Proliferation resistance properties of u and Pu isotopes

Within the large area of issues covered by term of proliferation resistance, the only technical characteristics were chosen as a subject for discussion. The present study concentrates on intrinsic proliferation resistance features focusing the material characteristics associated with bare critical mass (BCM), decay heat (DH) and spontaneous-fission neutrons (SFN), which are treated as the main constituents of isotopic barriers against proliferation. The present study aims at determining major proliferation resistant attributes for U and Pu. This determination is largely based on analysis of their critical bare spheres. The MCNP code coupled with JENDL 3.2 data library is the main tool applied for this study. The other characteristics were summarized from the data available in scientific literature.