ML20234B647

Forwards,For Review,Design Rept 8, Small Steam Line Break, Amend 11 Re Changes in Completion Dates & 710407 Request for Addl Info for Review of Design Repts 7 & 8.W/o Encls

ML20234B647
Person / Time
Site:	05000000, Brunswick
Issue date:	05/28/1971
From:	Hard J Advisory Committee on Reactor Safeguards
To:	Bush S, Seiss C Advisory Committee on Reactor Safeguards
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References
FOIA-87-40 NUDOCS 8707060144
Download: ML20234B647 (2)

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Ilay 28, 1971 r ~ ': ' -

t C. F. Stase Chairman Brunswick Subcommittee S. M. Bush, Chairman, ACRS CATEGORY B REPORTS - BRUNSWICK - DESIGN REPORT #6, BIEL STRAM LIIB BREAK; DEL RsQtEST FOR ABD'L IIFO FM llIVIEW W D58191 REPORTS 7 & 4; ABEMDIENT $11 RE CHANCES IN C0er1ST1001 MTES h listed reports and ny summary of the sentants are attached for your review.

Some special analyses on the contalmeent have abown that the liner gets botter for certain small steam itne breaks than for the rectremistion line break. This is because the satursted steam is at a higher pressure for the former, and consequently is better. Nonethstass, the design is still satisfactory, according to CPE. The Subcommittee may wish to re-view these aspects during the 0.L. review. should he retained in your permanent set of Brunswick documents.

Or1Einal Signed by J.T. Hard J. E. Hard Senior Staff Assistant Attachments:

1.

Summary 2.

CPE Ler dtd 2/26/71, w/ Design Report No. 8. Small Steam Line Break 3.

BRL Ler dtd 4/7/71, Raquest for Add'1 Info for Review of Design Rpts 7 & 8 j

4.

SPE Ltr dtd 4/23/71, Amendment #11 re I

Changes in Completton Dates s

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Besmoudek hasian Ramart Es. B - M is soport sospeeds to se the omhjeet of the sessit of primary intermediate praeseses. 4M & found that tbs e d,

steam line break geye higher temperatures, M8'r, h me dsynell them the restrentattaa ties bseak (Niay),

g, pressure is, of asures, leasr der the isomer. Roopomos of the dryus11 une teeted using Wilson's finite enament anthod. Seeign of the liner, stodo, and etsi spesias is shown to be goversed by the small steam lies beoek needs.

If it is aseened that eensreta seasies assenehad during this assident, the liner will not asil. If, housser, ese-arete crasking is assumed, the limar will beskne but still functism eatisfactority, asserding to the suport.

In am 4er1111971 latter. ERL regnests addittment in-forestion as Design Reporte Nos. 7 and S -- r=87 the primary sa=* ate.

Amendmaat Es.11. April 23,1971, advenees the commanial operaties date for the seemed unit from unseh 1, 1975 to mank 1,19M.

Subcommittee review of the saetatament desian analyses is ressemonded durieg the 0.L. review stage.

(se ces & se s/2s/71) l i

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