Taking into account the temperature effect in nitrate solutions: validation of the Pitzer and 'ISOTEMP' density laws to be implemented in the Latec workbench - 14343

For many years, various methodologies have been investigated by IRSN to calculate nitrate solutions densities. No later than 2002, a new method to calculate nitrate densities supported by theoretical concepts, called' isopiestic' method, was proposed. This method, however, limits the calculation of the bulk density of solutions to 25 deg. C due to the lack of measurements at other temperatures. The objective of the paper is to continue the work initiated in 2002 by accounting for the dilation of the temperature effect, building a 'modified isopiestic law' and also implementing the Pitzer methodology. A comparison with other available density laws such as the Kumar and Sakurai laws is then necessary to validate the implementation. (authors)