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对民用动力堆元件进行了批式溶解的硝酸浓度和温度的条件实验,并以模拟连续投料 方式进行了溶解温度、元件投入速度和可溶中子毒物对溶解影响的实验。结果表明,增加硝酸浓度和提高溶解温度均能加快二氧化铀的溶解速度。模拟连续投料的非沸腾溶解能使溶解过程和溶解尾气流量平稳,无气峰出现。溶解尾气量随投料量增加而增大,钆在硝酸中的浓度直到3g/L对溶解没有影响。计算了各次实验的溶解尾气量。
The experiment of batch dissolving nitric acid concentration and temperature was carried out on the components of civil power reactor, and the effects of dissolution temperature, component injection speed and soluble neutron poison on dissolution were simulated by continuous feeding. The results show that both the increase of nitric acid concentration and the increase of dissolution temperature can accelerate the dissolution rate of uranium dioxide. Simulated continuous feeding of non-boiling dissolution of the dissolution process and dissolved tail gas flow smoothly, no peak appears. The amount of dissolved tail gas increased with the amount of feed increased, the concentration of gadolinium in nitric acid until 3g / L had no effect on dissolution. Calculated the amount of dissolved gas in each experiment.