Integral Test of Neutron Data and Comparison of Codes by Re-analysis of the SEG and STEK Experiments

Sample reactivity measurements performed at the fast-thermal coupled facilities RRR/SEG (RC Rossendorf) and STEK (ECN Petten) have been re-analyzed using the JNC standard route for reactor calculation JENDL-3.2 // SLAROM / CITATION / PERKY. The C/E-values are compared with results obtained with the competitive European scheme JEF-2.2 // ECCO / ERANOS. When using different input libraries, codes, self-shielding treatments, and likewise different energy group structures in the routes, it is very difficult to locate exactly the source of deviations in the C/E-values. Therefore, a cross-wise use of JEF-2.2 with JNC codes was performed to obtain separate information about data and codes. Furthermore, test calculations have been made to investigate special effects. More comparisons of data libraries and routes, desirable in crisscross way, are recommended to overcome specific disadvantages in integral tests.