Preparation technology for irradiated nuclear fuel core electron microscope sample

Abstract

The invention discloses a preparation technology for an irradiated nuclear fuel core electron microscope sample. The preparation technology comprises the following preparation processes, such as cutting sampling, sample splicing, sample grinding / polishing and the like, so that the irradiated nuclear fuel core electron sample is manufactured. The preparation technology disclosed by the invention meets use requirements on scanning electron microscopes, and the manufactured irradiated nuclear fuel core electron sample is suitable for observing number, size, form and distribution situations of air holes in fuel particles under the scanning electron microscopes.

Description

technical field [0001] The invention relates to a nuclear fuel element post-irradiation performance detection technology, in particular to a preparation process of nuclear fuel core electron microscope samples after irradiation. Background technique [0002] The performance of nuclear fuel elements is directly related to the safety and economy of reactor operation. Studying the distribution and size of nuclear fuel core pores is of great significance to the safe operation of reactors and the improvement of nuclear fuel assemblies. The key technology for observing the distribution and shape of nuclear fuel core pores with a scanning electron microscope lies in the preparation process of nuclear fuel core samples. . Since the core sample of dispersed nuclear fuel has strong γ-rays after irradiation, the preparation process of the SEM sample is the key to determining whether the core pore morphology of the nuclear fuel after irradiation can be observed. [0003] There have be...

AI Technical Summary

Problems solved by technology

[0004] For nuclear fuel core samples with a size above the micron level and in a completely open place, use a scanning electron microscope to observe the dispersed fuel core samples after irradiation, and to observe the core pore morphology of the dispersed nuclear fuel after irradiation The preparation process of the SEM sample has not been reported