A method is suggested for calculating the density of single-component aqueous solutions of nitric acid and nitrate salts contained in solutions used in hydrometallurgical processes on the nuclear fuel cycle. The method uses apparent molar volumes and the water concentration. The method makes it possible to calculate the density of nitric acid solutions up to 17 M (HNO₃ dihydrate) and salts to the point of formation of saturated solutions with an error not exceeding 0.2%. The values of the apparent molar volumes linearly depend on the concentration of water, and the apparent molar values approximated to the infinite dilution correspond to the Pitzer values.

中文翻译：

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基于表观摩尔体积的概念的硝酸盐溶液密度数学模型的方法，应用于核燃料循环的湿法冶金过程

建议一种方法，用于计算核燃料循环中湿法冶金过程所用溶液中所含硝酸和硝酸盐的单组分水溶液的密度。该方法使用表观的摩尔体积和水浓度。该方法使得可以计算高达17M的硝酸溶液（HNO ₃二水合物）和盐的密度至饱和溶液的形成点，误差不超过0.2％。表观摩尔体积的值线性地取决于水的浓度，并且近似于无限稀释的表观摩尔值对应于Pitzer值。