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首页> 美国政府科技报告 >Travel to Russia to investigate Tomsk-7 explosion. Foreign trip report, June 18--29, 1993.
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Travel to Russia to investigate Tomsk-7 explosion. Foreign trip report, June 18--29, 1993.

机译：前往俄罗斯调查托木斯克-7爆炸案。外国旅行报告，1993年6月18日至29日。

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摘要

On April 6, 1993, at the fuel reprocessing (''radiochemical'') plant of the Siberian Chemical Combine in Tomsk-7, Russia, a sequence of events occurred that caused substantial physical damage to the facility. A runaway exothermic chemical reaction occurred in a large process vessel that contained a concentrated solution of uranyl nitrate along with nitric acid, plutonium nitrate, residual fission products totaling about 560 curies, and uncertain amounts of organic constituents derived from the solvent extraction process. This reaction produced copious amounts of flammable organic and inorganic gases and steam that pressurized and burst the vessel, dislodged the concrete cell cover, and then ignited in the area immediately above the cell. The resulting explosion caused substantial damage to the crane bay above the process area, blew out several hundred feet of non-reinforced masonry wall and a section of the roof, wrecked internal components, and started small roof fires. Fortunately, the solution involved had been through one cycle of extraction and purification, so the release of activity through the stack and the openings resulted in rather low-level contamination over the area of dispersal. Because the Siberian Chemical Combine at Tomsk-7 uses the PUREX process, similar to that used at US Department of Energy (DOE) facilities, the DOE has undertaken an effort to learn the details of this accident and its causes. This led to-direct contacts with the Russian experts reported. In this document, we report our understanding of the details of this accident as obtained from the Russian experts. These were used as a basis for an investigation of DOE processing operations that have a potential for accidents of this kind.

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