Using new strategies to produce enriched uranium from natural uranium for research reactors fuel

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Mirmohammadi S.L.; Safdari S.J.; Mallah M.H.

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Journal Paper

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Journal: Journal of Nuclear Science, Engineering and Technology Year:2025 | Volume:46 | Issue:1 Page(s): 96-105

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Information Journal Paper

Title

Using new strategies to produce enriched uranium from natural uranium for research reactors fuel

Author(s)

Mirmohammadi S.L. | Safdari S.J. | Mallah M.H. | Issue Writer Certificate

Keywords

Optimized tapered cascades

Optimized square cascades

Optimized squared-off cascades

Fuel of research Reactors

Particle Swarm Optimization Algorithm (PSO)

Abstract

This paper aims to produce uranium with 20% enrichment for research reactor fuel directly from natural uranium with waste xw≤0.3% through a cascade. This purpose has utilized five strategies, including single-optimized tapered, square, 2-section squared-off, 3-section squared-off, and 4-section squared-off cascades. To design and optimize the cascades, five software codes, "STC-PSOA," "SQC-PSOA," "2SQC-PSOA," "3SQC-PSOA," and "4SQC-PSOA," have been developed, with the PSO optimization algorithm employed for optimization. In the first strategy, it is not possible to achieve uranium with a 20% enrichment level using one arrangement and one step. The maximum product enrichment level attainable is 3.73%. However, in the other four strategies, uranium with a 20% enrichment level can be produced in two separation steps with a single arrangement. Notably, when employing the strategy of using 4-section squared-off cascades, the product production is 11.1%, 3.1%, and 1.0% higher compared to square, 2-section, and 3-section squared-off cascades, respectively.

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