非放射性甲基碘示踪法测量碘吸附器效率实验

Experimental exploration for measuring iodine adsorber efficiency by non-radioactive methyl iodine tracer

研究了碘吸附器效率测试过程中甲基碘在供料和洗脱阶段的吸附和脱附行为,为采用非放射性甲基碘进行效率测试取样时间的确定提供了依据。同时研究了采用非放射性碘甲烷和放射性碘甲烷对碘吸附器进行效率检测时的异同,分别考察了存在机械泄漏和浸渍剂部分损失两种条件下用不同示踪剂所测结果,并对存在的异同进行了理论分析。结果表明,当碘吸附器机械泄漏占主导时,两种试剂所测结果具有较好的一致性,且泄漏面积越大,一致性越好;当碘吸附器机械泄漏率可以忽略时,两种试剂测量结果存在较大偏差。

The adsorption and desorption behaviors of methyl iodine in the feeding and elution stages of iodine absorber efficiency test is studied,which provides a basis for determining the sampling time in efficiency test with non-radioactive methyl iodine.The differences and similarities in using non-radioactive methane iodide and radioactive methane iodide to test the efficiency of iodine sorbent are studied.The results from using different tracers under mechanical leakage and partial loss of impregnating agent are investigated respectively,and the differences and similarities are analyzed through theoretical analysis.It is shown that the results by two reagents have a good consistency when the mechanical leakage of iodine adsorber is dominant.The greater the leakage area,the better the consistency.When the mechanical leakage rate of iodine sorbent can be ignored,there is a large deviation in the measurement results by two reagents.