A method for the production of reactor MOX fuel powder

CN119153143BActive Publication Date: 2026-06-05CHINA INSTITUTE OF ATOMIC ENERGY

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: CHINA INSTITUTE OF ATOMIC ENERGY
Filing Date: 2024-07-30
Publication Date: 2026-06-05

AI Technical Summary

Technical Problem

Existing MOX fuel powder preparation processes are characterized by long processes, large amounts of waste liquid, high equipment requirements, high operational difficulty, and difficulty in adapting to different abundance and content requirements. Dry processes suffer from plutonium-rich particle problems, while wet processes are difficult to achieve uniform mixing.

Method used

By forming a eutectic mixture of uranyl nitrate hexahydrate and plutonium nitrate pentahydrate or thorium nitrate hexahydrate with urea, and then preparing micro-uniform MOX fuel powder through deammoniation, denitrification and reduction steps, the process is simplified, waste liquid generation is reduced, and conventional equipment can be used.

Benefits of technology

The process achieves uniform mixing of MOX fuel powder, simplifies the preparation process, reduces production costs, and improves production efficiency. The prepared powder has good chemical composition uniformity, is suitable for different reactor types, and is both economical and safe.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN119153143B_ABST

Patent Text Reader

Abstract

The present application relates to a kind of preparation methods of reactor MOX fuel powder, comprising the following steps: by mixed actinide salt and urea solid preparation mixed actinide eutectic, mixed actinide eutectic is directly obtained by deamination, denitrogenation / decarbonation, reduction, MOX fuel powder;When the mixed actinide salt is uranyl nitrate hexahydrate solid and thorium nitrate hexahydrate solid, the MOX fuel powder is (U x Th 1‑x )O2;When the mixed actinide salt is uranyl nitrate hexahydrate solid and plutonium nitrate pentahydrate solid, the MOX fuel powder is (U x Pu 1‑x )O2.The method provided by the present application directly uses uranyl nitrate solid and plutonium nitrate / thorium nitrate as raw material, can greatly simplify the preparation process of MOX fuel powder preparation process, reduce the use of process reagent, without any process waste liquid generation, and the obtained MOX fuel powder chemical composition uniformity is good, thereby providing a kind of simple, production efficiency is high, no waste liquid, more economical and green MOX fuel powder preparation method.

Need to check novelty before this filing date? Find Prior Art