A Review of Criticality Accidents A Review of Criticality Accidents
A Review of Criticality Accidents A Review of Criticality Accidents A Review of Criticality Accidents A Review of Criticality Accidents
120 APPENDIX B EQUIPMENT DIAGRAMS AND TABULAR PHYSICAL AND YIELD DATA FOR THE 22 PROCESS ACCIDENTS Part I contains a section immediately following the description of the 22 nd accident entitled, “Physical and Neutronic Characteristics for the Process Facility Criticality Accidents.” Therein are described the many unknowns, approximations, and uncertainties associated with the simplified re–constructions and data tabulations. The yield and specific yield values in the tables of this appendix are reported in units of fissions and fissions per liter, respectively. This same information is presented here in a new format to facilitate an understanding of the approximate geometry and yield data associated with each process accident. While this information would never qualify as benchmark data (computations could be performed, but the value of the answers would be highly questionable), it may prove useful to students and teachers at universities and to criticality staff as they provide (training) lectures to operating personnel.
1. Mayak Production Association, 15 March 1953 Plutonium nitrate solution in an interim storage vessel; single excursion; one serious exposure, one significant exposure. Vessel Volume Fissile Volume Fissile Mass Fissile Density 40.0 31.0 0.81 kg 26.1 g/ 200 mm Estimated Spherical Critical Mass First Spike Yield Specific Spike Yield Total Yield 247 mm 0.67 kg unknown unknown ~2.0×10 17 319 mm 121
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1. Mayak Production Association, 15 March 1953<br />
Plutonium nitrate solution in an interim storage vessel; single excursion; one<br />
serious exposure, one significant exposure.<br />
Vessel Volume<br />
Fissile Volume<br />
Fissile Mass<br />
Fissile Density<br />
40.0<br />
31.0<br />
0.81 kg<br />
26.1 g/<br />
200 mm<br />
Estimated Spherical<br />
Critical Mass<br />
First Spike Yield<br />
Specific Spike Yield<br />
Total Yield<br />
247 mm<br />
0.67 kg<br />
unknown<br />
unknown<br />
~2.0×10 17<br />
319 mm<br />
121
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