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本文叙述了用擦拭法监测氚的表面污染的方法。实验表明Φпп-15滤布能溶解于二氧六环溶剂中,是一种较合适的擦拭材料。用甘油-乙醇(体积比为10-25%)溶液浸渍过的Φпп-15滤布,擦拭不锈钢片和铝片等非渗透性氚表面污染样品,其平均擦拭效率为11.5%;擦拭涂在混凝土块表面的环氧改性巨氨脂漆层,其平均擦拭效率为8.4%;擦拭塑料等渗透性氚表面污染样品,其平均擦拭效率为5.0%。当擦拭后8小时内进行测量时,一般可以不考虑氚的逃逸问题。由于擦拭法的影响因素较多,因此误差较大。
This article describes a method for monitoring surface contamination of tritium with a wipe method. Experiments show that Φпп-15 filter cloth can be dissolved in dioxane solvent, is a more appropriate wipe material. With a glycerol-ethanol (volume ratio of 10-25%) solution impregnated Φпп-15 filter cloth, wipe stainless steel and aluminum sheet and other non-penetrating tritiated surface contamination samples, the average wipe efficiency of 11.5%; wipe coated concrete Epoxy modified macroreticular paint on the surface of the block, the average wipe efficiency of 8.4%; wipe the surface of plastic tritium permeability and other samples, the average wipe efficiency of 5.0%. When wiping within 8 hours after the measurement, the general can not consider the issue of tritium escape. Due to the impact of wiping more factors, so the error is larger.