ML20210Q432
| ML20210Q432 | |
| Person / Time | |
|---|---|
| Site: | 05200003 |
| Issue date: | 08/25/1997 |
| From: | Quay T NRC (Affiliation Not Assigned) |
| To: | Liparulo N WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| References | |
| NUDOCS 9708290192 | |
| Download: ML20210Q432 (3) | |
Text
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UNITED STATES -
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NUCLEAR RE20LATORY COMM18813N c-i WASHINGTON, o.C. asseHe01 l
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August 25, 1997
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Mr. NicholasL J. Liparulo, Manager Nuclear. Safety and Regulatory Analyds Nuclear and Advanced Technology Division Westinghouse-Electric Corporation-P.O. Box 355' Pittsburgh, PA. 15230
SUBJECT:
OPEN ITEM ASSOCIATED WITH-THE AP600 CLASSIFICATION OF CHEMICAL AND VOLUMELCONTROL SYSTEM-(CVS) REACTOR COOLANT PRESSURE BOUNDARY (RCPB)
PIPING l
Dear Mr. Liparulo:
'The majority of the AP600 CVS piping within containment (including the.
-demineralizers, letdown and regenerative heat exchangers,. reactor coolant i
filters, and hydrogen injection line) form part of the RCPB as defined in 10 CFR 50.2.
10 CHR 50.55a states that RCPB components must meet the require-ments of Class 1,Section III of the American Society of Mechanical Engineers-(ASME) Boiler and Pressure Vessel Code unless the components can be isolated from the RCPB by two valves in series which are automatically closed upon a
' postulated failure of the downstream piping while maintaining the capability of shutting and cooling the reactor down in an orderly manner, assuming _ makeup l1 1s provided by the reactor coolant makeup system only. -Westinghouse has classified the AP600 CVS RCPB piping between the. letdown, charging, and spray line automatic isolation v-
's and the containment isolation valves as
[
Class.D, non-ASME Section.!, non-Appendix B piping, s
L The Nuclear Regulatory Commission staff has determined that the classification of any RCPB piping as non-ASME Section III, Class-1 or 2, non-Appendix B
. piping does not conform with the Regulatory Guide (RG) 1.26 on classification standards for nuclear power plants. Westinghouse has not included any i
discussion n the AP600 standard safety analysis report on this notable exception to standard RCPB piping classification nor identified this as a 4
deviation from RG 1.26.
In a telephone call 4 with Westinghouse on July 9 -1997, the staff conveyed this concern to Westinghouse and requested written justification for the classifi-cation of the CVS RCPB piping.
The staff. noted in the telecon.that Westing-
. house will need to explain how the CVS classification complies with 10 CFR U
- 50.55a for RCPB classification, including which valves are credited for -
automatic-isolation of the CVS and-how thoseLyalves are qualified, tested, and c
i subjected to periodic surveillances which ensure the safety function and the
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3 leak tightness ofL these valves and other pressure isolation valves is main-Q1YU' tained throughout the plant life.
In addition, Westinghouse will need to 4
justify why ~RG 1.26 was not followed to make the CVS piping ASME Section III,_
i Class 2, or-(under some limited circumstances) Class-3.L g
s NRC FILE CENTER COPY 9708290192 970825 PDR ADOCK 05200003 ll ll ll ll Ill.ll.l l.l 4
4 eaa
l Mr. Nicholas J. Liparulo 2-August 25, 1997 Westinghouse has not yet provided any additional information on this co.'cern.
The staff cannot complete its safety evaluation of the classification of structures, components, and systems (SER Section 3.2) until this issue is resolved. Westinghouse is requested to provide an open item tracking system action item to capture this issue with the status listed as action Westing-house.
If you have any questions regarding this matter, you can contact Bill Huffman at (301) 415-1141.
Sincerely, original signed by:
Theodore R. Quay, Director Standardization Project Directorate Division of Reactor Program Management Office of Nuclear Reactor Regulation Docket No.52-003 cc:
See next page DISTRIBUTION:
- Docket-File +
PDST R/F JRoe PUBLIC DMatthews TQuay TKenyon BHuffman JSebroksy JMoorc, 0-15 B18 WDean, 0-5 E23 ACRS (11)
Glainas, 0-7 D26 GBagchi, 0-7 H15 JBrammer, 0-7 H15 LSpessard, 0-9 E4 JHuang, 0-7 H17 DTerao, 0-7 E23 SBlack, 0-9 Al BGramm, 0-9 Al JPeralta, 0-9 Al GHolahan, 0-8 E2 SNewberry, 0-8 E2 TCollins, 0-8 E23 Alevin, 0-8 E23, GHsii, 0-8 E23 DOCUMENT NAME: A:CVCS.ISU
- See previous concurrence To receive a copy of tido document, Indicate in the boa:
"C" o Copy without attachment / enclosure "E* = Copy with attachment 1 enclosure "N" = No copy 0FFICE PM:PDST:DRPM BC:ECGB:DE (A)D:DE 0:PDST:DPRM NAME WCHuffman M w _ *GBagchi
- Glainas TRQuay'T724 DATE 08/ 3 /97 V
08/20/97 08/22/97 08/xs/97 OFFICL 6L RECORD COPY
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 Hs, 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 Mr. S. M. Modro GE Nuclear Energy Nuclear Systems Analysis Technologies 175 Curtner Avenue, MC-754 Lockheed Idaho Technologies Company San Jose, CA 95125 Post Office Box 1625 Idaho Falls, ID 83415 Mr. Robert H. Buchholz GE Nuclear Energy Mr. Sterling Franks 175 Curtner Avenue, MC-781 U.S. Department of Energy San Jose, CA 95125 NE-50 19901 Germantown Road Barton Z. Cowan, Esq.
Germantown, MD 20874 Eckert Seamans Cherin & Mellott 600 Grant Street 42nd Floor Mr. Frank A. Ross Pittsburgh, PA 15219 U.S. Department of Energy, NE-42 Office of LWR Safety and Technology Mr. Ed Rodwell, Manager I
19901 Germantown Road PWR Design Certification Germantown, MD 20874 Electric Power Research Institute 3412 Hillview Avenue Mr. Charles Thompson, Nuclear Engineer Palo Alto, CA 94303 AP600 Certification NE-50 19901 Germantown Road Germantown, MD 20874
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