纤维布是一种核电厂大量使用的保温材料。在核电厂反应堆内,由于受到高温、中子辐照等因素的作用,材料强度会发生明显降低,以至于在使用过程中发生脱落,导致电站环境污染。为了保证核电厂的正常运行,研究其辐照耐受能力十分必要。试验中使用的纤维布其主要成分为偏硅酸盐,是一种无机非金属材料。辐照工作在49-2堆内分两次完成,辐照温度均为300℃。在第1次辐照试验中,其中子累计照射量为6 kGy,γ累计照 Fiber cloth is a large-scale use of nuclear power plant insulation materials. In the nuclear power plant reactor, due to the high temperature, the role of neutron radiation and other factors, the material strength will occur significantly reduced, so that occurred in the process of shedding, leading to environmental pollution in power stations. In order to ensure the normal operation of nuclear power plant, it is necessary to study its radiation tolerance. The main component of the fiber cloth used in the experiment is metasilicate, which is an inorganic non-metallic material. Irradiation work in the 49-2 heap completed in two, the irradiation temperature is 300 ℃. In the first irradiation test, the neutron cumulative exposure was 6 kGy, γ cumulative photos