ML18046A692

Discusses 810801 Completion Date for Submittal of Final Response to NRC 810227 Request for Addl Info Re C-E Owners Group Final Rept Re Asymmetrical LOCA Loads.Seismic Analysis for Load Combinations Is Needed

ML18046A692
Person / Time
Site:	Millstone, Calvert Cliffs, Palisades, Fort Calhoun
Issue date:	05/26/1981
From:	Lundvall A BALTIMORE GAS & ELECTRIC CO.
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
NUDOCS 8106030254
Download: ML18046A692 (2)

Text

1\. ARTHUR E. LUNDVALL, .JR. ** CHARLES CENTER* P.O. BOX 1475 *BALTIMORE, MARYLAND 21203 26, 1981 VICE PRE:SIOE:NT SUPPLY Office of Nuclear React0r Regulation U. s*. Nuclear Regulatory Commissi'on Washington, D. C. 20555 . -Attn: Mr. D. G. Eisenhut, Director Division of Licensing

Subject:

Calvert Cliffs Nuclear Powe nt Units Nos *. 1 & 2, Dockets Nos. 50-317 & 50-318 Palisades Nuclear. Power Plant, Docket No. 50-255 Fort Calhoun Nuclear Power Plant, Docket No. 50-285 Millstone*

Nuclear Power Plant Unit No. 2, Docket No. 50-336

'Request -References*: (a). NRC letter dated 1/25/78 from Mr. V. Stello, Jr., to All PWR Ltcensees Regarding Asymmetric LOCA Loads *. Gentlemen:

Cb*r BG&E",letter dated 6/30/80 from Mr._ A. E. Lundvall, Jr., t0 Mr *. D *. G *. Eisenhut, same* subject .. (c r BG&E letter dated 7 /31/80 from* Mr *. A *. E *. Lundvall, Jr., to Mr., D., G._ Eisenhut, same* subject *. . {a,):* NRC l,etter. dated 2}23/i81 from, Mr *. D. M *. Crutchfi'eld to Mr..,. A.".*E-., Lundvall, Jr *. , same subject. In-an eff0rt to respond to the.requirements*

of Reference (a):, Baltimore Gas and Electri'c, Northeast Uti'liti'es, Consumers*

Power and the Omaha Publtc Power Di'strict submitted in References

(.b} and Cc) the Combustion Engineering Owners ,. Group Final Report. Reference (d) required the Combusti'on Engineering Owners-'*

Group to provide additi0nal information concerning this* report within 90 days of receipt of Reference (d) *. This request for additional information was received on February*

27, 1981. Pursuant to this* request, we prepared preliminary*

responses, to those quest*i'ons*.

listed in Reference* (dr, whiCh' :i:nvobred a clar.ifi'cation or a detailed explanation of* the* methods-and results-presented in References-and (c r. 0ri Apri'l 15-, 1981, the Combusti'on Engineering Users Group and their techni*cal consultants*

di'scussed thes*e* preliminary responses with: *meml:i'ers*

of the NRC Staff. At this meeting, the CE Owner.s*'*

Group stated that due* to the* time constraints*

inv0l ved in resp0nding to the* 108 questions*

and requests listed in Reference Cd r' our submittal could be de;]_ayed unti'l August 1, 1981. Also at that time, we-indicated our int.ent to* submit this* response*

as, early* as* possible*

• . '*

-.e Mr. D. G *. Eisenhut Page 2 May 26, 1981 At this time, our schedule for submittal remains as previously stated, provided that additional questioning concerning the final report is* held to a minimum. This schedule is also dependent upon a resolution of the outstanding i's sue* of load combinati'on..

As di'scussed with your staff at the* Apri'l 15, 19_81, *meeting, load combinations, could si'gni'f'tcantly extend the schedule for completion of this* effort due* to the: lack ofa seismic analysis for fuel (and internals*

for some* plantsT. Our presentation" of April 15' 1981, included a discussion of our position, support"ed by a recently issued . Sandia Laboratories

• report, that the probability of simultaneous*

occurrence of an asymmetric LOCA loading event and a seismi'c event is on the order of lo-1 2 per year; therefore*, the probability*

of the occurrence of these* events :i:s* too small to constder the consequences*.

The position presented by* the* CE Owners* Group at the 4/15/81 meeting has* not been formally*

addressed by* the staff!.. It i's in our mutual best i'nterest to accelerate.

ef'!forts*

to resolve* thi's*

We: are* prepared to discus*s, this, tssue* wi'th. you* a,t your earliest convenience*..

• cc: Ji. A *.

Esquire:*

• G *. 'l" *. Tr.owori:dge.,

• Esquire Mn *.

L.

Jr *. Messrs. P. W. Kruse -CE G. F. Pratt -Consumers Power Co. A. Purie -Northeast Utiliti"es Co. S. U. Kahn -Omaha Publtc Power District