ML19329C719
| ML19329C719 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 06/09/1975 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Roe L TOLEDO EDISON CO. |
| References | |
| NUDOCS 8002180212 | |
| Download: ML19329C719 (3) | |
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. 9 1975
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3 DISTRIBUTION Docket File' ACRS (14)
NRC PDR -
JPanzarella Docket ?;o. 50-346 Local PDR-JRBuchanan, ORNL L*4R 2-3 Rdg TBAbernathy, DTIE VAMoore RDeYoung
'f[h{h FCchroeder D
Toledo Edison Comany ATT:i:
Mr. Lovell'E. P.ou AKenneke
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Vice President RKlecker b[ ub' }i 2 g;
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Facilitics Developent
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300 Edison Plaza OELD J&
JUL!10_J Toledo, Ohio 43652 OI&E (3)
LEngle EG u1 bourne Gentic en:
ASchwencer
' e request that the two itens providad in the enclosure to this ictter be 2ddressed u part of the Appendix K ECC3 subnittal for the Davis 2, sse
?Iuclear Pear.
tien, Uni: 1.
':r. L. Engle, the Licensing Progract Managcr for Davic Besse, 1: 1, has already contacted "r.
C. Novak and infer:aed hin of.his need for additional infernation concernin3 your dCC5 aubaittal.
Tn cr.ler to viintsin our licensin?, achedule, uc will need your rneponse to the enclosurn by Jaly 9, 1975.
If you cannot nect thia late, please inforn as within scven da:rs after receipt of this letter so that we nav reviae our scheduling,.
Please contact us if you have any questions ragarding the ancic,ure provided.
Sincerely, N
ogna\\ SY t echnenC?f A. ;ichwnccr, Chicf Li;ht Jater ?cactors Tiranch 2-3 Division of 'teactor Licensing
Enclosure:
Request for' additional inforsation concerning ECCS nubmittal 17(.,, CI v
cc: Sec next page cd i y\\
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l JUN 9 1975 l
Toledo Edison Company 1 i
cc: Donald H. Rauser, Esquire The Cleveland Electric Illuminating Co.
I P. O. Box 5000, Room 610 l
Cleveland, Ohio 44101 j
Gerald Charnoff, Esquire 1
Shaw, Pit man, Potts, Trowbridge and Pfadden 910 - 17th Street, NV Vanhington, D. C.
20006 1
1 Leslie Ronry, Esquire Fuller, Sency, Henrf & Hodge 300 Madison Avenue Toledo, Ohio 43604 i
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e ENCLOSURE REQUESTS FOR ADDITIONAL INFORMATION APPENDIX K ECCS SUBMITTAL FOR THE DAVIS BESSE NUCLEAR POWER STATION, UNIT 1 DOCKET NO. 50-346 1.
If Davis-Besse will operate with a part-pump reactor coolant system configsration, this capability must be supported by identifying and analyzing the worst break size and location (i.e., idle loop versus operating loop).
In addition, suC2icient justification must be pro-vided to conclude that the shape of the PCT versus Break Size curve would not be significantly a' *.e ed by the partial loop configuration.
(A partial loop configuratio.
, defined where one or nore reactor coolant pumps are not operating.)
2.
It has recently come to our attention that after a LOCA, the operabil-ity of certain critical systems =ay be jeopardized due to the location of certain related components (such as valve motors, busses, etc.) at or near the containment floor.
Post-LOCA flooding of the containment could submerge these components and could involve such essential safety features as the safety injection system, containment isolation network, or systems needed to limit boric acid concentration in the reactor vessel during long-term core cooling. The following information must i
be supplied:
a) Whether or not any components, such as valve motors or electric busses, will be submerged following a LOCA in Davis-Besse 1.
b)
If it is determined that such components will be flooded; 1.
Identify this equipment.
2.
Evaluate the potential consequences of flooding of this equipment for both the short term and long term.
(Long term should include consideration of the, potential problem of excessive concentrations of boric acid).
3.
Propose design changes to solve the potential flooding problem.
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