^(60)Co辐照室堆码辐照剂量不均匀度测量及分析

Measurement and analysis of dose uniformity ratio for pile up irradiation in static state in irradiation room

采用测定辐照产品箱中吸收剂量不均匀度的方法对 5种常用辐照产品的 3种辐照加工工艺质量进行了研究。结果如下 :1)上下对调并前后翻转的双面辐照工艺 ,其产品箱中的吸收剂量不均匀度 U范围为 1.36～ 1.67,在辐照加工质量控制标准 ( U<2 )以内 ,可用于生产。2 )单面辐照方式其剂量不均匀度为 2 .67,超过了质量控制标准 ,不宜采用。 3)后排单面辐照方式其剂量不均匀度 ( 2种产品 )分别为3.2 5和 3。 69,远大于 U<2的标准 ,不宜作为主要辐照方式 ,但可以作为辅助辐照方式以提高60 Co源的利用率。

The quality of three irradiation techniques for five irradiated products has been studied using the measurement of dose ununiformity in product box irradiated The results were as follows:1) The range of dose ununiformity was from 1 36 to 1 67 with changing the position from the top to the bottom and from the front to the back and it didn't exceeded the dose ununiformity limitation (U<2) This technique can been used to production 2) The dose ununiformity of single face irradiation was 2 67 It exceeded the limitation described, so which can not be used to production 3) The dose ununiformity of single face irradiation in the back rank (two products) were 3 25 and 3 69 respectively, also exceeded the limitation described and can not be used to production But it can be used as assistant irradiation method for increasing the utilization efficiency of 60 Co