Behavior and removal of the Iodine in reprocessing of spent fuel

Iodine is one of the important fission products of spent fuel in nuclear power reactors. Considering that ¹²⁹I can cause the deterioration of the solvent, the generation of organic iodine and the radioactivity overdose in the tail of uranium and plutonium products, so while reprocessing of spent fuel after several years cooling, ¹²⁹I should be driven off before solvent extraction in order to avoid it enter the subsequent extraction process. ¹²⁹I is driven into the exhaust gas, then is trapped by filter. This article collects the content of iodine in power reactor spent fuel, gas-liquid two phase distribution of iodine and summarizes the trend and handling method in reprocessing plants. (authors)