ML20082N021
| ML20082N021 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 11/18/1983 |
| From: | Gerrets T LOUISIANA POWER & LIGHT CO. |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, 56, W3K83-1796, NUDOCS 8312060354 | |
| Download: ML20082N021 (4) | |
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LOUISIANA POW E A & LiG H T /Waterford 3 SES/P. O. Box B/Killona, LA 70066 November 18, 1983 W3K83-1796 Q-3-A35.07.56
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Mr. John T. Collins
- Lot Regional Administrator, Region IV j t\\ j [Yfl "
t-U. S. Nuclear Regulatory Commission li\\;
611 Ryan Plaza Drive, Suite 1000
,IR-Arlington, Texas 76012
REFERENCE:
LP&L Letter W3I83-0297 dated September 2, 1983
Dear Mr. Collins:
SUBJECT:
Waterford SES Unit No. 3 Docket No. 50-382 Significant Construction Deficiency No. 56 "RCB Liner Plate Nuclear Coatings Failure" Final Report In accordance with the requirements of 10 CFR 50.55(e), we are hereby providing two copies of the Final Report of Significant Construction Deficiency No. 56, "RCB Liner Plate Nuclear Coatings Failure."
If you have any questions, please advise.
Very truly yours, Mm T. F. Gerrets Quality Assurance Manager TFG:CNH:SSTG Attachment cc: Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C.
20555 (15 copies)
< e 8312060354 831118
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PDR ADOCK 05000382 S
PDR l
Mr. John T. Collins
-November 18, 1983 W3K83-1796 Page 2 cc: Director Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. E. L. Blake Shaw, Pittman, Potts, & Trowbridge 1800 M Street, N.W.
Washington, D.C.
20036 Mr. W. M. Stevenson Monroe & Lemann 1424 Whitney Building New Orleans, Louisiana 70130 i
FINAL REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 56 "RCB LINER PLATE NUCLEAR C0ATINGS FAILURE" INTRODUCTION This final report is submitted pursuant to 10 CFR 50.55(e) and describes a deficiency that pertained to the nuclear coatings on the Reactor Containment Building Liner Plate.
To the best of our knowledge, this problem has not been identified to the Nuclear Regulatory Commission pursuant to 10 CFR 21.
DESCRIPTION OF PROBLEM The coating problem was identified to Ebasco Corrosion Engineering and the coating manufacturer representative in July of 1981.
At that time an inspection of the walls and dome was conducted by the two aforementioned parties. Other Ebasco Construction, Q.A., and LP&L personnel accompanied on a part time-basis.
At first it was believed that approximately 5% of the RCB liner plate would require coating repair and touch-up. After this determination, Ebasco engineering personnel began an intense visual inspection of the entire liner plate. The inspection criteria consisted of marking in red the areas that exhibited any one of the criteria stated below, a) runs and sags b) pin-hole rusting c) embedded particles d) flaking or peeling After the inspection had been made and all areas marked, it appeared that more than 5% of the liner plate was suspect relative to coatings.
As a result of the inspection results, Ebasco initiated Nonconformance Report W3-3648 describing the severity of the conditions previously stated.
SAFETY EVALUATION The Corrosion Engineering Department along with an independent coating testing agency developed an in-situ DBA test-box to determine if the major portion of the coating defects on the liner plate is acceptable. No coating failures resulted from this testing program. Therefore the defects which were present and addressed in NCR W3-3648 did not compromise the safety related function of the coating system.
CORRECTIVE ACTION The Ebasco Corroaion Engineering Department delineated, through attachments to NCR W3-3648, the measures to be taken for the types of defects previously mentioned. The results of the in-situ DBA testing demonstrated that no
SCD 56 Page 2 further repair beyond those measures was required. After completion of the testing program, the site coating contractor, Sline Industrial Painters, Inc.,
began repair of the liner coating using the direction provided by NCR W3-3648 and by the coating specification, LOU 1564.734. Repair consisted of either power or hand tool cleaning or blast cleaning unacceptable areas, and recoating in accordance with specification LOU 1564.734.
All coating repairs have been completed and inspected and all supporting documentation has been verified.
This report is submitted as the Final Report.
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