W3P84-3319, Forwards Rev 2 to Summary Evaluation Structural Significance of Basemat NDT Results, Supplementing Addl Info Provided in & Per NRC 841120 Meeting.Cracks Do Not Affect Basemat Integrity
| ML20099L249 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 11/28/1984 |
| From: | Cook K LOUISIANA POWER & LIGHT CO. |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20099L252 | List: |
| References | |
| W3P84-3319, NUDOCS 8412010064 | |
| Download: ML20099L249 (2) | |
Text
a Louisiama P O W E R & L i G H T f NEW ORLEANS LOUISIANA
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. (504)366-2345 MIDDLE SOUTH NES SWEM November 28, 1984 W3P84-3319 3-A1.16.07 A4.05 Director of Nuclear Reactor Regulation ATTN:
Mr. Dennis M. Crutchfield, Asst. Director for Safety Assessment Division of Licensing U.S. Nuclear Regulatory Commission Washington, D. C.
20555
SUBJECT:
WATERFORD 3 SES ADDITIONAL INFORMATION ON BASEMAT IIAIRLINE CRACKS
References:
Letter W3P84-3142, K. W. Cook to D. M. Crutchfield, dated November 7, 1984.
Dear Mr. Crutchfield:
The purpose of this letter is to supplement the additional information provided in the referenced letter. This information was requested by the NRC and Brookhaven National Laboratory personnel at a meeting in Bethesda, Maryland on November 20, 1984.
Attached is Revision 2 of the report entitled " Summary Evaluation Structural Significance of Basemat Nondestructive Testing Results". This revision addresses questions discussed among parties at the November 20, 1984 meeting.
Further infor-mation regarding the degree of confidence in NDT results, probable causes of cracks, mechanisms for deep narrow cracking, construction controls, shear considerations, slip resistance, etc.
Louisiana Power & Light remains firmly convinced that the cracks, as defined by NDT have no adverse affect on the structural integrity of the basemat. The basemat is fully capabic of functioning as required by the design in accordance with the pertinent codes.
Very truly yours,
- f. a. Gray K. W. Cook Nuclear Support & Licensing Manager KWC:plc ATTACllMENT
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E.L. Blake, W.M. Stevenson,-G.W. Knighton, J.M. Knight, J.H. Wilson-G.L.l Constable Project Files, Administrative Support,-Licensing Library 4
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