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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >THE KINETICS OF ALPHA-DECAY-INDUCED AMORPHIZATION IN ZIRCON AND APATITE CONTAINING WEAPONS-GRADE PLUTONIUM OR OTHER ACTINIDES
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THE KINETICS OF ALPHA-DECAY-INDUCED AMORPHIZATION IN ZIRCON AND APATITE CONTAINING WEAPONS-GRADE PLUTONIUM OR OTHER ACTINIDES

机译：含锆和磷灰石的武器级P或其他ACT系元素的α-衰变诱导的电离动力学

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Zircon and apatite form as actinide host phases in several high-level waste forms and have been proposed as host phases for the disposition of excess weapons-grade Pu and other actinides. Additionally, closely-related structure types appear as actinide-bearing phases among the corrosion products of spent nuclear fuel and high-level waste glasses. Self-radiation damage from alpha-decay of the incorporated Pu or other actinides can affect the durability and performance of these actinide-bearing phases. For both zircon and apatite, these effects can be modeled as functions of storage time and repository temperature and validated by comparison with data from natural occurrences. Natural zircons and apatites, with ages up to 4 billion years, provide abundant evidence for their long-term durability because of their wide spread use in geochronology and fission-track dating. Detailed studies of natural zircons and apatites, Pu-238-containing zircon, a Cm-244-containing silicate apatite, and ion-irradiated zircon, natural apatite and synthetic silicate apatites provide a unique basis for the analysis of alpha-decay effects over broad time scales. Models for alpha-decay effects in zircon and apatite are developed that show alpha-decay of Pu and other actinides will lead to a crystalline-to-amorphous transformation in zircon, but not in apatite, under conditions typical of a repository, such as the Yucca Mountain site. (C) 1997 Elsevier Science B.V. [References: 74]
机译：锆石和磷灰石形式以几种高级废物形式作为act系元素宿主相，并已被提议作为处置多余武器级Pu和其他act系元素的宿主相。此外，在废核燃料和高级废玻璃的腐蚀产物中，密切相关的结构类型表现为act系元素相。掺入的Pu或其他act系元素的α衰变引起的自辐射损伤会影响这些带有act系元素的相的耐久性和性能。对于锆石和磷灰石，可以将这些效应建模为储存时间和储存温度的函数，并通过与自然事件数据进行比较来验证。天然锆石和磷灰石的年龄高达40亿年，因为它们在地球年代学和裂变径迹中的广泛使用，为它们的长期耐久性提供了充足的证据。对天然锆石和磷灰石，含Pu-238的锆石，含Cm-244的硅酸盐磷灰石以及离子辐照锆石，天然磷灰石和合成硅酸盐磷灰石的详细研究为分析大范围的α衰变效应提供了独特的基础时间尺度。开发了锆石和磷灰石中α衰变效应的模型，该模型显示出Pu和其他act系元素的α衰变将在典型的储藏条件下，例如锆石，导致锆石中的晶体向非晶转变，而不是磷灰石。丝兰山遗址。 （C）1997 Elsevier Science B.V. [参考：74]

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