05000237/LER-1981-007, /03L for Dresden, Unit 2 Re While Conducting Steam Line Area Temperature Switch Calibration Surveillance, Temperature Switch TS 2-261-180 Failed to Trip

/03L for Dresden, Unit 2 Re While Conducting Steam Line Area Temperature Switch Calibration Surveillance, Temperature Switch TS 2-261-180 Failed to Trip

ML17252B532
Person / Time
Site:	Dresden  (DPR-019)
Issue date:	02/17/1981
From:	Scott D Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
DJS LTR 81-151 LER 81-007/03L
Download: ML17252B532 (3)

LER-1981-007, /03L for Dresden, Unit 2 Re While Conducting Steam Line Area Temperature Switch Calibration Surveillance, Temperature Switch TS 2-261-180 Failed to Trip

Event date:
Report date:
2371981007R00 - NRC Website

text

,,

~e Commonwealt'*'ison Dresden Nuclear Poll'station R.R. #1 Morris, Illinois 60450 Telephone 815/942-.2920 DJS Ltr. #81-151

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February 17, 1981 James G. Keppler, Regional Director Directorate of Regulatory Operations - Region III U.S. Nuclear Regulatory Conunission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence Report #81-07/031, Docket #050-237 is being J submitted to your office in accordance with Dresden Nuclear Power Station Technical Specification 6.6.B.2. (a), !eacto.r protection system or engineered safety feature instrument settings which are found to be less conservative than those established by the technical specifications but which do not prevent the fulfillment of the functional requirements of affected systems.

j)tJaxt--

D.~~o*tt Station Superintendent Dresden Nuclear Power Station DJS:nh Enclosure cc:

Director of Inspection & Enforcement Director of Management Information & Program Control U.S. NRC, Document Management Branch File/NRC

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~~~~~ L1J© I o I s I o I o I o I 21 3 I 1 IG)I o 11 I 2 I 2 I 8 I 1 I© I o I 2 I i I a I a I, 10 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT OATE 80 EVENT DESCRIPTION A~_O PROBABLE CONSEQUENCES @

I During Unit 2 refueling outage, while conducting steam line area temperature switch C2I!J 1calibration surveillance, temperature switch TS 2-261-18D failed to trip.

Tech.

0 (ID] !Spec. Table*3.2.l requirement is a trip setting of less.than or equal to 200 F.

This!

I)))) lis of min~mum safety significance because remaining switches were operable and would [IIlJ !have performed their intended safety function.

This is the first occurrence of its

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OCCURRENCE

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l=J Jl ACTION FUTURE EFFECT SHUTDOWN

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ATTACHMENT NPRD-4 PRIME COMP.

SUPPLIER REVISION NO.

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CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS @

4J 44 47 (II[] I Component failure was due to a broken capillary tube close to the sensing bulb, thus!

OJJJ allowing the fill material to leak out.

Corrective action was to replace the broken I [J))J switch with a new calibrated switch.

All steam line area temperature switches shallr OJI] I continue to be tested during each refueling outage.

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FACILITY 13()\\

STATUS

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NAMEOFPREPARER.__Ra n_d_y_S_p_e_r_o_f_f _________ ~

PHONE:

DEVIATION REPORT CVR NO.

Commonwealth Edison STA UNIT YEAR NO.

D-2 2 -

81-8 PART 1f Tl TLE OF DEV I Atl ON OCCURRED 1:-22-81 1:00 PM Temperature Switch TS2-261-18D Failure of MSL Area DATE TIME SYSTEM AFFECTED 595

PLANT CONDITIONS

TESTING Primary Containment Shutdown 0

0 IXJ CJ MODE PWR<MWT)

LOAD(MWE)

YES NO

DESCRIPTION OF EVENT

While performing refueling surveillance DIS 2300-7, HPCI and MSL tunnel area temperature switch bench calibration, the above switch failed to trip as required.

DESCRIPTION OF CAUSE Found capillary had broken close to the sensing bulb allowing the fill material to leak out.

OTHER APPLICABLE INFORMATION EQUIPMENT CiJ YES FAIWRE ONO OR NO.

N/A WR NO.

Dll317 PART 2 I OPERATING ENGINEERS COMMENTS R.. Thomas RESPONSIBLE SUPERVISOR 1/22/81 DATE The remaining temperature switches were found operable.

Safety significance was minimal since the remaining switches wguld haye completed the intended safety function.

SAFETY*

TYPE OF DEVIATION EVENT OF POTENTIAL TECH SPEC NON*.REPORTABLE ANNUAL RELATED REPORTABLE OCCURRENCE PUBLIC INTEREST VIOLATION OCCURRENCE

,; REPORTING WR ISSUED D

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i Gl YES W 14 DAY 10CFR21 YES

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NO 0 NO D REPORTABLE CCCURRENCE ACTION !TEM NO.

PROMPT ON*SITE NOTIFICATION NUMBER R. M. Ragan 1/26/81 10:00 AM

~- 81-0-7 /OJL-...O TITLE DATE TIME TITLE DATE TIME 24*HOUR NRC NOTIFICATION PROMPT OFF-SITE NOTIFICATION

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OTPH N/A F. A. Palmer 1/26/81 11:44 AM REGION Ill DATE TIME DTGM N/A REGION I I I & DOL DATE TIME RESPONSIBLE COMPANY OFFICER INFORMED OF 10CFR21 CONDITIONS AND THEIR REPORT TO NBC Tl TLE Tl TLE TITLE P ETED

_ John Wujciga REVIEW AND COM L OPERATING ENGINEER ACCEPTANCE BY STATION REVIEW AS REQUIRED DATE RESOLUTION APPROVED AND AUTHORIZED FOR DISTRIBUTION 96*5176 10*77

!FORM 15*52*~)

STA1710NUSUPERINTENDENT DATE TIME DATE TIME DATE TIME l/26/81 DATE

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