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

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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

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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 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 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

~

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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