Fast neutron spectrum unfolding of a TRIGA Mark II reactor and measurement of spectrum-averaged cross sections: integral tests of differential cross sections of neutron threshold reactions
-
M. S. Uddin
,
S. Sudár
Summary
The spectrum of fast neutrons having energies from 0.5 to 20 MeV in the core of the 3MW TRIGA Mark II reactor at Savar, Dhaka, Bangladesh, was unfolded by activating several metal foils to induce threshold nuclear reactions covering the whole spectrum, and then doing necessary iterative calculations utilizing the activation results and the code SULSA. The analysed shape of the spectrum in the TRIGA core was found to be similar to that of the pure 235U-fission spectrum, except for the energies between 0.5 and 1.5 MeV, where it was slightly higher than the fission spectrum. Spectrum-averaged cross sections were determined by integral measurements. The integral values measured in this work were compared with the recommended values for a pure fission spectrum as well as with the integrated data deduced from measured and evaluated excitation functions of a few reactions given in some data files. The good agreement between integral measurements and integrated data in case of well-investigated reactions shows that the fast neutron field at the TRIGA Mark II reactor can be used for validation of evaluated data of neutron threshold reactions.
© 2013 Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München
Articles in the same Issue
- Inhalt
- Cross-sections of 45Sc(n, 2n)44m,gSc reaction from the reaction threshold to 20 MeV
- Fast neutron spectrum unfolding of a TRIGA Mark II reactor and measurement of spectrum-averaged cross sections: integral tests of differential cross sections of neutron threshold reactions
- Determination of 234U and 238U in seawater samples by alpha spectrometry after concentration of U(VI) onto hydrotalcite and co-precipitation with LaF3
- Substitution of IO3 −, IO4−, SeO3 2−, and SeO42− for CO32− in Na4[UO2(CO3)3]
- Structure and spectroscopy of uranyl salicylaldiminate complexes
- A comparison between the chemical behaviour of lead-gold and lead-bismuth eutectics towards 316L stainless steel
- Effect of temperature on the solubility and solid phase stability of zirconium hydroxide
- Purification of selenium from thorium, uranium, radium, actinium and potassium impurities for low background measurements
- Analysis of long-lived radionuclides produced by proton irradiation in lead targets – γ -measurements
- Feasibility studies for production of 89Sr in the Fast Breeder Test Reactor (FBTR)
- Synthesis of I-131 labelled iodine species relevant during severe nuclear accidents in light water reactors
Articles in the same Issue
- Inhalt
- Cross-sections of 45Sc(n, 2n)44m,gSc reaction from the reaction threshold to 20 MeV
- Fast neutron spectrum unfolding of a TRIGA Mark II reactor and measurement of spectrum-averaged cross sections: integral tests of differential cross sections of neutron threshold reactions
- Determination of 234U and 238U in seawater samples by alpha spectrometry after concentration of U(VI) onto hydrotalcite and co-precipitation with LaF3
- Substitution of IO3 −, IO4−, SeO3 2−, and SeO42− for CO32− in Na4[UO2(CO3)3]
- Structure and spectroscopy of uranyl salicylaldiminate complexes
- A comparison between the chemical behaviour of lead-gold and lead-bismuth eutectics towards 316L stainless steel
- Effect of temperature on the solubility and solid phase stability of zirconium hydroxide
- Purification of selenium from thorium, uranium, radium, actinium and potassium impurities for low background measurements
- Analysis of long-lived radionuclides produced by proton irradiation in lead targets – γ -measurements
- Feasibility studies for production of 89Sr in the Fast Breeder Test Reactor (FBTR)
- Synthesis of I-131 labelled iodine species relevant during severe nuclear accidents in light water reactors
