ML15264A566

Forwards Requests for Addl Info Re Responses to Tornado Missiles at Plant.Response Requested within 45 Days of Ltr Date

ML15264A566
Person / Time
Site:	Oconee
Issue date:	11/09/1988
From:	Pastis H Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
References
TAC-48225, TAC-48226, TAC-48227, NUDOCS 8811140419
Download: ML15264A566 (5)

Text

November 9, 1988 Docket Nos. 50-269 50-270 50-287 Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION-TORNADO MISSILES (TACS 48225, 48226, and 48227)

Re:

Oconee Nuclear Station - Units 1, 2, and 3 The staff has reviewed your July 17, 1987, submittal responding to our request for additional information on tornado missiles at Oconee. Additional clarification is needed on three of your responses - 1d, 7 and 8. A request for additional clarification, with the questions numbered as before, i.e., 1d, 7, and 8, is enclosed. One additional question, number 14, has been added.

Please respond to this request for additional information within 45 days of the date of this letter.

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely, Helen N. Pastis, Project Manager Project Directorate 11-3 Division of Reactor Projects I/1I

Enclosure:

As stated cc:

See next page DISTRIBUTION:

Docket File NRC PDR Local PDR o

S. Varga 14-E-4 G. Lainas 14-H-3 D. Matthews 14-H-25 M. Rood 14-H-25 H. Pastis 14-H-25 OGC 15-B-18 E. Jordan MNBB-3302 B. Grimes 9-A-2 ACRS (10)

OCONEE PLANT FILE PDI P-D Pathw HP 1s:1s M o DMatthews 11/

/88 10/J/88 10/C /88

• PJ REG 0 o UNITED STATES NUCLEAR REGULATORY COMMISSION o

WASHINGTON. D. C. 20555 November 9, 1988 Docket Nos. 50-269 50-270 50-287 Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION-TORNADO MISSILES (TACS 48225, 48226, and 48227)

Re:

Oconee Nuclear Station - Units 1, 2, and 3 The staff has reviewed your July 17, 1987, submittal responding to our request for additional information on tornado missiles at Oconee. Additional clarification is needed on three of your responses - 1d, 7 and 8. A request for additional clarification, with the questions numbered as before, i.e., 1d, 7, and 8, is enclosed. One additional question, number 14, has been added.

Please respond to this request for additional information within 45 days of the date of this letter.

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely, Helen N. Pastis, Project Manager Project Directorate 11-3 Division of Reactor Projects I/II

Enclosure:

As stated cc:

See next page

REQUEST FOR ADDITIONAL INFORMATION OCONEE TORNADO MISSILE REVIEW 1d.

Provide a summary-of the results obtained in your reanalysis of tornado missiles when including ricochet and secondary missiles.

7. Provide the fdult trees used to derive the final failure probability for the emergency feedwater (EFW) system. Show how the results were combined to produce the overall failure probability.

8. Discuss the independency of missiles which were calculated to damage both the east and west penetration areas in the event of a receding tornado in the northwest quadrant.

14.

Provide an overall numerical reliability for the combination of the Emergency Feedwater System and Safe shutdown Facility's Auxiliary Service Water System to provide water to the steam generators in the event of a tornado. Indicate how this value was arrived at.

Mr. H. B. Tucker Oconee Nuclear Station Duke Power Company Units Nos. 1, 2 and 3 cc:

Mr. A. V. Carr, Esq.

Mr. Paul Guill Duke Power Company Duke Power Company P. 0. Box 33189 Post Office Box 33189 422 South Church Street 422 South Church Street Charlotte, North Carolina 28242 Charlotte, North Carolina 28242 J. Michael McGarry, III, Esq.

Bishop, Liberman, Cook, Purcell & Reynolds 1200 Seventeenth Street, N.W.

Washington, D.C. 20036 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 525 1700 Rockville Pike Rockville, Maryland 20852 Manager, LIS NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 Senior Resident Inspector U.S. Nuclear Regulatory Commission Route 2, Box 610 Seneca, South Carolina 29678 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W., Suite 2900 Atlanta, Georgia 30323 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 Office of Intergovernmental Relations 116 West Jones Street Rahleigh, North Carolina 27603 Honorable James M. Phinney County Supervisor of Oconee County Walhalla, South Carolina 29621

November 9, 1988 Docket Nos. 50-269 50-270 50-287 Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION-TORNADO MISSILES (TACS 48225, 48226, and 48227)

Re:

Oconee Nuclear Station - Units 1, 2, and 3 The staff has reviewed your July 17, 1987, submittal responding to our request for additional information on tornado missiles at Oconee. Additional clarification is needed on three of your responses - 1d, 7 and 8. A request for additional clarification, with the questions numbered as before, i.e., Id.

7, and 8, is enclosed. One additional question, number 14, has been added.

Please respond to this request for additional information within 45 days of the date of this letter.

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely,

/

Helen N. Pastis, Project Manager Project Directorate 11-3 Division of Reactor Projects I/II

Enclosure:

As stated cc:

See next page DISTRIBUTION:

Docket File NRC PDR Local PDR PDII-3 Reading S. Varga 14-E-4 G. Lainas 14-H-3 D. Matthews 14-H-25 M. Rood 14-H-25 H. Pastis 14-H-25 OGC 15-B-18 E. Jordan MNBB-3302 B. Grimes 9-A-2 ACRS (10)

OCONEE PLANT FILE PD s 1s D3' H

4 s:

Dls HPI* i PD1 V Dflatthews 14 1,-14

-E -4

/88 10/-1 /8814-H-3 8