W3P85-1103, Discusses Confirmatory Evaluations of Paint Coating Fragments on Safety Injection Sys Sump & Postulated Particle Size Failure Characteristics of Paint Coatings,Per Sser 10.Responses in 850117 & 0227 Ltrs Adequate
| ML20112H415 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 03/29/1985 |
| From: | Cook K LOUISIANA POWER & LIGHT CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| W3P85-1103, NUDOCS 8504020250 | |
| Download: ML20112H415 (2) | |
Text
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N=W CALeANS LOueANA 70174-8008 9 (504)380-9345 MIDDLE SDUTH March 29, 1985 W3P85-1103 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, W3P85-0449, dated February 27, 1985 2.
LP6L Letter, W3P85-0130, dated J.inuary 17, 1985
Dear Sir:
The confirmatory evaluations specified in the referenced letters have been completed. The confirmatory evaluations entailed a three dimensional analysis of the postulated near field effect of paint coa hng fragments on the Safety Injection System Sump and a confirmatory evaluation of the postulated particle size failure characteristics of the paint coatings used at Waterford Unit 3.
The results of these evaluations confirmed the conclusions stated in the referenced letters.
Specifically, the 3D analysis confirmed that the 2D analysis yielded more conservative Safety Injection System Sump screen blockage results, and the paint failure evaluation confirmed that the 0.078 inch paint fragment size assumption was a conservative basis for evaluating the effects of the postulated ingestion of paint into the Reactor Coolant System.
In summary, the bases and the conclusions made in the referenced letters remain conserva-tive and valid.
LP6L believes that the information provided in references one, two, and herein provide substantial assurance that the postulated failure of palnt coatings will not adversely affect the performance of post accident fluid systems, and therefore the paint coating issue identified in SER Supplement 10. Section 6.1.2, should be confirmed closed.
8504020250 050329 0
ADOCK 0500 2
gDR 1
Mr. G.W. Knighton.
W3P85-1103 Page Two t
Please feel free to contact me or Robert J. Murillo, Safety and Environmental Licensing Unit Coordinator, should you have any questions.
Your very truly, l-K.
ook Nuclear Support & Licensing Manager KWC/RJM/pcl cc:
E.L. Blake, W.M. Stevenson, R.D. Martin, D.M. Crutchfield, J. Wilson, G.L. Constable l
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