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
140 20. Siberian Chemical Combine (Tomsk), 13 December 1978 Plutonium metal ingots in a storage container; single excursion; one serious exposure, seven significant exposures. Vessel Volume Fissile Volume Fissile Mass Fissile Density 3.2 0.54 10.1 kg 18,700 g/ 44 mm 106 mm Estimated Spherical Critical Mass First Spike Yield Specific Spike Yield Total Yield 30 mm 88 mm 9.18 kg 0.03×10 17 5.6×10 15 0.03×10 17 222 mm
21. Novosibirsk Chemical Concentration Plant, 15 May 1997 Uranium oxide slurry and crust, U(70), in the lower regions of two parallel vessels; multiple excursions; insignificant exposures. Vessel Volume Fissile Volume Fissile Mass Fissile Density 800 mm 100 mm 140 mm 1000 mm 700.0 per vessel Estimated Spherical Critical Mass First Spike Yield Specific Spike Yield Total Yield * System description was not adequate to estimate parameter. * 17.1 kg * Vessel Length = 2000 mm 3500 mm * none none 0.055×10 17 141
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21. Novosibirsk Chemical Concentration Plant, 15 May 1997<br />
Uranium oxide slurry and crust, U(70), in the lower regions <strong>of</strong> two parallel<br />
vessels; multiple excursions; insignificant exposures.<br />
Vessel Volume<br />
Fissile Volume<br />
Fissile Mass<br />
Fissile Density<br />
800 mm<br />
100 mm<br />
140 mm 1000 mm<br />
700.0<br />
per vessel<br />
Estimated Spherical<br />
Critical Mass<br />
First Spike Yield<br />
Specific Spike Yield<br />
Total Yield<br />
* System description was not adequate to estimate parameter.<br />
*<br />
17.1 kg<br />
*<br />
Vessel Length = 2000 mm<br />
3500 mm<br />
*<br />
none<br />
none<br />
0.055×10 17<br />
141
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