NSUF 19-1621: In-situ separate effect studies of thermal and radiation effects on Xe diffusion in alpha-U and U-10Zr.
The proposed Rapid Turnaround Experiment aims at clarifying Xe diffusion in alpha Uranium and U-10Zr fuel. The objective of this separate effect study is to understand and monitor in-situ Xe diffusion. This will be performed by systematic tests to separate thermal and radiation contribution to Xe diffusion in the different tested materials, thus varying one parameter at a time. While DFT simulation on Xe incorporation in U-Zr exist and many integral release tests have been performed, systematic studies on fission gas behavior and stability in metallic fuel are limited. The data obtained will provide a deeper mechanistic understanding of fission gases diffusion, starting from a simple sample (polycrystalline alpha uranium) followed by U-10Zr, and thus could contribute to the development of models for fission gases behavior in metallic fuel. Future follow on study could be involved more prototypical samples. Three alpha uranium samples and three U-10Zr samples, will be implanted with Xe and following characterized. In-situ heating study will be performed with different temperatures to understand thermal diffusion. In one of the heating tests the combine effect of radiation enhanced diffusion will be investigated by continuous ion irradiation during the heating test. These data could potentially clarify diffusion mechanism and provide the basis for the determination of diffusion coefficients. The experiments are proposed to be conducted in IVEM Facility in April 2019 and will require 10 days instrument time.
Additional Info
| Field | Value |
|---|---|
| Abstract | The proposed Rapid Turnaround Experiment aims at clarifying Xe diffusion in alpha Uranium and U-10Zr fuel. The objective of this separate effect study is to understand and monitor in-situ Xe diffusion. This will be performed by systematic tests to separate thermal and radiation contribution to Xe diffusion in the different tested materials, thus varying one parameter at a time. While DFT simulation on Xe incorporation in U-Zr exist and many integral release tests have been performed, systematic studies on fission gas behavior and stability in metallic fuel are limited. The data obtained will provide a deeper mechanistic understanding of fission gases diffusion, starting from a simple sample (polycrystalline alpha uranium) followed by U-10Zr, and thus could contribute to the development of models for fission gases behavior in metallic fuel. Future follow on study could be involved more prototypical samples. Three alpha uranium samples and three U-10Zr samples, will be implanted with Xe and following characterized. In-situ heating study will be performed with different temperatures to understand thermal diffusion. In one of the heating tests the combine effect of radiation enhanced diffusion will be investigated by continuous ion irradiation during the heating test. These data could potentially clarify diffusion mechanism and provide the basis for the determination of diffusion coefficients. The experiments are proposed to be conducted in IVEM Facility in April 2019 and will require 10 days instrument time. |
| Award Announced Date | 2019-02-08T00:00:00 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Wei-Ying Chen |
| Irradiation Facility | None |
| PI | Fidelma Di Lemma |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 1621 |