ML18219B552
| ML18219B552 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 02/03/1975 |
| From: | Dolan J American Electric Power Service Corp |
| To: | James Keppler Office of Nuclear Reactor Regulation |
| References | |
| Download: ML18219B552 (4) | |
Text
AEC DISTr
'IO"'OR Pi'iRT ~0 DOCl'-T i')/(A
'i<PL (TEX'<i'QRARY FORi'.))
1550 CONTROL NQ:
FpO.,).>>erican Electric Power
'.fr, J.E. Dolan DATE QF DOC 2-3-75 DATE P EC'D LTR 2
OTI-:ER TO NRC QRlG 1 signed CC OTHE R SB
'*-D SENT LOCAL PDR CLASS UNCLASS PROP lNcO lNPUT NO CYS REC'D DOC~cT NO'0 31 16 DESCR I?TIQ~!:
Ltr reporting an abnornal occurrence at the D.C.
Cook facility....concerning a deficiency
~ ~.diode failures in the Engineered Safe-guards System test circuitry.....
ENCLOSURES:
+~- "QOjIfARVv~E~
) f~+t '("8 PLANT NAY)
FOR ACTIC.")'ll".F0 R.)ATION 2-12-75 JB BUTLER (S)
W/
Copies CLARK (S)
W/
Copies
. PARR (S)
W/
Copies
~N KNIEL (S)
W/g Copies SCH/tENCER (S)
W/
Copies STOLZ (S)
W/
Copies VASSALLO (S)
W/ Copies PURPLE (S)
W/
Copies ZXEHANN (S)
W/
Copies DICKER (E)
. W/
Copies KNIGHTON (E)
W/
Copies YOUNGBLOOD (E)
. W/
Co ies REGAN (E)
W/
Copies LEAR (S)
W/
Copies SPEIS (S)
W/
Copies
'e KEG FILQ TECH REVIEW tAE~
e
- 4GC, ROOH P-506"A Ci!ACCARRY 9 uOSSICK /STAFF 42iXGHT
&ASE.
tC'AWLXCKX GXAifBUSSO t MAO BOYD CARTEL LO HOORH (S)
(BWR)
~iIOUSTON DEYOUNG (S)
(/<V) o'XOVAK
. SKOVHOLT (S) 'i<OSS GOILEP (S) 46PPOLXTO PE COLLXNS TEnESCO DENISE AOAIG REG OPR oLAINAS
~
~
~ILE & REGXON CD lPAENAROTA C.R.
WILSON
" STEELE
~VOLXMER IMTE~"ALDlST-l l DENTON GRItlES GAtifAHXLL CA~THER BALLARD SPANGLER EN>ISO llGLLER DICk"R KNXGHTON YOUNGBLOOD REGAN.
PROJECT LDR HARLESS
."-)UTICA LIC. ASST.
A/I IND DIGGS (S)
BRAITNAN GEARXN (S)
SALTZHAN GOULBOURNE (S)
B ~
HURT KREUTZER (E)
LEE (S)
PLANS NAIGRET (S)
NCDONALD REED (E)
CHAPHAN WSERVICE (S)
DUBE
~ /input
. SHEPPARD
(.S)
E.
COUPE SLATEg (E)
W. Hartfield (2)
SHXTH (S) f'G EVUR TEETS (S)
E/P.
WILLIA)tS WILLIAHS (E)
WILSON (S)
INGRAH (S)
/go IN=.*Wm,<~: w 4-TIC (ABERNATHY) 4"NSXC(BUCHA()SAN) 1-ASLB
~
1 hEVZON AxlDERSON
~'-~ 5-ACRS SENT TO LIC~ ASST E):T Rl" 'AL DlS RlBUTIOi!
(1) (2) (10) "NATIONALLABS 1"P..
PENNXNGTOINP RH E-201 G,T.
1"CONSULTANTS NEWHAIU(/BLUtfE/ACBABXAN 1"PDR SAN/LA/NY 1"BROORHAVEN HAT LAB 1-G.
ULRIKSON, ORIIL 1-AGIIED(RUTH GUSSMAH)
RM B-127 G,T, 1-J.
RUNKLES, Rtf E-20I G.T.
I' 4
leg tRtory DXk t >+
AMERICAN ELECTRIC POWER Service Corporation 2 BroadtoatJ, Peto York, Z. K l0004 (212) 422.4800 ZOHN E. DOLAN Zrecittice Vice Pretidetit Etigitieentig 4 Cotittrmtioti Docket tto an 6
CPPR No. 61 DPR No.
58 I i5 6'GCRQQ
,OQE9 FEB ZP )gp~
REGVUiPRy ROCr GLRR c'ebruary 3, 1975 U.S. Nuclear Regulatory Commission Directorate of Regulatory Operations 799 Roosevelt Road Glen Ellyn, illinois 60137 Attention:
Mr. James G. Keppler
~ Regional Director.--.--,-
Gentlemen:
Pursuant to the regulations of 10CFR50.$ 5(e),
ve herevith submit this report concerning an equipment deficiency vhich occurred, during construction at the Donald C. Cook Nuclear
- Plant, Bridgman, Michigan.
Unit 1 is currently operating under AEC Operating License DPR-58 and Unit 2 is being constructed under AEC Construction Permit No. CPPR-61.
The equipment deficiency has been identified as diode failures in the Engineered Safeguards System test circuitry.
This test circuitry is utilized to periodically verify the continuity of relay coils vhich are required for the proper operation of the Engineered Safeguards System.
The subject diodes are used for the sole purpose of protecting certain indicating lamps in the Engineered Safeguard System test circuitry from surge voltages generated vhen associated relays in this-system are reset (de-energized)
~
Such a relay reset vould occur after, these Engineered Safe-guards System relays have been energized in the performance test.
Diodes associated vith these relays failed during initial performance testing of the system at vhich time detection of the failure occurred.
uem3pyzg uasua3zng zagunH.g tbsp
'aalu.agape
'bshe qsyeg "bsZ 'uayyoh 'j.'8 tbsp
'uayyeg
~ bsg
'ggouzeqg pyezaO
'oo uotgonzq.suog y 3utzaaut3ug quaptsazg aoth aitqnoaxg ueyoQ 'p uqog em o ~g"
'sznoZ Zynzq, Zzah
~uotqezado paqeadaz zapun paouatzadxa uaaq aaeq saznyteg zoq.sizes ou pue suotqeotgtoads paztnbaz utqqtm saqezado clou Zzgtnozto y~
.pap.saq.
uaaj seq
'uotqeotgtpom anoqe aqua.
qq.ym Zzj.Tnozto Rue 3utpnyout
'Zzq.tnozto pzen3ageg pazaaut3ug
~ soT~syzagoezeqo a3eqyoa agetzdozdde aqua qqtc~ szoqstzm.
qqtr<
paoeyaaz pue paaomaz uaaq aaeq
-mstueqoam stqq. fio aznyteg oq. q.oaCqns Zzq.tnozto q.sag may.st spzen3ajeg pazaaut3ug aqua. ut sapoTp yye
'a3emep aznqng quaaazd og
~ pap.oaqapun 3ututemaz Zouatotgap apotp stqq.
qq.tm aotxzas ut Zzgtnozto q.sag.
may.sZp spzen3ageg pazaauy3up q.oaCqns aqua go quamaoeyd zog pap.stxa Zq.tytqtssod ou
'dna.zeq.s queued oq. zotzd quamdTnba stqq. uo'qno patzzeo mez3ozd 3uTq.sag.
aJ tsuaqazdmoo aqua og anp
'azogazaqg yauuoszad suotqezado pue psalm. qqoq og ayqeuzaosgp Zyagetpammt pue mayo azar 3uyq.sag.
aouemzogzad yeyqtuy aqua.
3ugznp aznyteg stqq.
go suotqeoyput aqua.
'zaaazoH
.paguahazd uaaq aaeq Zem maj.sag spzen3agep pazaaut3up aqua.
go suogqoung uteq.zao go uotqezado zadozd
'paqoaq.apun pauyemaz aznyteg aqua qeqq. yexzaqut amtq.
aqua 3utznp aqezado og uodn payyeo'aaq'ap.sag spzen3agep pazaaut3ug aqua. peq pue
'uotqezado queyd 3utznp paqoaq.apun pazznooo aznyTeg apotp aqua.
peH
'Zzq.tnozyo map.sag spzen3agep pazaauT3ug oq. a3emep quanbasqns pue saznyyeg apotp ut pagynsaz stqg
~uotqezt3zaua-ap ZeyaH map.sZq spzen3agej pazaaug3up 3uyznp pajezaua3 sa3egyoa a3zns aqua puef'.sqq.tm og quatotggnsuy sy sapotp zeynotq.zed asaqq.
go 3uTqez a3eqyoa aszaaaz qead aqua. geqg pauTmzaqap seq.Souayotgap aqua. oquy uogge3tq.saaut ~
gg6y 'p Zzenzqag zayddag g samey
~ zg