ML20202E816
| ML20202E816 | |
| Person / Time | |
|---|---|
| Site: | 05200003 |
| Issue date: | 10/24/1997 |
| From: | Joseph Sebrosky NRC (Affiliation Not Assigned) |
| To: | Liparulo N WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| References | |
| NUDOCS 9712080149 | |
| Download: ML20202E816 (4) | |
Text
,
October 24, 1997 Mr. Nicht.; J. Liparulo, Msnager Nuclear Safety and Regulatory Analysis Nuclear and Advanced Technology Division Westinghouse Electrir Corporation P.O. Box 353 Dittsburgh, PA 15230
SUBJECT:
ri)ESTIONS REGARDit'G MISSILE PROTECTION FOR THE AP600
Dear Mr. Liparulo:
[
As a result of ds review of the June 1992 application for design certifica-tion of the AP600, the staff 'has determined that it needs additional informa-tion.
Specificelly, the encicsure to this letter ccntains requests for additional information regarding missile ptr _ ~ '. ion, r
You have requested that port bns of the information submit Md in the r
June 1992, application for coalgn s ertification be exempt from taandatory 3
public disclosure. While the staf t h.wt completed its review of your request in accordance with the requirements of 10 CFR 2.790, that portion of the subinitted informatloa
't being withheld from public eisclosure pending the staff's final determination. The staff concludes that these follow on ques-tions do not contain those portions of the information for which exemptior, is sought.
However, the staff wi ' withhold this letter from public disclosure for 30 calendar days from the u>ts of this letter to allow Westinghouse the opportunity to verify the staff's conclusions.
If, after that time, you do not request that all or portions ci the information in the enclosures be withheld from public disclosure in acccrdance with 10 CFR 2.790, this letter will be placed in the Nuclear Regulatory Commission Public Document Room.
If you have any questions regarding this matter, you may contact me at (301) 415-1132.
Sincerely,
?
original signed by: William C. Huffon Joseph M. Sebrosky, Project Manager Standardization Project Directorate Division of Reactor Program Management Office of Nuclear Reactor Regulation g ' { '.f.t { { @ %
j Docket No.52-003
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Mr. Nicholas J. Liparulo Docket No.52-003 Westinghouse Electric Corporation AP600 cc: Mr. B. A. McIntyre_
Ms. Cindy L. Haag Advanced Plant Safety & Licensing Advanced Plant Safety & Licensing Westinghouse Electric Corporation Westinghouse Electric Corporation Energy Systems Business Unit Energy Systems Business Unit P.O. Box 355 Box 355 Pittsburgh, PA 15230 Pittsburgh, PA 15230 Enclosure to be distributed to the following addressees after the result of the proprietary evaluation is received from Westinghouse:
Mr. Russ Bell Ms. Lynn Conner Senior Project Manager, Programs DOC-Search Associates Nuclear Energy Institute Post Office Box 34 1776 I Street, NW Cabin John, MD 20818 Suite 300 Washington, DC 20006-3706 Mr. Robert H. Buchholz GE Nuclear Energ)
Dr. Craig D. Sawyer, Manager 175 Curtner Avenue, MC-781 Advanced Reactor Programs-San Jose, CA 95125 GE Nuclear Energy 175 Curtner Avenue, MC-754 Mr. Sterling Franks San Jose, CA 95125 U.S. Department of Energy NE-50 Barton 2. Cowan, Esq.
19901 Germantown Road Eckert Seamans Cherin & >
Germantown, MD 20874 600 Grant Street 42nd Floor Pittsburgh, PA 15219 Mr. Charles Thompson, Nuclear Engineer AP600 Certification Mr. Frank A. Ross NE-50 U.S. Department of Energy, HE-42 19901 Germantown Road Office of LWR Safety aad Technology Germantown, MD 20874 19901 Germantown Road Germantown, MD 20874 Mr. Ed Rodwell, Manager PWR Design Certification Electric Power Research Institute 3412 Hillview Avenue Palo Alto, CA 94303
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Request for Additional Information Regarding Missile Protection 410.313 To support the staff's review of SSAR Section 3.5.1.1, regarding internally generated missiles (outside containment), please previde the following information:
(a)
Discuss the possibility of safety relief valves becoming internally generated missile outside containment.
(b)
Provide an assessment of the potential missiles that could be generated outside the containment from piping systems and associated monitoring eculpment, such as temperature probe, flow mcasurement devices, pressure gauges, vessel monitoring devices, etc.
410.314 In SSAR Section 3.5.1.1, provide an asscssment of the potential gravitational missiles generated outside the containment, and a review of nonsafety-related SSC protected from internally generated missiles if thair failure by a missile impact could prevent a required safety function of a safety-related SSC.
4i0.315 In SSAR Section 3.S.I.2, regarding internally generated missiles inside containment, pre"'da information on kinetic energy of poten-tial missiles generat.
.y system components and equipment inside the containment, such as reactor vessel closure head nut and stud, pressurizer safety 'alve flange bolt, RCP temperature nozzle and thermowell, etc.
410.316 In SSAR Section 3.5.1.4, regarding missiles generated by natural pher.omena, the details and references for the tornado-missile analysis were not identified. Discuss the compliance of the analy-sts with Regtlatory Guides (RG) 1.76, l..'17; and list all the postulated missiles as required by Secticn 3.5.1.4 of the SRP.
410.317 In SSAk Section 3.5.2, regarding protection from externally generated missiles, discuss the compliance of SSAR Section 3.5.2 with the guidanca of RG 1.13; RG 1.27 position C.2 and C.3; RG 1.115 position C.1; RG 1.117 positions C.1, C.2, and C.3.
410.318 In SSAR Section 3.5.2, identify structures, systems, and components that shall be protected from externally generated missiles.
Enclosure
i DISTRIBUTION:
Letter to Mr. Nicholas J. Lioarulo. Dated: October 24. 1997
.* Docket F.11e:* Enclosure to be held for 30 days
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