ML20150C206

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Forwards Copies of PSAR Figure 14.16a Showing Containment Elevator Pit Framing.Drawing Represents Current Design.Also Encl Is PSAR p.9.2-11 Showing Current Psok Position Re UHS Cooling Tower Design.Cert of Svc Encl
ML20150C206
Person / Time
Site: Black Fox
Issue date: 11/10/1978
From: Ewing T
PUBLIC SERVICE CO. OF OKLAHOMA
To: Varga S
Office of Nuclear Reactor Regulation
References
6212DIN8-013391, 6212DIN8-13391, NUDOCS 7811140214
Download: ML20150C206 (4)
v • d • e


Text

{{#Wiki_filter:' } 6212 DIN 8-013-391 PUBLIC SERVICE COMPANY OF OKLAHOMA A CENTRAL AND SOUTH WEST COMPANY P O BOX 201/ TULSA. OKLAHOMA 74102 / t912) 583-3611 Public Service Company of Oklahoma November 10, 1978 Black Fox Station Units 1 and 2 File: 6212.125.3500.32 L Miscellaneous Clarifications: Containment Elevator Ultimate Heat Sink Cooling Towers Docket STN 50-556 STN 50-557 , Office of Nuclear Reactor Regulation Division of Project Management Light Water Reactors Branch No. 4 U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Steven A. Varga, Chief Gentlemen: Enclosed are 40 copies of PSAR Figure 14.16a showing the containment elevator pit framing. This . drawing represents the current BFS design in this area and supercedes PSAR Figure 14.16a dated 12-100678 found on page 3C.14-17a. In addition, enclosed are 40 copies of PSAR page 9.2-11 representing the current PS0 position regarding the UHS Cooling Tower design. This material has been discussed with your Dr. Cecil Thomas and is provided to , clarify these areas of the docket. l These revised pages 3C.14-17a and 9.2-11 will be incorporated in PSAR Amendment 13 which will be submitted prior to construction permit issuance. Very truly yours, l T. N. Ewing, M r l Black Fox Stati n Nuclear Project TNE:VLC:fd 

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BLACK FOX STATION SERVICE LIST XC: Mr. Cecil Thomas . U.S. Nuclear Regulatory Commission Phillips Building 7920 Norfolk Avenue Bethesda, Maryland 20014 Mr. Jan A. Norris Environmental Projects Branch 3 U.S. Nuclear Regulatory Commission Phillips Building 7920 Norfolk Avenue Bethesda, Maryland 20014 Mr. William G. Hubacek U.S. Nucicar- Regulatory Commission Office of Inspection and Enforcement Region IV 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012 Mr. Gerald F. Diddle General Manager Associated Electric Cooperative, Inc. P. O. Box 754 Springficid, Missouri 65801 4 Mr. Maynard Human General Manager Western Farmers Electric Cooperative P. O. Box 429 Anadarko, Oklahoma 73005 Michael I. Miller, Esq. Isham, Lincoln & Beale One 1st National Plaza , Suite 4200 Chicago, Illinois 60603 j Mr. Joseph Gallo Isham, Lincoln & Beale 1050 17th Street N.W. Washington, D.C. 20036 Joseph R. Farris, Esquire John R. Woodard, III, Esquire Green, Feldman, Hall & Woodard l 816 Enterprise Building Tulsa, Oklahoma 74103 

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9.2.5.3 Safety Evaluation. The Ultimate Heat Sink is capable of providing j sufficient cooling for more than 30 days: l (1) To permit simultaneous safe shutdown of both nuclear reactor units j and to maintain them in a safe shutdown condition and (2) In the event of an accident in one unit, to permit safe control of the accident and also permit simultaneous safe shutdown of the other unit and to maintain it in a safe shutdown condition. The UHS, consisting of cooling towers, fans, basin, pump house, and makeup basin will be designed to withstand, without a loss of functional capability to meet the requirements of items (1) and (2) above, the following natural phenomena; safe shutdown earthquake, probable maximum flood, and tornado wind forces and tornado borne missiles. The UHS cooling towers, basin, (*M the pump house will be constructed of concrete walls and roofs. The Ultimate Heat Sink is capable of withstanding the effects of other applicable site-related events, reasonably probable combinations of less severe phenomena, and any single creditable failure of any active component without loss of the sink capability to provide the heat rejection necessary to meet requirements of items 1 and 2 above. A single nonmechanistic failure of a man-made structural feature of the UHS is considered to be incredible since the UHS is designed to Seismic Category I requirements. Refer to Tables 9.2 2 and 9.2-3 for a failure analysis of the Standby Service Water System and the UHS. The Ultimate Heat Sink in conjunction with the SSWS is designed to withstand, without loss of safety function, the disabling of any one cooling tower fan simultaneous with a single active failure in any one Unit 1 or Unit 2 division during a loss of preferred power. The Unit 1 Division 1 

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and Division 2 SSWS return lines to the UHS cooling towers will be cross-tied to the respective Unit 2 SSWS return lines. l l l 9.2-11

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                                                                           - CONTAINMENT f                LL 592' 7"                                       .                                                   NOTES
                                                 /                9                     L , STRUCTURAL TfEEL TRAMING AT EL 589'*8' SMALL Bf
                ~EL 989'- 899"                   I          i        I                      LIMITED TO SECTIONS FOR WHECH THE WIOTH DOES I                                                                                            NOT EXCEED 20'.

[ SUPPPCS$10N POOL NWL EL 570'-8".

3. STRUCTURAL STEEL AT OR ABOVE El 589 8' WILL BC PLAM DESIGNED IN ACCORDANCE WITH SECTION 12 0 Of i

Bf5 PSAR APPENDD 3C. SPECIFICALLY FICURE 12 2 l SECTICN 2 TO PREVENT THE ELEVATOR OR ANY PARTS THERE0r TRoM FALLING INTO THE SUPPRESSION POOL. I i l l i l I l 6' C r 0 5' 10' l i 3/16" = l'-0" y j l PUBilC SERVICE COMPANY OF OKLAHOMA 8t ACE f oX ST Af;0N - Unit 1 REACTOA BUILDING-PLATFORM FRAMING I4-16a ELEVATOR PIT FRAMING REACTOR BUILDING-PLATFORM FRAMING ELEVATOR PIT FRAMING 3C.14-17a FIGURE Ill.16a}}

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