摘要
从野外试验场用专门研制的原状土柱采样装置采得未扰动土柱 ,以60 Co、85Sr和 13 7Cs三种核素为示踪剂 ,在人工喷淋条件下研究核素在土柱中的迁移行为。采用直接测量和解体测量两种方法测定了核素在土柱中的垂向浓度分布。实验结果表明 ,在日均喷淋强度为 7.96 mm/d的喷淋条件下 ,近一年时间内 85Sr浓度峰在实验土柱中的下移距离 ,按直接测量和解体测量分别约为 6 .0和 8.0 cm;60 Co和 13 7Cs浓度峰基本仍在原位。
An undisturbed soil column was collected from the CIRP's Field Test Site with a specific device. 60 Co, 85 Sr and 137 Cs were used as the tracing nuclides and their migration behavior was studied under artificial sprinkling condition. The concentration distribution of nuclides along the vertical direction of the soil column was detected with two methods, destructive and non destructive measurement. Basically, the results obtained from the two methods are in agreement each other. In one year, the concentration peak of 85 Sr in the column moved down 6.0 cm but those for 60 Co and 137 Cs remained at original position. The above results agree with those from the test at the field test site. (
出处
《辐射防护》
CAS
CSCD
北大核心
2000年第1期36-42,共7页
Radiation Protection
