A Model to Predict the Ultimate Failure of Coated Fuel Particles During Core Heatup Events

Ogawa, Teiichiro; Minato, Kazuo; Fukuda, Kousaku; Numata, Masami; Miyanishi, Hideshi; Sekino, Hajime; Matsushima, Hitoshi; Itoh, Tadaharu; Kado, Shigeo; Takahashi, Ishio

doi:10.13182/nt91-a34592

Cited by 17 publications

(2 citation statements)

References 12 publications

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“…Except for silver, all metallic and gaseous fission products are effectively retained by this barrier. The long term operating temperature for the SiC coating is 1250-1300°C with shortterm excursions to 1500-1600°C having been demonstrated (Ogawa, et al, 1992;IAEA, 1997;Ogawa, et al, 1991) Zirconium carbide (ZrC) has a melting point of 3540°C and melts eutectically with carbon at 2850°C (Ogawa, et al, 1985). This temperature is significantly above the acceptable operating point of SiC.…”

Section: High Temperature Optionsmentioning

confidence: 99%

Very High Efficiency Reactor (VHER) Concepts for Electrical Power Generation and Hydrogen Production

Parma¹,

Pickard²,

Suo-Anttila³

2003

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The goal of the Very High Efficiency Reactor study was to develop and analyze concepts for the next generation of nuclear power reactors. The next generation power reactor should be cost effective compared to current power generation plant, passively safe, and proliferation-resistant. High-temperature reactor systems allow higher electrical generating efficiencies and hightemperature process heat applications, such as thermo-chemical hydrogen production. The study focused on three concepts; one using molten salt coolant with a prismatic fuel-element geometry, the other two using high-pressure helium coolant with a prismatic fuel-element geometry and a fuel-pebble element design. Peak operating temperatures, passive-safety, decay heat removal, criticality, burnup, reactivity coefficients, and material issues were analyzed to determine the technical feasibility of each concept.4

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Section: High Temperature Optionsmentioning

confidence: 99%

Very High Efficiency Reactor (VHER) Concepts for Electrical Power Generation and Hydrogen Production

Parma¹,

Pickard²,

Suo-Anttila³

2003

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“…It is well known and proved that the carbon and/or silicon coated particle nuclear fuel for high temperature gas reactor (HTGR) is quite resistant to fission products release even at elevated temperature. 3) Moreover, the graphite moderator is helpful to reduce the fuel temperature rise in case of LOCA because of its large heat capacity. Thus a longer time interval can be available for emergency core cooling, so that ECCS can be even eliminated.…”

Section: Basic Concept Of the Reactor Systemmentioning

confidence: 99%

Optimal Burnable Poison-Loading in a PWR with Carbon Coated Particle Fuel.

Kauchi

Shimazu

2003

J. Nucl. Sci. Technol.

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An innovative PWR concept that uses carbon-coated particle fuels moderated by graphite as that of HTGR but cooled by pressurized light water has been studied. The aim of this concept is to take both the best advantages of fuel integrity against fission products release and the reliability of PWR technology based on the long operational experience.The purpose of the study is to optimize loading pattern of burnable poison in the proposed core in order to suppress excess reactivity during a cycle. Although there are many parameters to be determined for optimization of the usage of burnable poison, the emphasis is put here on loading patterns of Gadolinia in an assembly and in the core. We investigated the burnup characteristics of the core varying the concentration of burnable poison in a fuel rod, the number of burnable poison-rods in an assembly, and the number of burnable poison-assemblies in the core. The result suggested that Gadolinia was more suitable for this reactor than boron as burnable poison, and it was possible to make the reactivity swing negligible by combining at least three kinds of burnable poison-assemblies in which the amount of Gadolinia was different. Therefore the requirement for the number of control rods was reduced and it meant that Control Rod Programming would become easier.

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Release behavior of metallic fission products from HTGR fuel particles at 1600 to 1900°C

Minato

Ogawa

Fukuda

et al. 1993

Journal of Nuclear Materials

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A Model to Predict the Ultimate Failure of Coated Fuel Particles During Core Heatup Events

Cited by 17 publications

References 12 publications

Very High Efficiency Reactor (VHER) Concepts for Electrical Power Generation and Hydrogen Production

Very High Efficiency Reactor (VHER) Concepts for Electrical Power Generation and Hydrogen Production

Optimal Burnable Poison-Loading in a PWR with Carbon Coated Particle Fuel.

Release behavior of metallic fission products from HTGR fuel particles at 1600 to 1900°C

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