核电工程防辐射板/含硼聚乙烯板

含硼聚乙烯板的优点：聚乙烯是碳氢化合物，含氢量高，对快中子有良好的减弱能力，硼吸收热中子、铅对γ辐射的屏蔽特别有效，因此，铅硼聚乙烯板具有屏蔽快中子，热中子和γ辐射的综合屏蔽效果，含硼聚乙烯板的推广应用有助于屏蔽结构的简化，能够减轻屏蔽体的重量，缩小屏蔽体的体积。 含硼聚乙烯板具有良好的工程性能、尺寸稳定性好，具有较满意的耐γ辐射性能，使用温度为80~100℃，屏蔽热中子、快中子和γ辐射性能明显优于聚乙烯，研究表明含硼防辐射聚乙烯板能够有效的防止核辐射及中子辐射给个人及社会造成的危害。

Advantages of boron containing polyethylene sheet: polyethylene is a hydrocarbon with high hydrogen content and good weakening ability for fast neutrons. Boron absorbs thermal neutrons and lead is especially effective for shielding gamma radiation. Therefore, lead boron containing polyethylene sheet has comprehensive shielding effect for shielding fast neutrons, thermal neutrons and gamma radiation. The popularization and application of boron containing polyethylene sheet helps to simplify the shielding structure and reduce the shielding cost The weight of shield reduces the volume of shield. The boron containing polyethylene sheet has good engineering performance, good dimensional stability and satisfactory gamma radiation resistance. The shielding performance of thermal neutron, fast neutron and gamma radiation is obviously better than that of polyethylene when the service temperature is 80 ~ 100 ℃. The research shows that the boron containing polyethylene sheet can effectively prevent the harm of nuclear radiation and neutron radiation to individuals and society.

含硼聚乙烯板是中国工程物理研究院开发的一类新型硬质屏蔽材料，已用于科研、核工程建设及医疗卫生部门的中子及γ射线防护
含硼聚乙烯中，主要是硼起吸收作用。硼对低能中子的反应截面比较大，在还没有发生氢的反应之前低能中子基本已被硼完全吸收，含硼聚乙烯在质量百分比为10﹪、厚度为15cm时，含硼聚乙烯对中子的防护效果已达到要求。在此基础上再增加含硼量或者厚度，中子的积分泄露量基本不发生变化。核用高分子量聚乙烯UHMWPE含硼板 ，采用热压成型工艺,制备用于中子的碳化硼/高分子量聚乙烯(UHMWPE)复合材料,含硼板将碳化硼粉搅拌在高分子聚乙烯材料当中通过高速搅拌、捏合、塑化、热压而成的，是一种新型的复合材料。