ML20140F567

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Revises 851213 Response to NRC 851105 Request for Addl Info Re Generic Ltr 83-08,Question 2 Concerning wetwell-to- Drywell Vacuum Breaker Analysis.Load Factor Used in Calculation 1.06 Not 1.07,based on Info in GE
ML20140F567
Person / Time
Site: Brunswick  Duke Energy icon.png
Issue date: 03/28/1986
From: Zimmerman S
CAROLINA POWER & LIGHT CO.
To: Muller D
Office of Nuclear Reactor Regulation
References
GL-83-08, GL-83-8, NLS-86-085, NLS-86-85, NUDOCS 8604010089
Download: ML20140F567 (1)


Text

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CD&L Carolins Power & Light Company SERIAL: NLS-86-085 MAR 2 81986 Director of Nuclear Reactor Regulation Attention: Mr. Dan Muller, Director BWR Project Directorate //2 Division of BWR 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 MARK I CONTAINMENTS (GENERIC LETTER 83-08)

Dear Mr. Muller:

~

On December 13,1985, Carolina Power & Light Company (CP&L) responded to your staff's request for additional information, dated November 5,1985, concerning Generic Letter 83-08. Question 2 of that request dealt with the Brunswick wetwell-to-drywell vacuum breaker analysis. Specifically, the Company was to verify that 1.07 was the load factor used in calculating the underpressure. Based on information received from General Electric, CP&L stated that the load factor used in the calculation was 1.07. In a letter dated March 3,1986, General Electric informed the Company that the actual load factor was 1.06. They also stated that the 1.06 load factor yields a conservative prediction of underpressure.

Carolina Power & Light Company regrets any inconvenience this error may have caused. Please refer any questions regarding this matter to Mr. Stephen D. Floyd at (919) 836-6901.

Yours very truly, f S. merman faca:e-Manager Nuclear Licensing Section SRZ/ MAT /ccc (3530 MAT) cc: Mr. W. H. Rutand (NRC-BNP)

Dr. J. Nelson Grace (NRC-RII)

Mr. E. Sylvester (NRC) l 1

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411 Fayettevifte Street

  • P O Box 1551
  • Raleigh N C 27602

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