ML19351G421

LER 81-006/03L-0:on 810117,main Steam Line D Radiation Monitor Failed & During Repairs Line a Monitor Cable Was Disconnected.Caused by Technician Error.Techniques Reviewed W/Technicians

ML19351G421
Person / Time
Site:	Peach Bottom
Issue date:	02/13/1981
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-81-006-03L, LER-81-6-3L, NUDOCS 8102230669
Download: ML19351G421 (1)

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U.S. NuCL f AH HEGuLATGHY COMMISSION I

LICENSEE EVENT REPORT l

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41 60 61 DOCKET NUVBER 68 b3 EVENT DATE 74 7b HEPORT DATE 80 EVENT DEsCniPTION AND PROBABLE CONSEOuENCES h lo lzl 1 With the plant at power the 'D' main steam line (MSL) rad monitor failed l-l- 1T1 I in the tripped condition, and was maintained tripped per Tech. Spec. I J

10187 I Tabl e 3.1.1. During repairs the ' A' monitor cable was erroneously dis- 1 i

in t sj i connected. A plant shutdown was initiated per Tech. Spec. Tabic 3.1.1. l lo le 1 i until the monitor was returned to service in approximately 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. Be- I l o l 71 I cause the 'D' monitor remained tripped durina the event, the required l I O ,s i i protective action would have been initiated on MSL hiah rad levels. I

? 8 9 80 SYSTEM CAUSE CAUSE CODE COMP. VALVE CODE SUBCODE COYPONENT CODE SUSCODE SUBCODE

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CAUSE CESCRIPTioN AND CORRECTIVE ACTIONS

[I.) OJ L _Ilm cause was technician error. Reoair work was beina done hurried 1v due l L.LL Jl to extremelv hioh temocratures in ih? area a it was assumed the 'D' I

,,,,,I monitor was next to the 'D' MS line. Proper instrument identification i j ilaj l techniques were reviewed with the technicians. The rad monitor cables l l i 14 I i will be more clearly marked during the next appropriate outage. l_

I B 9 80 STA S  % POWE R OTHER STATUS Di O RY DISCOVERY DESCRIPTION

!I i l'> l l El@ l 0 l 3 l 0 l@l N/A l l Al@l ' Operator Observation l A TiVITY CONTENT RELE ASE D OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE l1 l6ul 9[_Zj @ [,Z_j@l

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N/A l l N/A l to 13 44 4b PERSONNEL EXFOSURES 40 NUMBER TYPE DESCRIPTION

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PERSONNEt,~;UWiES NUMuER

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• li la l 101010 l@lDtSCmPriON@ /A t 8 if 11 12 N _,,,5, Q M *"*'

l LOSS OF OR DAMAGE TO FACILITV p' nu TYPE DESCRIP TION @* h. o 's3.f II I >l" Lz_l@l N/A l

,UensTY tem o a oESCRiPisON O ' NRC W ONI Y I>lof r.sUt r@l N /A / . [ H0llDpp ' _ _

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NAME EPARER

• Y PHONE:

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Mr. Boyce H. Grier, Director No. 2-81-06/3L ,

Office of Inspection & Enforcement, Region 1 i U.S. Nuclear Regulatory Conrnission I 631 Park Avenue King of Prussia, PA 19M6

Dear Mr. Grier:

This L.E.R. concerns loss of a main steam line radiation monitor j while a half logic trip was inserted due to another monitor being inoperable. (

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I Governing Tech. Spec. is Table 3.1.1. . L