JAERI/US calculational benchmarks for nuclear data and codes intercomparison

Prior to analyzing the integral experiments performed at the Fast Neutron Source Facility at the Japan Atomic Energy Research Institute (JAERI), both US and JAERI analysts have agreed on four calculational benchmark problems proposed by JAERI to intercompare results based on various codes and data bases used independently by both countries. To compare codes, the same data base is used (ENDF/B-IV). To compare nuclear data libraries, common codes were applied. Some of the benchmarks chosen were geometrically simple and consisted of a single material to identify clearly sources of discrepancies and thus help in analyzing the integral experiments