방사성폐기물학회지 (Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT))
- 제5권1호
- /
- Pages.79-84
- /
- 2007
- /
- 1738-1894(pISSN)
- /
- 2288-5471(eISSN)
국내 PWR 사용후핵연료에서 세슘, 스트론튬과 요오드의 갭 및 입계 재고량 측정
Measurement of the Gap and Grain Boundary Inventories of Cs, Sr in and I in Domestic Used PWR Fuels
-
김승수
(한국원자력연구소) ;
- 강광철 (충북대학교 화학과) ;
-
최종원
(한국원자력연구소) ;
-
서항석
(한국원자력연구소) ;
- 권수한 (충북대학교 화학과) ;
-
조원진
(한국원자력연구소)
-
Kim, S.S.
(Korea Atomic Energy Research Institute) ;
- Kang, K.C. (Department of Chemistry, Chungbuk National University) ;
-
Choi, J.W.
(Korea Atomic Energy Research Institute) ;
-
Seo, H.S.
(Korea Atomic Energy Research Institute) ;
- Kwon, S.H. (Department of Chemistry, Chungbuk national Unviersity) ;
-
Cho, W.J.
(Korea Atomic Energy Research Institute)
- 발행 : 2007.03.30
초록
처분장에서 지하수로 쉽게 유출될 수 있는 방사성 핵종들의 양을 예측하기 위하여 국내 PWR 사용후핵연료 팰렛들의 갭(gap) 및 입계에 있는 용해성 원소들의 재고량을 측정하였다. 연소도가
Inventories of soluble elements in the gap and grain boundaries of domestic used PWR fuel pellets were measured to estimate the quantities of radionuclides that are liable to be rapidly released into the groundwater of a disposal site. The gap inventory of cesium for the pellets in the used fuel with a burn-up range of 45 to 66 GWD/MTU showed 0.85 to 1.7% of its total inventory, which was close to 1/6 to 1/3 of the fission gas release fraction (FGRF). However, the amounts of cesium released from the gaps of the pellets below 40 GWD/MTU of a burn-up and less than 1% FGRF were so erratic that the gap inventory could not be defined by ie FGRF. Strontium inventories in the gap and grain boundaries of the pellets in the same rod were not significantly varied, and the iodine inventory in the gap of the used PWR fuels was estimated to be less than or the same as the FGRF.