Abstract: By reference to a fission-yield curve, fission products of greatest importance in the operation of possible new reactor systems having ceramic fuel elements in direct contact with the coolant gas are shown. Methods developed in the Chemistry Division at Harwell are reviewed for studying the emission of fission-product gases (isotopes of krypton and xenon) from potential fuel-element materials. BeO- UO/sub 2/ ceramics of high density showed great retention of fission gases, UO/sub 2/--Al/sub 2/O/sub 3/ --SiO/sub 2/ ceramics showed good retentivity as did sintered UO/sub 2/ but, with the latter, oxygen caused a marked diminution in retentivity. A UO/sub 2/--MgO ceramic (80% theoretical density) had given off nearly all the fission gases at 800 deg C. (auth)
Publication Year: 1963
Publication Date: 1963-03-01
Language: en
Type: article
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