ML17319A869

LER 81-016/03L-0:on 810416,setpoint Value for Turbine Impulse Chamber Pressure Bistable Was Discovered to Be Wrong.Caused by Incorrect Tech Specs.Bistables Reset.Tech Spec Change in Progress

ML17319A869
Person / Time
Site:	Cook
Issue date:	05/15/1981
From:	Rischling J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17319A867	List: ML17319A865 ML17319A868 ML17319A869
References
LER-81-016-03L, LER-81-16-3L, NUDOCS 8105210335
Download: ML17319A869 (10)

Text

REGULATO INFORMATION DISTRIBUTION STEM (RIDS)

ACCESSION NBR ~ 8105210335 DOC ~ DATE! 8 1/05/15 NOTARIZED ~ NO DOCKEiT>> 0 1-AcILt:50 516 Donald c ~ cook Nucl ear Power Plant< Onit 2~ Indiana & 05tb00316 AOVH ~ SAME AUTHOR Af FlLIATION RISCALINGp J ~ L, Indiana & Michigan Electr ic Co ~

RFCIf iNAM4 RECIPIENl AFFILIATION Region 3gChicagoi Office of the Dir ector

SUBJECT:

LER 81-016/03L. 0:on 6104]6'<setpoint value, for turbine.

(mpulse cRamber pressure bisteble was" discovered to be-.

wrong. Caused by incor rect Tech Specs.Bistables reset; lech Spec change in progress, DISTRZBuTroN cooE,: A002S COPIES RECEI VEO: L>TR ENCL ,1 SIZE-:

f'ITCH,- Incident Aepor ts NOTES:Send 3 copies. of a11 material to 1&E; 05000316 RECIPIENT COPIES RECIPIENT COPIES IV CUOt:/NAME1 LTTR ENCL IO t UOt."/NAME- LIER~ ENCL:

ACTION: VARGAg S ~ 04 3 INTE RNALe A/D COMP&STRU06 1 1 A/D ENV TECH 07 1 1.

A/D MATL & QU08 1 1 A/D OP REACT009 1 1 A/D PLANT. SYS10, 1 A/D RAD PROT 11 1.

A/0 SFTY ASSE12'EOD 1 ACC EVAL BR i4 i 3 '

AEOO/DMU 3 3<

ASLBP/J ~ HARD 1 AUX SYS BR 15 1 1 CHEM ENG BR lb. 1 1 CONT'"SYS BR 17 i CORE PEHF BR 18. 1 D IR p ENG INEERI20 i OIR'g HUM FAC S21 i 1.

0'1'R SYS IATEG22 1 OFF TR S7S BR23~ 1. EQUIP QUAL- BR25 1 1 ~

bEUSCIEACES 26 1

'1 k&C SYS BH 29 i i LE, 05 i 1 JOAoaN,E./IE i LIC GUIO BR 30 i i END BR 32" 'ATL 1

MECH ENt 8R 1 ~ NRC PDR i i OA ASSESS 8R 35 i i SYS BR 02'OAER 1 1~

RAO A88t.SS BR39 1 eR. 40 S6'EACT'YS 1 1 RFC FiCE =Oi 1 1 REL 8 RlSK A 41 ~

i SFTY FROG EVA42 1 1 Sl'RUCT ENC BR44 i i*

EXTERNAL% ACRS 46 16 16 LPOR 03. 1 1~

Aslc 05 TOTAL NUMBER OF COVIES REQUIRED'TTR ~ ENCL

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+'o arlaen I@ccrID p INDIANA'& MICHIGANEIECTRIC COMPANY DONALD C. COOK NUCLEAR PLANT P.O. Box 468, Bridgman, Michigan 49106 (616) 465-6901 May 15, 1981 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-74 Docket No. 50-316

Dear Mr. Keppler:

Pursuant to th'e requirements of the Appendix A Technical Specifications, the following report/s are submitted:

RO 81-015/03L-0 RO 81-016/03L-O.

Sincerely, D.V. Sheller Plant Manager

/bab cc: J.E. Dolan R.S. Hunter R.W. Jurgensen R.F. Kroeger R.W. Kilburn E. Swanson/N. DuBry RO:III R.C; Callen MPSC G. Charnoff, Esq.

J.M. Hennigan W. Lavallee EPRI PNSRC J.F. Stietzel INMIIog'fgOI,'f<)] hajj i imp%I E.L. Townley Dir., IE (30 copies) NAY ~8 l981 Dir., MIPC (3 copies)

~ QA'f 1 8 1981

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NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION t7 )77)

[CENSEE EVENT REPORT

) CONTROL BLOCK: Q1 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

~07 7 8 9 M I D C LICENSEE CODE C 2 14 QE 15 0 0 0 0 0 0 0 LICENSE NUMBER 0 0 0 0 25 Q3 26 4 I I I LICENSE TYPE I

30 QE~Qs 57 CAT 58 CON'T KD38 soIIRcE ~LQB 60 61 0 5 0 0 0 DOCKET NUMBER 3 1 6 68 Q 69 0 4 1 EVENT DATE 6 8 1 74 Q'5 REPORT DATE 80 Q9 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 DURING A SURVEILLANCE TEST WHILE IN MODE 6 IT WAS DISCOVERED THAT 6-4 KV BUS

~O3 DEGRADED GRID VOLTAGE RELAYS WERE OUT OF SPECIFICATION HIGH (T.S. TABLE 3.3-4 ITEM

~O4 S.b.) AND 4-4 KV BUS LOSS OF VOLTAGE RELAYS WERE OUT OF SPECIFICATION HIGH WITH 1 RELAY OUT OF SPECIFICATION LOW (T.S. TABLE 3.3-4 ITEM 8.a.)

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~OB 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

~OB ~IB 9 10 Qii E Q73 ~AQ13 12 13 R E L A Y S 18 QE ~DQ18 19

~z 20 Qis 7 8 11 SEOUENTIAL OCCURRENCE REPORT REVISION Q17 LERIRP REPoRT ACTION FUTURE EVENT YEAR

~81 21 22 EFFECT

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~DI 24 REPORT NO.

s 26 Qw 27

~03 28 ATTACHMENT CODE 29 NPRDQ TYPE

+L 30 31 PRIME COMP.

NO.

Qo 32 COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

~EQ78 ~Ã Qis ~ZQER +2Q>> 0 0 0 0 ~Y Q33 ~Y) Q34 ~N QEE 8 0 8 0 Qss 33 34 35 J6 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 o INVESTIGATION REVEALED THAT THE DEGRADED GRID VOLTAGE WOULD HAVE ACTUATED AT BUS VOLTAGE OF 3623 VOLTS ON THE T 21A BUS AND 3640 VOLTS ON THE T 21D BUS (T.S. LIMITS 3578 TO 3614 VOLTS). THE DIESEL START AND LOAD SHEDDING RELAYS FOR THE LOSS OF' VOLTAGE WOULD HAVE ACTUATED AT A BUS VOLTAGE OF 3248 VOLTS ON THE T 21C BUS. ONE 4

RELAY WAS OUT OF SPECIFICATION ON EACH OF THE ( SEE ATTACHED SUPPLEMENT) 80 7

s 8 9 FACILITY STATUS H Q38 ~00 TPPOWER 0 Qs NA OTHER STATUS ~

~3P METHOD OF DISCOVERY

~BQ37 SURVEILLANCE TEST DISCOVERY DESCRIPTION Q32 8 9 10 12 13 44 45 46 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITY Q LOCATION OF RELEASE Q36

~l6 ~Z P>> ~Zg34 10 NA 44 45 80 7 8 9 11 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

~i> ~00 0 Qsi Z Q38 NA 80 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTION 41

~18 ~00 O Qo NA 80 7 8 9 11 12 LOSS OF OR DAMAGE TO FACILITY 43 TYPE DESCRIPTION 9 Z Q42 NA 7 8 9 10 80 O

PUBLICITY ISSUED LNJQ44 DESCRIPTION ~ NA NRC USE ONLY ES o

7 8 9 10 68 69 80 o 616-465-5901 0 NAME OF PREPARER J. L. RiSChling L 0

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ATTACHMENT TO LER¹81-015 03L-0 SUPPLEMENT TO CAUSE DESCRIPTION T 21A, T 21B and T 21D BUSSES. THESE DID NOT AFFECT THE OPERABILITY OF THE ACTUATION SETPOINTS SINCE IT RE(UIRES SIGNALS FROM TWO OF THREE RELAYS TO ACTUATE THE DIESEL START AND LOAD SHEDDING SEQUENCE.

ONLY ONE RELAY ACTUATED BELOW THE T.S. TOLERENCE. THESE RELAY SET-POINTS, ALTHOUGH IN EXCESS OF THE PLUS OR MINUS 18 VOLT LIMIT, WOULD HAVE ACTUATED BEFORE THE T.S. VALUE WAS REACHED. A RE-EVALUATION OF THE PRESENT TOLERANCES OF THESE RELAYS, MANUFACTURED BY G. E., MODEL NO. NGV13, IS IN PROGRESS.

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NRC FORM 366 V. b. EWVVL Wn EItULJLRR I EJn Y L CEEP<<9115514JES I7.774l1 lCENSEE EVENT REPORT I

CONTROL BLOCK QI (PLEASE PRINT OR TYPE ALL REQUIREO INFORMATION) 1 I 6

~01 7 8 9 M I 0 C LICENSEE CODE.-

C 2 QE 14- IS 0 0 0 0 0 0 0 LICENSE NUMBER, 0 0 0 0 25 Qs 4 26, 1 1 1 LICFNSE TYPE 1

30 Q4~ps 57 CAT 58 CON'T

~o> P

~LQE 0 5 0 0 0 3 1 EQT 0 4 1 6 8 1 Qs 0 5 I 3 9 I Qs 68 69 EVENT DATE 74 75 REPORT DATE 80 DOCKET NUMBER EVENT OESCRIPTION ANO PROBABLE CONSEQUENCES 10

~02 WHILE REVIEWING ENGINEERING DOCUMENTS ON APRIL 16, 1 981, IT WAS DISCOVERED THAT THE T. S. SETPOINT VALUE FOR THE TURBINE IMPULSE CHAMBER PRESSURE BISTABLES IS WRONG ( T.S.

~03 7 INTERLOCK 55 PSIA) THE CORRECT VALUE SHOULD BE 55 PSIG SINCE TABLE 3 3 1 P INITIAL CRITICALITY, THESE BISTABLES HAVE BEEN SET TO A MAXIMUM VALUE OF 66 PSIA, WHICH IS CONSISTENT WITH A VALUE OF 55 PSIG. THESE BISTABLES HAVE BEEN RESET TO o 8 55 PSIA UNITL A T. S ~ CHANGE IS APPROVED CORRECTING THIS ERROR ~

~OB 80 7 8 9 SYSTEhl CAUSE CAUSE COMP VALVE CODE CODE SVBCODE COMPONENT CODE SUBCODE SUBCODE Agp>> 9 Qn ~AQTE Z Z'Z Z Z Z Qii ~ZQE ~ZGE 8 9 10 11 12 13 18 19 20 7

SEQUENTIAL OCCURRENCE REPORT R EVI5 I ON Qii LERIRO REPoRT ACTION FUTURE EVENT YEAR

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21 22 EFFECT

~23 SHUTDOWN 24 REPORT NO.

~0'1 6 26

~W 27

~03 28 ATTACHMENT CODE 29 NPRD 4 TYPE

~L 30 PRIME COMP.

+

31 NO.

+0 COMPONENT TAKEN ACTION ON PLANT i444ETHOO HOURS +22 SUBiVIITTEO FORhl SUB SUPPLIER MANUFACTURER

~ZQ19 ~ZP26 ~ZPE' 0 0 0 ~N Q23 ~NQ24 ~Z Q29 Z 9 9 9 Q26 Q18 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS 27 o INVESTIGATION REVEALED THAT THE 55 PSIA LIMIT IDENTIFIED BY THE ENGINEERING DOCUMENT AND T.S. TABLE 3.3-1 SHOULD ACTUALLY BE 55 PSIG. A T.S. CHANGE IS IN PROGRESS TO CHANGE THE SETPOINTS TO A MAXIMUM VALUE OF 66 PSIA. THE TURBINE IMPULSE CHAMBER PRESSURE BISTABLES ARE PRESENTLY SET AT 55 PSIA UNTIL THIS T.S. CHANGE IS APPROVED.

80 7 8 9 FACILITY STATUS 'Xi ~00 POWER 0 NA OTHER STATUS ~

~3Q METHOD QF DISCOVERY

~AQ31 DOCUMENT REYIEW DISCOVERY DCSCRIPTIOi'4 32 CT3 7

s 8 9 W QEs 10 12 Q29 13 44 45 80 ACTIVITY CONTENT LOCATION OF RCLEASE Q 7

6 8

RELEASED OF RELEASE

~Z 9

Q33 10 z pNA 11 AMOUNTOF ACTIVITY 44 45 NA 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 2 ~0000 00 Q3 2 Z Q3 8 NA 12 13 80 7 8 9 11 PERSONNEL INJURIES 12 80 7 8 9 11 LOSS OF OR OAMAOE TO FACILITY 43 TYPE DESCRIPTION Z NA P42 8 9 10 80 PUBLICITY NRC USF. ONLY PE OT 4

68 69 80' 7 8 9 10 616-465-5901 0 NAME OF PREPARER J. L. Ri SChl ing 0.

0 C

MAY 8 V 1981'