ML20038D105

LER 81-070/01T-0:on 811120,core Spray Valve Operator MO2-1402-4A Found Cracked at Weld Attaching Mounting Flange to Valve Yoke.Area of Cracked Weld Ground Off & New Fillet Weld Applied.Will Continue DOS 1400-2 Monthly

ML20038D105
Person / Time
Site:	Dresden
Issue date:	12/02/1981
From:	Anandappa A COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20038D099	List: ML20038D098 ML20038D105
References
LER-81-070-01T, LER-81-70-1T, NUDOCS 8112160065
Download: ML20038D105 (2)

Text

(7 771 LICENSEE EVENT REPORT

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lh (PLEASE PRINT C3 TYPE ALL CEQUIREO INFORMATION) fo Ul8 9l II LUCEN 7 l DEEl CooE R l S l 2 l@150 l0 l-uCEN 14 l0 El0NUM8ERl6 l0 l0 l0l- l 0 l@l264 l 1LICENSE 25 l 1 l1TYPE ! 1JJl@l57 CAT 54l@

l CON'T lol1l $y*,] lL @l 0 l 5 l0 l0 l0 l2 l3 l7 @l 1 l 1 l 2 l 0 l 8 l 1 @l1 l 2 l 0 l 2 l8 l180l@ 74 7 8 60 61 DOCKET NUMBER 68 69 EVENT DATE 75 REPORT oATE EVENT DESCRIPTION AND PRCBA8LE CCNSECUENCES h lo (2; l Following a failure of core spray M02-1402-4B valve operator, an inspection of I l o 12 I I M02-1402-4A was perfermed and found to be cracked at the veld that attaches the opera- I

,n ,,,l tor mounting flange to the valve yoke. The core spray system was declared inoperable i

,g,3, , (T.S.3.5.A.1). There was no effect to public health or safety. This event is of mini- l lol6l l um safety significance since other ECCS were operable. Previous occurrence: l lol7l l R.O. 50-237/81-69. l lo ts i l I

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. SEQUENTIAL OCCURRENCE REPORT REvlstoN tER EVENT YEAR R EPCRT No. CooE TYPE No.

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,_21 22 2J 24 26 27 28 29 30 31 32 N C N oP 7 U MoUR. 22 8 i PoM 8. sVP U MANUP RER lB gyg 33 34 l5 Zlg 3

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44 47 CAUSE CESCRIPTION AND CORRECTIVE ACTIONS @

l i I o I l The cause of the event was due to a cracked weld. The area of the cracked weld was l

,, ,,, gground off and a new fillet weld was applied circumferentially around the flange. The i

,, ,,; valve was satisfactorily tested and placed back in service. DOS 1400-2 will continue l

,,,,,y to be performed once a month to verify core spray valve operability. l l

' mI 8 9 7 80 A 4 POWER oT14EM status I.Co ERY otsCoVERY oEsCRIPTtoN y l E l@ l 0l 9l 9l@l N/A l W hl Ocarator Observation a0 l

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-a4 ig 12 is 44 as 4s REtEAsEo oPRELEAsE toCATioN oP REtEA E @

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' PERsoNNEt iN;u' Ries NuveER oEsCRiPTioNh g l0l0l0l@l N/A 80 l

7 8 9 11 12 Loss of om oAMAGE To FACIUTY h TYPE oEsCRIPTtoN v 1 9 gl N/A l

• *' PususTy 8112160065 011202 NRC USE ONLY ,

oEsCRiPTroN 45 PDR ADOCK 05000237

• 2 o issgEo[hl l N/A 6 PDR I llIIIIIIIIIlII '

i 7 8 9 10 68 69 80 3 Anthony N. Anandappa (815) 942-2920, X-421 *  ;

NAME OF PREPAREh PHONE: j I

.-__.___.__-_____________.___________.m_

/ DEVIAT:DN REPORT D=> Dvt No.

Commonwealth Edison -

sTA UNIT YEAR N O.

D 2 124 PAa71l Tl TLE OF DEV1 ATION OCCU RRED Core Spray Valve M02-1402-4A Degraded 11 'n_R1 111n SYSTEM AFFECTED 1400 PLANT CONDITIONS TEST G Core Spray gg MODE R"" pworuwr1 2515 , LOAD (MwE) 831 YES NO DESCRIPTION OF E' VENT During an inspection of the M0 2-1402-4A core spray system full flow test valve, the weld attachine the operator mounting flange to the valve yoke was observed to be cracked.

DESCRIPTION OF CAUSE l'nkncwn TITHER APPLICABLE INFORMATION T% "A" core scrav subsystem was oreviousiv operable on 11-20-81 at 0200.

EQUIPMENT C YES OR NO. WR NO.

Richard Facchina 11-20-81

_ U N/A 17075 8ESPONSIBLE SUPf evtSOR DATE PART 2 l OPERATING ENGINEERS COMMENTS Preperations made for repair of valve and shutdown since "B" core spray loop was declared inoperable on 11-19-81.

SAFETY-TYPE OF CEVIATION EVENT OF POTENTIAL TECH SPEC NON-REPORTA8LEl ANNUAL RELATED REPORTABLE OC URRENCE PUBLIC INTEREST VIOLATION OCCURRENCE REPGR TI NG WR ISSUED X 10CFR21 94 ggy _ YES X YES n 30 4AY NOTIFICATION 6.A.B.1.e NO NO REPORTABLE CC'UtrRRENCE ACTION ITEM NO. PROMPT ON-SITE NOTIFICATION NUMBER 'x x R. M. Ragan 11/20/81 1200

$tt 81 - 70 /0lT-0 N I DA E TWE i

N. N s

.71 TLE CATE TIME I 24-HOUR NRC NOTIFICATION N QROMPT OFF-SITE NOTIFICATION X TPH T. Tongue 11/20/81 1200 F.'A. Palmer 11/20/81 1210 REGION lil DATE TIME TJ JL E DATE TIME X TGM Kenoler 11/20/81 1450 F. A. Palmer- 11/20/81 1500 l REGION 111 & COL CATE TIME TI TLE DATE TIME RESPONSI ELE COEANY OFFI CER INFOPMED OF IOCFR21 CONOTT'ONS AND TWEt O QEAG AT M NPC

• TITLE DATE iiMt l

REVI EW AND COMPLETED - ..

OP ERATING ENGI Ne_tn e DATE ACP BY STATION REVIEW yg [ g' -

( DATE M

• 8'M l' d '3 RESOLUTION APPROVE 0 AND AUTHORIZED FOR DISTRIBUTION A MII Ith/O STATgN M/ERINTENDENT ~0 ATE as s'7s to-77 f romu e s st H I