METHOD OF HIGH SENSITIVE REAL TIME MONITORING OF LONG-LIFE GLOBAL RADIONUCLIDE C IN THE GAS PHASE OF TECHNOLOGICAL PROCESSING OF SPENT NUCLEAR FUEL Russian patent published in 2015 - IPC G01N21/3504 

FIELD: measurement equipment.

SUBSTANCE: method consists in measurement of coefficient of absorption of infrared radiation the analysed mix of gases containing ¹⁴CO₂ or ¹⁴CO passed through single-pass or multipass to a ditch, thus measurement of coefficient of absorption of radiation is taken in the range of lengths of waves from 1.94 to 2.18 microns, or from 2.50 to 2.80 microns, or from 4.00 to 4.50 microns, or from 14.00 to 17.00 microns for molecules ¹⁴CO₂, and in the range of lengths of waves from 2.30 to 2.50 microns or from 4.50 to 5.10 microns for molecules ¹⁴CO. The selection of the named ranges, the spectral accuracy and ditche type is caused by presence of other main gas components, formed during processing of spent nuclear fuel, and also by the concentration of the molecules ¹⁴CO₂ or ¹⁴CO and the value of the common pressure in the ditch.

EFFECT: higher accuracy.

8 cl, 5 dwg