ML19317F309
| ML19317F309 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 11/20/1972 |
| From: | Thies A DUKE POWER CO. |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 8001100675 | |
| Download: ML19317F309 (3) | |
Text
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~) h D Mr. Angelo Giambusso A Deputy Director for Reactor Projects 6.' j,g jf ,4 v Directorate of Licensing j g. jy United States Atomic Energy Commission 4,? Washington, D. C. 20545 04 v /(A Attention: Mr. A. Schwencer Re: Oconee Unit 9 and 3 d Dockets 0-9 and 50-287
Dear Mr. Giambusso:
In response to your letter of October 31, 1972 requesting further infor-mation on the auxiliary service water system, attached please find: (1) " Design Basis and Description of Auxiliary Service Water System" (2) Figure titled, " Auxiliary Service Water System" This information should answer your questions 6.4.1 and 6.4.2 and will be incorporated into the Final Safety Analysis Report in the next amend-ment. Please contact us if there are any questions regarding the enclosures. Sincerely, l A. C. Thies ACT:vr Attachments ) 8001100f75 842l3 A7
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- 4 DES IGN BAS IS AND DESCRIPTION
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6.4.1. DESCRIPTION
The auxillary service water system utilizes the plant CCW Intake and ~ discharge conduits as a source of raw cooling water for decay removal. These conduits are interconnected by crossovers and unwatering lines. ~ An auxiliary service water pump located in the auxiliary building at ~ Elev. 771 takes its suction from the Unit 2 intake conduit and discharges into the steam generators of each unit via separate lines into the auxiliary feedwater headers. The raw water is vaporized in the steam generator removing. residual heat and dumped to the atmosp\\ere. The auxiliary service water pump is an end suction centrifugal pump with a rated capacity of.3000 gpm at.a total head of 176 feet. It-has been submitted to-the following tests: 1 A non-witness ASME hydro test 1 2. Witnessed performance test 3. . Sonic testing of' shaft 4 Mill test certificates for casing, impeller, and shaf t l -5. Certified caliper measurements I { The pump power supply is taken f rom the 4160 volt standby Bus No. 1. All valves required for operation of the auxiliary service water system are either-check valves or manually operated. The pump suction is equipped with a normally open butterfly valve and the discharge with a check valve i . and normally open gate valve. The pump bypass is equipped with a globe valve. The' individual lines to each steam generator auxiliary feedwater header are equipped with a check valve and two normally closed gate valves which are used to. con t rol fl ow. . Atmospheric steam dumps on each main steam lead are equipped with two normally closed gate valves which must be opened to reduce steam generator shell side pressure before placing the auxiliary service water system into operation. All non-embedded piping is Class F. 6.4.2 DES IGN BAS IS: The auxiliary service water system is designed for decay heat removal following a concurrent loss of the main feedwater system, auxiliary 4 feedwater system, and decay -heat renoval sys tem. The system will maintain decay heat removal for a minimum of 37 days. 4 l . I .,. - + w y.. --,,r. ---,e c y, , - - =, - + - -y
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