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试验在反应堆孔道内进行。所达到的最高累积辐照水平为热中子1.6×10~(20)n/cm~2,快中子(能量≥1 MeV)3.8×10~(19)n/cm~2,γ剂量1.1×10~(11)R。电缆在堆内辐照时的温度一般在550℃以上。试验结果表明电缆性能良好。得到的主要结论有:(1)电缆绝缘电阻受温度影响,与堆功率有关,在一定范围内与辐照积分通量关系不大;(2) 中子与γ射线在电缆上引起感应电流,其大小与堆功率成正比,在一定范围内与辐照积分通量无关,γ射线对感应电流有较大影响;(3)电缆辐照后的机械性能良好。
The test is conducted in the reactor tunnel. The maximum cumulative irradiance reached 3.8 × 10 ~ (19) n / cm ~ 2 for thermal neutron 1.6 × 10 ~ (20) n / cm ~ 2 and fast neutron (energy≥1 MeV) × 10 ~ (11) R. The temperature of the cable when irradiated in the reactor is generally above 550 ℃. The test results show that the cable performance is good. The main conclusions obtained are as follows: (1) The insulation resistance of the cable is affected by the temperature, which is related to the reactor power and has little to do with the radiation integral flux within a certain range. (2) The induced current of the neutron and γ- Its size is proportional to the stack power, and has nothing to do with the radiation integral flux in a certain range. The γ-ray has a great influence on the induced current. (3) The mechanical properties of the cable after irradiation are good.