HTGR Knowledge Base

Conference Article: The influence of dust on the hazard potential of a depressurization accident of a high temperature reactor

Iniotakis, N.; Decken, C.B. von der (Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.))

Abstract

The possible hazard to the environment in case of accidents of a high temperature reactor depends on the behaviour of the fission and activation products in the primary cooling circuit of the reactor. The behaviour of the fission products is influenced considerably by the presence of dust in the system. Extended work has been done and is going on in the Institute for Reactor Components to investigate the consequences of severe accidents. A large number of accident sequences are under investigation. The paper describes as an example the investigations which have been carried out to get qualitative and quantitative results about the release of non noble gas fission products into the containment as a consequence of a depressurization accident. The presence of dust in the primary cooling circuit of the reactor is specially taken into account.

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key words: depressurization; dusts; fission products; htgr type reactors; primary coolant circuits; radiation hazards; radionuclide migration; reactor accidents; accidents; cooling systems; gas cooled reactors; graphite moderated reactors; hazards; health hazards; isotopes; radioactive materials; reactor components; reactor cooling systems; reactors
Reference:
Specialists meeting on coolant chemistry, plate-out and decontamination in gas-cooled reactors Juelich, Federal Republic of Germany 2-4 December 1980
International Atomic Energy Agency, Vienna (Austria)
IWGGCR--2, pp:81-87