Methods for calculation of the neutron resonance reactions in therma nuclear reactors are developed, verified against experiments and mutually compared. The intention is partly to demonstrate the potential of modern computation technique in this field and partly to select those methods among the primitive approximations that show the best agreement with sophisticated calculations. The methods investigated comprise intermediate resonance semi-analytic methods, statistical treatment and numerical heterogeneous or homogeneous slowing-down calculation with resonance overlap included or excluded. The influence of detailed spatial flux distribution, the accuracy of the equivalence principles and methods of constructing effective group cross sections from simple resonance integral tabulations have received special attention. It is concluded that the best way to profit from the improved resonance reaction treatments in standard multi-group reactor computation is to make use of tabulations as those just mentioned. Apart from summarizing of these studies the report describes the RBSAB programme system developed in connection with the investigation.
|Place of Publication||Roskilde, Denmark|
|Publisher||Risø National Laboratory|
|Number of pages||167|
|Publication status||Published - 1970|
|Series||Denmark. Forskningscenter Risoe. Risoe-R|
- Risø report 234