STATUS OF MCNP SENSITIVITY/UNCERTAINTY CAPABILITIES FOR CRITICALITY

摘要

A new capability is being developed in MCNP6 to provide estimates of uncertainties in the effective multiplication k because of nuclear cross sections. This has been implemented in a prototype version of MCNP6. The version reads covariance data from the nuclear data libraries, runs a continuous-energy transport calculation to compute sensitivity profiles on the energy grids found in the covariance data, and convolves them to produce estimates of the k uncertainty. Results are shown for eight criticality benchmark experiments.