Adaptation strategy of fuel element design and fuel element type for MPR

A program to use the silicide fuel for MPR-30 is being considered. The silicide line adapted for that is U3Si2Al. Attention should be paid for the fuel element design and specification, since they have an important role in determining the future of the reactor, from the technical point of view and from the economical point of view. The strategy must be given in dealing with the core physics - flux performance, primary system design - thermohydraulics justifications, safety and reactor economy. Fuel element having 20 and 21 plate are discussed and compared. The evaluating parameters used in this study are of course the safety of the reactor operation, reactor performance, flow instability criteria and reactor economy. The MTR type fuel element using the following specifications of 20 plates, 0.735 meat thickness of U3Si2Al with uranium density < 4.8 gram/cc. and 0.38 mm/0.495 mm inner/outer cladding thickness seem to be a good choice for MPR-30 (RSG-GAS). (author)