Assessment of thermal shock attenuation in the particle bed of the spallation neutron source collimator.

Simos, ; Ludewig, ; Walker, ; Catalan-Lasheras, ; Wei,

Technical Information Center Oak Ridge Tennessee

关键词: Collimators;    Particle beds;    Attenuation;    Neutron sources;    Proton beams;   

RP-ID  :  DE2001776728

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

A thermal shock analysis in a particle bed that surrounds the Spallation Neutron Source (SNS) beam tube in the various collimation locations is performed using a detailed thermal/stress wave propagation formulation. The goal of this effort is to assess the response of the particle bed when subjected to the full proton beam under off-normal operating conditions and its ability to attenuate the induced stress shock. Conclusions are drawn on the basis of comparison between the responses of (a) the individual particle bed elements, (b) an arrangement of elements comprising the particle bed and (c) an equivalent porous-less material with the density of the particle bed.