ML19220B491
| ML19220B491 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/05/1975 |
| From: | Silver H Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7904260387 | |
| Download: ML19220B491 (6) | |
Text
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UNITEo STATES NUCLEAR R E GU LATO R Y COMMISSION W ASHIN GToN. o.
C.
20555 September 5,1: 75 DCCKET NO:
50-320 APPLICANT:
Metropolitan Edison Company FACILITY:
Three Mile Island Unit 2 SD! MARY OF MEETING CN ADDITIONAL ELECTRICAL & CONTAINMENT ITEMS Representatives of the applicant met with me=bers of the NRC staff on 3-21-75 to discuss the additional electrical and containment syste=s questions in our letter of July 30, 1975, which are attached for reference.
222.40 - The applicant requested cicrification of what was meant by
" balance of plant Class IE equipment" The staff defined this as equipment in ESF and safety relcted systems, and noted that the question is intended to deal with seismic and environmental qualification.
Specific items of equipment were discussed; for exa ple, the Reactor Building Air Cooling Fan motor has been tested in the post-LOCA environ =ent, according to the applicant. The staff indicated that the Franklin Institute test was acceptable for valve operators.
012.16 - The applicant indicated his objection to replying fully to the position, and noted he will limit his resIcnse to a discussion of the extent of conformance of the purge syste:
8.th the position. He also noted that 90 hours0.00104 days <br />0.025 hours <br />1.488095e-4 weeks <br />3.4245e-5 months <br /> of purging per year during reactor operatien could be a considerable proble=.
'n. _
,c Harley
' /er, Proj ect Manager i
Light
- Reactors Bran;h 2-2 Divisio., of Reactor Liter. sing
Attachment:
Electrical 5 Containment Systems Questions List of A::endees i3042603f7
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ATTACHMF2T IEREE MILE ISLAND NUCLEAR STATICS, UNIT 2 REGULATORY POSITICNS AND REQUESTS FOR ADDITICNAL INFCPotATICN JULY 30, 1975 i
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222-1
'222.0 ELECTRICAL INSTRDENTATICN 5 C2NTAINMENT SYSTEMS 222.40 The staff requires that the.follcwing qualification tes (3.11) program informaticn be provided for balance of plant Class (7.0)
IE equip =ent.
(8.0) a) Equipment Design specification require ents,
b) Test Plan,
-T Test Setup,
- 2) Test procedures, and e) Acceptability goals and require =ce.s.
This information shall be provided for at least ene item in each of the following groups of Class IE equipment, including test results.
a) Switchgear b) Motor centrol centers,
c) Valve operators (in contain=ent) d) Motors e)
Logic Equipment f)
Cable, and g) Diesel Gertrator Control, equipment.
It is not necessary to respond to any aspect of the above ites which has been previcusly addressed.
222.41 Provide your design criteria and precedures for fire s: cps (None) and seals. Your response should address but not be limited to the folicwing:
a) Cable and cable tray penetrations thrcugh walls and floors, and all other types of cable ways or conduits.
b)
Design criteria for each type cf fire stop rad seal installation, c)
Interval (physical distance) at which the fire stops are installed in vertical cable trays, and in hori: ental cable trays (if any).
d)
List of naterials used and'their characteristics with regard to fla:mability and fire retardancy and their fire underwriters rating.
e)
The QA and test procedures used to verify that penetration fire s: cps and seals have been properly installed.
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222-2 222.41 f) it.e qualification testing of the fire s: cps and seals
(.o n e,
to de=onstrate adequacy ever the life of the plant.
(cont'd) g)
The ad=inistrative procedures xnd controls that will be followed when it becc:es necessary to breach a ec=pleted fire stop or seal to add or renove cables h)
The periodic inspectiens perfor:ed to identify open or deteriorated fire stops and seals :
In additien evaluate the adequacy of your design with regard to fire ha:ards in areas of cencentration of electrical cables.
Identify the area involved and describe the fire detection and protection system and equip =ent provided to centrol and extinguish cable fires and to assure that fire in one system will not propagate to another redundant system.
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ATIAOBiENT LIST OF ATTE.NDEES NRC H. Silver D. Shum F. Ashe GPU J. Vann J. E. Kunkel Bums 5 Roe A. G. Lainick Hans G. Kern g- (.'
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