Nuclear fuel rod cladding and method for producing such cladding
The nuclear fuel pencil sheath, featuring a ceramic matrix composite material and an internal lining, addresses the issue of rapid degradation during accidental conditions by enhancing resistance and sealing, thereby reducing the risk of nuclear fuel release.
WO2025083082A1 Publication Date: 2025-04-24FRAMATOME SA
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Patent Information
- Application Number
- PCT/EP2024/079239
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-10-16
- Filing Date
- 2024-10-16
- Publication Date
- 2025-04-24
AI Technical Summary
Technical Problem
Existing nuclear fuel pencil sheaths made from zirconium-based alloys degrade rapidly during severe accidental conditions, such as loss of cooling fluid accidents, leading to hydrogen release, oxidation, and potential rupture, resulting in the release of nuclear fuel.
Method used
A nuclear fuel pencil sheath comprising a tube with a reinforced layer made of a composite material with a ceramic matrix reinforced with ceramic reinforcement fibers, such as silicon carbide, and an internal lining for improved sealing and fission gas retention.
Benefits of technology
The composite material sheath provides enhanced resistance to accidental conditions, reducing the risk of sheath rupture and nuclear fuel release, while maintaining adequate sealing and thermal transfer properties.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to cladding comprising a tube (14) that extends along a longitudinal axis and a tubular inner lining (18) housed inside the tube (14), wherein the tube (14) comprises at least one reinforced layer (16) made of a composite material that comprises a ceramic matrix reinforced with ceramic reinforcing fibres, and wherein the thickness of the tube (14) is between 280 µm and 600 µm.
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