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국내 KBS-3 방식 고준위방사성폐기물 심층처분시설 방사선학적 안전성 평가 대상 방사성핵종 목록 선정개념(안) 제언

Suggestion on Screening Concept of Radionuclides to be Considered for the Radiological Safety Assessment of the Domestic KBS-3 Type Geological Disposal Facility of High-level Radioactive Waste(HLW)

  • 투고 : 2023.02.17
  • 심사 : 2023.03.08
  • 발행 : 2023.03.31

초록

The transport calculation for a wide variety of radionuclides contained in high-level radioactive waste, especially spent nuclear fuel, is computationally difficult, and input data collection for this also take a considerable amount of time. Accordingly, considering limited resources, it is possible to reduce the calculation time while minimizing impact on accuracy by including only radionuclides important to calculation result through applying some criteria among potential radiation source terms that may release into environment. In this paper, therefore, we reviewed and analyzed the screening process performed to select radionuclides to be considered in the safety assessment for the KBS-3 type repository in Sweden and Finland. In both countries, it was confirmed that a list of radionuclides was selected by comprehensively considering screening criteria such as radioactivity inventory, half-life, radiotoxicity, risk quotient, and transport properties, and etc. A comparison of radionuclides included in the radiological safety assessment in both countries suggests that most of nuclides are considered in common, and a few nuclides considered only in one country are due to differences in decay chain treatment or spent fuel types. As of now, since most of information on the disposal facility in Korea has not been determined, it is necessary to comprehensively model release and transport of all radionuclides considered in Sweden and Finland when performing the radiological safety assessment. Based on these results, we derived the screening concept of selecting a list of radionuclides to be considered in the radiological safety assessment for the domestic KBS-3 type geological disposal facility, and this result is expected to be used as technical basis for confirming conformity with the safety objective. In a more detailed evaluation reflecting domestic characteristics in the future, it would be desirable to consider only radionuclides selected in accordance with the screening procedure. However, further research should be conducted to determine the quantitative limit for each criteria.

키워드

과제정보

이 논문은 2021년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원을 받아 수행된 연구임(2021171020001A, 사용후핵연료 관리시설 설계기술개발).

참고문헌

  1. Nuclear Safety and Security Commission. 2021. Enforcement Decree Of The Nuclear Safety Act. Presidential Decree No. 31824.
  2. Nuclear Safety and Security Commission. 2019. Standards for Radiation Protection, and etc. Notice No. 2019-10.
  3. Ministry of Trade, Industry and Energy. 2017. Radioactive Waste Management Act. Act No. 15082.
  4. Ministry of Trade, Industry and Energy. 2021. The Second Basic Plan for the Management of High-Level Radioactive Waste (Draft).
  5. Nuclear Safety and Security Commission. 2021. General Standards for Geological Disposal Facility of High-level Radioactive Waste. Notice No. 2021-21.
  6. SKB (Svensk Karnbranslehantering AB). 2010. Radionuclide Transport Report for the Safety Assessment SR-Site. SKB TR-10-50.
  7. Rune Hakansson. 2000. Berakning av nuklidinnehall, resteffekt, aktivitet samt doshastighet for utbrant karnbransle (Swedish version). SKB Rapport R-99-74.
  8. European Union. 1996. Council Directive 96/92/EURATOM of 13 May 1996 Laying Down Basic Safety Standards for the Protection of the Health of Workers and the General Public against the Dangers Arising from Ionizing Radiation. Luxembourg: European Commission.
  9. Posiva Oy. 2012. Safety Case for the Disposal of Spent Nuclear Fuel at Olkiluoto - Assessment of Radionuclide Release Scenarios for the Repository System 2012. POSIVA 2012-09.
  10. Posiva Oy. 2013. Safety Case for the Disposal of Spent Nuclear Fuel at Olkiluoto - Models and Data for the Repository System 2012. POSIVA 2013-01.
  11. STUK(Radiation and Nuclear Safety Authority). 2018. Disposal of Nuclear Waste. GUIDE YVL D.5.
  12. Nuclear Energy Agency. 2011. Spent Nuclear Fuel Assay Data for Isotopic Validation: State-of-the-Art Report. NEA/NSC/WPNCS/DOC(2011)5.