ML20155D361

Advises That 850128 Submittal Re Impact of Revised Seismic Analysis on Standby Svc Water Cooling Tower Basin Does Not Significantly Affect Equipment Qualification Because Sufficient Margins Exist to Accommodate Revised Loadings

ML20155D361
Person / Time
Site:	Grand Gulf
Issue date:	04/02/1986
From:	Butler W Office of Nuclear Reactor Regulation
To:	Kingsley O MISSISSIPPI POWER & LIGHT CO.
References
TAC-60119, NUDOCS 8604170307
Download: ML20155D361 (3)

Text

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APR 2 1986 DISTRIBUTION Docket F11e3 LKintner Docket Nos. 50-416/417 NRC PDR P0Brien Local PDR ACRS (10)

PD#4 Reading Mr. Oliver D. Kingsley, Jr. RBernero Vice President, Nuclear Operations Young, OELD Mississippi Power & Light Company EJordan P.O. Box 23054 BGrimes Jackson, Mississippi 39205 JPartlow

SUBJECT:

GRAND GULF NUCLEAR STATION (GGNS) UNITS 1 AND 2, SEISMIC QUALIFICATION OF EQUIPMENT IN THE STANDBY SERVICE WATER COOLING TOWER BASIN (SSWCTB)

By letter dated January 28, 1985, the Mississippi Power & Light Company provided information on the impact of a revised seismic analysis of the SSWCTB on the seismic qualification of equipment in the SSWCTB. The NRC staff has previously reviewed and accepted the revised seismic analysis and resulting floor response spectra curves by letter dated June 13, 1985.

The NRC staff has completed its review of the licensee's January 28, 1985, sub-

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mittal concerning the impact of the revised seismic analysis on SSWCTB equipment qualification. The staff concludes that seismic qualification is not significantly affected because sufficient margins exist in the original seismic qualification to accommodate the revised seismic loadings.

Sincerely, Orisiant sissed to Walter R. Butler, Director BWR Project Directorate No. 4 Division of BWR Licensing cc: See next page PD#4/PM PD#4/D LKintner:lb WButler y /J//86 ///86 SM"l8EEESUkii'm P

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• , UNITED STATES

!)3..g(i NUCLEAR REGULATORY COMMISSION E

,g} 7 /4 WASHINGTON D. C. 20555 N .',';' . /

. APR 3 1938 Docket Nos. 50-416/417 Mr. Oliver D. Kingsley, Jr.

Vice President, Nuclear Operations Mississippi Power & Light Company P.O. Sox 23054 Jackson, Mississippi 39205

SUBJECT:

GRAND GULF NUCLEAR STATION (GGNS) UNITS l'AND 2. SEISMIC QUALIFICATION OF EQUIPMENT IN THE STANDBY SERVICE WATER COOLING TOWER BASIN (SSWCTB)

By letter dated January 28, 1985, the Mississippi Power & Light Company provided infomation on the impact of a revised seismic analysis of the SSWCTB on the seismic qualification of equipment in the SSWCTB. The NRC staff has previously -

reviewed and accepted the revised seismic analysis and resulting floor response spectra curves by letter dated June 13, 1985.

The NRC staff has completed its review of the licensee's January 28, 1985, sub-mittal concerning the impact of the revised seismic analysis on SSWCTB equipment qualification. The staff concludes that seismic qualification is not significantly affected because sufficient margins exist in the original seismic qualification to accommodate the revised seismic loadings.

Sincerely,

/sceAZat Walter R. Butler, Director BWR Project Directorate No. 4 Division of BWR Licensing cc: See next page

wl .- ,.

Mr. Oliver D. Kingsley, Jr. .

Mississippi Power & Light Cornpany Grand Gulf huclear Staiton CC:

Rcbert B. McGehee, Esquire The Honorable William J. Guste, Jr.

- hise, C&rter, Child, Steen and Caraway Attorney General P.G. Box 651 Department of Justice Jackson, Mississippi 39205 State of Louisiana Baton Rcuse, Louisiana 70804 hicholcs S. Reynolds, Esquire Bishop, Liberman, Cook, Purcell and Reynolds

' 1200 17th Street, ii.W.

Washington, D. C. 20036 Mr. Ralph T. Lally Manager of Quality Assurance Office of the Governor Middle Scuth Services, Inc. State of Mississippi P.O. Box 61000 Jackson, Mississippi 39201 hew Orleans, Louisiana 70161 Attorney General Mr. Larry F. Dale, Director Gartin. Building .

f:uclear Licensing and Safety Jackson. Mississippi 39205 Mississippi Fcwer & Light Company P.O. Box 23054 Mr. Jack McMillan, Director

. Jackson, Mississippi 39205 ,

Solid Maste Mississippi State Board of Health

. Mr. R. W. Jackson, Project Engineer 880 Lakeland 4

! Bechtel Power Corporation Jackson, Mississippi 39206 1  ? 15740 Shady Grove Road Gaithersburg, Marylund 2E077-1454 Alton B'. Cobb, M.D.

State Health Officer Mr. Ross C. Butcher State Board of Health Senior Resident Inspector 7.0. Box 1700 U.S. Nuclear Regulatory Cornission Jackson, Mississippi 39205

>  ! Route 2, Box 399 Fort Gibson, Mississippi 39150 President Claiborne County. Board of Supervisors Regional Acministrator, Region II .

Port Gibson, Mississippi 39150 g

i U.S. Nuclear Regulatory Connission,

]d 101 Marietta Street, N.W., Suite 2900 Mr. Ted H. Cloninger Atlanta, Georgia 30323 Vice President, huclear Engineering and Support

'. Mr. J. E. Cross flississippi Power & Light Corrpary

Grand Gulf Nuclear Station Site Director Post Office Box 23054

': Jackson, Mississippi 39205

l. Mississippi Power & Light Company I P.O. Box 756 Port Gibson, Mississippi 39150 Mr. C. R. Hutchinson GGNS Ceneral hanager .

Mississippi Pcwer & Litjht Company Post Office Box 756 "

Port Gibson, Mississippi 39150