ML20038A997

LER 81-065/01T-0:on 811103,during Quarterly Surveillance, MSIVs 2-203-1A,1B & 1D Had Closure Times Less than Tech Specs.Caused by Misadjusted Timing Mechanism Due to Damper Seal Misalignment.Msiv 1B Due to Normal Operation

ML20038A997
Person / Time
Site:	Dresden
Issue date:	11/16/1981
From:	Maxwell D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20038A994	List: ML20038A993 ML20038A997
References
LER-81-065-01T, LER-81-65-1T, NUDOCS 8111240578
Download: ML20038A997 (2)

Text

{{#Wiki_filter:u.u im u m, i nur vn . (PLEASE PRINT OR TYPE ALL REQUIRE 31NFORMATl;N) CONTr70L SLOCK. I i l l l l l o lh l 0 l 81 )l l I l LICENSEE v L l D CODE l R l S 14l 2 l@l0 15 l 0 l -l 0UCENSE l 0 lNUMBER 0 l 0 l 0 l - l 0 l250 l@l4 26 l1 l1 l1 l1 l@l57 CAT LICENSE TYPE JO l 58 l@ CON'T l0111 > 8 rouRCE l L gl j5 l0 l0 l0 l2 l3 l7 Ql 1 l 1 l 0 l3 l 8 l1 l@l1 l1 l1 l6 l8 l1 l@ 60 6 68 69 EVENT DATE 74 75 REPORT CATE 80 CoCKET NUM8ER EVENT CdSCRIPTION AND PROBABLE CONSEQUENCES h l o 12 l lWhile in normal routines for shutting down unit two l ,g,3, 9 the quarterly surveillance, DOS 250-2, was performed. MSIV's 2-203-1A, 1B and l ,g,,, y 1D had closure times that were less than three seconds exceeding Tech. Spec. limit of l , , ,between 3 and 5 seconds. There was minimal effect on the public and plant personnel  ; g , ;because the out-board MSIV's were within limits and all valves were operable. This  ;

      , g        event has occurred previously at Dresden. The latest event being reported by R.O.                                                                         ;

81-49-OlT-0 on Unit 2. 10181 L 80 I 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE COCE CODE SU8 CODE COMPONENT CODE SUSCODE SUBCODE 10191 7 8 Ic In l@ LnJ@ W@ IV la It lv i r I x l@ LE_J@ Ln_l @ 9 10 11 12 13 18 19 20

                               ,,,,,                                      SEQUENTI A L                       OCCURRENCE         REPCRT                    REVISION LER         EVENT YEAR                              REPORT NO.                            CODE              TYPE                       N O.
              @ ygg/RO ae              18111             l-l             l o 16 ; s i             I/I           1011I              IT l           l-l        lo I

_ 21 22 23 24 26 27 N a 30 31 32 KN ACTC ONP NT ME HoVRS S8 i FC S. SUP L E MANUFA RER lB l@l34B l@

               ;s3                          l35A l@          l36Al@            l0 l0 l9 l9 l 37 l Yl@

41 lNl@ l43N l@ l G l 0 18 l047 l@ 40 42 44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l1 iOll Timing mechanisms became misadjusted for MSIV's lA and ID due to hydraulic damper seal l

,, ,,,; misalignment, and for MSlv 1B due.to normal valve operation. New seals were installed l g

on MSIV's lA and 1D. All three MSIV's were readjusted and timed satisfactorily. The g quarterly timing surveillance will continue to be performed to ensure proper closure  ; times are maintained. , 7 8 9 80 S  % POWER OTHEP STATUS 015 0 RY DISCOVERY CESCRIPTION N/A lB l l@l Operator Observation l1 l s8 l l D l@ l 0 l 3 l 912l@ln 44 45 e l 0 80 ACTivlTY CO$ENT CELE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE l1 l 6 l l Z l g 10l Z lgl N/A l l N/A l 7 8 9 11 44 45 80 PERSONNEL EXPOSURES N 8ER T*PE DESCRIPTION l 3 l 7 l l 0 lU l 0 l@l Z lgl N/A l

             ' P"ASONNEL INJU IES NUMBER              CESCRIPTION li 181 7        8 9 lo l o lo l@l12 11 N/A 80 I

LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION I 1 l 91 l Z l@l N/A l 9 11 3 to 80 rusuC TY 8111240578 811116 NRC USE ONLY

• PDR S

ADOCK 05000237 . 2 o isSuEo@OESCRIPTION [N_J l N/A PDR I IIIIIIIIIIIl!I 7 8 9 10 68 63 30 3 NAME OF PREPARER Don Maxwell PHONE:94 2-" - x-48 $

U s. v irt i IUit nLTUn1 -- DVR NO. C001!Ilonzealth Ed.ison - STA UNIT YEAR NO G 2- 81 - 119 PART il Tl TLE OF DEV1 ATION OCCURRED . MSIV Closure Time Out of Spec. 11/ 1 1420 SYSTEM AFFECTED iPLANT CONDITIONS 203 TESTING Main Steam Run 984 280 MODE PWR(MWTl , LOAD (MWEl YES NO DESCRIPitON OF EVENT During quarterly timing of Main Steam Isolation Valves, (DOS-250-2), inboard 7. solation Valves 203-1A, 203-1B, and 203-lD had closure times of: 1A (2.6 and 2.0 sec),1B (2.5 and 2.7 sec) and 1D (1.8 and 1.8 sec); Tech. Spec. Limit is between 3 and 5 sec. . DESCRIPTION OF CAUSE Unknown LITHER APPLICA8LE INFORMATION Orderly shutdown of unit in progress due to increased containment leakage. EQUIPMENT C YES OR NO. WR NO. Bob Herbert 11/3/81 FAILU RE O NO eESP_ONSIBLE SUPERVISOa OATE PART 2 l OPERATING ENGINEERS COMMENTS Unit shutdown within 24 hours as required by Tech. Specs,for inoperable isolation valves. Valves will be repaired or adjusted to within proper timina specs. prior to returning unit to service.- TYPE OF CEVIATION SAFETY-EVENT OF POTENTIAL TECH SPEC NON-REPORTABLE ANNUAL RELATED REPORTABLE OCCURRENCE PUBLIC INTEREST VIOLATION OCCURRENCE REPORTING WR ISSUED x !4 DAY 10CFR21 YES X YES ] 30 DAY 6N0T FlCATION _ 6 . 'B _ _ _ NO NO REPORTABLE CCCURRENCE ACTION ITEM NO. PROMPT ON-SI TE NOTIFICATION NUMBER R. M. Ragan 11/4/81 0800

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35- 81-65/0lT-0 TITLE DATE TIME TITLE DATE TIME 24-HOUR NRC NOTIFICATION PROMPT OFF-SITE NOTIFICATION TPH rye 1432 F. A . Palmer ow,,,,, yy/t/91 11/4/81 1502 __ REGION IIi DATE TIME TITLE DATP TIME x TGA I. G. Kennier 11/4/81 1427 REGION iiI & COL CATE TIME T I TLE DATE TIME RESPONSI BLE CCMP ANY O FFI CER I NFORVED OF 10CFR2i CSN 011"! O N S AND THE1A AEPOAT TO NPC TITLE _ DATE iIMt REV1 EW AND CCMPLETED _ T. Lang MiMm i 11/4/81 OPERATING ENG4Npy.H( W DATE A CEP BY STATION REVIEW 4 g g, g4 DATE # ~ _d / RESOLUTION APPROVED AND M [[264 M M 7 f/ AUTHORIZED FOR DISTRIBUTl0l4 STATIOW U INTENDENT / CtATE 84*9876 10-77 (FORM 1 S* S 2- t I

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