Method of vitrifying high-level radioactive liquid waste
First Claim
1. A method of vitrifying a high-level radioactive liquid waste comprising removing a precipitate composed mainly of Mo and Zr from the high-level radioactive liquid waste, mixing the resulting high-level radioactive liquid waste with a raw glass material having a chemical composition wherein the B2 O3 /SiO2, ZnO/Li2 O and Al2 O3 /Li2 O ratios are at least 0.41, at least 1.00 and at least 2.58, respectively, and melt-solidifying the mixture to thereby form a vitrified waste.
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Abstract
A method of vitrifying a high-level radioactive liquid waste comprising removing a precipitate composed mainly of Mo and Zr from the high-level liquid waste, mixing the resulting high-level liquid waste with a raw glass material having a chemical composition wherein the B2 O3 /SiO2, ZnO/Li2 O and Al2 O3 /Li2 O ratios are at least 0.41, at least 1.00 and at least 2.58, respectively, and melt-solidifying the mixture to thereby form a vitrified waste. By using such a raw glass material, there can be obtained a vitrifled waste having the waste content of about 45% by oxide weight in which the same leaching rate as that of a conventional vitrified waste having the waste content of 25% by oxide weight is ensured without suffering from yellow phase separation.
14 Citations
2 Claims
- 1. A method of vitrifying a high-level radioactive liquid waste comprising removing a precipitate composed mainly of Mo and Zr from the high-level radioactive liquid waste, mixing the resulting high-level radioactive liquid waste with a raw glass material having a chemical composition wherein the B2 O3 /SiO2, ZnO/Li2 O and Al2 O3 /Li2 O ratios are at least 0.41, at least 1.00 and at least 2.58, respectively, and melt-solidifying the mixture to thereby form a vitrified waste.
Specification
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- Resources
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Current AssigneeJapan Nuclear Cycle Development Institute
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Original AssigneeDoryokuro Kakunenryo Kaihatsu Jigyodan
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InventorsKawamura, Kazuhiro, Yoneya, Masayuki, Sasage, Kenichi
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Primary Examiner(s)MAI, NGOCLAN THI
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Application NumberUS08/520,786Time in Patent Office300 DaysField of Search588/12, 501/155, 501/152, 501/153, 501/154, 976/DIG. 385US Class Current588/12CPC Class CodesG21F 9/305 Glass or glass like matrix ...
