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題 名 | Absolute Thermal and Epithermal Neutron Flux Distributions in the Four Vertical Wet Channels for Isotope Production at the ET-RR-1 Reactor=ET-RR-1反應器中用來生產同位素的四個垂直水送管路之絕對熱中子與超熱中子通量分布 |
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作 者 | Eissa,E. A.; Rofail,N. B.; El-Khayat,A.; Ashmawy,L. S.; Hassan,A. M.; | 書刊名 | 核子科學 |
卷 期 | 36:5 1999.10[民88.10] |
頁 次 | 頁337-342 |
分類號 | 449.2 |
關鍵詞 | ET-RR-1反應器; 同位素; 垂直水送管路; 絕對熱中子; 超熱中子通量; Flux; Distribution; Burn-up; |
語 文 | 英文(English) |
英文摘要 | Sixteen sets of bare and cadmium covered thin gold foils were simultaneously irradiated, for an hour at a reactor power of 2 MW, along the axes of the four vertical tangential wet channels at the core periphery of the First Egyptian Research Reactor (ET-RR-I). These locations are mainly used for radioisotope production and neutron activation analysis experiments. The γ -ray spectrum of each of the 32 irradiated gold foils was measured by means of a (HPGe) detection system. Its absolute full-energy peak (FEP) efficiency for the 411.8 keV γ -ray line of □ Au was precisely determined by means of a multi γ -ray standard source. The cadmium difference method was used in evaluating the absolute thermal neutron activation A Fortran computer program was designed on the TANDY 3000 NL PCA for calculating the absolute activities of these gold foils as well as the absolute thermal and epithermal neutron flux values. A set of curves in which the distribution of the absolute thermal and epithermal neutron flux in each channel are shown. In spite of the symmetry of these channels with respect to the core, the distributions were not identical. A comparison with a previous measurement performed in year 1962 is given. |
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