ML20234B777

Forwards Listed Category B Rept on Proposed Inservice Insp Program & Proposed Containment Design Pressure for Plant.W/O Rept

ML20234B777
Person / Time
Site:	05000000, Brunswick
Issue date:	04/01/1970
From:	Hard J Advisory Committee on Reactor Safeguards
To:	Bush S, Seiss C Advisory Committee on Reactor Safeguards
Shared Package
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References
FOIA-87-40 NUDOCS 8707060204
Download: ML20234B777 (2)

Text

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C. P. Siess, Chairman i

Brunswick Subcoarnittee S. H. Bush, Vice Chairman, ACRS CATEGORY B REPORT - EEUNSWICK - REPORT ON PROPOSED INSERVICE INSPECTION i

PROGRAM AND PROPOSED CONTAINMENT DESIGN FRESSURE 7/OR THE MUNSWICK PLANT j

the listed report has been sent to you and all other members previously as a Category A item.

CP6L's proposals involve both the inservice inspection program and a change in containment design pressr.re. I assume the Regalatory Staff will be reviewing both these proposals. Discussion with the Staff on the latter one has been scheduled for the 120th meeting.

The report abould be retained in your permanent set of Brunswick documents.

ORIGIR.L SIGr:2 EY E. W. IISE:IE

, *#J. E. Hard S

Senior Staff Assistant l

Attachment:

(CP&Ultr dtd 3/9/70, w/ Report on subject above)[2it, [X,4/Mg/

Sanmaary cc: Remainder ACRS Members, w/ attachment FILE:

Brunswick project & Category B files omet >

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s 7060]O4 8706 O Form AEC-518 (Rev. 9-53) AECM 0240 o v. s. so.s== urn t enin vi s o rric THOMAS 87-40

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0FFM l!SE ON.Y aramerick In a Merch 9.1970.1stter, CEL trosemitted a sepest f p to DEL obick consisted of a proposed inservice W g ties program med a y., -:M sheage in oostainment de 3

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sism pressure.

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The inspecties program oss a enemitment at the time af C.P. review. ARE Secties II was need as a finst guide in the program development. Provisions are to be made for inopoetability where peasible; for amonple, throedi the see of remeeable teemisties. CP6L states, hauever, that si.nes the remeter estits are typical of earlier de-signs that did met consider Section II requirements, 100r, secess to all vessel areas is not possible.

The change la omstata===t design pressure is from 62 pois to 53 pois ODC& pressure is 45.1 psig). Cp6L states that the change is proposed because it is esasistemt with cur-rent practice, is more ocemenical, makes the containsemt easier to construct, redeces peak liner stress, skille still retaining substsetial safety margins. For comparison, CPGL proveded the fe11eering suuhers:

Brosarick jeg,cb, Eber dam JR,,2, gjl,g Design pressure 53 psig 62 48 47 47 Accid. pressure 45.1 peig 46 42 "3'9,5 42 Prairie Is.

46 46 Discussies with the Reguistory staff has been schad=1od for the April,1970 Acts mootias, i

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