ISO 21483:2013 specifies an analytical method for determining the solubility in nitric acid of plutonium in pellets of unirradiated mixed oxide fuel (light-water reactor fuels). The results provide information about the expected dissolution behaviour of irradiated pellets under industrial reprocessing conditions. In this aspect, the specific conditions (e.g. time of the test) may vary depending upon the need to match to a specific reprocessor's requirements. The test is aimed at determining solubility under equilibrium conditions rather than the kinetics of dissolution and hence allows for a second dissolution period.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
1 Scope
2 Principle
3 Interferences
4 Reagents
4.1 Concentrated nitric acid
4.2 Nitric acid high
4.3 Nitric acid low
4.4 Concentrated hydrofluoric acid
4.5 Mixture of acid
4.6 Sodium hydroxide
5 Apparatus
5.1 Analytical balance
5.2 Dissolution apparatus with total reflux condenser
5.3 Dissolution apparatus without total reflux condenser
5.4 Second dissolution apparatus (polytetrafluoroethylene, PTFE, high density polyethylene, HDPE)