ML20151M516

Forwards SER Re Control Sys Single Failure Study,Per 860702, 0428 & s.Based on Review,Util Demonstrated No Failures of Control Sys Power Sources or Sensors Which Would Result in Consequences Outside Chapter 15 Bounds

ML20151M516
Person / Time
Site:	Waterford
Issue date:	07/21/1988
From:	Wigginton D Office of Nuclear Reactor Regulation
To:	Dewease J LOUISIANA POWER & LIGHT CO.
Shared Package
ML20151M519	List: ML20151M516 ML20151M528
References
NUDOCS 8808050210
Download: ML20151M516 (4)

Text

1 July 21, 1988 Docket No. 50-382 Mr. J. G. Dewease Senior Vice President - Nuclear Operations  ;

Louisiana Power and Light Company j 317 Baronne Street, Mail Unit 17 New Orleans, Lousiana 70160

SUBJECT:

CONTROL SYSTEM SINGLE FAILURE STUDY In our Safety Evaluation Peports (NUREG-0787) Supplements 1 and 8, we requested that Louisiana Power and Light Company conduct a review to identify any power sources or sensors which provide power or signals to two or more control systems. We also requested that you demonstrate that failures or malfunctions of the power sources or sensors will not result in consequences outside the bounds of the Chapter 15 analysis.

We have reviewed your submittals dated July 2, 1986, April 28 and July 8, 1987. Based on our review, we find that LP&L has demonstrated there are no single failures of control systems power sources or sensors which would result in consequences outside the bounds of the Chapter 15 analysis. We, therefore, consider this issue complete. The staff's Safety Evaluation is enclosed.

Sincerely, Isl David L. Wigginton, Project Manager Project Directorate - IV Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

As stated cc w/ enclosure:

See next page DISTRIBUTION Docket File- ;;NRC PDR Local PDR PD4 Reading L. Rubenstein J. Calvo P. Noonan D. Wigginton 0GC-Rockville E. Jordan B. Grimes ACRS (10)

PD4 Plant File PDIV:D yy%

PDIV:LhD4 PDI PNoonad 07/W/88 DWigginton:kb JCalvo 07 /88 07/2//88 /M l l 8808050210 080721 PDR ADOCK 05000302 P PNU

e July 21, 1988 1 .

J Docket No. 50-382 Mr. J. G. Dewease Senior Vice President - Nuclear Operations Louisiana Power and Light Company 317 Baronne Street, Mail Unit 17 New Orleans, Lousiana 70160

SUBJECT:

CONTROL SYSTEM SINGLE FAILURE STUDY In our Safety Evaluation Reports (NUREG-0787) Supplements 1 and 8, we requested that Louisiana Power and Light Company conduct a review to identify any power sources or sensors which provide power or signals to two or more control systers. We also requested that you demonstrate that failures or malfunctions of the power sources or sensors will not result in consequences outside the bounds of the Chapter 15 analysis.

We have reviewed your submittals dated July 2, 1986, April 28 and July 8, 1987. Based on our review, we find that LP&L has demonstrated there are no single failures of control systems power sources or sensors which would, result in consequences outside the bounds of the Chapter 15 analysis. We, therefore, consider this issue complete. The staff's Safety Evaluation is enclosed.

Sincerely, 15l David L. Wigginton, Project Manacjer Project Directorate - IV Division of Reactor Projects - III, IV, Y and Special Projects .

Office of Nuclear Reactor Regulation

Enclosure:

As stated cc w/ enclosure:

See next page DISTRIBUTION Docket File NRC PDR Local PDR PD4 Reading L. Rubenstein J. Calvo P. Noonan D. Wigginton OGC-Rockville E. Jordan B. Grimes ACRS (10)

PD4 Plant File PDIV:LAn PDI : PDIV:D PNoonad DWigginton:kb JCalvo [

07/W/88 07p/88 07/2//88

g4 Klag i ~g UNITED STATES 8 o NUCLEAR REGULATORY COMMISSION 7- e E WASHINGTON, D. C. 20655

%, . . . . . p July 21,198P Docket No. 50-382 Mr. J. G. Dewease Senior Vice President - Nuclear Operations Louisiana Power and Light Company 317 Baronne Street, Mail Unit 17 New Orleans, Lousiana 70160

SUBJECT:

CONTROL SYSTEM SINGLE FAILURE STUDY InourSafetyEvaluationReports(NUREG-0787) Supplement-1and8,we requested that Louisiana Power and Light Corrpany conduct a review to identify any power sources or sensors which provide power or signals to two or more control systems. We also requested that you demonstrate that failures or malfunctions of the power sources or sensors will not result in consequences outside the bounds of the Chapter 15 analysis.

We have reviewed your submittals dated July 2,1986, April 28 and July 8, 1987. Based on our review, we find that LP8L has demonstrated there are no single failures of control systems power sources or sensors which would result in consequences outside the bounds of the Chapter 15 analysis. We, therefore, consider this issue complete. The staff's Safety Evaluation is enclosed.

Sincerely, s .

David L. W g ton, Project Manager Project Directorate - IV Division of Reactor Projects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

As stated cc w/ enclosure:

See next page

Mr. Jerrold G. Dewease Waterford 3 Louisiana Power & Light Company cc:

W. Malcolm Stevenson, Esq. Regional Administrator, Region IV Monroe & Leman U.S. Nuclear Regulatory Commission 1432 Whitney Building Office of Executive Director for New Orleans, Louisiana 70103 Operations 611 Ryan Plaza Drive, Suite 1000 Mr. E. Blake Arlington, Texas 76011 Shaw, Pittman, Potts & Trowbridge .

2300 N Street, NW Mr. William H. Spell, Administrator Washington, D.C. 20037 Nuclear Energy Division Office of Environmental Affairs Resident Inspector /Waterford NPS Post Office Box 14690 Post Office Box 822 Baton Rouge, Louisiana 70898 Killona, Louisiana 70066 Mr. Ralph T. Lally President, Police Jury Manager of Ouality Assurance St. Charles Parish Middle South Services, Inc. Hahnville, Louisiana 70057 Post Office Box 61000 New Orleans, Louisiana 70161 Chairman William A. Cross Louisiana Public Service Commission Bethesda Licensing Office One American Place, Suite 1630 3 Metro Center Baton Rouge, Louisiana 70825-1697 Suite 610 Bethesda, Maryland 20814 Mr. R. F. Burski, Acting Nuclear Safety and Regulatory Affairs Manager Louisiana Power & Light Company 317 Baronne Street New Orleans, Louisiana 70112

_ . _ .