ML20049A505
| ML20049A505 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Crane |
| Issue date: | 03/30/1981 |
| From: | Rosa F Office of Nuclear Reactor Regulation |
| To: | Haass W Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20033C447 | List: |
| References | |
| FOIA-82-176 NUDOCS 8104030659 | |
| Download: ML20049A505 (2) | |
Text
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UNITED STATES 8"'e
~k NUCLEAR REGULATORY COMMISSION (p
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MEMORANDUM FOR: George W. Knighton, Chief Research & Standards Coordination Branch l
Division of Safety Technology j
FRCit:
Faust Rosa, Chief Instrumentation & Control Systems Branch Division of Systems Integration
SUBJECT:
ORNL PROPOSAL FOR THE STUDY OF "C0ftTROL SYSTEMS AND PLANT DYflAMICS"
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Mr. Jim Watt forwarded Oak Ridge National Laboratory proposal entitled
" Control Systems and Plant Dynamics" to the Instrumentation and Control l
Systems Branch for review. This memorandum contains coments on the proposal and the need for such a research program.
a The Generic Issues Branch is currently preparing a Task Action Plan to
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address the unresolved safety issue on " Safety Implications of Control J
Systems."
It is expected to take approximately three months for prepara-tion and approval of this plan. We recomend that no outside contractual
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effort on the subject of control system effects be undertaken until the detailed plan for the unresolved safety issue has been completed and i
approved within NRR.
The specific program contained in the ORNL proposal is directed towards 3
analyses which are properly the responsibility of applicants and licensees to provide. The applicants and licensees would presumably obtain such I
The NRC analyses from the reactor plant vendors and architect engineers.
1 role should be:
To work with applicants and licensees in delineating criteria Il 1) which control systems should meet for insuring safe plant operation.
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- 2) To work with applicants and licensees in identifying the analyses necessary to insure that the criteria of 1 above are met.
To review the adequacy of the analyses in 2 above.
3)ICSB would consider it appropriate to use ORNL for specific tasks related to the NRC role.
In particular, ORNL could be useful in reviewing the adequacy of analyses submitted by applicants and licensees to demonstrate that criteria c
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'l applicable to control systems are met.
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Contact:
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~s-a We do not consider it appropriate for ORNL to expend major effort in the creation of a light water reactor analog / hybrid plant systems simulator or to perfonn failure mode and effects analyses of control systems as described in the proposal. The reactor plant vendors and architect engineers are most familiar with their control system designs and, thus, most qualified to analyze the effects of failure modes. Furthermore, many plant simulation models We would consider a much more modest and less costly ORNL already exist.
effort directed at reviewing analyses submitted by applicants and 1fcensees However, a final decision on the level of ORNL involvement to be sufficient.
in control system studies should be delayed until the unresolved safety issue plan is completed.
The ACRS Subconnittee on Electric Power Systems is currently reviewing the NRC staff approach to the review of control systems. Consideration should, therefore, be given to asking this subcommittee for comments on both the ORNL proposal and the ICSB response contained in this memorandum.
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Faust Rosa, Chief Instrumentation & Control Systems Branch Division of Systems Integration cc:
D. Ross P. Check F. Schroeder X. Kniel T. Dunning M. Srinivasan W. Fanner A. Szukiewicz D. Basdekas C. Rossi 1
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