ML18219C354

LER-1976-021-00 for Donald C. Cook, Unit 1 - Quadrant Power Tilt of 1.023 Was Calculated Using the Excore Nuclear Instrumentation Readings

ML18219C354
Person / Time
Site:	Cook
Issue date:	05/25/1976
From:	Jurgensen R American Electric Power Service Corp, Indiana Michigan Power Co, (Formerly Indiana & Michigan Power Co)
To:	James Keppler NRC/IE, NRC/RGN-III
References
LER-1976-021-00
Download: ML18219C354 (7)

Text

NRC FORM 195 DOCKET NUMBER" I2. NI 50-315 .

FILE NUMBER NRC DISTRIBUTION FDR PART 60 DOCI(ET MATERIAL- INCIDENT REPORT TO: FROM: DATE OF DOCUMENT

'NDXANA

& MICHIGAN POWER COMPANY 5/25/76

'MR~J.. KHPPL& BRXDGMANq MICHIGAN DATE RECEIVED R, W JURGENSEN 5/28/76 J8fLE TTE R QNOTORIZED PROP INPUT FORM NUMBER OF COPIES RECEIVED 0 ORIGINAL PkV N C LASS IF I E D PKC'OPV NONE SXGNED DESCRIPTION ENCLOSURE LTR, TRANS THE FOLLOWXNG: LICENSEE EVENT RPT. (RO 50-315/76-21) ON 5/11/76 CONCERNING AN INDICATED QUADRANT POWER TILT OF 1 '23 WHICH WAS CALCULATED USING THE,EXCORE,NUCLEAR XNSTRUMEhlTATXON READINGS WHILE XN.MODE 1 AT 60% POWER,,

ACKNOWLEDGED

-P) (2-~) DQ NOT REMOVE PLANT NAME: NOTE: IF PERSOVaKL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J. COLLXNS COOK 81 SAFETY FOR ACTION/INFORMATION ENVIRO BRANCH CHIEF:

W 3 CYS FOR ACTION LIC ASST:

W/ CY ACRS CYS HOLDING/ ENT TO LA INTERNAL DISTRIBUTION E FIL I &.E 2 SCHROEDER/IPPOL'XTO 0 0 ~~i I NOVAK CHECK gy>~IES S >EI,'

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EDESCO IIACChl FTSr;N BAi R SllAO VOT.T.l IF RQBUhI; Il KRI+HIQJ~OI.Q NS EXTERNAL DISl I'IIDUTION CONTROL NUfvlAFR LPDR: T JO EPH MI TIC NSXC

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/MIAfJA 'N/C Y/GAPJ PO "JEB CO/7PAPJYi DONALD C. COOK NUCLEAR PLANT P.O. Bov 458, Bridjmnn, Michigan 40100 May 25, 1976

/

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ter.. J.G. Keppler, Regional Director Office of Inspection and Enforcement

, United States. Nuclear Regulatory Comin'ission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Operating License DPR-58

/

". Docket No. 50-315

Dear .Hr. 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.a, the following report is submitted:

RO 50-315/76-21 Sincerely,

,c'.M.

rge en/

'ssaQ

,Plan t1anager

./bab

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+ ~'=I~~maSP<

CC: . R.S.. Hunter ~g Soli~

.J.E. Dola'n G.E. Lien R. Kilburn IR.J. Vollen BPI R.>Q. Callen NPSC

.K.g. Baker RO:III P.l<. Steketee, Esq.

R~ Halsh, Esq.

Gf .Charnoff, Esq.

~

G: Olson 53%V J.)1. Hennigan PNSRC R.S. Keith

=Dir., IE (40 copies)

'ir., tlIPC (4 copies)

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OO'ITFIOL O'.OCKI~ (PLcA E PRINT ALL, FGIJIREO I;)i-OR:r)ATIO;.

1 OCENSFE LICENSE EVENT NAihiE UCENSE NINMBEA TYPE TYPE Jog II I 0 C C 0 0 0 0 0 0 0 0 0 4 1 1 1 1 Lool32 J

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7 89 14 'l5 25 26 30 31 AEPOR" P=NOAT CATEGORY c',i

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OOCKET NUhIBEA EVENT OATE REPORT OAZE T

TYi'i:'oclooN P ~L 0 5 0 0 3 1l5 0 5 1 1 7 6 0 5 2 5 716 7 0 5? '59 59 60 O'I 68 69 ~ 74 75 00 I

EVEI4T OESCRIPTIOiN Q~g 'LlHILE IN NODE 1 AT 60, PO'HER, AN INDICATED QUMRANT PO';JER TILT OF 1.023 ltAS CALCULAT D 7 89 80 USING TH EXCORE IlUCLEAR INSTRUMENTATION READItlGS. AN INCORE THERNOCOUPLE HAP 'lAS 7 09 80 QogI TAKEN AND IT CO:lFIRilED THAT A TILT DID EXIST. AN INCORE llOVABLE DETECTOR t'lAP 101-83 7 89 mt 7 8 9 tl 7

Qn I09 ITS V S l l'F 0-50-.315 j2.6; ZU:,'0'RhlE SYSTEhl CAUSE COMPUN NT COhlPONcaIT COQc COOc COi.lPO"IFNT COOE SUPPL'cA I IAiNUFACTURcA VX)IATIOI4

[oar] ~RB E CI0 II II 0 0 ~N M 1 2 0 7 . 8 9 10 11 , 12 17 48 CAUSE OESCR!PTION tm09 DURING ROD DROP TESTING RCCA E-3 llAS FOUND TO BE STUCK AND 1NDICATIONS ARE'THAT 7 0 9 80 IT E-3 KI I 89 THAT SUBSEQUENT EXERCISING HOVEMENTS TO FREE RESULTED IN A PORTION OF RCCA 80 BREAKING OFF AND BEING LEFT INSERTED I'l THE CORE. PRELININARY (SEE SUPPLEtlENT) 7 89 METHOO OF F ACIUTY STATUS ~  % POlVEA OTHER STATUS OISCOVEAY OISCOVEAY OESCRIPTION Q~g 1. ~os o NA SHIFT SURVEILLANCE 7.0 9 FORhl OF

. 10 12 13 44 45 46 ACTIVITY COATENT

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Qg 7 8 ABEASEO

~7 9

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OF AELEAiSE 10 11 NA AhlOUi4T OF ACTIVITY LOCATIOi4 OF AEI.EASE PERSONNEL EXPOSURES NUiVIBEA TYPE OESCRIPTION 7

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89

~00 0 11 Z

12 'I3 iln PERSONi~IEL IN JURIES NUMBER OESCRIPTION

~00 7

P~g 09 .,11 0 12 IIA PROBABLE CONSEQUElICES Q~g -NA 7 89 LOSS OR OAMAGE TO "ACILITY TYPE OESCAIPTION

,Q~g ~Z NA 7 89 10 80 PUBLICITY l'lA 7 89 AOOII'IONAL FACTORS 1 A PR0~1tl OF TFSTS ~~]P,LQQ~.35DEH'I'le Ql Dg/ERNINF Tllg OPERABILITY QJ'CCA..L=Z.

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PFIONE:M616~M~3 EXt. Gi 0 331 iJII col

RO-50-315-76-21 SUPPLEtlENT TO EVENT DESCRIPTIOi'l AND 1,009 IN THE LOWER HALF OF THE CORE. HOWEVER, ANALYSIS OF tfAP 101-83 DID INDICATE A FLUX DEPRESSION NEAR ASSEMBLY E-3. FURTHER If'lVESTIGATION INDICATED A StQLL PORTION OF ROD CLUSTER COiNTROL ASSEMBLY (RCCA) E-3. HAD BEEN LEFT IN THE CQRE. AT THIS POINT, RCCA E-3 WAS DECLARED INOPERABLE AND POWER OPERATION llAS LIMITED TO A MAXIMUM OF 75/ PO'LtER UNDER TECHNICAL SPECIFICATIONS 3/4.1.3.

SUPPLEMENT TO CAUSE DESCRIPTION ANALYSIS If'lDICATES THAT ONE (1) OR TWO (2) FINGERS ARE IN THEIR GUIDE. TUBES IN THE CORE (RCCA CONTAII'lS TWENTY (20) FINGERS). BY EXAMINING TRACES FROM INCORE DETECTORS F-3 AND D-3 ADJACENT TO E-3, IT IS CONCLUDED THAT THE FINGERS LEFT IN THE CORE ARE FULLY INSERTED OVER THEIR ENTIRE LENGTH.

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