作 者：
戚文元;邱忠明;顾汉;何忠良;金亚放;王建勤
单 位：
上海市农业科学院作物育种栽培研究所;上海核工程研究设计院
关键词：
钴源;γ-射线;辐照防护;屏蔽;程序;安全系数;臭氧浓度
摘 要：
根据最新国际防护标准 ,采用QAD CG程序 ,对上海市农业科学院钴源室的各点屏蔽参数进行验算得出如下结论 :该钴室扩源至 3.7× 10 15Bq( 1× 10 5ci)后 ,其辐照防护安全系数在1.6～ 2 5.0之间 ,是安全的 ;最大的扩源能力为 5.55× 10 15Bq( 1.5× 10 5ci)。辐照停止后再通风10min以上 ,臭氧浓度可降至 0 .12mg/m3(符合GB30 95 1996)
译 名：
CALCULATION OF COBALT UNIT CAPACITY EXPANSION AND ITS SAFETY ASSESSMENT
作 者：
Qi Wenyuan 1) Qiu Zhongming 2) Gu Han 2) He Zhongliang 2) Jin Yafang 1) Wang Jianqin 1) ( 1) Crop Breeding and Cultivation Research Institute, Shanghai Academy of Agricultural Sciences, S
关键词：
Cobalt unit; γ ray; Radio protection; Screen; Process; Safety coefficient; Ozone concentration
摘 要：
According to the up to dated international radio protection standard and the process QAD CG, some spot screen parameters were monitored and calculated in the cobalt unit of Shanghai Academy of Agricultural Sciences. Conclusion is that its safety coefficient of the radio protection ranged from 1.6 to 25.0, when the capacity of the cobalt unit was expanded to 3.7×10 15 Bq, which is therefore safe and sound. Anyway, its maximum expansion could be 5.55×10 15 Bq. When irradiation is stopped and 10 minute ventilation provided, the ozone concentration will be down to 0.12 mg/m 3, which absolutely accords with the GB3095 1996.
