JP2022153525A - 軽水炉および鉛高速炉向け高温セラミック原子燃料システム - Google Patents
軽水炉および鉛高速炉向け高温セラミック原子燃料システム Download PDFInfo
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- UTDLAEPMVCFGRJ-UHFFFAOYSA-N plutonium dihydrate Chemical compound O.O.[Pu] UTDLAEPMVCFGRJ-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
本発明は、エネルギー省との契約第DE-NE0008222号に基づく政府支援の下でなされたものである。米国政府は、本発明に対して一定の権利を有している。
3UO2+6C→2UC+UO2+4CO(1450℃を超えるアルゴン雰囲気で10~20時間)
4UC+2UO2+315N2→6U15N+4CO
ゾルゲル法および窒素雰囲気での純粋なウランのアーク溶解を用いることもできる。
Claims (13)
- 複数層から成るセラミック被覆と、
U15N燃料であって、ペレット状であり、当該セラミック被覆と当該ペレットとの間に両者間の機械的相互作用および出力異常上昇時の中心線溶融を防止するための大きさの隙間を設けて当該セラミック被覆の内部に配置されたU15N燃料とを含み、当該U15N燃料はUB2およびZrB2から成る群より選択したB-10同位体濃度がホウ素の19%~80%であるホウ素含有燃料一体型可燃性吸収材を混入させたU15Nを含むものであり、
当該U15N燃料のUN純度は90%を超え、
当該ホウ素含有燃料一体型可燃性吸収材としてのUB2またはZrB2と、核分裂性物質であるU15Nとの組み合わせは、反応を起こさない安定な組み合わせである
軽水炉および鉛高速炉向け事故耐性燃料。 - 前記セラミック被覆は少なくとも1つのモノリス層および少なくとも1つの複合材層を含む、請求項1の燃料。
- 前記セラミック被覆はSiCモノリス層およびSiCセラミック複合材層を含む、請求項2の燃料。
- 前記セラミック被覆は全層厚が0.4mmから1.4mmである、請求項1の燃料。
- 前記U15N燃料のN-15同位体濃度は75%~99.9%である、請求項1の燃料。
- 前記ホウ素含有燃料一体型可燃性吸収材はUB2である、請求項1の燃料。
- 前記U15Nペレットの前記ホウ素含有燃料一体型可燃性吸収材濃度は100ppm~10000ppmである、請求項1の燃料。
- 前記U15N燃料の密度は理論密度の80%~99%である、請求項1の燃料。
- 少なくともモノリス層および複合材層を含むセラミック被覆と、
当該セラミック被覆内に積み重ねられた複数のU15N燃料のペレットとを含み、当該セラミック被覆と当該ペレットとの間には両者間の機械的相互作用および出力異常上昇時の中心線溶融を防止するための大きさの隙間が設けられており、当該U15N燃料はUB2およびZrB2から成る群より選択したB-10同位体濃度がホウ素の19%~80%である100~10000ppmのホウ素含有燃料一体型可燃性吸収材を混入させたU15Nを含むものであり、
当該U15N燃料のUN純度は90%を超え、
当該ホウ素含有燃料一体型可燃性吸収材としてのUB2またはZrB2と、核分裂性物質であるU15Nとの組み合わせは、反応を起こさない安定な組み合わせである
事故耐性原子燃料。 - 前記セラミック被覆はSiCモノリスにSiC複合材繊維の上被を施したものである、請求項9の原子燃料。
- 前記U15N燃料はN-15同位体濃度が75%~99.9%である、請求項9原子燃料。
- 前記隙間は0.01~0.3mmの隙間である、請求項1の原子燃料。
- 前記隙間は0.01~0.3mmの隙間である、請求項9の原子燃料。
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PCT/US2018/050190 WO2019060154A2 (en) | 2017-09-18 | 2018-09-10 | HIGH-TEMPERATURE CERAMIC NUCLEAR FUEL SYSTEM FOR LIGHT-WATER REACTORS AND FAST CALIPORER-LEAD REACTORS |
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US11935662B2 (en) * | 2019-07-02 | 2024-03-19 | Westinghouse Electric Company Llc | Elongate SiC fuel elements |
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