In WWER-type nuclear power plants, the fuel pin which generates the highest power level is located at the corner of fuel assembly. This makes necessary the investigation of the asymmetry in the temperature and power distributions within an elementary cell. Coupled neutron physical and thermohydraulical models are needed for this purpose. One of the most suitable neutron physical model is the method of collision probabilities (CP). A program was developed for the calculation of CP in two dimension. The elementary cell is divided into regions which are not necessarily convex. (R.P.) 2 refs.; 6 figs.
Hordosy, G 
- Hungarian Academy of Sciences, Budapest (Hungary). Central Research Inst. for Physics