A dissertation submitted to the Faculty of Science, University of the Witwatersrand, in fulfilment of the requirements for the degree of Master of Science, Johannesburg 2018 / The calculation of reactor-specific fission Q-values is important for the safety analyses of nuclear reactors. The recoverable energy from the fission Q-value is used to normalise reactor quantities to the total power of the reactor. In this work, a detailed recoverable energy from fission Q-value and spatial heat deposition calculations are presented for the SAFARI-1 nuclear reactor. The fission Q-value is composed of the energy released in a fission event by fission products, neutrons, prompt and delayed gamma rays, beta particles and neutrinos. The energy released by neutrinos is not recoverable; however, part of it is recovered by the gamma and beta radiation from the decay of activated materials. We present two methods to calculate the recoverable energy released per fission. The first one uses the Monte Carlo N-Particle (MCNP5) code. MCNP is a probabilistic transport code that has the capability of calculating most of the heating contributions due to particle interactions with matter. The second method uses the Evaluated Nuclear Data File, ENDF/B-VII and ENDF/B-VII.1 data libraries. The ENDF data libraries contains the information required to calculate all the fission Q-value components, excepttheenergyreleasedfromradiativecapture, sincethisquantity depends on the reactor materials. To calculate this, we use the radiative capture reaction rate in MCNP5 and the binding energy of the product of the activation. We obtained a final Q-value of 200.8±0.6 MeV/fission for SAFARI-1. Using the fission Q-value result, we obtained the spatial heat distribution for SAFARI-1 by ii calculating the heating rates of the Q-value components. It was established that 97% of the heat produced is deposited in the fuel and 3% is deposited in the surrounding region of the reactor. / XL2019

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Thesis (Ph. D.)--Middle East Technical University, 2004. / Keywords: B-meson decays, Branching Ratio, Lepton Polarization Asymmetry.

An investigation is carried out to determine whether or not on the basis of theory one expects axial asymmetry in heavy nuclei. The average one-body potential well is taken as an anisotropic harmonic oscillator, modified by the usual ℓ ∙ s and ℓ² forces. The method of matrix diagonalisation is used to find the eigenvalues. Residual interaction between nucleons is also treated in the pairing approximation. The calculations show that prolate axial symmetry is favoured in each of the nuclei considered. It is possible to indicate the underlying physical reasons for this result. Assuming equilibrium prolate axial symmetry an attempt is made to understand the collective excited levels in the transition region, i.e. the region between spherical nuclei and permanently deformed nuclei. A model calculation is done to show how the levels can be obtained. / Thesis / Doctor of Philosophy (PhD)

<p> Low-lying nuclear energy levels are analyzed in terms of certain parameters of the correlation between the level spacing and the excitation energy. The statistical properties of the estimates for the parameters arising from a constant nuclear temperature model are examined. Estimates are made for the parameters for the levels of Mn^56 inferred from capture gamma spectra.</p> / Thesis / Master of Science (MSc)

<p> A method is described by which spins of nuclear energy levels might be determined, which is a combination of coincidence experiments with Sodium Iodide detectors and angular distribution measurements with high resolution solid state detectors. The method is applied to the 8.87 MeV level in Mg24. </p> / Thesis / Master of Science (MSc)

This thesis is dedicated to the production of electricity with special focus on nuclear energy. Current energy issues in the world are crucial and the today's world situation is putting pressure on energy industry to be sustainable. Goal of this work is to analyze current energy mix in the world and objectively evaluate advantages and disadvantages of different methods of electricity production from economic, as well as ecological and political view.

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Thesis (MSc.(Chemistry) - University of Pretoria, 2007. / M. R. Phupheli on cover title differs from the title page where name is written as: Phupheli Milingoni Robert. Confirmed with Student Administration that information correlates with their records. Summary in English.