The neutronic aspects of U–9Mo as a LEU fuel for Low-power reactors

Abstract

The use of a high-density low-enriched uranium fuel in low-power reactors was investigated. These reactors can be run on this fuel without changing either dimensions of the fuel meat or the cladding. The new reactor is safer in the accidental conditions but it is not in the normal operation. The power of the reactor is higher by about 19.5%. The initial excess reactivity is reduced to 3.5950 instead of 3.980 mk. Fifteen new dummy rods are added to the core of the reactor substituting as many as fuel rods. No changes to the cladding material are required.