Apparatus for oxidizing Pu(iii) to Pu(iv) in a feed solution
By using a continuous oxidation reactor, the problems of large size and safety of oxidation equipment have been solved, the stability and safety of the oxidation reaction have been achieved, plutonium loss has been reduced, maintenance operations have been simplified, and nuclear criticality accidents have been avoided.
CN122177532APending Publication Date: 2026-06-09CHINA NUCLEAR POWER ENGINEERING CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA NUCLEAR POWER ENGINEERING CO LTD
- Filing Date
- 2026-02-03
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
Existing oxidation equipment is large, unsafe, and difficult to maintain. It also suffers from plutonium loss and slag clogging, which affects the stability and safety of the spent fuel reprocessing process.
Method used
A continuous oxidation reactor is adopted, including an oxidant supply unit, a feed liquid supply unit, an oxidation unit, and a tail gas absorption unit, to achieve continuity and safety of the oxidation reaction and avoid plutonium loss and slag clogging caused by packing materials.
Benefits of technology
It has achieved stable and safe operation of the oxidation reaction, reduced plutonium loss, simplified maintenance operations, avoided nuclear criticality accidents, and improved equipment utilization and safety.
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Figure CN122177532A_ABST
Abstract
This invention discloses an apparatus for oxidizing Pu(III) in a liquid feed to Pu(IV), comprising: an oxidant supply unit; a liquid feed unit; an oxidation unit connected to both the oxidant supply unit and the liquid feed unit, including a continuous oxidation reactor and a storage tank, wherein the continuous oxidation reactor is located within the storage tank and the material overflows from the continuous oxidation reactor into the storage tank; and a tail gas absorption unit connected to the storage tank. The liquid feed unit, oxidation unit, and tail gas absorption unit are located in a glove box or a heated chamber. This invention achieves long-term, continuous, stable, and safe operation of the oxidation of Pu(III)-containing liquid feed, as well as miniaturization, less plutonium mass loss, effective control of the critical mass of plutonium, and control of heat generation per unit time within the equipment, effective gas-liquid separation, and easy discharge of the generated gas.
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