| Popis: |
Physical data about the Chernobyl accident has been collected inside the Shelter, near the destroyed unit, and from fallout. This paper summarizes accident analyses conducted in 1986 (a short time after the April 26, 1986 accident), analyses conducted in 1995 and 1996 with the Ukrainian Academy of Sciences, analyses by Russia's MinAtom in 1996, and results of continuing analyses. "TECHOCENTRE" is evaluating ways to remove fuel and radioactive material. The Institute for Fast Mechanical Processes (IFMP) is analyzing the explosion. CINRS is analyzing data on the explosions results and analyzing the accident sequence. Forensic analyses are usually undertaken in the West after significant accidents, such as aircraft crashes and industrial accident. These receive considerable exposure and are necessary to understand the causes and provide a basis for taking appropriate corrective action. For a number of reasons such an analysis of the Chernobyl accident was not initiated until January 1994. Results have shown that the Chernobyl accident sequence is considerably different from that originally assumed. The major explosion did not occur in the reactor cavity, as originally assumed, but in the air more than 15 meters above the operating floor of the unit. The destruction of the building was caused by fuel vapor expansion created by a very rapid increase in reactivity in the fuel. |
