ML20151T144
| ML20151T144 | |
| Person / Time | |
|---|---|
| Issue date: | 09/02/1998 |
| From: | Wen P NRC (Affiliation Not Assigned) |
| To: | Drake A WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| References | |
| PROJECT-694 NUDOCS 9809090256 | |
| Download: ML20151T144 (4) | |
Text
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l September.2, 1998 l
Mr. Andrew Drake I
Westinghouse Owners Group Westinghouse Electric Corporation Mail Stop ECE 5-16 P.O. Box 355 i
Pittsburgh, PA 15320-0355 i
i
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION FOR WESTINGHOUSE TOPICAL REPORT WCAP-14483, " GENERIC METHODOLOGY FOR EXPANDED CORE OPERATING LIMITS REPORT" -
Dear Mr. Drake :
L By letter dated December 1,1995, the Westinghouse Owners Group (WOG) submitted
- Westinghouse topical report WCAP-14483 for NRC review. In a recent telephone conversation, the WOG requested the staff to complete the review expeditiously. The staff has now l
completed the preliminary review and has determined a need for additional information. The l
attachment to this letter identifies the information required. Please address your response to
)
the NRC Document Control Desk and reference WOG Project No. 694.
i I
If you have any questions, please contact me at 301/415-2832 (email, pxw@nrc. gov) or Larry j
l_
Kopp at 301/415-2879 (email, lik@nrc. gov).-
l Sincerely,
{
Original Signed By i
Peter C. Wen, Project Manager l
j-Generic Issues and Environmental l
L Projects Branch Office of Nuclear Reactor Regulation i
Enclosure:
Questions on Topical
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s September 2, 1998 Mr. Andrew Drake Westinghouse Owners Group Westinghouse Electric Corporation Mail Stop ECE 5-16 P.O. Box 355 Pittsburgh, PA 15320-0355
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION FOR WESTINGHOUSE TOPICAL REPORT WCAP-14483, " GENERIC METHODOLOGY FOR I
EXPANDED CORE OPERATING LIMITS REPORT"
Dear Mr. Drake :
By letter dated Decembcr 1,1995, the Westinghouse Owners Group (WOG) submitted Westinghouse topical report WCAP-14483 for NRC review. In a recent telephone conversation, the WOG requested the staff to complete the review expeditiously. The staff has now completed the preliminary review and has determined a need for additional information. The attachment to this letter identifies the information required. Please address your response to the NRC Document Control Desk and reference WOG Project No. 694.
If you have any questions, please contact me at 301/415-2832 (email, pxw@nrc. gov) or Larry Kopp at 301/415-2879 (email, lik@nrc. gov).
Sincerely, R c. &
Peter C. Wen, Project Manager Generic issues and Environmental Projects Branch Office of Nuclear Reactor Regulation
Enclosure:
Questions on Topical WCAP-14483
4 REQUEST FOR ADDITIONAL INFORMATION TOPICAL REPORT WCAP-14483 1)
It is recognized that DNB and fuel centerline melt are the true safety limits. However, since these are not measurable quantities, they do not meet the requirements of 10 CFR 50.36 which states that technical specification safety limits are limits upon important process variables. Justify how the requirements of 10 CFR 50.36 would still be met if Figure 2.1.1-1 were deleted.
2)
Some plants operate with lower steam generator tube plugging levels and thus higher RCS flow rates compared to what is assumed in the safety analyses. However, a change in RCS flow from cycle-to-cycle is an indication of a physical change to the plant that should be reviewed by the staff. We therefore recommend that if RCS flow rate is relocated to the COLR, the minimum limit for RCS total flow based on a staff approved analysis (e.g., maximum tube plugging) should be retained in the technical specifications similar to what is done for the positive limit on moderator temperature coefficient.
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Enclosure l
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l Westinghouse Owners Group Project No. 694 1
CC:
Mr. N'cholas Liparulo, Manager i
Equipment Design and Regulatory Engineering Westinghouse Electric Corporation
' Mail Stop ECE 4-15 P.O. Box 355 Pittsburgh, PA 15230-0355
. Mr. Andrew Drake, Project Manager Westinghouse Owners Group Westinghouse Electric Corporation Mail Stop ECE 5-16 P.O. Box 355 Pittsburgh, PA 15230-0355 Mr. Jack Bastin, Director Regulatory Affairs Westinghouse Electric Corporation 11921 Rockville Pike Suite 107 l
Rockville, MD 20852 Mr. Hank Sepp, Manager Regulatory and Licensing Engineering Westinghouse Electric Corporation PO B'Jx 355 Pitti, burgh, PA 15230-0355 l
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