Shielding Calculations in Support of the Spallation Neutron Source (SNS) Proton Beam Transport System

Abstract

Determining the bulk shielding requirements for accelerator environments is generally an easy task compared to analyzing the radiation transport through the complex shield configurations and penetrations typically associated with the detailed Title II design efforts of a facility. Shielding calculations for penetrations in the SNS accelerator environment are presented based on hybrid Monte Carlo and discrete ordinates particle transport methods. This methodology relies on coupling tools that map boundary surface leakage information from the Monte Carlo calculations to boundary sources for one‐, two‐, and three‐dimensional discrete ordinates calculations. The paper will briefly introduce the coupling tools for coupling MCNPX to the one‐, two‐, and three‐dimensional discrete ordinates codes in the DOORS code suite. The paper will briefly present typical applications of these tools in the design of complex shield configurations and penetrations in the SNS proton beam transport system.