ML20090D016
| ML20090D016 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 11/07/1975 |
| From: | Carroll J, Sullivan J JERSEY CENTRAL POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| AO-75-30, NUDOCS 8302230110 | |
| Download: ML20090D016 (3) | |
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Report Ec.ce:
5'r.rc::6er 6,197 Occurrer.oct T;wember 6,1975
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Initis) tfritten Time of_
i Occur:nr=ce: amreu.10:30 AM Report Date:
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- s 0"tSTEit CTJJX NUCt. EAR CINERATIM *,7;iTL'.M ICT.tE;G RIVER, NEN JEISEY OE7.I2 Abnornal Occurrence Encrrt No. 50-219/75/ 3D IECTIIFIC2104 Violatics of the Technics 1. Spec 5flect5cn c,, paragraph 3*I393 OF CCOJ E T.3
1ere k,. : tor Pressure dore Spray 1r.%2sr rec =5ssive Pressure Swiede TC 1.7 J. earl C was found to t:ip ot. pressures less thna t.b:: m:2tiztna required value of 2G5 ysis.
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D is eveet 1.9 ccmsidered to be ca &mn3 occurrence as de-f fined in tSe Technical Specificatswr,. paaa;roph 1.15B q
CCiDITICG 97.IOR TO CCCUR.CENCi:
I Et o?ct State Pewcr
_ f~rmioe Shutdown Ect Ste-dby Cpnwidon Celd Eb:.ttdown
!!z.c/J G:anges During Fr0 eS;2g Shutdevn Wrmhe Power Operatiert P.:crire Startup Ct'iea- (Specify)
C. ?rnxka Pcwer:
Core 1565 kW Electrical 532 Sms 4
Flow:
Cecirculatica 35.2 :P IC G7H Fecarater 5.75 :: d' MdUr.
Stack C a 9.000 g C1/Sec.
I gggg gg Cn Warshy c 3 Friday, h*ovetbor 6 n'1 L.!T**5 while perforning the cr-:fr,Iy 02 CC/' 75.I'Cd' : sureills::co mting n the four (4) 1.
h: car Pressure Core Sprzy vsIre j d
Pernissir.: Presmre Switches, it vs s.:lis.cm:M that Switches RE 17 A crJ C tripped at 277 psi; and 252 ;s3g, respectively. Etet *efe.> are less than the 7et.wlc,23 Spec 2.t1cerle.:1 liriit ot* O'% pstg. The Prossure Switc2w:s T3 27.it and C vere it:nediately recalib m L The "as fomd* sal Ns Icft" switch settizgs en:
"As Fotd " Setefry "As Lef t" Se t tirws UE 17 A 277 p ic.
235 psig FJ. ' 17 B e
206 psig 286 psig RE 17 C 257.p>.ix 285 psig idi 17 D 235 pai2 238 psig s
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50-219/75{..%j i.
Ceport No.
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Desijm Procedure CF CCCITPJJNCE;.'.
M m facture Unusual Sewite ConditD 1
Jnstallatica/
Inc. Enviroaamttal Ccastivetion Component Failure Op=rntor Other (Specify)
X De cause of r.hin c.cm:ctence is switch rey.;trahi.tity.
AM. LYSIS tr -
DCChl$51CE: The fen Sprey Qet. tar petallcl isolction valves open when a low-Ic.w reactor na a
, IcecI und/or hich drywell plusmre consitien cy.ists in n-dition to a low reactor pressure co
' dition (285 psig). ne fouc CQ Tes fesctor pressure core spray valvo pcmis:Alvo switches s the low reactor pressure ccedtim c.4 provi-da signals to the valve cpening Ic;ic. Two (2)
- of Sese switch'-s TFE 27A,rd Pt.s: e escocleted with Cure Spney Srstem I and the utixt tad i l switche., (RE 17C end D) arv crx.d.cd:$with Core Spr.:r Spren 22.
A trip of one witch in s i Core Spray System is required On. et%:t para 11c1 isolatics valve opening in that systen. A j review of the "as femd" seird. sdrr.ings indiente that p=rn tici isolation valvrs in both Cor.
i Sycay Systens wuld have o c:xeA. c. a reactor pressure of MS psis for Systen I and 23S psig
' for Systo a II had : recctor km-Itcv vater 3cvel end/or high dry.re11 pressure condition exist.
- cr.mcurrently. The safety sfWir.tr.cc cf this event is consfr. fared to be the loss of sultch o redimdancy, r.
01?SETIE 5,CTIGV: Itzediate correctim sche involvc<1 the recalibration of pressure switchos Pil7A r.:
here cre continuing efforts m n.m3hv *he incocpatibilitics be.t>:m.r. the Technical Specificar.
stpoint linits cnd the senscr pa-rfe:m.;e linits. It is felt that the conserve.tive design c.s-
- .soci t.ted with the deprivat.ico. cf en yttr.t safety liuits util pernit n change in the Technic.
pecificaticas to be cede which wfM t.de into account the rapected sensor perforrance variati.
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.ifr.;yiJ','chetnote instances of cnomal occurrence reports caused by the nornal wriation it ensor setpoint within the decirr sawgire.s of the plant safety lirits, h[U.WII UAT&- R'tnuft.ctumr; Msicle Type: Prer,srn 5<ctucon 5 eitch I
Rense: 50-1203 hY5C; l
j,5 witch No.t 32 i?-AL255 UE17/.)
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Abnormal Occurmem 79ert No. 50-219/75/ 30 i
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1 The following 3s n p3?.s.Inary report bein
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