ML19294C247

Final Deficiency Rept Re Incorrect Welds on Heating, Ventilation & Air Conditioning Longitudinal Seams on Round safety-related Ductwork.Determined That Use of Lap Welded Duct Will Not Adversely Affect Safety of Plant Operations

ML19294C247
Person / Time
Site:	Grand Gulf
Issue date:	02/29/1980
From:	Dale L MISSISSIPPI POWER & LIGHT CO.
To:
References
NUDOCS 8003070368
Download: ML19294C247 (2)

Text

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. , F. . ,-, MISSISSIPPI POWER & LIGHT COMPANY Y: Helpin g B uild Missis sippi Md P. O. BOX 1640. JdCKSON. MISSISSIPPI 39205 February 29, 1960 P400WCTeON OgeanfwENT Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Region II 1 Marietta Street, ".W., Suite 3100 Atlanta, Georgia 30303 ATTN- Mr. J. P. O'Reilly, Director Dear Mr. O' Railly -

SU BJ ECT - Grand Gulf Nuclear Statien Units I and 2 Docket 50s. 50-416/'.17 File 0260/02du/15521/15525 PRO- 79 / 20, t'ina Report Incorrect Tvpc Welis en Safet- Relat ed i! .' '.C Juc t a a rk AEC"-O/22 Cr NoverJoer 23,1979, :-islissippi Po ecr & Light Cempany notifice

" r . 11. C. Dance of your office Of a pctentially reportable tim ic i.? nc' at the Graad Galf Nuclear Station constructica site. 'R e deficiency concerns incorrect type welds cn HVAC ica.;itucinal seam.s on cauad 3.n e t :-

related ductwork.

Sampic portions of duct systems with lap welds were fabricated a-d tested for reliabilit/ under seismic leads. 5c failures were noted durir:

tenting. The analysis indicated that all stresses developed were cons.derably lower than allowable levels. Based on this evaluation, it is concluded that the use cf the lap welded duct that has been Zab ricated will not adversely affect the safety of plant operations. The re f c re ,

this problem is not reportable within the meaning of 10CFR50.55(e).

Details of the corrective action for this condition are identified on Management Corrective Action Report, MCAR-GCNS 50. SS, on file at the jobsite. ,

Yours trul'f,

() . () ] /

,M': w (P ~ A,

[ L. F. Dale Nuclear Project Manager 9

JGC'/JRD :ls .Sc7 cc: See ner.t page /

Member Middle South Utilities System 800307 0%8

MISSISStPPI POWEf t & LIGHT COMPANY s

Mr. J. P. O' Reilly AEC:'-80 / 5 2 U. S. Nuclear Regulatory Co:T.ission Pat;c 2 cc: Mr. 5. L. Stamp 1cy bec: Dr. D. C. Gibbs Mr. R. 3. McGehee gr. A. Zaccaria Mr. T. B. Conner . 6 Ar. J. N. Ward 4 ?.\\ @ yy)Mr. D. M. Lake Mr. *iictor Stello, Jr., Cirector Mr. R. L. Scott Division of Inspection & Zaforcement Mr. W. L. Nail U. S. Nuclear Regulatory Cc==ission Mr. J. P. McCaughy Washington, D. C. 20555 Mr. T. E. Reaves Mr. C. K. McCoy Mr. J. W. Yelverton Mr. A. R. Smith File 9

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