Patent · US Active

Fuel pellet

US11335468B2 · kind B2 · utility

0Cited by

2References

14Claims

0Family size

Assignee

Westinghouse Electric Sweden AB · SE

Inventors

Simon Middleburgh · Västerås, SE
Mattias Puide · Hagfors, SE
Lars Hallstadius · Visby, SE
Magnus Limbäck · Västerås, SE
Paul Blair · Västerås, SE

Key dates

Filing date	Jun 10, 2019
Grant date	May 17, 2022
Priority date	—
Expiry date	Jun 10, 2039

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E30/30
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A uranium oxide fuel pellet having an inner region and an outer rim region about the inner region, and that the fuel pellet is cylindrical and the inner region and outer rim region are coaxial cylindrical regions. The outer rim region has an excess of oxygen in comparison to the inner region, wherein high burnup structure (HBS) formation will be suppressed or delayed. Preferably, the excess oxygen is obtained by a chemical treatment by immersing the pellet in hydrogen peroxide (H2O2) or potassium permanganate (KMnO4) in solution.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.