DHLW Glass Waste Package Criticality Analysis

This analysis is prepared by the Mined Geologic Disposal System (MGDS) Waste Package Development Department (WPDD) to determine the viability of the Defense High-Level Waste (DHLW) Glass waste package concept with respect to criticality regulatory requirements in compliance with the goals of the Waste Package Implementation Plan (Ref. 5.1) for conceptual design. These design calculations are performed in sufficient detail to provide a comprehensive comparison base with other design alternatives. The objective of this evaluation is to show to what extent the concept meets the regulatory requirements of indicate additional measures that are required for the intact waste package. The multiplication factor (k-eff) of the disposal packages is determined using the Monte Carlo Neutron transport technique implemented in the MCNP (Ref. 5.5) computer program. The resulting k-eff values for a variety of configurations are then used to evaluate the criticality potential of the disposal package and the acceptability of the design in meeting design requirements and criteria.