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## Full-Text Articles in Nuclear Engineering

Development Of Two-Group, Two-Dimensional, Frequency Dependent Detector Adjoint Function Based On The Nodal Method , Soli T. Khericha

#### Development Of Two-Group, Two-Dimensional, Frequency Dependent Detector Adjoint Function Based On The Nodal Method , Soli T. Khericha

*Retrospective Theses and Dissertations*

A concept of local/global components, based on the frequency dependent detector adjoint function, and a nodalization technique was utilized in the development of one- and two- dimensional computer codes to calculate the response of a detector to a vibrating absorber in reactor cores. The frequency dependent detector adjoint functions presented by complex equations were expanded into real and imaginary parts. In the nodalization technique, the flux is expanded into polynomials about the center point of each node;The phase angles and the magnitudes of the two-energy group detector adjoint functions were calculated for a neutron detector located in the ...

A Three-Dimensional Nodal Solution For The Frequency Dependent Neutron Diffusion Equation , Abdulghani M. Melaibari

#### A Three-Dimensional Nodal Solution For The Frequency Dependent Neutron Diffusion Equation , Abdulghani M. Melaibari

*Retrospective Theses and Dissertations*

This research involves the development of a three-dimensional nodal code that calculates the Fourier transformed regular or adjoint neutron flux for a nuclear reactor. This numerical technique can be used in the nuclear reactor noise analysis field for identifying and locating vibrating reactor core components;The mathematical equations were developed and two types of solutions were obtained. The first solution was a modification of a three-dimensional nodal model developed to handle multigroup neutron diffusion equations. In this model, the Fourier transformed fluxes were expanded in the Legendre polynomial form. The second is an analytical procedure developed for a simple geometry ...

Disposal Of Spent Nuclear Fuel And High-Level Waste: Design And Technical/Economic Analysis , Jordi Roglans-Ribas

#### Disposal Of Spent Nuclear Fuel And High-Level Waste: Design And Technical/Economic Analysis , Jordi Roglans-Ribas

*Retrospective Theses and Dissertations*

An economic model for the back end of the nuclear fuel cycle was developed for a once-through cycle, a standard reprocessing cycle, and a reprocessing cycle with fractionation of cesium and strontium. The development of the model was performed under the expected political constraints and scenario for the first nuclear waste repository. Technical issues concerning the repository design were analyzed, in particular the thermal design. A parametric thermal analysis was performed for waste emplaced in five different geologic formations: salt, granite, basalt, shallow tuff, and deep tuff. The results of the thermal analysis, in the form of maximum permissible loadings ...