ML19276E575
| ML19276E575 | |
| Person / Time | |
|---|---|
| Issue date: | 01/25/1979 |
| From: | Fabic S NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | Cudlin R, Tedesco, Zuber N Office of Nuclear Reactor Regulation, NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| References | |
| NUDOCS 7903200003 | |
| Download: ML19276E575 (6) | |
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UAN 2 5 1::,,9 Those On The Attached List Gentlemen:
Subject:
Meeting Minutes of the Containment Code Review Group Enclosed you will find the meeting minutes of the Containment Code Review Group which took place in Silver Spring on January 10, 1979.
Sincerely, V
S. Fabic, Chairman Containment Code Review Group Division of Reactor Safety Research
Enclosure:
as stated 7903200003
f Addressees for Letter Dated N. Zuber R. Cudlin R. Tedesco W. Butler J. Kudrick C. Anderson G. Lainas D. Eisenhut C. Grimes W. Paulson E. Imbro A. Sonin, MIT I. Catton, UCLA R. Lahey, RPI RP~b o t
CONTAINMENT CODE REVIEW GROUP MEETING MINUTES Place and Date: Silver Spring, January 10, 1979 Attendees: Attachment 1
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Introduction:==
A meeting of the Containment Code Review Group was held on January 10, 1979, in Silver Spring, Maryland. The meeting agenda is enclosed as Attachment 2.
Discussion:
S. Fabic opened the meeting with an overview of the research budget for FY 1980 in the area of containment.
It was noted that a general phasecut of LOCA related work was anticipated by 1981.
S. Fabic also discussed the philosophy to be applied to code verification and indicated the importance of identifying the code output parameter (s) which would be used as the basis for containment code assessment.
R. Cudlin provided a brief review of the status of containment programs at LLL and EG&G.
It was determined that, in general, results of research work applicable to Mark I and Mark II containments would be needed by the end of CY 1979 to be timely for the related generic activities.
W. Butler indicated a pcssible longer term need in the event that licensing hearings raised additional issues.
Need for Confirmatory (Independent) Mark III Data:
GE has performed extensive air and steam venting tests, including full scale, st.ce 1972 In the area of air venting, MIT (Sonin) has investigated distorted scaling effects for horizontal vent geometries.
J. Kudrick stated that a preliminary assessment of the Mark III data base had not disclosed any needs for confirmatory (independent) data, but cautioned that this was still a tentative conclusion.
It was the concensus of the Review Group, that no independent, Mark III related research should be planned, unless changes are made in NRR assessment of the Mark III issues and data base.
Extension of BEACON to BWRs/ Ice Condensers While several specific calculations could be identified where this added capability would be required, it was observed that some calculations of interest, in this particular area, were already within the scope of MOD 2A.
It was the concensus of the review group that assessment of BEACON in its present form was of the highest priority and that extensions of the code should not be undertaken at this time.
2-Assessment Program for BEACON Having established a high priority for the BEACON /M0D 2A code assessment program, discussion centered on the proposed approach and, in particular, sources of experimental data.
S. Fabic described the use of basic tests, separate effects tests, and integral tests in a code assessment program.
It was indicated that sufficient basic test data probably existed and that this data was being organized as part of the TRAC code assessment. The REBECA tests to be perfonned in France would provide especially useful two-phase-two component critical and subcritical flow data for assessment of the code's capability to handle situations that may arise in the openings between compartments.
There also appears to be plentiful integral test data for containments, especially from the foreign sources. BEACON runs have already been done for several of the Battelle-Frankfurt D-series tests as part of the containment standard problem. The Review Group did not see any major impediments for this phase of code assessment.
Availability of sufficient separate effects data representative of containment thermal-hydraulic conditions was identified as a potential gap in the data base. Specifically, there is a lack of test data for assessment of the code's ability to calculate changes in the. liquid, vapor and air concentration between adjacent compartments, as well as concentration and velocity distributions within compartments and liquid deentrainment characteristics.
It was agreed that RES would proceed with development of the code assessment matrix for BEACON and through that process identify specific areas where data is lacking.
RES hopes to be able to ascertain the importance of the lacking information and its impact on code assessment.
NRR will issue a research request to supplement the data base if it is determined that the information sought is
.important for determining safety margins.
S. Fabic indicated that RES would have the code assessment matrix completed in 2-3 months.
Miscellaneous A proposal for a compilation of information about time dependent flows about submerged structures by Professor Sarpkaya (Naval Postgraduate School) was discussed. The review group recorrmended against supporting that work.
A proposal by LASL on heat and mass transfer studies was discussed.
J. Kudrick noted that further progress on NRR Category A Task A-21, Main Steam Line Break Inside Containment, could result in added emphasis on heat transfer to both containment heat sinks and components (for evaluation of environmental qualification under saturated and superheated steam conditions. Without definitive knowledge of specific needs at this time, it was decided that the LASL proposal would be rejected subject to further review in the future, i
4 Containment Code Review Group Meeting Attendance
,o R. Cudlin, RES/ADB S. Fabic, RES/ADB G. Mansfeld, RES/GRS C. Grimes, 00R/PSYB I. Catton, UCLA N. Zuber, RES/ADB A. Sonin, MIT F. Chiang, RES J. Kudrick, DSS /CSB C. Anderson, DSS /CSB J. Glynn, DSS /CSB W. Butler, DSS /CSB G. Lainas, DSS /CSB t
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'JAN0 3197g To Those On Attached List Gentlemen:
The next meeting of the Containment Code Review Group is scheduled for January 10, 1979, to be held in the 12th floor conference room. Willste Building (Silver Spring), starting at 9:00 a.m.
This meeting will in-volve only the NRC review group members and consultants. No contractor's presentations will be made.
Agenda Experimental Need for independent test data for Mark III containment?
Need for additional test data for containment computer code verification?
Code - BEACON Should BEACON be extended to consider other types of containment?
Mark I, II, III Ice condensers Verification Program - obtain Review Group coments on:
proposed approach sources of data CASP Results: Discuss comparison of BEACON calculation and test data for D-15.
This is an important programmatic meeting.
I hope you can all make it.
Sincerely, b
S. Fabic, Chairman Containment Code Review Group Division of Reactor Safety Research t
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