ML20205S202

Forwards Safety Evaluation Supporting Util 860110 Proposal to Remove Four Peak Recording Accelerographs Installed on Reactor Piping Due to Inoperability Caused by Operating Transients & Adequacy of Other Seismic Instrumentation

ML20205S202
Person / Time
Site:	Grand Gulf
Issue date:	05/27/1986
From:	Butler W Office of Nuclear Reactor Regulation
To:	Kingsley O MISSISSIPPI POWER & LIGHT CO.
Shared Package
ML20205S206	List: ML20205S202 ML20205S215
References
TAC-60467, TAC-61931, NUDOCS 8606120081
Download: ML20205S202 (3)

Text

a NAY 2 71986 Docket No. 50-416 DISTRIBUTION (Docket. File r LKintner NRC PDR M0'Brien l LPDR ACRS(10)

Mr. Oliver D. Kingsley, Jr. PD#4 Rdg. Alee Vice President,' Nuclear Operations RBernero Mississippi Power & Light Company Young, OELD

- P.O. Box 23054 EJordan Jackson, Mississippi 39205 BGrimes JPartlow

SUBJECT:

PEAK RECORDING ACCELER0 GRAPHS ON REACTOR PIPING RE: Grand Gulf Unit 1 l By letter dated January 10, 1986, the Mississippi Power & Light Company proposed to remove four peak recording accelerographs installed on reactor piping because they are made inoperable by operating transients and because other seismic instrumentation included in the plant design is adequate for post seismic damage evaluation.

The NRC staff has reviewed the licensee's January 10, 1986 submittal. The staff's safety evaluation is enclosed. The staff concludes that the four peak recording accelerographs which are mounted on the reactor piping do not serve any meaningful purpose for post-seismic damage evaluation and, therefore, can be deleted. The staff also concludes that with the installation of a triaxial strong motion accelerometer as required by License Condition 2.C.(7) and the other installed seismic instruments in the plant, there are sufficient seismic instruments to provide required information for post-seismic damage evaluation.

Sincerely, Original signed by Walter R. Butler, Director BWR Project Directorate No. 4 Division of BWR Licensing

Enclosure:

As stated cc w/ enclosure:

See next page

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k./ * ... MAY 2 7 TA5 Docket No. 50-416 Mr. Oliver D. Kingsley, Jr.

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

SUBJECT:

PEAK RECORDING ACCELER0 GRAPHS ON REACTOR PIPING RE: Grand Gulf Unit 1 By letter dated January 10, 1986, the Mississippi Power & Light Company proposed to remove four peak recording accelerographs installed on reactor piping because they are made inoperable by operating transients and because other seismic instrumentation included in the plant design is adequate for post seismic damage evaluation.

The NRC staff has reviewed the licensee's January 10, 1986 submittal. The staff's safety evaluation is enclosed. The staff concludes that the four peak recording accelerographs which are mounted on the reactor piping do not serve any meaningful purpose for post-seismic damage evaluation and, therefore, can be deleted. The staff also concludes that with the installation of a triaxial strong motion accelerometer as required by License Condition 2.C.(7) and the other installed seismic instruments in the plant, there are sufficient seismic instruments to provide required information for post-seismic damage evaluation.

Sincerely, Walter R. Butler, Director BWR Project Directorate No. 4 Division of BWR Licensing

Enclosure:

As stated cc w/ enclosure:

See next page t

t

l t 1 Mr. Oliver D. Kingsley, Jr.

Mississippi Power & Light Company Grand Gulf Nuclear Staiton cc:

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

Wise, Carter, Child, Steen and Caraway Attorney General P.O. Box 651 Department of Justice Jackson, Mississippi 39205 State of Louisiana Baton Rouge, Louisiana 70804 Nicholas S. Reynolds, Esquire Bishop, Liberman, Cook, Purcell Office of the Governor and Reynolds State of Mississippi 1200 17th Street, N.W. Jackson, Mississippi 39201 Washington, D. C. 20036 Attorney General Mr. Ralph T. Lally Gartin Building Manager of Quality Assurance Jackson, Mississippi 39205 Middle South Services, Inc.

P.O. Box 61000 Mr. Jack McMillan, Director New Orleans, Louisiana 70161 Division of Solid Waste Management Mississippi Department of Natural Mr. Larry F. Dale, Director ,

Resources Nuclear Licensing and Safety Bureau of Pollution Control

~

Mississippi Power & Light Company Post Office Box 10385 P.O. Box 23054 Jackson, Mississippi 39209 Jackson, Mississippi 39205 Alton B. Cobb, M.D.

Mr. R. W. Jackson, Project Engineer State Health Officer Bechtel Power Corporation State Board of Health 15740 Shady Grove Road P.O. Box 1700 Gaithersburg, Maryland 20877-1454 Jackson, Mississippi 39205 Mr. Ross C. Butcher President Senior Resident Inspector Claiborne County Board of Supervisors U.S. Nuclear Regulatory Commission Port Gibson, Mississippi 39150 Route 2, Box 399 Port Gibson, Mississippi 39150 Mr. Ted H. Cloninger Vice President, Nuclear Engineering Regional Administrator, Region II and Support U.S. Nuclear Regulatory Commission, Mississippi Power & Light Company 101 Marietta Street, N.W., Suite 2900 Post Office Box 23054 Atlanta, Georgia 30323 Jackson, Mississippi 39205 Mr. J. E. Cross Grand Gulf Nuclear Station Site Director Mississippi Power & Light Company P.O. Box 756 Port Gibson, Mississippi 39150 Mr. C. R. Hutchinson GGNS General Manager Mississippi Power & Light Company --

4 Post Office Box 756 Port Gibson, Mississippi 39150