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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 134 for “"pebble"”.
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MCNP4B modeling of pebble-bed reactors
… Carlo code MCNP4B to the neutronic modeling of pebblebed reactors was investigated. A modeling methodology was developed based on an analysis of critical experiments carried out at the HTR-PROTIEUS and ASTRA facilities, and the critical loading of the HTR-10 reactor. A body-centred cubic lattice …
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Multi-mode imaging for TRISO-fueled pebble identification
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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Modularity in design of the MIT Pebble Bed Reactor
The future of new nuclear power plant construction will depend in large part on the ability of designers to reduce capital, operations, and maintenance costs. One of the methods proposed, is to enhance the modularity of the designs in which the basic plant is broken down into modules, each of which …
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The power of a pebble : exploring and mapping directed graphs
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Feasibility of breed/burn fuel cycles in pebble bed HTGR reactors.
Thesis. 1978. M.S.--Massachusetts Institute of Technology. Dept. of Nuclear Engineering.
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Monte Carlo study of pebble bed reactor fuel reactivity and isotopics
… used in a future verification of the VSOP code. Pebble bed critical experiments carried out on the Swiss PROTEUS facility were chosen as a starting point for a pebble bed benchmark using the Monteburns code. Monteburns, a linking code that uses the ORIGEN2 code to burn MCNP inputs, was used to …
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Waste characteristics of spent nuclear fuel from a pebble bed reactor
… a high-temperature, gas cooled, reactor with a pebble bed core (PBR) and a pressurized water reactor (PWR). There are three significant differences which impact the disposal characteristics of PBR spent pebble fuel from PWR spent fuel assemblies. Pebble bed fuel has bum-up as high as 100,000 …
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Isotopic and reactor physics characterization of a gas-cooled, pebble-bed microreactor
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Microstructural and crystallographic fabric analysis of stretched-pebble conglomerates in central Vermont
… Recrystallization textures within quartz-rich pebbles suggest dynamic recrystallization via subgrain rotation and grain boundary migration. Dynamically recrystallized quartz grains have a grain shape preferred orientation, which is parallel to a series of intracrystalline strain features …
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Resource Debate in Southwest Alaska: The Bristol Bay Fishery and the Pebble Mine
… than $500 billion. This plan is known as the Pebble Project, and could involve an open-pit mine, a large area of block caving, as well as the creation of huge tailings ponds north of Lake Iliamna. The proposed site of the mine straddles a drainage divide that affects two major watersheds that …
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Resource Debate in Southwest Alaska: The Bristol Bay Fishery and the Pebble Mine
… than $500 billion. This plan is known as the Pebble Project, and could involve an open-pit mine, a large area of block caving, as well as the creation of huge tailings ponds north of Lake Iliamna. The proposed site of the mine straddles a drainage divide that affects two major watersheds that …
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Multiple-Input Single-Output system identification techniques using the pebble bed modular reactor data
… to obtain a (MISO) mathematical model for the Pebble Bed Modular Reactor (PBMR). MISO system identification techniques are used in this project to study the effect that the inputs have on each other. This information helps in the understanding of processes within the system. The reason for …
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Analysis of the proliferation resistance of the modular pebble bed high temperature gas reactor
The Modular Pebble Bed High Temperature Gas Reactor (MPBR) being designed by the Massachusetts Institute of Technology and the Idaho National Engineering and Environmental Laboratory operates with an online refueling system. This leads to an increased risk of proliferation because the fuel pebbles …
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Effect of helium injection on diffusion dominated air ingress accidents in pebble bed reactors
… To validate SCAD a small scale simulated Pebble Bed Reactor (PBR) was constructed and a series of air ingress experiments with and without helium injection were conducted. In addition, Computational Fluid Dynamic (CFD) simulations were performed using FLUENT @ to model the experiment and …
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Modularity of the MIT Pebble Bed Reactor for use by the commercial power industry
The Modular Pebble Bed Reactor is a small high temperature helium cooled reactor that is being considered for both electric power and hydrogen production. Pebble bed reactors are being developed in South Africa, China and the US. To make smaller 120 Mwe reactors economically competitive with larger …
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Red-blue and standard pebble games : complexity and applications in the sequential and parallel models
Pebble games are games played on directed acyclic graphs involving placing and moving pebbles on nodes of the graph according to a certain set of rules. The standard pebble game (also known as the black pebble game) is the first of such games played on DAGs. The game itself involves three simple …
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Probabilistic accident analysis of the Pebble Bed modular Reactor for use with risk informed regulation
… the pre- application review of the gas-cooled Pebble Bed Modular Reactor (PBMR) has shown that efforts are being made to provide additional "risk-informed" improvements to the licensing process. The work presented herein was completed as part of the DOE Nuclear Energy Research Initiative …
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Characterisation of the effective thermal conductivity in the near wall region of a packed pebble bed
… necessary for the design and analysis of packed pebble bed gas-cooled reactors, especially when considering the safety case. The wall effect present in the near-wall region affects the conduction and radiation heat transfer in this region. Various correlations and models exist to predict the …
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Stratigraphy, genesis, and economic potential of the southern part of the Florida land-pebble phosphate field
… important and highly productive Florida land-pebble phosphate field is located in west central peninsular Florida in portions of Hillsborough, Polk, Hardee, and Manatee counties. The Pine Level phosphate area, described in detail in this report, is south of the previously known and mined …
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