Publication Laka-library:
Experimental studies of neutron irradiated UO2.. (1990)
| Author | R.H.J.Tanke |
| Date | June 1990 |
| Classification | 6.01.2.10/28 (TECHNICAL - GENERAL INFORMATION) |
| Front | 
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From the publication:
Summary and outline In the most common types of nuclear reactors the fuel has the ceramic form of uranium dioxide (UO2). Fission of uranium leads to heat production inside the fuel by collision of energetic fission products with atoms of the UO2-matrix. As a result the microstructure of the fuel becomes very complex. The fission products are incorporated into the nuclear fuel. During normal operation of the nuclear reactor only a small part of the gaseous products can escape from the fuel. Most of the fission products are radioactive and they form, when released from the reactor, a health hazard for the population. In case of an accident situation, in which the heat of the nuclear fuel can no longer be transferred to cooling water, the temperature of the nuclear fuel may rise very strongly, so that the other fission products may also be released. In fact, the release of fission products from overheated nuclear fuel is the first step in along series of steps, which can ultimately lead to the release of radioactive substances from the nuclear power station into the environment. In this respect, it is important to know more about both the release rate of the various fission products and their chemical forms.
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