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You searched for subject:(Advanced fuels). Showing records 1 – 2 of 2 total matches.

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Missouri University of Science and Technology

1. Prewitt, Benjamin Joseph. Analysis and implementation of accident tolerant nuclear fuels.

Degree: M.S. in Nuclear Engineering, Nuclear Engineering, Missouri University of Science and Technology

"To improve the reliability and robustness of LWR, accident tolerant nuclear fuels and cladding materials are being developed to possibly replace the current UO2/zirconium system. This research highlights UN and U3Si2, two of the most favorable accident tolerant fuels being developed. To evaluate the commercial feasiblilty of these fuels, two areas of research were conducted. Chemical fabrication routes for both fuels were investigated in detail, considering UO2 and UF6 as potential starting materials. Potential pathways for industrial scale fabrication using these methods were discussed. Neutronic performance of 70%UN-30%U3Si2 composite was evaluated in MNCP using PWR assembly and core models. The results showed comparable performance to an identical UO2 fueled simulation with the same configuration. The parameters simulated for composite and oxide fuel include the following: fuel to moderator ratio curves; energy dependent flux spectra; temperature coefficients for fuel and moderator; delayed neutron fractions; power peaking factors; axial and radial flux profiles in 2D and 3D; burnup; critical boron concentration; and shutdown margin. Overall, the neutronic parameters suggest that the transition from UO2 to composite in existing nuclear systems will not require significant changes in operating procedures or modifications to standards and regulations" – Abstract, page iii.

Subjects/Keywords: Advanced Fuels Campaign; Uranium Nitride; Uranium Silicide; Nuclear Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Prewitt, B. J. (n.d.). Analysis and implementation of accident tolerant nuclear fuels. (Masters Thesis). Missouri University of Science and Technology. Retrieved from http://scholarsmine.mst.edu/masters_theses/7657

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Chicago Manual of Style (16th Edition):

Prewitt, Benjamin Joseph. “Analysis and implementation of accident tolerant nuclear fuels.” Masters Thesis, Missouri University of Science and Technology. Accessed April 19, 2019. http://scholarsmine.mst.edu/masters_theses/7657.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

MLA Handbook (7th Edition):

Prewitt, Benjamin Joseph. “Analysis and implementation of accident tolerant nuclear fuels.” Web. 19 Apr 2019.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Prewitt BJ. Analysis and implementation of accident tolerant nuclear fuels. [Internet] [Masters thesis]. Missouri University of Science and Technology; [cited 2019 Apr 19]. Available from: http://scholarsmine.mst.edu/masters_theses/7657.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Council of Science Editors:

Prewitt BJ. Analysis and implementation of accident tolerant nuclear fuels. [Masters Thesis]. Missouri University of Science and Technology; Available from: http://scholarsmine.mst.edu/masters_theses/7657

Note: this citation may be lacking information needed for this citation format:
No year of publication.

2. Marquez, Matias G. Silicide fuel swelling behavior and its performance in I2S-LWR.

Degree: MS, Mechanical Engineering, 2015, Georgia Tech

The swelling mechanisms of U3Si2 under neutron irradiation in reactor conditions are not unequivocally known. The limited experimental evidence that is available suggests that the main driver of the swelling in this material would be fission gases accumulation at crystalline grain boundaries. The steps that lead to the accumulation of fission gases at these locations are multiple and complex. However, gradually, the gaseous fission products migrate by diffusion. Upon reaching a grain boundary, which acts as a trap, the gaseous fission products start to accumulate, thus leading to formation of bubbles and hence to swelling. Therefore, a quantitative model of swelling requires the incorporation of phenomena that increase the presence of grain boundaries and decrease grain sizes, thus creating sites for bubble formation and growth. It is assumed that grain boundary formation results from the conversion of stored energy from accumulated dislocations into energy for the formation of new grain boundaries.This thesis attempts to develop a quantitative model for grain subdivision in U3Si2 based on the above mentioned phenomena to verify the presence of this mechanism and to use in conjunction with swelling codes to evaluate the total swelling of the pellet in the reactor during its lifetime. Advisors/Committee Members: Petrovic, Bojan (advisor), Ougouag, Abderrafi (advisor), Deo, Chaitanya (committee member).

Subjects/Keywords: Silicide fuels; Swelling; Recrystallization; Grain subdivision; Nuclear fuel; Accident tolerant fuel; Advanced fuels; Rim effect; High burnup structure; Fuel performance

…of clean energy, useful to reduce CO2 emissions. However, the low price of fossil fuels and… …dimensional change of U3Si2 fuels can largely exceed the expected swelling levels considered… …comprehensive model to predict the swelling of U3Si2 fuels subjected to irradiation under PWR… …material. Bubbles are one of the main drivers of swelling in fuels. As bubbles grow, material is… …worked copper grain refinement [19]. A similar effect is postulated for nuclear fuels… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Marquez, M. G. (2015). Silicide fuel swelling behavior and its performance in I2S-LWR. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/53970

Chicago Manual of Style (16th Edition):

Marquez, Matias G. “Silicide fuel swelling behavior and its performance in I2S-LWR.” 2015. Masters Thesis, Georgia Tech. Accessed April 19, 2019. http://hdl.handle.net/1853/53970.

MLA Handbook (7th Edition):

Marquez, Matias G. “Silicide fuel swelling behavior and its performance in I2S-LWR.” 2015. Web. 19 Apr 2019.

Vancouver:

Marquez MG. Silicide fuel swelling behavior and its performance in I2S-LWR. [Internet] [Masters thesis]. Georgia Tech; 2015. [cited 2019 Apr 19]. Available from: http://hdl.handle.net/1853/53970.

Council of Science Editors:

Marquez MG. Silicide fuel swelling behavior and its performance in I2S-LWR. [Masters Thesis]. Georgia Tech; 2015. Available from: http://hdl.handle.net/1853/53970

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