کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9793717 1514277 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fundamental study of polonium contamination by neutron irradiated lead-bismuth eutectic
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
Fundamental study of polonium contamination by neutron irradiated lead-bismuth eutectic
چکیده انگلیسی
As a fundamental study of polonium contamination by neutron irradiated LBE, it was investigated to remove polonium surface contamination by baking method. The baking experiments were performed using quartz glass plates contaminated by material evaporated from neutron irradiated LBE liquid. The contaminated quartz glass plates were baked in vacuum (2 Pa) at various temperatures. The experimental results clearly show that polonium evaporated from LBE can be removed by baking samples at temperatures 300 °C and above. It is of note that the decrease in the weight of deposited materials baked at 300 °C differed from that observed at 400 °C or higher temperatures. At temperature of 300 °C, no change in weight was observed. The mass of polonium in the LBE samples was so small that no weight change could be observed by release of polonium. Thus, it might show that only the polonium among the adherent materials was removed by baking at 300 °C without removing other adhered material. The method is rather simple, so it is easy to apply the method for practical application. One of the expected applications may be the removal of polonium contamination in a primary loop before maintenance work of the loop. Also it shows that this method can be used to avoid the release of polonium from contaminated material, in case of an accident, by keeping the contaminated material at low temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 343, Issues 1–3, 1 August 2005, Pages 297-301
نویسندگان
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