Christophe Gueibe, Jos Rutten, Johan Camps, Klaas van der Meer … · 2015-10-09 · Christophe Gueibe, Jos Rutten, Johan Camps, Klaas van der Meer Belgian Nuclear Research Centre
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l Objective of the International Monitoring System (IMS): At least 90% detection capability within 14 days after a nuclear explosion in the atmosphere, underwater or underground for a 1 kton nuclear explosion.
l Radioxenons are a key component of the verification of the CTBT
l Detection capability international noble gas network (Xe) depends on: l Number and distribution of stations (30 operational actually, 40 are planned) l Minimum Detectable Concentration (< 1mBq/m3 for Xe-133) l Background level at individual stations of radioxenons from other sources
Source Radioxenon release Hospitals ≥ 5 1010 Bq/year Be and mainly Xe-131m Nuclear Power Plants ~1015 Bq/year > 150 sites (> 1000 MW) Radiopharmaceutical facilities ~0.5 – 1 1016 Bq/year All RPFs 1 kton nuclear explosion ~1016 Bq/event Xe-133 if all released
l Ag-ETS-10 highly concentrates xenon l Radioxenon with high activities in operational conditions at IRE! l Degradation of materials due to the irradiation?
l No degradation after a 1 MGy irradiation l Temperature rise in the adsorption column?
l Decreasing adsorption capacity and increasing diffusion l Calculation of the temperature inside the column (T > 200 °C)
l Possible solutions l Mixture Ag-ETS-10 with activated carbon to increase volume l Ag-Chabazite to increase volume of trap l Replacing 1 column by 2 or 4 smaller column (Vtot=Cst) l Oversize the adsorption column for equilibrium è T ↓
l AND decrease activity by adapting the working process
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