In this study, neutronic behaviour of a peaceful nuclear explosion reactor (PACER) producing approx 1.2 GWe power from fusion explosions is analysed considering ThF{sub}4 and UF{sub}4 as fissile zones. UF{sub}4 and ThF4 are put in to the system adjacent to the inner-side of the flibe coolant zone positions (distance between explosive region and fuel zone, DR = 50, 100, 200, 400, 500 and 700cm). Flibe percentages are taken to be 25, 50, 75 and 100. It is found that optimum combinations of fissile zone thickness, coolant zone position and coolant percentages are 10cm, 200cm and 25 flibe for UF{sub}4 and 10cm, 50cm and 25 flibe for ThF{sub}4. The behaviour of fuels mentioned above has been observed over a period of 30 years at discrete time intervals, Δt = 30 days. In the case of UF{sub}4, M values at DR = 200cm reach 5.35, 5.22,4.88, and 4.88 from 3.12, 2.98,2.83 and 2.83, for 25, 50, 75,100 flibe respectively. For ThF{sub}4 at DR = 50 cm, M values reach from 1.61, 1.54, 1.50 and 1.46 to 1.93, 2.00, 2.04 and 1.99 for 25, 50, 75, 100 flibe respectively. Cumulative fissile fuel breeding (CFFE) values reach up to 5.5 from 0-7 at DR = 200 and 25 case for UF{sub}4, and up to 6-36 from 0, at DR = 50 and 25 flibe, for ThF{sub}4, at the end of the operation period.
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