ML20199H867

Forwards Comments on AP600 Design Control Document,Submitted by Westinghouse

ML20199H867
Person / Time
Site:	05200003
Issue date:	01/20/1999
From:	Joshua Wilson NRC (Affiliation Not Assigned)
To:	Mcintyre B WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
References
NUDOCS 9901250358
Download: ML20199H867 (5)

Text

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January 20, 1999 Mr. Brian A. McIntyre, Manager

. Advanced Plant Safety and Licensing Energy Systems Business Unit Westinghouse Electric Company P.O. Box 355 Pittsburgh, PA 15230-0355

SUBJECT:

REVIEW OF DESIGN CONTROL DOCUMENT

Dear Mr. McIntyre:

By your letter of November 30,1998 (DCP/NRC 1448), Westinghouse submitted the AP600 Design Control Document (DCD). The U. S. Nuclear Regulatory Commission (NRC) staff has determined that certain information in the DCD needs to be revised before the NRC staff can find the DCD acceptable for referencing in the proposed design certification rule for the AP600 standard plant design. The NRC staff's questions and comments on the DCD are provided in Enclosure 1 to this letter. In addition, I provided some editorial and typographical comments by ,

my facsimile, dated December 30,1998.

If you have any questions on this matter, you may contact me at 301-415-3145. I will notify you when the NRC staff has completed its review of the AP600 DCD.

Sincerely,-

original signed by: l I

Jerry N. Wilson, Gsnier Policy Analyst License Renewal Project Directorate i Division of P.eactor Program Management i Office of Nuclear Reactor Regulation Docket N2 52-003 l l i

Enclosure:

As stated cc w/ encl: See next page

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              ' CMiller,0-12 H2

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( OFFICE: BC:PDLR:DRPM SP:PDLR:DRPM, NAME: CIGrimes ~ [h- JN DATE: 01/ Td99 < 01//f/99' / OFFICIAL RECORD COPY 9901250358 990120 PDR ADOCK 05200003 _A PDR ,

i i Mr. Brian A. McIntyre Docket No. 52-003 Westinghouse Electric Corporation AP600 cc: Mr. H.' A. Sepp . Advanced Plant Safety & Licensing . Westinghouse Electric Corporation Energy Systems Business Unit P.O. Box 355

                              - Pittsburgh,' PA 15230.

Ms.- Susan Fanto

                             ' Advanced' Plant Safety & Licensing Westinghouse Electric Corporation Energy Systems Business Unit P.O. Box 355 '

Pittsburgh, PA 15230 Ms. Lynn Connor

                              . DOC-Search Associates Post Office Box 34 7                        Cabin John, MD 20818 Barton Z. Cowan, Esq.

Eckert Seamans Cherin & Mellott 600 Grant Street 42nd Floor -

                             - Pittsburgh, PA.15219 Mr. Charles Thompson, Program Manager AP600 Certification -

NE-50 > 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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i Comments on the AP600 DCD , 1. Westinghouse should clearly identify the conceptual design information that is located in l various places throughout the DCD, in order to avoid confusion regarding which portions of the Tier 2 information are outside the scope of the AP600 str,dard p', ant design. See the System 80+ DCD for an acceptable example of designatin,t conceptualinformation.

2. ' Westinghouse should revise Table 1.8-2 (Sheet 6 of 6) to correctly identify the location of the PRA COL information items.

3. Westinghouse should correct its statements regarding the post-accident radiation sources that were used in the AP600 safety analyses. The statements on pages 1.9-13, 1.9-24,1.9-78,1.9-106,1 A-1, and 1 A-2 are inconsistent.

4. Westinghouse should revise DCD Section 12.4.1.8 to be consistent with SSAR Section 12.4.1.8, Rev. 23. In addition, Westinghouse should verify that all SSAR l changes made in Revisions 23,24, and 25 have been correctly incorporated into the DCD.

5. Westinghouse should revise the first sentence of Section 3.7.2.8.1, regarding Seismic Category ll structures, to be consistent with the third sentence of the third paragraph of Section 3.7.2.

6. The first sentence of the seccnd paragraph of Section 3.8.4.3.2.3 should read, "For the design of structural members, such as the floors and beams, seismic loads include.... "

L 7. Tables 3.8.4-7 (Sheets 1 through 6) and 3.8.5-3 should be designated as Tier 2* l information, consistent with Table 3.8.3-3. These Tables should be added to thv index in Table 1-1 of the DCD Introduction with the expiration at "First Full Power." l

8. Westinghouse should change the footnote, " *The in-plane loads . . ." on Table 3H5-2 (Sheets 1 and 2), to a " Note" to avoid confusion with the Tier 2' footnote mark.

9. Comments on load combination LC(3a) on Table 3H.5-8 (Sheets 1 through 5)

a. The subscript "s" for the term "E," should not be separated from the letter "E "

l b. The Note: " Yield stress at temperature:," should be replaced by " Yield stress at j temperature 240 *F:" l l 10. Westinghouse should provide an explanation describing the correlation between the cross-section numbers on Figure 3H5-1 (Sheets 1 through 3) and the design details of these critical sections shown on Figures 3H.5-2 through 3H.5-12.

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Enclosure , t 4

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11. Westinghouse should designate the following as Tier 2* information and include in the index provided in the DCD introduction:

a. Page 14.2-7, " Natural Circulation Tests" and "14.2.10.3.7" with expiration = First Plant at First Full Power.

b. Page 14.2-7, discussion of First Three Plant Tests without justifications and with expiration = Third Plant at First Full Power.

c. Pages 14.2-22 and 23, paragraph k) with expiration = Third Plant at First Full Power.

d. Page 14.2-24, paragraph s) with expiration = Third Plant at First Full Power.

e. Pages 14.2-24 and 25, paragraph w) with expiration = Third Plant at First Full Power.

f. Page 14.2-112, first sentence of Section 14.2.10.3.7 with expiration = First Plant at First Full Power,

g. Page 14.2-113, discussion under Test Method with expiration = First Plant at First Full Power. .

h. Page 14.2-114. discussion under Performance Criteria with expiration = First Plant at .

First Full Power.

12. Please explain how the setpoint 25,000 lb on pages 16.3-6 and 16.3-9 will be measured?

13. Please explain the basis for the setpoint 620F on page 16.3-9.

14. Please correct or explain the inconsistencies between the values in the surveillance requirements on page 16.3-24 and the corresponding Tier 1 information.

15. Westinghouse should add the following technical support documents to Table 1.6-1:

WCAP-14234, "LOFTRAN and LOFTTR2 AP600 Code Applicability Document." It should have a (P) designation as it is a proprietary report. A non-proprietary version is not l identified in the reference. (. - WCAP-14326, " Experimental Basis for the AP600 Containment Vessel Heat and Mass l Transfer Correlations," Revision 3, April 1998. i WCAP-14812," Accident Specification and Phenomena Evaluation for the AP600 Passive Containment Cooling System," Revision 2, April 1998. WCAP-14845," Scaling Analysis for AP600 Containment Pressure During Design Basis i Accidents," Revision 3, March 1998. J

16. Westinghouse should provide the applicable version, edition or date of the WCAPs that are referenced in Section 1.5.4 of the DCD.

1

17. Westinghouse must justify its changes to the PR/rbamd insights in Table 19.59-29 of the DCD from the approved version in the SSAR.

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18. Footnote (c) of Table 2-1 (Sheet 2 of 2), "With response spectra at the plant grade as  !

given in Figures 3.7.1-1 and 3.7.1-2," should be replaced by "With ground response , spectra (at plant grade) less than or equal to those given in Figures 3.7.1-1 and 3.7.1-2, j and with ground response spectra at the plant foundation level (40 feet below the plant i grade level) less than or equal to those given in Figures 3.7.1-18 and 3.7.1-19."  ! I w l l l l l. 1 a g ._ _}}