W/ENCL HANAUER++W/ENCL , TEDESCO++W/ENCL E I SENHUT+4 W/ENCL BAER44W/ENCL SHAO++W/ENCL VOLLMER/BUNCH++W/ENCL KREGER/J. COLL INS+4 W/ENCL ROSA44W/ENCL L. CRQCKER++W/ENCL K SEYFRIT/IE++W/ENCL EXTERNAL: LPDR S ST. JOSEPH MI4+W/ENCL TIC++W/ENCL NS IC4%W/ENCL ACRS CAT B++W/i6 ENCL COPIES ifOT SUB"fITTED PER REGULATORY GUIDE 10.1 DISTRIBUTION: LTR 46 ENCL 46 CONTROL NBR: 7804702 0 SIZE: i P+2P THE END

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Wmertcen C;;,~a~eggzoo eorm DONALD C. COOK NUCLEAR PLANT P.O. Box 458, Bridgman, Michigan 49106 February 10, 1978 Mr. J G. Keppler, Regional

~ Director Office of Inspection 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 and the United States Nuclear Regulatory Commission Regulatory Guide 1. 16, Revision 4, Section 2.b, the following report is submitted:

RO 50-315/78-06.

Sincerely, D.V. Shaller Plant Manager

/bab cc: J.E. Dolan R.W. Jurgensen G.E. Lien R. Ki,lburn R. Vollen BPI K.R. Baker RO:III Fpe R.C. Callen MPSC P.W. Steketee, Esq.

1g j8 R. Walsh, Esq.

G. Charnoff, Esq.

G. Olson J.M. Hennigan PNSRC J.F. Stietzel Dir., IE (30 copies)

Dir., MIPC (3 copies)

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Form No. 4494 LICENSEE EVENT REPORT ~

CONTROL BLOCK: (PLEASE PRINT ALL REQUIRED INFORMATION) 1 6 LICENSE EVENT UCENSEE LICENSE NUMBER TYPE TYPE NAME Pop 14 I 0 C C I 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~03'32 89 25 26 30 31

~

7 14 15 REPORT REPORT REPORT,DATE CATEGORY SOURCE DOCKET NUMBER EVENT DATE TYPE Ioagcottw L L 0 5 0 . 0 3 1 5 0 0 2 I 59 60 68 69 74 75 80 7 8 57 58 61 I

EVENT DESCRIPTION

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ON JANUARY 1 1, 1978, THE AXIAL POWER DISTRIBUTION MONITORING SYSTEM APDMS WAS 8 9 80 7

FOUND TO BE INOPERABLE. AN APDMS SE UENCE SCAN HAD BEEN INITIATED T PERF 80 7 8 9

[pg~] SURVEILLANCE REQUIREMENT SPECIFIED IN APPENDIX A TECHNICAL SPECIFICATION PARAGRAP 80 7 8 9 F'

Jog 4.2.6.1A2.B. THE ALTERNATE METHOD OF OBTAINING THE IN THE CAS F 8

7 8 9 INOPERABILITY AS IDENTIFIED IN PARAGRAPH 4.2.6182B (SEE SUPPLEMIENT)(RO-050-315/78-06 Jag 80 7 8 9 PAME SYSTEM CAUSE COMPONENT COMPONENT COMPONENT CODE SUPPLER MANUFACTURER CODE CODE

~07 ~ZZ 5 Z Z Z Z Z Z N 43 44 W 1 2 0 47 48 7 8 9 10

• 11 12 17 .

CAUSE DESCRIPTION toOI THE APDMS FAILURE WAS TRACED TO A POWER SUPPLY FUSE HOLDER WHICH, POSSIBLY THROUGH 8 9 80 FATIGUE OR DEFECT, WOULD NOT HOLD A FUSE, CAUSING AN OPEN CIRCUIT. THE FUSE HOLDER

[Oaf 80 7 8 WAS REPLACED AND THE APDMS WAS SATISFACTORILY RETURNED TO SERVICE ~

[isa] 80 7 8 9 METHOD OF OTHER STATUS 06COVERY 06COVERY DESCRIPTION N/A A N/A 7 8 9 10 12 13 44 45 46 80 FORM OF AMOUNT OF ACTIVITY LOCATION OF AELEASE N/A 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES 8 9 .12 13 80 7 11 PERSONNEL INJURIES NUMBER DESCRIPTION

~14 ~oo o N A 80 M

7 8 9 11 12 OFFSITE CONSEQUENCES cm8 N/A 7 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION Z N/A 7 8 9 10 80 PUBLICITY N/A 7 89 80 ADDITIONAL FACTORS Q~g Replaced fuse holder 7 89 80 Q~g 7 89 80 T.P. Bei lman 1 ) 465-5901 (368)

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SUPPLEMENT EVENT DISCRIPTION WAS NOT UTILIZED UNTIL APPROXIMATELY TWO HOURS AFTER THE APDMS FAILURE, WHICH RESULTED IN A LOSS OF THE 90 AND 120 MINUTE SCANS.

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