Speaker
Description
A comprehensive radiation assessment and possible long-term predictive estimates of the radiation situation at places of long-term storage require oversight of radioactive gas emanation. For which reason, it is necessary to develop and implement respective recommendations for research and future oversight of the content of radioactive gases in air of SNF storage areas. Experimental research was undertaken to fulfil the task that was set during IVG.1.M physical start-ups. Air was sampled from the conduit of reactor ventilation system using two devices: "Purga" cryogenic device and "OS1700" tritium manifold. Air sampled collected by "Purga" were measured with a gamma-spectrometer having a GC-1518 coaxial germanium detector. Air samples collected with the tritium manifold were analyzed with a "SL-300" beta-spectrometer. Experimental studies conducted registered the major radioactive gases: 41Ar 30 to 4,500 Bq/m3, for 85Kr up to 280 Bq/m3, for 87Kr up to 720 Bq/m3, for 88Kr up to 840 Bq/m3, for 135Xe up to 140 Bq/m3, for НТО up to 20 Bq/m3 and for Тgas up to 3 Bq/m3. Experimental studies undertaken have shown applicability in principle to use sampling and analytical equipment for assessing radioactive gases emanated in a SNF storage area at BN-350.
