Home / Store / Journals / Electronic Articles / Nuclear Technology / Volume 2 / Number 6 / Pages 477-480
M. J. F. Notley, J. R. MacEwan
Nuclear Technology / Volume 2 / Number 6 / Pages 477-480
Format:electronic copy (download)
Measurements of the fission-product gas pressure in UO2 fuel elements during irradiation have shown that a significant amount of gas is released during power transients. The gas appears to he released as the element power is decreased to zero during reactor shutdown; little release occurs as the power is raised at startup. It is postulated that gas trapped in bubbles or in a central void is released by cracking or stress-induced movement during the power transient.
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