ML20217J822
| ML20217J822 | |
| Person / Time | |
|---|---|
| Site: | 05200003 |
| Issue date: | 10/16/1997 |
| From: | Huffman W NRC (Affiliation Not Assigned) |
| To: | Liparulo N WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| References | |
| NUDOCS 9710220113 | |
| Download: ML20217J822 (3) | |
Text
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October 16, 1997 Mr. Nicholas J. Liparuio, Manager Nuclear Safety and-Regulatory Analysis Nuclear and Advanced Technology Division Westinghouse Electric Corporation P.O. Box 355 Pittsburgh, PA 15230
SUBJECT:
OPEN ITEM ASSOCIATED WITH AP600 SAFETY EVALUATION REPORT ON EXTERNAL PRESSURE ANALYSIS l
Dear Mr. Liparulo:
The Contcinment Systems and Severe Accident Branch (SCSB) of the Nuclear Regulatory Commission (NRC) has provided an SER input to the S'andardization Project Directorate for SER Section 6.2.1.1.4 on External Pressure Analysis.
The input has an open item which has been extracted and designated as an FSER open item in an enclosure to this letter.
l If you haee any questions regarding this matter, you may contact me at
-(301) 41S-1141.
Sincerely, original signed by:
William C. Huffman, Project Manager Standardization Project Directorate Division of Reactor Program Management Office of Nuclear Reactor Regulation Docket No.52-003
Enclosure:
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Mr. Nicholas J. Liparulo-Docket No.52-003 Westinghouse Electric Corporation AP600 cc: Mr. B. A. McIntyre Mr. Russ Bell Advanced Plant Safety & Licensing Senior Project Manager, Programs Westinghouse Electric Corporation Nuclear Energy Institute Energy Systems Business Unit 1776 I Street, NW P.O. Box 355 Suite 300 Pittsburgh, PA 15230 Washington, DC 20006-3706 Mr. Cindy L. Haag Ms. Lynn Connor Advanced Plant Safety & Licensing Doc-Search Associates Westinghouse Electric Corporation Post Office Box 34 Energy Systems Business Unit cabin John, MD 20818 Box 355 Pittsburgh, PA 15230 Dr. Craig D. Sawyer, Manager Advanced Reactor Programs i
Mr. Sterling Franks GE Nuclear Energy U.S. Department of Energy 175 Curtner Avenue, MC-754 NE-50 San Jose, CA 95125 19901 Germantown Road Germantown, MD 20874 Mr. Robert H. Buchholz GE Nuclear Energy Mr. Frank A. Ross 175 Curtner Avenue, MC-781 l
U.S. Department of Energy, NE-42 San Jose, CA 95125 Office of LWR Safety and Technology 19901 Germantown Road Barton Z. Cowan, Esq.
Germantown, MD 20874 Eckert Seamans Cherin & Mellott 600 Grant Street 42nd Floor Mr. Charles Thompson, Nuclear Engineer Pittsburgh, PA 15219 AP600 Certification NE-50 Mr. Ed Rodwell, Manager 19901 Germantown Road PWR Design Certification Germantown, MD 20874 Electric Power Research Institute 13412 Hillview Avenue Palo Alto, CA 94303
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SER OPEN ITEM ASSOCIATED WITH AP600 FSER SECTION 6.2.1.1.4 480.1081F In order to maximize the external differential pressure across the
-containment shell, Westinghouse states that the worst case AP600 l
scenario is a loss of all AC power with an external temperature of
-40'F and a wind speed of 48 mph.- Because of the recent addition of a containment spray system to the AP600 design, the staff is uncertain if the Westinghouse bounding scenario is still valid.
Westinghouse needs to address if inadvertent actuation of the containment spray system has been considered for the external pressure analysis.
4 Enclosure
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