気体遠心分離によるウラン燃料濃縮

原子力発電のために核分裂性同位体を濃縮する

Energy & Battery Technology Global Industrial Scale $6 billion

概要

Uranium enrichment increases the concentration of the fissile isotope U-235 from its natural abundance of 0.72% to 3-5% for nuclear power reactor fuel. The gas centrifuge process converts uranium oxide (yellowcake) to uranium hexafluoride (UF₆) gas, which is spun in high-speed centrifuges to separate the lighter U-235 from the heavier U-238. Thousands of centrifuges are connected in cascades to achieve the required enrichment. This technology provides fuel for approximately 440 nuclear power reactors worldwide, generating 10% of global electricity.

化学プロセス

Yellowcake (U₃O₈) is converted to UF₆ by reaction with HF and F₂. The UF₆ gas is fed into Zippe-type centrifuges spinning at 50,000-70,000 rpm. Heavier U-238F₆ concentrates at the wall while lighter U-235F₆ concentrates near the axis, separated by countercurrent flow. Each centrifuge achieves a separation factor of 1.3-1.5. Cascades of 1,000-50,000 centrifuges produce 3-5% enriched UF₆, which is converted back to UO₂ for fuel pellet fabrication.

U₃O₈ + 2UO₃ + 18HF + 3F₂ → 6UF₆ + 9H₂O (conversion to UF₆)
Centrifugal separation: ²³⁵UF₆ (lighter) separates from ²³⁸UF₆ (heavier) — mass difference of only 0.86%

原材料

  • Uranium hexafluoride (UF₆) — Conversion of yellowcake (U₃O₈) with F₂ and HF (Feed material for enrichment)
  • Yellowcake (U₃O₈) — Uranium mining and milling (Uranium source (0.72% U-235))

最終製品

  • Enriched UF₆ (3-5% U-235) — Nuclear fuel fabrication for power reactors (LEU (low-enriched uranium) for light water reactors)
  • Depleted uranium (0.2-0.3% U-235) — Radiation shielding, military applications, stored for future use (Tails, stored as UF₆ or UO₂)
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Environmental Impact

Uranium mining generates radioactive tailings and mill waste. Enrichment produces large quantities of depleted uranium (DU) requiring long-term storage. UF₆ is toxic and radioactive. However, nuclear power produces no direct CO₂ emissions and has one of the lowest life-cycle carbon footprints of any electricity source.

安全性の考慮事項

最新のイノベーション

SILEX (separation of isotopes by laser excitation) promises more energy-efficient enrichment.
Accident-tolerant fuels (ATF) with chromium-coated cladding improve nuclear safety.
High-assay LEU (HALEU, 5-20% U-235) is being produced for advanced small modular reactors (SMRs).

生産規模

60000

トン/年

$6 billion

市場価値

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Frequently Asked Questions

What industry uses 気体遠心分離によるウラン燃料濃縮?
気体遠心分離によるウラン燃料濃縮 is used in the energy & battery technology sector at global industrial scale scale.
What process is involved in 気体遠心分離によるウラン燃料濃縮?
Yellowcake (U₃O₈) is converted to UF₆ by reaction with HF and F₂. The UF₆ gas is fed into Zippe-type centrifuges spinning at 50,000-70,000 rpm. Heavier U-238F₆ concentrates at the wall while lighter U-235F₆ concentrates near the axis, separated by countercurrent flow. Each centrifuge achieves a sepa
What is the economic significance of 気体遠心分離によるウラン燃料濃縮?
気体遠心分離によるウラン燃料濃縮 has a market value of $6 billion and annual production of 60,000 tons.
What is the environmental impact of 気体遠心分離によるウラン燃料濃縮?
Uranium mining generates radioactive tailings and mill waste. Enrichment produces large quantities of depleted uranium (DU) requiring long-term storage. UF₆ is toxic and radioactive. However, nuclear power produces no direct CO₂ emissions and has one of the lowest life-cycle carbon footprints of any
What raw materials are used in 気体遠心分離によるウラン燃料濃縮?
The main raw materials include: Uranium hexafluoride (UF₆), Yellowcake (U₃O₈).