Removal of Cesium and Separation of Strontium for the Analysis of the Leachate of Spent Fuel

사용후핵연료 침출액 분석을 위한 세슘의 제거 및 스트론튬의 분리

  • Received : 2001.08.23
  • Published : 2002.02.25

Abstract

The selective removal of cesium by ammonium molybdophosphate (AMP) was studied in order to reduce an interference by high radioactivity of cesium on the determination of low radioactive elements in leachate of spent fuel. The removal of Cs, U, Ce, La, Co Ca, Na Sr and K was investigated for the leachate and the bentonite in contact with a spent fuel. More than 90% of cesium was removed by AMP and Ca, Na, Co and Sr was remained in 0.1 M $HNO_3$. However, three valence elements such as La and Ce were also removed by AMP. Though a little of potassium of the bentonite components was adsorbed on AMP, the potassium in the bentonite solution diluted to its concentration in a real sample would not affect the capacity of AMP greatly. From another experiment for the separation of strontium as a leaching indicator of spent fuel, the recovery of strontium in 8.0 M $HNO_3$ solution by using Sr-resin (Eichrom, P/N SR-B50-A) was more than 95% by eluting with 0.05 M $HNO_3$.

Keywords

cesium;strontium;ammonium molybdophosphate;Sr-resin;bentonite

Acknowledgement

Supported by : 과학기술부

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