Analyses of Two Deep-Geological-Disposal Concepts for CANDU Spent Nuclear Fuels Using Storage Baskets

• 발행기관: 한국방사성폐기물학회
• 저자명: Jongyoul Lee Heuijoo Choi Changsoo Lee Jung-Woo Kim Sunghoon Ji Dongkeun Cho
• 간행물 정보: 『Journal of Nuclear Fuel Cycle and Waste Technology (JNFCWT)』Vol.22 No.3, 347~362쪽, 전체 16쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2024.09.30

국문 초록

In Korea, two types of spent nuclear fuels (SNFs) are generated, pressurized light water reactor type (PWR) and pressurized heavy water reactor type (PHWR; CANDU), that differ greatly in size, decay heat, and radioactive characteristics. Technology development for the disposal of SNFs has mainly focused on PWR SNFs that are large in size and have extremely high decay heat and radioactivity. However, CANDU SNFs should be considered differently from PWR SNFs in deep geological disposal systems because their characteristics significantly differ from those of PWR SNFs in terms of their dimensions, number of SNF bundles, and handling systems in nuclear power plant sites. In this paper, after reviewing the status of the CANDU SNF disposal concept by Canada and Korea, concepts related to the direct geological disposal of CANDU SNFs were described, and two concepts were proposed based on the results of the development. The engineered barrier systems developed using these two concepts were comparatively analyzed in terms of disposal safety, disposal efficiency, and technical maturity. Based on the results of the comparative analyses, a vertical-type emplacement disposal concept was determined as a reference concept for the deep geological disposal of CANDU SNFs.

키워드

Spent nuclear fuels CANDU bundles Geological disposal concept Engineered barrier system Vertical emplacement Horizontal emplacement Reference disposal concept