核化学与放射化学2026，Vol.48Issue(2)：113-129,17.DOI:10.7538/hhx.2026.48.02.0113
深地质处置近场围岩蚀变对核素迁移影响的长期效应
Long-Term Effects of Near-Field Host Rock Alteration on Radionuclide Migration in Deep Geological Disposal
摘要
Abstract
The safe disposal of high-level radioactive waste(HLW)is a critical challenge for the sustainable development of nuclear energy globally.Deep geological disposal,internationally recognized as a viable solution,aims to isolate HLW over long timescales(up to millions of years)through a multi-barrier system.This paper focuses on the long-term alteration of the host rock in the near-field of a deep geological repository and its prolonged impact on the geochemical environment and radionuclide migration behavior.After repository closure,the surrounding granite will undergo continuous alteration due to combined effects of decay heat,groundwater-rock interaction,ionizing radiation,and microbial activity.These alteration processes may modify the physical properties of the rock mass(e.g.,pore structure,permeability,and fracture connectivity),potentially reshaping groundwater flow paths and radionuclide transport routes.Simultaneously,the dissolution of primary minerals and precipitation of secondary phases can alter the chemical conditions of the near-field groundwater.Furthermore,rock alteration may change mineral surface properties such as sorption sites,surface charge,and reactivity,and promote the generation and long-term evolution of colloids.These physicochemical changes complicate radionuclide migration,affecting diffusion and advection mechanisms within altered fracture networks and the rock matrix.From the perspective of long-term host rock alteration,this study investigates the migration,transformation,and fate of radionuclides following the closure of a deep geological repository.关键词
高放废物/深地质处置/围岩蚀变/花岗岩/黏土岩/核素迁移Key words
high-level radioactive waste(HLW)/deep geological disposal/host rock alteration/granite/claystone/radionuclide migration分类
能源科技引用本文复制引用
吴涵玉,王明炜,文鑫,康明亮,陈媛,范桥辉..深地质处置近场围岩蚀变对核素迁移影响的长期效应[J].核化学与放射化学,2026,48(2):113-129,17.基金项目
甘肃省油气资源研究重点实验室开放课题基金(SZDKFJJ2022003) （SZDKFJJ2022003）
自然资源部黄河上游战略性矿产资源重点实验室开放课题资助项目(No.YSMRKF202211) （No.YSMRKF202211）
