METHOD OF CONTROLLING URANIUM CONTENT IN PROCESS MEDIA OF NUCLEAR POWER PLANTS Russian patent published in 2013 - IPC G21F9/12 

FIELD: physics.

SUBSTANCE: invention relates to safe operation of nuclear power plants. Content of uranium in process media of nuclear power plants is controlled as follows: collecting a sample of the process medium, alkanising said sample to pH 9-11 by adding ammonia, filtering through a cellulose acetate membrane with freshly deposited manganese dioxide, dissolving the membrane with manganese dioxide in hydrochloric acid while boiling, reducing uranium with ascorbic acid and zinc metal to oxidation state IV, and then determining content of uranium in the solution using a photometric method using arsenazo III in a chloride medium.

EFFECT: simple and faster control, lowering the uranium detection limit 40-fold.