ML19260C971
| ML19260C971 | |
| Person / Time | |
|---|---|
| Issue date: | 01/22/1980 |
| From: | Solberg D NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | Durst J NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| References | |
| NUDOCS 8002070192 | |
| Download: ML19260C971 (3) | |
Text
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JAN 2 21980 MEMORANDUM FOR: Jay B. Durst, Assistant Director Safeguards & Systems Performance Research Branch Division of Safeguards, Fuel Cycle and Environmental Research FROM:
Donald E. Solberg, Chief Systems Performance Research Branch Division of Safeguards, Fuel Cycle and Environmental Research
SUBJECT:
SUMMARY
OF FUEL CYCLE FACILITY ACCIDENTS RESEARCH REVIEW GROUP MEETING On November 28-29, 1979, a meeting of the Fuel Cycle Facility Accidents Research Review Group was held in Silver Spring offices of NRC. Meeting attendees are presented in Enclosure 1.
The principal purpose of the meeting was to review accident compilations by PNL and ORNL so that the RRG could select a generic set of accidents for further investigation. The results presented by PNL and ORNL were only minimally useful in giving guidance in accident selection.
Nevertheless, accidents for future evaluation were selected as shown in item 2 below.
Further, since selection of parameters and defining values for these parameters for each of these accidents is the next phase for both OPNL and PNL, steps were taken to provide early availability and review of candicate parameters (item:; 4 and 5 below). Principal results of the meeting are:
1.
The review of available data from the NRC-SD sponsored project at ANL to computerize resul ts from all nuclear incidence reports (I. Muraka/C. Luner, project managers) revealed that fires and explosions are the most probable accidents and are approximately equally likely to occur. The AHL data set lacks some of the detailed infonnation required by our study and is incomplete in terms of the compilation of reported accidents.
It was agreed that when the remainder of these data become available, some additional effort will be spent in evaluating it, principally for the purpose of determining if the above conclusion on fires and explosions is altered.
2.
The accidents which are to be considered and for which parameters are to be developed are fires, explosions, equipment failure, criticality, dynamic and static spills and tornados.
Examples of equipment failure are failure of HEPA filters and fan failure.
M37 086 8002073, 47g
. 3.
The basis for conducting this research was reiterated at the meeting, i.e., to develop generically applicable data and analysis methods capable of evaluating airborne concentrations of radionuclides and their transport to the facility boundary.
4.
J. Mishima will prepare and' transmit a list of the most significant parameters for describing fires, explosions and criticality which can be used to bracket the entire significant range of accident scenarios.
5.
H. Godbee will prepare and transmit a list of the most significant parameters for describing liquid aerosols resulting from accidents in waste solidifi-cation plants. The purpose is to determine problems associated with analysis of entrained liquids which had not previously been considered in the LASL analysis development plan.
6.
The review group agreed that advanced reprocessing schemes should be reviewed to assure that the list of accident types and parameters covered by this research will include those needed to analyze accidents in the advanced reprocessing approaches. Specifically, ORNL was directed to make this detennination for the Hot Experimental Facility (HEF).
7.
PNL and ORNL will develop sets of parameters (as required in item 3 and further developed in item 4 and 5) for all accidents identified in item 2.
8.
LASL will proceed with the analytical and experimental plan. A draft copy of this plan dated November 28, 1979 was supplied to review group members T
at this meeting.
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Donald E. Solberg, Chief Systems Performance Research Branch Division of Safeguards, Fuel Cycle and Environmental Research
Enclosure:
LASL presentation material cc: Attendees M
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LIST OF ATTENDEES Bill Immerman NRC/RES A. T. Clark NRC/NMSS/FCAF R. A. Martin LASL W. S. Gregory LASL D. E. Solberg NRC/RES P. Owzarski PNL J. Mishima PNL R. W. Andrae LASL J. W. Bolstad LASL P. K. Tang LASL J. E. Ayer NRC/NMSS/FCAF H. Godbee ORNL E. Frederick ORNL E. Compere ORNL P. Loysen NRC/NMSS/FCAF O
I 1937 088