neutron shielding

Neutron shielding components design concept and structure features of ITER ( International Thermonuclear Experimental Reactor) vacuum vessel were briefly introduced. Static and thermo-structure coupling analyses were performed based on FEM ( finite element method) software ANSYS, respectively.

根据ITER（International thermonuclear experimental reactor）真空室中子屏蔽组件的设计概念和结构特点，应用有限元分析软件ANSYS对结构组件进行静力学分析和热&结构耦合分析。

The epithermal neutron activation analysis ( ENAA) using BN and BN+ Cd as thermal neutron shielding materials was used to determine the contents of iodine in 20 Chinese biological standard reference materials ( SRMs).

用氮化硼（BN）和镉＋氮化硼（Cd＋BN）作屏蔽材料的超热中子活化法对我国20种生物标准参考物质中的碘含量进行了分析。

These elements alone, however, are not quite as satisfactory for neutron shielding.

然而, 单用这些物质来防护中子不见得十分令人满意.