New Evaluations of Heavy Nuclide Data for JENDL-3.3

Abstract

New evaluations of nuclear data for Uranium, Plutonium, and Thorium isotopes which are essential for applications to nuclear technology were carried out for the Japanese Evaluated Nuclear Data Library, JENDL-3.3. The objectives of the current release of JENDL were to fix several problems which have been reported for the previous version, to improve the accuracy of the data, and to evaluate covariances for the important nuclides. Quantities in JENDL-3.2 were extensively re-evaluated or replaced by more reliable values. The heavy nuclide data in JENDL-3.3 were validated with several benchmark tests, and it was reported that the current release gave a good prediction of criticalities.

Keywords:

• JENDL-3.3
• cross section
• neutron
• evaluation
• uranium
• plutonium
• thorium
• covariance
• simultaneous evaluation
• prompt fission neutron spectrum
• direct/semidirect capture