ML15264A438

Forwards Request for Addl Info Re Fire Loads,Fire Protection Features & Piping Penetrations,For 861111 Request for Exemptions from Technical Requirements of 10CFR50,App R, Sections Iii.G & Iii.J

ML15264A438
Person / Time
Site:	Oconee
Issue date:	11/14/1986
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
References
NUDOCS 8611210347
Download: ML15264A438 (3)

Text

Dockets Nos. 50-269, 50-270 November 14, 1986 and 50-287 Mr. Hal B. Tucker Vice President - Nuclear Production Duke Power Company P. 0. Box 33189 422 South Church Street Charlotte, North Carolina 28242

SUBJECT:

EXEMPTION REQUESTS FROM APPENDIX R TO 10 CFR 50 REQUEST FOR ADDITIONAL INFORMATION Re:

Oconee Nuclear Station, Units 1, 2 and 3 By letter dated November 11, 1983, as supplemented by letters dated October 24, 1983, August 14, 1984 and February 28, 1985, you requested exemptions from the technical requirements of Sections III.G. and III.J. of Appendix R to 10 CFR 50.

To complete our review, we need the additional information identified in the enclosure. We request that you respond to this request for additional information within thirty days of receipt 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,

/S/

John F. Stolz, Director PWR Project Directorate #6 Division of PWR Licensing-B

Enclosure:

Request for Additional Information cc w/enclosure:

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

Mr. William L. Porter Mr. Paul F. 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 & Peynolds 1200 Seventeenth Street, N.W.

Washington, D.C.

2-0036 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 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 U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W.

Suite 3100 Atlanta, Georgia 30303 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 Raleigh, North Carolina 27603 Honorable James M. Phinney County Supervisor of Oconee County Walhalla, South Carolina 29621

REQUEST FOR ADDITIONAL INFORMATION OCONEE NUCLEAR STATION, UNITS 1, 2 AND 3 APPENDIX R TO 10 CFR 50 EXEMPTION REOUESTS

1. Provide the fire loads, in terms of Btu per square foot, for the penetration rooms near the cork-filled seismic joints. Also, identify the safe shutdown cables and equipment located in these areas/ooms.

Describe the fire loads and fire hazards on the exposed sides of the cork in areas immediately adjacent to the penetration rooms.

2. Clarify whether the exemption request for the reactor building is for only one specific instance of cable interaction or for several locations within the buildings. Describe the fire protection features installed.

Also, give a physical description of the area(s) and the fire loading(s).

Quantify the fire load in terms of Btu per square foot. Describe the location and/or presence of normal safe shutdown cables and equipment and whether or not the dedicated safe shutdown system is independent of the reactor buildings and the area/zone(s) of concern.

3.Section III.G.2.d of Appendix R pertains specifically to containments and not to auxiliary buildings. Therefore, restate exemption request number 1 of the August 14, 1986 submittal in terms of an appropriate part of Section III.G.2. This exemption request also requires the following support information:

a. Provide the actual separation distance between the standby shutdown system cables and the eight safety-related cables identified in the exemption request.

b. Quantify the fire load in terms of Btu per square foot and identify any specific fire hazards, e.g., oil, present.

c. Describe the area and its fire protection features.

d. Clarify the cable separation issue(s), i.e., is this a case of alternative safe shutdown cables not being physically independent of a fire area or a case of lack of separation between redundant divisions of normal shutdown divisions?

4. With regard to the pipinq penetrations in the floors and ceilings of the east and west penetration rooms, a description, sketch, or drawing of a typical piping penetration is required. Also, indicate approximate dimensions, wall thickness of pipe, and depth of "Rubatex".

Identify and describe any fire hazards or concentrated fire loads within 20 feet of the piping penetrations.