ML19312C648

Forwards Request for Addl Info Re Assumptions Made in B&W rept,BAW-10103.Response Required within 30 Days

ML19312C648
Person / Time
Site:	Oconee
Issue date:	09/08/1975
From:	Purple R Office of Nuclear Reactor Regulation
To:	Parker W DUKE POWER CO.
References
NUDOCS 7912190856
Download: ML19312C648 (4)

Text

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SEP 0 81975 NRK DIsTaIBinION Docket File Docket Nos.

ORBf1 Reading NRC PDR S MO Local PDR and 50-287 KRGoller w

TJCarter OELD Duke Power &, y OIGE (3)

AT'DI:

Mr. William O. Parker, Jr.

RAPurple

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Vice President CTrannnell Stoan Productica GZech

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Post Office Box 2178 SMSheppard 422 South Church Street 3RTBAbernathy Onarlotte, North Carolina SVarga-28242 J^y y t

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used for.

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the BCC5 e'..., e - avaluation of Ooonee Units l ^' J..

...T~ 1, 24 and '3 hai' identified the need for additionarinfo e

N assegrtions' ande 'im' topical report BAE10103.'

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i required la order for' us to somPlate 'our evaluatio i

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Please respond to eMa reques..

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, f receipt of this letter.

't for additional information within 30 days o

e Sincerely.

Original algned by:

Robert A. Purple Robert A. Purple, Chief Operating Reac',ars Branch 81 t

Division of Reactor 1.icensing Baclosures 1

Request for Additional Informa31om -

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Mr. William L. Porter Duke Power Company P. O. Box 2178 422 South Church Street Charlotte, North Carolina 28242 Mr. Troy B. Conner Conner, Hadlock & Knotts 1747 Pennsylvania Avenue, NW Ws;bington, D. C.

20006 Oconee Public Library 201 South Spring Street Walhalla, South Carolina 29691 s

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REQUEST TO't M 'ITTONAL _

"0RMATION OCONFE R C!J.*3 ::T.C :!!. I':I!3 1.

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3 DOCnCT ::05. 50-269/27C.257 w

The ECCS analysis for your plant is referenced to DAW-10103.

Previde justification for the folic. ting input parameters used in BAW-10103 by cooparison with the appropriate values for your plant.

1.

Not Free Contain:icnt Voltime - Justification should include the total gross internal containnent volunc and the internal structures cad c:;;ip-ocnt and their volumes which are subtracted to obtain the net free containtient volu:ac.

A discussion of the uncertaintics should be pro-vided.

2.

Pasdve har Sinha - Provide the act.ual passive heat sinh structurc; for your pinnt.

Discuss the nothod 'of determining the passive c:r. :-:.-

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tr.cnc heat sinks.

Identify each heat sink by category (i.e., cc51a

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tray, equipment cupports, floor grating, crcnc wall, etc.) and prcvidc surface arco, thickness, materials of construction, ther:tal conduccieit:

and volumetric heat capacity, by componcat category used in the cec.W.

• transient analysis code.

3.

S,t.nrrinn Tirie of containment Cooline c.vstcq(s_) - Diccuss the fact:E.e that 'r.how thrit the start time (s) ar.suced in the contain-ent re:7:n.4 2 analyr.ir. represent the earlicst prssible initiation of sy.<.tc=(:) :;:rr.

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Containment initial Cc ifdtion : - Compara the initial values of tu:g n e.'

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I pren::ure.md relative hunidit/ i.n the contair. ; cut.eith the rance rf v..-

that will 1 e pomitted during plrnt operation.

5.

Cont s.i:n. nt Sr r:iy Uat er Te: :.e r: : ur.: - Show thr.: the value cf c.:.

r. pray sc.'t er : c:.. r..:.urt er:ed in *.hn coa:. ir 'n: r.npon : : - n.S i

lever bound t. ::perature con:.J:. tent vi rh p2:. 2 L.; cratin g ec.id'.t -

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t e2-O that the spray flow rate used is suitably conservative.

6.

Fdn-Cooler 11 eat Removal R::t: - Compare the raaximum fan-cooler heat removal rate for your plant with that assurted in BAW-10103.

Sho.e that minfraum operational values of service water temperature have been used.

7.

If any of the above parauctors are less conservative for your plant than esed in the generic cvaluation of 13AW-10103, provide the sensitisiitj of these parameters to the overall containment pressure respouse.

Lis-cvaluation should demonstrate the overall conservatica of your contain-ment parameters to those used in BAU-10103.

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