ML17275B226

Corrected Ltr Superseding Previous Ltr Re Chugging Load- Revised Definition & Application Methodology for Mark II Containments (Based on 4TCO Test Results), 810721 Technical Rept

ML17275B226
Person / Time
Site:	Columbia
Issue date:	09/01/1981
From:	Verderber J BURNS & ROE CO.
To:	Eltawila F Office of Nuclear Reactor Regulation
References
NUDOCS 8109110268
Download: ML17275B226 (6)

Text

REGULATORY INFORMATION DISTRIBUTION S I'EM (RIDS)

ACCESS IOiV NBR: 8109110268 DOC OATEN': 81/09/01 NOTARIZED NO DOCKEITi 0 FACIL>:50 397 WPPSS Nuclear

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Projects Unit'i Washington Public Pose 05000397 AUTH',NAME'UTHOR AFFILIATION VERDKRBKRiJ'.J. Burns L Roe'o ~

RECIP ~ VAMKI RECIPIENT AFFILIATION ELTAAILAjF ~ Office'f Nuclear Reactor Regulationi Director~

SUBJECT:

" Corrected ltr superseding previous ltr re'Chugging load Revised Definition L Application Methodology fori Mark~

(based on< 4TCO test>> r esul ts) i" 810721 te'chnical< II'ontainments r ept.

DISTRIBUTION CODE'e B001S COPIES RECK>IVED:LfR 'NCL 'IZE!:

PSAR/FSAR AMDTS and Related Correspondence 'iITLKi:

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185 Crossways Park Drive a Woodbury, New York 11797 a Telephone (516) 6?7-4000 TWX 510-221-2195 n Cable BURNS ROE WDBY

Subject:

W. O. 3900 Main Office Washington Public Power Supply System 550 Kinderkamack Road Oradell, New Jersey 07649 WNP-2 (201) 265-2000 NRC Request for Burns and Roe Documents Referenced in the "Chugging Report" September 1, U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D. C. 20555 Attention: Mr. F. Eltawila

Reference:

(a) "Chugging Load Revised Definition Application Methodology for Mark II 4h Containments (based on 4TCO test, results},

Technical Report, July 21, 1981, Prepared by Burns and Roe, Inc., for Application to WPPSS-WNP 2.

Gentlemen:

In conversation with Mr. E. Fredenburg of the Washington Public Power Supply System, your office requested copies of two Burns and Roe documents identified as References 17 and 19 in Reference (a) above.

The Reference 17 document presents results of a study performed by Burns and Roe for General Electric Company.

We have initiated efforts to obtain permission from Genexal Electric Company to submit the Reference 17 document to the Commission. In the meanwhile, you may wish to note that this study examined in more detail the improVed modeling techniques and structural analysis methods presented in Chapter 7 of our Report entitled nSRV Loads Improved Definition and Application Methodology for Mark (Reference ll of the Reference (a} report) and provided II Containments" additional comparisons of predicted responses with measured responses. The conclusion reached in Section 7.5 of this document namely, "The agreement. between the measured and predicted building response is quite good in terms of both amplitude and frequency" is reinforced by the Referenced 17 study.

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Page 2 U. S. Nuclear Regulatory Commission September 1, 1981 The Reference 19 document, presents results of Fukushima Dai-Ni Unit 3 containment response analysis to the LOCA steam condensation loads performed by Burns and Roe for the Toshiba Corporation. It is referred to in the footnote on page 62 of the Reference (a) report in relation to the justification of this 1.17 factor applied to JAERI data shown in Figure 5-6 of the Reference (a) report. As such, the entire Reference 19 document is not needed to review the Reference (a) report. To assist you in your review process, instead of the entire Reference 19 document, the complete information required for justification of the 1.17 factor is provided in the attachment to this letter entitled, "Reduction Ratio for Pool Boundary Pressures to Accsunt for Reduction in Number of Vents from Seven to Six in a 20 Segment of the Pool."

Very truly yours, JJV/IZ/dr John J. Verderber Attachment 4 copies Project Engineering Manager cc: Messrs. C. J. Andersen NRC 1 R. Aulick NRC 1 B. A. Holmberg WPPSS 1 E. Fredenburg WPPSS 1 1 Revised as shown

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Please find the attached letter with minor editorial corrections as noted.

This letter is to supersede the prev'ious one'.

Sorry for the inconvenience.

Thank you