W3P85-1149, Forwards Rev 1 to Evaluation of Potential Adverse Effects of Failure of Containment Coatings on Post-Accident Fluid Sys, Per Util 850227 Commitment.Explanatory Info on Three Dimension Analysis Provided in Sections IV & V of Rept
| ML20116N519 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 04/25/1985 |
| From: | Cook K LOUISIANA POWER & LIGHT CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20116N524 | List: |
| References | |
| W3P85-1149, NUDOCS 8505070241 | |
| Download: ML20116N519 (1) | |
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$1UhdSYS April 25, 1985 W3P85-1149 3-A1.01.04 A4.05 Director of Nuclear Reactor Regulation Attention:
Mr. G.W. Knighton, Chief Licensing Branch No. 3 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C. 20555
SUBJECT:
Waterford SES Unit 3 Docket No. 50-382 Confirmatory Evaluations of the Postulated Failure of Containment Coatings
REFERENCES:
1.
LP&L Letter, W3P85-1103, dated March 29, 1985 2.
LP&L Letter, W3P85-0449, dated February 27, 1985 3.
LP&L Letter, W3P85-0130, dated January 17, 1985
Dear Sir:
LP&L conducted evaluations to address the potential adverse effects of the postu-lated failure of coatings inside containment on post-accident fluid systems.
These evaluations were provided to the NRC by letters dated January 17 and February 27, 1985, references two (2) and three (3). The NRC concluded on the basis of the LP&L evaluations that the postulated coating debris generated under DBA conditions would not impair post accident fluid systems performance, reference SSER 10, section 6.1.2.
LP&L also committed in reference two (2) to conduct further confirmatory evalua-tions, 3D analysis and paint failure mode evaluation. LP&L conducted these evaluations, and LP&L via reference one (1) provided formal confirmation that the 3D analysis and the paint failure mode evaluation further substantiated the conservatism and validity of the original evaluations. Accordingly, as requested by the NRC, this letter provides explanatory information on the 3D analysis and the paint failure mode evaluation. This information is provided in sections IV and VII of the enclosed report. The report has also been updated to include the evaluation provided by reference two (2). Please feel free to contact me or Robert J. Murillo, Safety and Environmental Licensing Unit Coordinator, should you have any questions.
[h 05g25 85 Yours ery truly, P
K.~ W. Cook Nucicar Support & Licensing Manager KWC/RJM/pc1 00 Attachment j
cc:
E.L. Blake W.H. Stevenson, R.D. Martin, D.M. Crutchfield, J. Wilson, G.L. Constable t.