放射性ヨウ素吸着剤AgRとAgXについて

抄録

Rasa-AgX as an adsorbent of radioactive organic iodine has been commercialized and is being used in filtered venting system at Japanese nuclear power plants (NPPs) as their countermeasures of severe accidents. However, as the venting conditions vary in different NPPs, the adsorbents with matched characteristics are demanded. For this reason, a new radioiodine adsorbent, AgR, has been developed. Although the Ag content is as low as 10%, AgR still shows the adsorption efficiency of 99.5% even if dew point distance (DPD) is 0K (Residence time is 0.24 sec.). Furthermore, since AgR exhibits a weak reactivity with hydrogen, it can work very well in the atmosphere with the concentration of 10% hydrogen. In addition, AgX shows excellent long-term storage stability and water resistance under high humidity.