05000237/LER-1981-049, Forwards LER 81-049/01T-0.Detailed Event Analysis Encl

Forwards LER 81-049/01T-0.Detailed Event Analysis Encl

ML20010E119
Person / Time
Site:	Dresden
Issue date:	08/24/1981
From:	Scott D COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20010E120	List: 05000237/LER-1981-049, Forwards LER 81-049/01T-0.Detailed Event Analysis Encl 05000237/LER-1981-049-01, /01T-0:on 810814,valves 2-203-1A & 2-203-1D Had Closure Time Limits of 2.1-s & 1.7-s,respectively.Caused by Misadjusted Timing Mechanisms on Valves.Valves Adjusted
References
81-674, NUDOCS 8109030116
Download: ML20010E119 (2)

LER-1981-049, Forwards LER 81-049/01T-0.Detailed Event Analysis Encl

Event date:
Report date:
2371981049R00 - NRC Website

text

1 Commonwealth Edison

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O Dresden Nuclear Power Station

.,Q-.. e g n,,i Morris, lihnois 60450 Telephone 815:942-2920 4

August 24, 1981 to DJS LTR #81-674

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l SEP40th' 9-James G. Keppler, Regional Director O

Directorate of Regulatory Operations Region III C

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80I A NI U.S. Nuclear Regulatory Commission

$acer47 799 Roosevelt Road p

Glen Ellyn, IL 60137 g

f& V Reportable Occurrence Report #81-49/0lT-0, Docket #050-237 is being submitted to your office in accordance with Dresden Nuclear Power Station Technical Specification 6.6.B.l.(b), operation of the unit or af fected systems when any parameter or operation subject to a limiting condition is less conservative than the least conservative aspect of the limiting condition for operation established in the technical specifications.

N D.

. Scott Station Superintendent Dresden Nuclear Power Station DJS:Ig Enclosure cc: Director of Inspection & Enforcement Director of Management Information 6 Program Control U.S. NRC, Document Mgt. Branch File /NRC Zb#Ah n I 8109030116 810824 PDR ADOCK 05000237 S

PDR AUG 2 7 1981

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2)

D.EVIATION REPORT y

Ov R N O.

Commonwealth Ed.ison sTA unit YEAR N O.

D 2 89 PART 1[ TI TLE OF CEVIATICN CCCU RRE D 8/14/81 1640 MSIV 1A and ID Failure to Meet Closure Timina Requirements DATE Twt I

SYSTEM AFFECTED 203

PLANT CONDITIONS

TESTING n h eam Run 1174 9

OM_

o g, ny3 7 3

DESCRIPTION OF EVENT

~

. LOAD (MwE)

YES While performing DOS 250-2, both MSIV 1A and ID closed in less than the 3 seconds required by Tech. Spec. Table 3.7.1.

DESCRIPTION OF CAUSE

~

'OTHER APPLICABLE INFORYATION NRC notified via ENS phone at 1714. Shutdown was already in progress.

EQUIPMENT X YES CR NO.

WR NO.

Jim Doxsey 8/14/81 FAILU RE NO D15203 EESPONSIBLE SUPf 4V!SOR CATE PART 2 l OPERATING ENGINEERS CCVVENTS The MISV's were ad4usted and reti ed satisfactorilv.

Ti.es were 3.7 eac. on ID and 3.4 sec on lA after adjustment. Previously they were 2.1 sec. on MSIV 1A, and 1.7 sec. on MSIV 1D.

SAFETY-TYPE Or CEV1 ATION EVENT OF POTENTIAL TECH SPEC NON-PEPCRTABLE ANNUAL RELATED REPORTABLE CCCURRENCE PUBLIC INTEREST VIOLATICN OCCURRENCE REPORTING

'A R ISSUED X

tA CAY

)CflFfCATICN NO NO 30 CAV REPORTABLE CCCURRENCE ACTICN ITEM NO.

PROMPT ON-SITE NOTIFICATICN NLMBEF R. M. Ragan S/14/81 1700 TITLE CATE TIME KX-SI-49/01T-0 I,

TITLE CATE TIME bSikone

$f12281 1714 F. A. Palmer 8/17/81 1420 TPH M. Jordan 8/17/81 0948 REGICN III CATE TIME TITLE DATE TIME X TGV J. KeDoler 8/17/81 1350 REGICN til a COL CATE TiVE TITLE CATE TIVE RESPONSI ELE CCYP ANY O FFI CE3 I N FO P'.'ED O F 10 C F R 21 TITLE OATt

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AUTHORIZED FOR ClSTRtSUTICN

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