ML20235E380

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Requests Listed Addl Info Re Design Rept 4 Concerning Seismic Analysis of Primary & Secondary Containments
ML20235E380
Person / Time
Site: Brunswick, 05000000
Issue date: 12/28/1970
From: Morris P
US ATOMIC ENERGY COMMISSION (AEC)
To: Jackie Jones
CAROLINA POWER & LIGHT CO.
Shared Package
ML20235B311 List: ... further results
References
FOIA-87-111 NUDOCS 8709280091
Download: ML20235E380 (5)
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Docket' Nos. 50-324 and 50-325 CPPR-67 and 68 Carolina Power & Light Company ATTN: Mr. J. A._ Tones Senior Vice President Engineering & Operating Group 336.Fayetteville Street Raleigh,' North Carolina 27602 Gentlemen:

With' your letter dated November'9, 1970, you provided forty copies of a document'containing the following 7esign Reports:

1. 9esign Report No. 4 'BSEP DR-4) titled " Seismic Analysis of the Primary and Secondary Containments."
2. Design Report No. 5 'BSEP 9R-5) titled " Final Report, Test Fill Program Results and Backfill Recousnendations for Class I Backfill, Brunswick Steam Electric Plant, Southport, North Carolina."'
3. ~ Design Report No. 6'(BSEP DR-6) titled " Final Report, Test Fill

. Program Results and Backfill Reconnendations for Class II Backfill, Brunswick Steam Electric Plant, Southport, North Carolina."'

To complete our review'df the above described document in connection with j our review of those metters on the Brunswick Plant that were deferred for resolution during construction, we need additional information on the matters addressed'in Design Report No. 4. The specific information requested is described in the enclosure.

A timely conclusion of our review of this matter requires that you submit the requested information as soon as possible. 'Please contact us if you desire additional discussion or clarification of the material requested.

Sincerely.

Ori;in:1.icn:d by F. Schrx 'er e er A. Po M s O actor

.0709280091 PDR pogg 870921 -[ Division of Reactor Licensing NENZB7-111 PDR /

Enclosure:

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i Carolina Power & Light Company 2

Enclosure:

Request for Additional Information cc: George F. Trowbridge, Esq.

Shaw, Pittman, Potts, Trowbridge & Madden 916 17th Street, N. W.

Washington, D. C. .

200 %

Distribution:

Docket (2)

AEC PDR (2)

'DR Reading DRL Reading BWR-1 File .

CKBeck MMMann SHanauer FSchroeder.

RSBoyd RDeYoung.

DSkovholt TRWilson EGCase RRMaccary PWHowe ,

BGrimes DRL/DRS Br. Chiefs SMKari WRButler DKartalia, OGC Compliance (2)

ACRS (16)

WNyer (2)

Newmark & Hall (2)

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l REQUEST FOR ADDITIONAL INFORMATION DOCKET NOS. 50-324 & 50-325 l l

1. The assalyses using the single degree of freedom modal method described in Design Report No. 4 may not be adequate for the multi-mass Brunswick System. Provide the basis for and indicate the conservatism in the use

-of this method by demonstrating that the results obtained are equivalent l to those obtained by a multi-mass time history method applicable to I i

the Brunswick site, 2., Provide the design criteria to be used to account for conditions that are present when the structure, equipment and piping are in resonance with each other.

3. Provide the design criteria and analytical procedures applicable to piping that take-into account the differential movement between floors and equipment at different elsvations.
4. In Section VI-5.0 of Design Report No. 4, you state that seismic testing will be- performed for systems and components that are not readily analyzed.

Explam why seismic testing will not be performed on all vital systems aed components except where it is impractical or impossible to do so.

.5 In Section VI-8.2-a-1 of Design Report No. 4, you specify an upper bound of "...less than 0.5 g..." for seismic testing. What i5: the lower bound acceleration for these tests?

6. Explain why the proposed seismic testing program for vital instrumentation and control equipment does not include operating mode tests to determine if spurious a: tion, or system failure, will result.

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l Docket Nos. 50-324 [ gMc M* " * \

CPPR-67 nd 6 Mb#

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Carol Power & Light Company  ;/

ATIN: b J. A. Jones y Se r Vice President /

Engineering Operating Group /

336 Fayettevi le Street

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Raleigh, North %rolina 27602

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Gentlemen:

With your letter dateh November 9,1970, you provided forty ) copies of a document containing the foll,owing Design Reports:

~

1. Design Report No. 4 (BSEP DR-4) titled " Seismic Analysis of the Primary and Secondary, containments."

. /

2. Design Report No. 5 (BS DR-5) titled " Final Report, Test Fill Program Results and Ba fill Recounsendations for Class I Backfill, Srunswick Steam Elect c Plant, Southport, North Carolina."
3. Design Report No. 6 .BSEP DR-6) titled " Final Report, Test Fill

/ Program Results and Backfill Recoussendations for Class II Backfill, Brunswick Steam El ctric Plant, Southport, North Carolina." -  : ,

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__ ___f eview of the above described documen we heardensad 2_

6 addition ~ infor:sstion on the matters dddressed, n Design. ,-

Report No. 4. ~0 7 o a (p th r milar- that ti (/  ;

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cs A timely con usion of our review of this matter requires that you sub-mit the re sted information as soon as possible. Please ,._11 _ i h /J b /

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Sincerely,

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REnUEST FOR ADDITIONAL INFORMATION j

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_ DOCKET NOS. 50-324 & 50-325 ,,- ,7 jf

1. The emara=9 M the single degree of freedorar mo$ method

,./ ':x h<h, multi-mass Br swickDesign described in t!ER System.Report No. 4 may not be adequate for the C{

the conservatism Provide the basis for and indicate Qquer:1: a . - in the use of this method by demonstrating theBrunswicksitehJ a gulti-mass time history method applicable '/ % / Q to

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Provide the design criteria to be,osed to account for conditions that -

with each other.are present when the sebycture, s'quipment and piping are N..'A' in resonance

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3. Provide the design criteriar#

ded analytical procedures applicable to piping that take floors and equipment at into ace 'nt the differential movement between ifferents, eleva tions.

4.

willbhperformedfo,rsgtysandcomponentsthaInSectionVI-5.0 are not readily analyzed.

all vital syst M ::LbCi r wnf' n seismic testing '

and components except wh'ere it oc h be performed on to do so. He .4, L,- .< ' s impractical or impossible

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5. In Section bound the low of ' . . . less than 0.5 g. . ." for seismic W :: testing.I-8.2-a-1 of D bound decelerations for these tests? '

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6. '"

S and Q f' f why the proposed seismic testing program for vit if ontrol equipment does not include operating mode test.g to determine purious action, or system failure, will result.

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