ML19347F600
| ML19347F600 | |
| Person / Time | |
|---|---|
| Issue date: | 04/23/1981 |
| From: | Fischer D Office of Nuclear Reactor Regulation |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8105220072 | |
| Download: ML19347F600 (2) | |
Text
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WASHINGTON, D. C. 20555
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!{^1,u.seawa p '8i MEMORANDUM FOR:
Dennis L. Ziemann, Chief Procedures and Test Review Branch Division of Human Factors Safety
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Section B - Tests Procedures and Test Review Branch Division of Human Factors Safety FROM:
Brent Clayton Procedures and Test Review Branch Division of Human Factors Safety
SUBJECT:
MEETING
SUMMARY
BROOKHAVEN NATIONAL LABORATORY On April 16, 1981, we met with representatives of.Brookhaven National Laboratory. They gave a presentation on the possible use of the Super Systen Code (SSC-W) for independent evaluation of startup transient test acceptance criteria for water-moled reactors. At present, the code models only once-through steam generators (i.e., B&W plants) and very little of the secondary system for PWRs. Additional development of the code would be necessery to model the secondary before it would be acceptable for predicting the results of startup transient tests such as turbine trip, MSIV closure, or feedwater heater bypass.
Additional modeling would also be required before the code could be used for plants with U-tube steam generators or BWRs. At best, it would take several months before the code would be available for use in predicting test results for plants scheduled for startup in the nexttwoyears(Westinghouse,CE,andGE).
The biggest advantage to the SSC-W code (as compared to existing codes in use by Reactor Systems Branch) is that it will require less computer time to run. However, it appears that actual computer time is a small fraction of the total cost of running code cases, so this ddvantage appears to be minimal.
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Dennis L. Ziemann
~ April 23, 1981 Due to the time delay in preparing this code for use, the apparently low cost-effectiveness of using it, and the cost that would be associated with developing the code, I have concluded that we should not opt for the development and use of SSC-W.
Instead we should request assistance from RSB in evaluating the applicants' acceptance criteria for the transient tests and their methods of establishing the criteria. We intend to try this approach on several upcoming Chapter 14 reviews.
Brent Clayton Procedures and Test Review Branch Division of Human Factors Safety
Enclosures:
1.
List of Attendees 2.
Copy of BNL Slides cc w/o enclosures:
S. Hanauer J. Kramer' S. MacKay W. Long F. Liederbach T. Speis
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