SAFETY ANALYSES RELATED TO THE POSSIBLE RELEASE OF ACTIVATED EROSION DUST IN FUSION REACTORS
A possibly critical safety problem in NET and power fusion reactors could be the release of activated erosion dust. Due to plasma - wall interactions, material is eroded from the surfaces of plasma facing components and the possibility that some of the material may exist as dust cannot be excluded. In this paper, we examine the consequences of the possible mobilization and release of activated dust following a major accident in NET involving the sudden opening of a connection between the evacuated plasma chamber and the reactor hall. Two aspects of the accident sequence have been examined with the aid of theoretical considerations and computer calculations. The first is the propagation of shock waves associated with the first inrush of air. The second is the transport of erosion dust out of the plasma chamber as the inrushing air subsequently heats up and expands. The dust expulsion process is modelled in a conservative way to obtain an upper bound of the amount of dust which could be discharged.
Bibliographic Reference: 14TH SOFT, AVIGNON (FRANCE), SEPT. 8-12, 1986 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32915 ORA
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Record Number: 1989125054100 / Last updated on: 1987-11-01
Available languages: en