No abstract

No abstract

Continuous efforts have been made to perform basic and feasibility studies for the design of high conversion light water reactors (HCLWRs) at Japan Atomic Energy Research Institute (JAERI), several universities, PWR and BWR fabricators and utilities. The design efforts have aimed at achieving both high conversion and high burnup. This paper reviews the recent activities related to the development of HCLWRs in Japan.

A new method for intermediate treatment of resonance absorption developed for homogeneous systems has been applied to heterogeneous systems. In the present method, the interference between potential and resonance scattering is taken into account. Also taken into account is the temperature dependence of the parameters used in the intermediate treatment.By making use of the Wigner type of simple rational approximation for the collision probability, heterogeneous systems are treated by means of the intermediate-resonance absorption, and an analytic expression is given for calculating the resonance integral.

No abstract