The Heat Rating Required to Produce Central Melting in Various UO Fuels

A Bain

doi:10.1520/STP44384S

SYMPOSIA PAPER Published: 01 January 1962

STP44384S

The Heat Rating Required to Produce Central Melting in Various UO Fuels

Source

In specimens of uranium oxides irradiated at high heat ratings for a few minutes or several days, central melting can be distinguished from columnar or equiaxed grain growth which takes place below the melting point. Evidence of melting has been observed in six different types of fuel: (1) UO_2.0 pellets formed by cold compacting and sintering; (2) UO_2.12 pellets; (3) UO_2.19 pellets; (4) UO_2.0 — 4 molecular per cent Y₂O₃ pellets; (5) cold swaged UO_2.0; and (6) loose compacted UO_2.0. The results show that the integrated thermal conductivity of the fuel up to its melting point is higher for the stoichiometric pellets than for any of the other types tested.

Author Information

Bain, A, S

Fuel Development Branch, Atomic Energy of Canada, Ltd., Chalk River, Ont., Canada

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Details

Developed by Committee: E10

Pages: 30–46

DOI: 10.1520/STP44384S

ISBN-EB: 978-0-8031-5966-2

ISBN-13: 978-0-8031-6120-7

The Heat Rating Required to Produce Central Melting in Various UO Fuels

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