05000316/LER-2078-006, Re Inoperable of Axial Power Distribution Monitoring System

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)

LER-2078-006, Re Inoperable of Axial Power Distribution Monitoring System

Event date:
Report date:
3162078006R00 - NRC Website

text

REGULATORY INFORMATION DISTRIBUTION SYSTEM <RIDS)

DISTRIBUTION FOR INCOMING MATERIAL 50-3i5 REC:

KEPPLER J G

NRC QRG:

SHALLER D V IN 5 MI PWR DOCDATE: 02/i0/78 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:

INTERNAL:

EXTERNAL:

BRA I

CHWENCER++W/4 ENC NRC PDR++W/ENCL MIPC++W/3 ENCL HOUSTON++W/ENCL GR IMES++W/ENCL BUTLER++W/ENCL

, TEDESCO++W/ENCL BAER44W/ENCL VOLLMER/BUNCH++W/ENCL ROSA44W/ENCL K SEYFRIT/IE++W/ENCL REG FILE44W/E C

4AMr2"EN SCHROEDER/IPPOL ITO< 4 W/ENCL NOVAK/CHECK++W/ENCL KNIGHTS<W/ENCL HANAUER++W/ENCL EISENHUT+4 W/ENCL SHAO++W/ENCL KREGER/J.

COLLINS+4 W/ENCL L.

CRQCKER++W/ENCL 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: iP+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

Dear Mr. Keppler:

Operating License DPR-58 Docket No. 50-315 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 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)

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Form No. 4494 LICENSEE EVENT REPORT ~

CONTROL BLOCK:

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89 14 15 LICENSE TYPE EVENT TYPE 0

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'32 (PLEASE PRINT ALLREQUIRED INFORMATION)

REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER Ioagcottw~

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8 57 58 59 60 61 68 EVENT DATE REPORT,DATE 0

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EVENT DESCRIPTION

ON JANUARY 1 1,

1978, THE AXIAL POWER DISTRIBUTION MONITORING SYSTEM APDMS WAS 9

FOUND TO BE INOPERABLE.

AN APDMS SE UENCE SCAN HAD BEEN INITIATED T PERF 9

SURVEILLANCE REQUIREMENT SPECIFIED IN APPENDIX A TECHNICAL SPECIFICATION PARAGRAP 9 4.2.6.1A2.B.

THE ALTERNATE METHOD OF OBTAINING THE F' IN THE CAS F

80 80 80 9

8 INOPERABILITY AS IDENTIFIED IN PARAGRAPH 4.2.6182B (SEE SUPPLEMIENT)(RO-050-315/78-06 9

SYSTEM

CAUSE

CODE CODE PAME COMPONENT SUPPLER COMPONENT MANUFACTURER COMPONENT CODE

~ZZ 5

Z Z

Z Z Z Z

N W

1 2

0 9

10 11 12 17 43 44 48 CAUSE DESCRIPTION THE APDMS FAILURE WAS TRACED TO A POWER SUPPLY FUSE HOLDER WHICH, POSSIBLY THROUGH 47 80 9

9 10 12 13 FORM OF 9

10 11 PERSONNEL EXPOSURES 9

11

.12 13 PERSONNEL INJURIES NUMBER

DESCRIPTION

~oo o

N A 9

11 12 OTHER STATUS N/A AMOUNT OF ACTIVITY METHOD OF 06COVERY A

44 45 46 44 45 N/A N/A 06COVERY DESCRIPTION LOCATION OF AELEASE 80 80 80 80 80 9

80 FATIGUE OR DEFECT, WOULD NOT HOLD A FUSE, CAUSING AN OPEN CIRCUIT.

THE FUSE HOLDER 80 WAS REPLACED AND THE APDMS WAS SATISFACTORILY RETURNED TO SERVICE

~

cm 7

8 7

8 OFFSITE CONSEQUENCES N/A 9

LOSS OR DAMAGE TO FACILITY TYPE

DESCRIPTION

Z N/A 9

10 PUBLICITY N/A 80 80 7

89 ADDITIONAL FACTORS Q~g Replaced fuse holder 80 7

89 Q~g 7

89 T.P.

Bei lman 80 80 PH 1

) 465-5901 (368)

GPO SGI ~ 007

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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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