ML20138M920
| ML20138M920 | |
| Person / Time | |
|---|---|
| Site: | Brunswick, University of California - Irvine  |
| Issue date: | 12/13/1985 |
| From: | Zimmerman S CAROLINA POWER & LIGHT CO. |
| To: | Vassallo D Office of Nuclear Reactor Regulation |
| References | |
| GL-83-08, GL-83-8, NLS-85-440, NUDOCS 8512230216 | |
| Download: ML20138M920 (2) | |
Text
.,e CD&L Carolina Power & Light Company SERIAL: NLS-85-440 g
Director of Nuclear Reactor Regulation Attention:
Mr. D.~ B. Vassallo, Chief Operating Reactors Branch No. 2 Division of Licensing United States Nuclear Regulatory Commission
- Washington, DC 20555 BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS.1 AND 2 DOCKET NOS. 50-325 & 50-324/ LICENSE NOS. DPR-71 & DPR-62 MODIFICATION OF VACUUM BREAKERS ON MARK I CONTAINMENTS (GENERIC LETTER 83-08)
Dear Mr. Vassallo:
In a letter dated November 5,1985, your staff requested additional information concerning our response to Generic Letter 83-03, dated June 23,1983. Enclosure I contains the requested information.
.Please refer any further questions regarding this matter to Mr. Stephen D. Floyd at
-(919) 836-6901.
Yours very truly, ffffit n S.
. Zim 1erman Ma ger Nuclear icensing Section MAT /ccc (3094 MAT)
Enclosure cc:
Mr. W. H. Ruland (NRC-BNP)
Dr. J. Nelson Grace (NRC-Ril)
Mr. M. Grotenhuis (NRC)
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8512230216 851213 PDR ADOCK 05000324 P
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l 411 Fayettevitte Street
- P. O. Box 1551
- Raleigh. N. C. 27602
i ENCLOSUREI TO SERIAL NLS-85-440 Question 1 Is the chugging source rate used in the BSEP evaluation the same as the one developed in CDI Report (#84-3)? If not the same, provide the chugging source rate with the supporting justification.
Response
Yes. The methodology followed in CDI Report No. 84-3 is identical to the methodology used in the Brunswick evaluation.
Question 2 Did the BSEP calculation apply the 1.07 load factor to account for the uncertainty in calculating the underpressure (Section IV of the staff's generic evaluation)?
Response
Yes. The 1.07 load factor used to assure conservative prediction of the underpressure was applied to the Brunswick evaluation.
~
Question 3 Have the BSEP calculations used the drywell model which results in the most conservative prediction (Section V of the generic evaluation)?
Response
Yes. For the Brunswick evaluation the acoustic volume model results in the most conservative forcing function, and was therefore used.
(3094 MAT /ccc )