摘要
本文主要介绍“我国南方使用了 3 6年的某废物填埋坑的放射性核素在土壤中的迁移行为研究”。结果表明 :(1 )填埋坑壁和坑底对防止放射性核素废液的渗透具有很好的阻隔能力 ;(2 )核素2 2 6 Ra与2 32 Th在土壤中具有几乎相同的迁移特点 ;(3 )核素137Cs在土壤中的迁移速度约为 1 .0～ 2 .6cm/a;(4 )用半无限沙柱中瞬时投源的溶质运移模型和简单求和法估算当年137Cs的填埋活度大致相符 ,且与分析的当年可能的情况吻合。
The migration of radionuclides in soil under the natural conditions was researched. The results show that: (1) the wall of the waste disposition pit has a good capacity to stop leaking of the radioactive liquid; (2) 226 Ra and 232 Th have almost the same characteristic when they migrate with water through soil; (3) the migration velocity of 137 Cs in soil is about 1.0～2.6 cm/a under the natural conditions; (4) The results estimated by the model of one time liquid sources dropping in the semi infinite length sand column coincide with that by the simplified summing method and both are in agreement with the facts that happened 36 years ago.
出处
《辐射防护》
CAS
CSCD
北大核心
2003年第6期321-327,336,共8页
Radiation Protection
关键词
放射性核素
土壤
中国
废物处置
Natural radionuclide,137 Cs,Migration Velocity,Migration Module,Waste Pit,Soil Column
