A Study on the Waste Treatment from a Nuclear Fuel Powder Conversion Plant

핵연료 분말제조 공정에서 발생하는 폐액의 처리에 관한 연구

  • Jeong, Kyung-Chai (Advanced Research Groop, Korea Atomic Energy Research Institute) ;
  • Kim, Tae-Joon (Advanced Research Groop, Korea Atomic Energy Research Institute) ;
  • Choi, Jong-Hyun (Advanced Research Groop, Korea Atomic Energy Research Institute) ;
  • Park, Jin-Ho (Advanced Research Groop, Korea Atomic Energy Research Institute) ;
  • Hwang, Seong-Tae (Advanced Research Groop, Korea Atomic Energy Research Institute)
  • 정경채 (한국 원자력연구소 응용연구그룹) ;
  • 김태준 (한국 원자력연구소 응용연구그룹) ;
  • 최종현 (한국 원자력연구소 응용연구그룹) ;
  • 박진호 (한국 원자력연구소 응용연구그룹) ;
  • 황성태 (한국 원자력연구소 응용연구그룹)
  • Received : 1996.08.23
  • Accepted : 1996.09.30
  • Published : 1996.12.10

Abstract

Treating methods and characteristics of waste from a nuclear fuel powder conversion plant were studied. To recovery or treat a trace uranium in liquid waste, the ammonium uranyl carbonate(AUC) filtrate must be heated for $CO_2$ expelling, essentially. Uranium content of final treated waste solution from fuel powder processes for a heavy water reactor(HWR) could be lowered to 1 ppm by the lime treatment after the ammonium di-uranate(ADU) precipitation by simple heating. Otherwise, in case of the waste from fuel powder processes for a pressurized light water reactor(PWR), it is result in 0.8 ppm as a form of uranium peroxide such as $UO_4{\cdot}2NH_4F$ compounds. Optimum condition was found at $101^{\circ}C$ by the simple heating method in case of HWR powder process waste. And in case of PWR powder process waste, optimum condition could be obtained by precipitating with adding hydrogen peroxide and adjusting at pH 9.5 with ammonia gas at $60^{\circ}C$ after heating the waste In order to expelling $CO_2$. As the characteristics of recovered uranium compounds, median particle size of ADU was increased with pH increasing in case of HWP waste. Also, in case of uranium proxide compound recovered from PWR waste, the property of $U_3O_8$ power obtained after thermal treatment in air atmosphere was similar to that of the powder prepared from AUC conversion plant.

Keywords

References

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