A general conclusion is that under some circumstances, the yield predicted during disassembly is relatively insensitive to modelling assumptions, and a simple code such as EXTRA may prove adequate if explicit core displacements are not required. Some comparisons are made with published results from the VENUS-II disassembly code. Here, the effects of several factors, such as the presence of retained fission gases and possible restraints on fuel motion, are investigated. The results and implications of disassembly calculations using the code EXTRA are presented. Predisassembly computer codes are described in general, and several particular codes are examined in more detail, based on a literature survey. The course of an incident is split into several stages of these only predisassembly and disassembly are considered. Loss of Flow and Transient Overpower faults are possible the potential consequences of such incidents are analysed using a deterministic approach. The advantages of the fast reactor are given and the general design outlined. International Nuclear Information System (INIS) Studies of fast reactor disassembly using a Bethe-Tait computer code
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