An Integrated Performance Model for High Temperature Gas Cooled Reactor Coated Particle Fuel
An Integrated Performance Model for High Temperature Gas Cooled Reactor Coated Particle Fuel

Author: Jing Wang

Publisher:

Published: 2004

Total Pages: 300

ISBN-13:

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The performance of coated fuel particles is essential for the development and deployment of High Temperature Gas Reactor (HTGR) systems for future power generation. Fuel performance modeling is indispensable for understanding the physical behavior of fuel particles and achieving their high reliability during operations and accidents through a guided design process. This thesis develops an integrated fuel performance model of coated particle fuel to comprehensively study its mechanical behavior and define an optimum fuel design strategy with the aid of the model. Key contributions of the thesis include a pyrocarbon layer crack induced particle failure model with a fracture mechanics approach, mechanical analysis of particles with better representation of irradiation induced creep, a proposed fuel optimization procedure, the capability to simulate arbitrary irradiation histories, and the incorporation of Monte Carlo sampling to account for the statistical variation of particle properties.

Development of an Integrated Performance Model for TRISO-Coated Gas Reactor Particle Fuel
Development of an Integrated Performance Model for TRISO-Coated Gas Reactor Particle Fuel

Author: David Andrew Petti

Publisher:

Published: 2005

Total Pages:

ISBN-13:

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The success of gas reactors depends upon the safety and quality of the coated particle fuel. The understanding and evaluation of this fuel requires development of an integrated mechanistic fuel performance model that fully describes the mechanical and physico-chemical behavior of the fuel particle under irradiation. Such a model, called PARFUME (PARticle Fuel ModEl), is being developed at the Idaho National Engineering and Environmental Laboratory. PARFUME is based on multi-dimensional finite element modeling of TRISO-coated gas reactor fuel. The goal is to represent all potential failure mechanisms and to incorporate the statistical nature of the fuel. The model is currently focused on carbide, oxide nd oxycarbide uranium fuel kernels, while the coating layers are the classical IPyC/SiC/OPyC. This paper reviews the current status of the mechanical aspects of the model and presents results of calculations for irradiations from the New Production Modular High Temperature Gas Reactor program.

Development of a High Temperature Gas-Cooled Reactor TRISO-coated Particle Fuel Chemistry Model
Development of a High Temperature Gas-Cooled Reactor TRISO-coated Particle Fuel Chemistry Model

Author: Jane T. Diecker

Publisher:

Published: 2005

Total Pages: 137

ISBN-13:

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The first portion of this work is a comprehensive analysis of the chemical environment in a High Temperature Gas-Cooled Reactor TRISO fuel particle. Fission product inventory versus burnup is calculated. Based on those results a thermodynamic analysis is performed to determine fission product vapor pressures, oxygen partial pressure, and carbon monoxide and carbon dioxide gas pressures within the fuel particle. Using the insight gained from the chemical analysis, a chemical failure model is incorporated into the MIT fuel performance code, TIMCOAT. Palladium penetration of the SiC layer is added to the fracture mechanics failure model. Rare-earth fission product and palladium corrosion of the SiC layer are additionally modeled. The amoeba effect is added as a new failure mode. The palladium penetration model has the most significant result on the overall fuel performance model and increases the number of predicted particle failures. The thinning of the SiC layer due to fission product corrosion has a slight effect on the overall fuel performance model. Finally, the amoeba effect model does not lead to any particle failures, but adds to the completeness of the overall model.

Fuel Performance Models for High-temperature Gas-cooled Reactor Core Design
Fuel Performance Models for High-temperature Gas-cooled Reactor Core Design

Author:

Publisher:

Published: 1983

Total Pages:

ISBN-13:

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Mechanistic fuel performance models are used in high-temperature gas-cooled reactor core design and licensing to predict failure and fission product release. Fuel particles manufactured with defective or missing SiC, IPyC, or fuel dispersion in the buffer fail at a level of less than 5 x 10−4 fraction. These failed particles primarily release metallic fission products because the OPyC remains intact on 90% of the particles and retains gaseous isotopes. The predicted failure of particles using performance models appears to be conservative relative to operating reactor experience.

Advances in High Temperature Gas Cooled Reactor Fuel Technology
Advances in High Temperature Gas Cooled Reactor Fuel Technology

Author: International Atomic Energy Agency

Publisher:

Published: 2012-06

Total Pages: 639

ISBN-13: 9789201253101

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This publication reports on the results of a coordinated research project on advances in high temperature gas cooled reactor (HTGR) fuel technology and describes the findings of research activities on coated particle developments. These comprise two specific benchmark exercises with the application of HTGR fuel performance and fission product release codes, which helped compare the quality and validity of the computer models against experimental data. The project participants also examined techniques for fuel characterization and advanced quality assessment/quality control. The key exercise included a round-robin experimental study on the measurements of fuel kernel and particle coating properties of recent Korean, South African and US coated particle productions applying the respective qualification measures of each participating Member State. The summary report documents the results and conclusions achieved by the project and underlines the added value to contemporary knowledge on HTGR fuel.

Proceedings of The 20th Pacific Basin Nuclear Conference
Proceedings of The 20th Pacific Basin Nuclear Conference

Author: Hong Jiang

Publisher: Springer

Published: 2017-01-29

Total Pages: 901

ISBN-13: 9811023174

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This is the second in a series of three proceedings of the 20th Pacific Basin Nuclear Conference (PBNC). This volume covers the topics of Operation and Maintenance, Supply Capability and Quality Control, Fuel Cycles, as well as New Technology and New Applications. As one in the most important and influential conference series of nuclear science and technology, the 20th PBNC was held in Beijing and the theme of this meeting was “Nuclear: Powering the Development of the Pacific Basin and the World”. It brought together outstanding nuclear scientist and technical experts, senior industry executives, senior government officials and international energy organization leaders from all across the world. The book is not only a good summary of the new developments in the field, but also a useful guideline for the researchers, engineers and graduate students.

The Passive Safety Characteristics of Modular High Temperature Gas-cooled Reactor Fuel Elements
The Passive Safety Characteristics of Modular High Temperature Gas-cooled Reactor Fuel Elements

Author:

Publisher:

Published: 1988

Total Pages:

ISBN-13:

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High-Temperature Gas-Cooled Reactors (HTGR) in both the US and West Germany use an all-ceramic, coated fuel particle to retain fission products. Data from irradiation, postirradiation examinations and postirradiation heating experiments are used to study the performance capabilities of the fuel particles. The experimental results from fission product release tests with HTGR fuel are discussed. These data are used for development of predictive fuel performance models for purposes of design, licensing, and risk analyses. During off normal events, where temperatures may reach up to 1600°C, the data show that no significant radionuclide releases from the fuel will occur.