ML20245D266

Requests That Project Managers for Listed Plants Notify Respective Utils of Potential for Unqualified Penetrations. Licensee Should Verify Qualification & Rept Results by 880422

ML20245D266
Person / Time
Site:	Byron, Arkansas Nuclear, Braidwood, San Onofre, Midland, LaSalle, 05000000
Issue date:	04/15/1988
From:	Crutchfield D Office of Nuclear Reactor Regulation
To:	Calvo J Office of Nuclear Reactor Regulation
Shared Package
ML20245D268	List: ML20245D266 ML20245D397 ML20245D962
References
GL-88-07, NUDOCS 8805030502
Download: ML20245D266 (2)

Text

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UNITED STATES

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%7. ..w.C*T/ April 15, 1988 PEMORANDUM FOR: Jose Calvo, Project Director 9 Project Directorate IV, DRSP J

Kenneth Perkins, Project Director Project Directorate III-3, DRSP George Knighton, Project Director Project Directorate V. DRSP FROM: Dennis H. Crutchfield, Director.

Division of Reactor Projects III, IV, Y and Special Projects i

SUBJECT:

ENVIRONMENTAL QUALIFICATIONS OF BUNKER RAMO CONTAINMENT P Please have your Project Managers (PMs) for the plants listed in the enclosure notify their respective utilities of the potential for unqualified penetrations.

(see Enclosure 1) and request the licensee to verify qualification and reoort-the-results to the PMs by April 22. 1988.

In those instances in which licensees find that they do have Bunker Ramo penetrations' installed and that there is no qualification information beyond that already.found unacceptable. licensees-

.should be instructed to declare the penetration " unqualified". Continued operation with " unqualified" equipment can be justified if the guidance in

' Generic Letter 88-07 is met. This memorandum is being provided to-the Office.

of Special Projects for information only. We were necently infonned that tne Comanche Peak plants may have already replaced their penetration.

1 Dennis M. ch , rector Division of React ]r Pr ,ects III, IV, V and Special Projects

'cc: G. Holahan G. Dick, Arkansas 1 L. Olshan, Byron 2 T. Alexion, Callaway (cggcy. guEp ] i e ansk a le &E yo NI E NEEDE9 C. Trammell, San Onofre 1 /

P. O'Connor, Wolf Creek J. Wilson, Special Projects k4U* j CONTACT:

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F. Apicella, NRR/0RSP 492-3021

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l ENVIRONMENTAL QUALIFICATION (EQ) 0F BUNKER RAM 0 CONTAl_HMENT PENETRATION The. piece of equipment under review is a Bunker Ramo manufactured instrument penetration used to provide access throygh the containment wall for -

circuits that carry electrical signals from instrumentation inside the containment to main control room indicators and protective circuitry while maintaining the integrity of the containment pressure boundary.

During a Pegional EQ inspection at Braidwood 2 conducted in February and March 1988, it was discovered that the EQ files for four Bunker Ramo containment penetrations assemblies did not contain the documentation r.ecessary to demonstrate EQ. Further discussion with the licensee lead the staff to conclude that CQ had not been demonstrated for the assemblies in question for the following reasons:

1. Unacceptable insulation resistance values were recorded and identified as

" anomalies". Of 81 measurentents taken, only 14 were at the design minimum value of 106ohms or higher (17".). The referenced tests were Braidwood 2 Test Report 123-2220 Rev. 4 dated 10/10/79 and Test Report 123-2159-18 Rev. I dated 6/10/79 (Table V). Although the suspected " anomalies" were corrected by replacing terminal blocks with oualified splices, no followup testing was conducted te Pmw,trate qualification.

2. Insulatict- asistance (IR) readings taken in other tests were not taken at a frequency consistent with IEEE Standard 323-1974 (Staff concluded one IR measurerrent taken 8 or 16 to 20 hcurs into the test does not demonstrate qualification as discussed in IEEE Standard). MIDLAND EQ test report (f123-2201 Rev. A)

Staff believes this issue has generic implications and we have been inforred that at least the folicwing plants have Bunker Raro penetration assevblies.

L1'alle 2 Pyron ? San Onofre 1 a

rta sas 1

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