• Title/Summary/Keyword: 방사성폐기물 유리화

Search Result 75, Processing Time 0.021 seconds

Determination of major and minor elements in low and medium level radioactive wastes using closed-vessel microwave acid digestion (밀폐형 극초단파 산분해법을 이용한 중${\cdot}$저준위 방사성폐기물의 성분 원소 분석)

  • Lee Jeong-Jin;Pyo Hyung-Yeal;Jeon Jong-Seon;Lee Chang-Heon;Jee Kwang-Yong;Ji Pyung-Kook
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
    • /
    • v.2 no.4
    • /
    • pp.231-238
    • /
    • 2004

  • The conditions are obtained for the decomposition of solid radioactive wastes, including ion exchange resin, zeolite, charcoal, and sludge from nuclear power plant. In the process of decomposing the radioactive wastes was used the microwave acid digestion method with mixed acid. The solution after acid digestion by the following method was colorless and transparent. Each solution was analyzed with ICP-AES and AAS and the recovery yield for 5 different elements added into the simulated radioactive wastes were over $94{\%}$. The elemental analysis of destructive low and medium level radioactive wastes by the proposed microwave acid digestion conditions concerning the chemical characteristics of each radioactive waste are expected to be useful basic data for development of optimal glass formulation.

  • PDF

Study on Pre-treatment Method for Vitrification of Concentrated Wastes (농축폐기물 유리화를 위한 전처리 방안 연구)

  • Cho, Hyun-Je;Kim, Deuk-Man;Park, Jong-Kil
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
    • /
    • v.8 no.3
    • /
    • pp.221-227
    • /
    • 2010

  • The solidification methods for powder wastes dried at CWDS(Concentrate Waste Drying System) in PWR have been studied in a variety of ways both at home and abroad. The solidification for these wastes has been performed using stabilization agents such as cement, paraffin and polymer. The applicability studies to maximize the reduction ratio of wastes and operational effectiveness for wastes treatment have been carried out, recently. It is necessary to pretreat the powder wastes before feeding wastes to vitrification facility because the fines flying brings about clogging of feeding pipes and off-gas treatment system or workers' exposure to radiation during maintenance. This paper describes an effective method for treatment of powder wastes to improve safety and stability of vitrification facilities.

  • PDF KSCI