Multi-cell thermionic fuel element for nuclear electric power and propulsion system

Nikolaev, Yuri V.; Gontar, A. S.; Eremin, S.A.; Lapochkin, Nikolai V.; Андреев, П. В.; Zhabotinsky, Evgeny E.

doi:10.1063/1.57559

AIP Conference Proceedings 1999

DOI: 10.1063/1.57559

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Multi-cell thermionic fuel element for nuclear electric power and propulsion system

Yuri V. Nikolaev¹,

A. S. Gontar²,

S.A. Eremin³

et al.

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2005

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“…The experimental data were used for computational analysis of the deformational behavior of a fuel element in a two-regime nuclear power system [7] under the action of a swelling kernel as a function of the structural state of the uranium dioxide. The calculations showed that a decrease of the width of columnar grains from 250 to 100 µm decreases the deformation rate of cladding made of strengthened single-crystalline alloy W-Nb [8] severalfold in the forced and in the nominal operating regimes of the nuclear power system.…”

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confidence: 99%

Optimization of Uranium Dioxide Structure for Use in the Fuel Elements of a Thermionic Converter Reactor

et al. 2005

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The results are presented of an extra-reactor investigation of a change in the structure of the uranium dioxide in a high-temperature fuel element in the field of a temperature gradient using an electric heater. It is shown that the width of a columnar grain of the restructured dioxide can be decreased from the characteristic value 200-250 µm down to 100 µm using dioxide with thermally stabilized porosity with porosity up to 20%. The creep characteristics of columnar uranium dioxide within this width range of a columnar grain are presented. The calculations show that the deformation rate of fuel-element cladding made of the hardened single-crystal alloy W-Nb under the action of a swelling kernel decreases severalfold when the grain width decreases to 100 µm.

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mentioning

confidence: 99%

Optimization of Uranium Dioxide Structure for Use in the Fuel Elements of a Thermionic Converter Reactor

et al. 2005

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Multi-cell thermionic fuel element for nuclear electric power and propulsion system

Cited by 1 publication

References 6 publications

Optimization of Uranium Dioxide Structure for Use in the Fuel Elements of a Thermionic Converter Reactor

Optimization of Uranium Dioxide Structure for Use in the Fuel Elements of a Thermionic Converter Reactor

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