ML20154J067
| ML20154J067 | |
| Person / Time | |
|---|---|
| Issue date: | 10/08/1998 |
| From: | Wen P NRC (Affiliation Not Assigned) |
| To: | Essig T NRC (Affiliation Not Assigned) |
| References | |
| NUDOCS 9810150159 | |
| Download: ML20154J067 (12) | |
Text
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October 8, 1998 MEMORANDUM TO: Thomas H. Essig, Acting Chiaf G:n:ric Issu s and Environmtntal Projects Branch Division of Reactor Program Management Office of Nuclear Reactor Regulation FROM:
Peter C. Wen, Project Manager Original Signed By:
Generic issues and Environmental Projects Branch Division of Reactor Program Management Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF SEPTEMBER 15,1998, MEETING WITH U
WESTINGHOUSE REGARDING REVISED PAD CODE On September 15,1998, a public meeting was held at Westinghouse's offices in Rockville, Maryland, between members of Westinghouse and NRC staff. Attachment 1 lists attendees at the meeting. Most portions of the meeting involved discussion of proprietary information. is a copy of the non-proprietary material handed out at the meeting.
The purpose of the meeting was to discuss the issues related to the revised PAD code. The meeting started with a Westinghouse representative presenting a meeting agenda and overview of PAD model changes. At this meeting, Westinghouse submitted the revised PAD code calibration and validation & verification (V&V) results (Westinghouse letter, NSD-NRC 5787, dated September 11,1998) for NRC review. The submittal also contained a description and justification of the changes requiring NRC approval that had been implementeo in the revised PAD code.
During the meeting, Westinghouse presented the resuRs of the code calibration and V&V as well as the model changes. In addition, a discussion was held to clarify the request for additional information (RAI) that had recently transmitted by the NRC to Westinghouse on the revised creep model (WCAP-15063-P).
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A number of questions were generated at this meeting. These are listed in Attachment 3.
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Westinghouse agreed to respond to these questions on an expedited schedulo.
3 With respect to the review of the revised PAD code, the staff agreed that Westinghouse's submittals of WCAP-15063-P and NSD-NRC-98-5787 are deemed as complete, and that no other submittals (other than responses to questions) are needed to continue the review.
It was explained by the Westinghouse representative that the target date for issuance of an SER in the December 98/ January 99 time-frame is very important to them in order to meet the M
4 schedule of coming licensing applic'ations. The staff replied that due to budgetary concems, there would have to be an intemal discussion before a commitment on schedule could be made.
.IL' Attachments: As stated cc w/atts: See next page DISTRIBUTION. See attached page
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October 8, 1998 MEMORANDUM TO: Thomas H. Essig, Acting Chief Generic issues and Environmental Projects Branch Division of Reactor Program Management Office of Nuclear Reactor Regulation FROM:
Peter C. Wen, Project Manager Od C. b
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Generic Issues and Environmenthi Projects Branch Division of Reactor Program Management Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF SEPTEMBER 15,1998, MEETING WITH WESTINGHOUSE REGARDING REVISED PAD CODE
~
On September 15,1998, a public meeting was held at Westinghouse's offices in Rockville, Maryland, between members of Westinghouse and NRC staff. Attachment i lists attendees at the meeting. Most portions of the meeting involved discussion of proprietary information. is a copy of the non-proprietary material handed out at the meeting.
The purpose of the meeting was to discuss the issues related to the revised PAD code. The meeting started with a Westinghouse representative presenting a meeting agenda and overview of PAD model changes. At this meeting, Westinghouse submitted the revised PAD code calibration and validation & verification (V&V) results (Westinghouse letter, NSD-NRC 5787, dated September 11,1998) for NRC review. The submittal also contained a description and justification of the changes requiring NRC approval that had been implemented in the revised PAD code.
1 During the meeting, Westinghouse presented the results of the code calibration and V&V as well as the model changes. In additic i, a discussion was held to clarify the request for additionalinformation (RAl) that had recently transmitted by the NRC to Westinghouse on the revised creep model (WCAP-15063-P).
A number of questions were generated at this meeting. These are listed in Attachment 3.
Westinghouse agreed to respond to these questions on an expedited schedule.
With respect to the review of the revised PAD code, the staff agreed that Westinghouse's submittals of WCAP-15063-P and NSD-NRC-98-5787 are deemed as comp! ate, and that no other submittals (other than responses to questions) are needed to continue the review.
It was explained by the Westinghouse representative that the target date for issuance of an i
SER in the December 98/ January 99 time-frame is very important to them in order to meet the schedule of coming licensing applications. The staff replied that due to budgetary concerns, there would have to be an intemal discussion before a commitment on schedule could be mada.
Attachments: As stated cc w/atts: See next page
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Distribution:- Mtg. Summary w/ Westinghouse Re Revised PAD Code Dated 10/8/98 Hard Cooy.
Docket Re PUBLIC PGEB R/F OGC.
ACRS PWen JLyons-SWu-HScott EMail SCollins/FMiraglia BSheron-RZimmerman BBoger JRoe DMatthews TEssig FAkstulewicz GHolahan SNewberry TCollins GTracey, EDO 1
NRC/ WESTINGHOUSE MEETING ON REVISED PAD CODE LIST OF ATTENDEES September 15,1998 I
1 NAME ORGANIZATION
. Jim Lyons NRR/SRXB Shih-Liang Wu NRR/SRXB Peter Wen '
NRR/PGEB Harold Scott RES/RPSB Cad Beyer PNNL Sumit Ray Westinghouse Ron Knott Westinghouse Scott Sidener Westinghouse David Colburn Westinghouse John Foster Westinghouse i
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Technical Meeting with XRC on j
Revised PAD Code l
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September 15th,1998 l
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Non-Proprietary
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l Agenda Introduction & Purpose of meeting Overview of PAD model changes L
Presentation of calibration and V&V results i
Detailed discussion of PAD model changes i
1 Discussion of creep model RAIs i
Licensing and implementation of revised j
PAD i
Non-Proprietary
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Background
b Meeting held with XRC on May 5th,1998 Creep model was discussed as the only major model change l
At that meeting, Westinghouse committed j
to :he followmg
- submit revised creep model WCAP (complete 6/98)
- provide confirmation of successful code V&V i
l Non-Proprietary
N Current Situation Revised creep model still remains the only major l
model change However, other model enhancements have been made that need NRC concurrence Model changes have been incorporated into the PAD code
- code calibration and V&V have been completed Westinghouse internal verification and review process ongoing i
Non-Proprietary i
Meeting Objective and Purpose Inform NRC of additional model changes 1
Present and submit calibration and V&V results j
Submit detailed information on additional model changes for NRC review
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Obtain NRC feedback to factor into W review process Discuss NRC RAIs on the Revised Creep Model WCAP j
Obtain concurrence on licensing process and schedule Non-Proprietary l
y Preferred Licensing Process and Schedule j
Description andjustification of additional model enhancements submitted at this meeting Calibration and V&V results submitted at r
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.this meetmg t
NRC review and W response to questions (9/98 - 11/98)
TER/SER (12/98 - 1/99)
Non-Proprietary
List of questions and requests generated during the 09/15/98 NRC/ Westinghouse meeting on revised PAD models
- 1. What were the as-filled and operating pressures of the Zion rods used in the creep model calibration? What were the operating conditions of stress for those rods?
- 2. Please show the statistics and plots related to thermal verification data for powers in excess of 9 kW/ft. Please identify each of the individual rods in the plots.
- 3. Is rod 432-6 from the Halden thermal calibration data generally over-predicted in centerline temperatures?
- 4. Supply an explanation of overall gap conductance equations used in PAD.
- 6. Please plot fission gas release verification results residual plots using M-P instead of M/P.
- 7. Does the temperature effect on irradiation growth affect the nozzle gap calculation ?
- 8. Please supply individual creep verification rod data which includes time average stress, time average temperature, and fluence. Give min., max. and average values for temperature and stress.
- 9. Please supply typical plots of the following:
a) Corrosion vs. Burnup b) Clad O.D. vs. Burnup c) CL-Temperature vs. Power and Bumup d) Rod Pressure vs. Burnup (IFBA and non-IFBA) e) Power vs. Bumup
- 10. Please correct Figure 3 of the fission gas release calibration section for proper axis l
titles.
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cc:
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~ Mr. Nicholas Liparulo, Manager.
L Equipment Design and Regulatory Engineering ;
y Westinghouse Electric Corporation. ~
- Mail Stop ECE 4-15
- P.O. Box 355 -
Pittsburgh, PA 15230-0355 Mr. Jack Bastin, Director
~ Regulatory Affairs Westinghouse Electric Corporation ' '
,11921 Rockville Pike'.
. Suite 107 4
Rockville,' MD 20852
. Mr. Hank Sepp, Manager Regulatory and Licensing Engineering Westinghouse Electric _ Corporation PO Box 355 Pittsburgh, PA.15230-0355_
Mr. Sumit Ray, Manager Fuel Licensing.
Westinghouse Electric Corporation
. PO Box 355-Pittsburgh, PA - 15230-0355 j
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