摘要
为了测定高放废液中的^(129)I 含量本文建立了一个放射化学活化分析方法。样品在加入^(131)I 示踪剂后进行放化分离,以^(131)I 定化学收率,然后以液体形式进行中子活化。活化后加入碘载体再次进行放化分离,以 AgI 形式测量^(130)I。用^(197)Au(n,γ)^(198)Au 作为活化参考标准。在中子通量密度3×10~9cm^(-2)·s^(-1)下本方法的灵敏度达1×10^(-9)g。共分析了十二个高放废液样品。由于全部样品的^(129)I 含量都在本方法的灵敏度以下,所以只能给出^(129)I 浓度的上限值。
A radioehemical neutron activation analysis method is developed to determine ^(129)I in high level liquid waste (HLLW). The ^(129)I is radiochemically separated with the aid of ^(131)I as tracer and then sample in the liquid form was irradiated with neutron. After irradiation the ^(130)I with iodine carrier was radiochernically separated again and counted in the form of AgI. The ^(197)Au(n, γ) ^(198)Au is used as neutron activation monitor. Under neutron flux 3×10~9cm^(-2) s^(-1) the sensitivity of this method is 1×10^(-9)g. Twelve HLLW samples are analysed. Owing to the fact the ^(129)I contents are below the sensitivity of the method,the upper limit of ^(129)I concentration can only be obtained.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1992年第2期48-51,共4页
Atomic Energy Science and Technology
关键词
碘129
高放废液
活化分析
放化分离
HLLW
^(129)I
Activation analysis
Radiochemical separation
^(198)Au
