Sensitivity of reactor multiplication factor to positions of cross-section resonances

V. Gopalakrishnan, K. R. Vijayaraghavan

Research output: Contribution to journalArticle

Abstract

Neutron-nuclear interaction cross-section is sensitive to neutron kinetic energy and most nuclei exhibit resonance behaviour at specific energies within the resonance energy range, spanning from a fraction of an electron volt to several tens or hundreds of kilo electron volts. The energy positions of these resonances correspond to the excitation energy levels of the compound nucleus that are formed as intermediate states during the interaction. Though these positions, thanks to sophistication in science and technology, are known reasonably precisely for the materials of reactor interest, deviations or spread in this data among different evaluations cannot be ruled out. In this work, the effect of such a spread in the resonance positions of the reactor materials on the multiplication factor of an infinite reactor, is obtained. The study shows that the effect on a thermal reactor is more pronounced than on a fast reactor.

Original languageEnglish
Article number39
JournalPramana - Journal of Physics
Volume89
Issue number3
DOIs
Publication statusPublished - 01-01-2017

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multiplication
reactors
sensitivity
cross sections
thermal reactors
reactor materials
neutrons
nuclei
nuclear interactions
energy
electrons
kinetic energy
energy levels
deviation
evaluation
excitation
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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abstract = "Neutron-nuclear interaction cross-section is sensitive to neutron kinetic energy and most nuclei exhibit resonance behaviour at specific energies within the resonance energy range, spanning from a fraction of an electron volt to several tens or hundreds of kilo electron volts. The energy positions of these resonances correspond to the excitation energy levels of the compound nucleus that are formed as intermediate states during the interaction. Though these positions, thanks to sophistication in science and technology, are known reasonably precisely for the materials of reactor interest, deviations or spread in this data among different evaluations cannot be ruled out. In this work, the effect of such a spread in the resonance positions of the reactor materials on the multiplication factor of an infinite reactor, is obtained. The study shows that the effect on a thermal reactor is more pronounced than on a fast reactor.",
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Sensitivity of reactor multiplication factor to positions of cross-section resonances. / Gopalakrishnan, V.; Vijayaraghavan, K. R.

In: Pramana - Journal of Physics, Vol. 89, No. 3, 39, 01.01.2017.

Research output: Contribution to journalArticle

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