High-Burnup Fuel Rods Undergo Destructive Testing for Enhanced Nuclear Power Efficiency

Strategic Insights -

Researchers at Pacific Northwest National Laboratory (PNNL) are conducting a comprehensive study on high-burnup fuel rods, a crucial component in nuclear reactors, to improve their efficiency and extend their operation time. The fuel rods, manufactured by Global Nuclear Fuel (GNF), have been engineered to withstand longer operating cycles, reducing the need for frequent reactor shutdowns and enhancing the overall safety and economics of nuclear power generation. The tests, funded by the Department of Energy's Accident Tolerant Fuel program, aim to provide valuable insights into the performance of these advanced fuels, which could support a potential power uprate of existing light water reactors and contribute to the nation's goal of realizing a fuller nuclear potential.

Key Takeaways:

  • Eleven high-burnup fuel rods manufactured by Global Nuclear Fuel (GNF) have been delivered to Pacific Northwest National Laboratory (PNNL) for destructive testing.
  • The fuel rods, designed to handle longer operating cycles and improve fuel cycle economics, were tested in a 60,000-pound stainless-steel cask over a 14-month period.
  • The study aims to understand the impacts of additional time in the core on fuel and cladding performance and will inform the development of higher efficiency fuels.
  • The high-burnup fuel design is the same as the one planned for use in the GE Vernova Hitachi Nuclear Energy BWRX-300 small modular reactor.
  • The examination of these rods is the next step in developing higher efficiency fuels that are safer and more reliable.
  • The work is funded by the DOE Office of Nuclear Energy's Accident Tolerant Fuel program.
  • The development of this fuel could support the Trump Administration's executive order to facilitate five gigawatts of power uprates at existing power plants by 2030.
  • The destructive testing has included puncturing the cladding on the fuel rod inside a hot cell, capturing the released gases to understand internal pressure, and studying the impacts of additional time in the core.
  • Debris generated from the disassembly of the rods will be used to train scientists who develop technology to detect and monitor nuclear activities.
  • The PNNL's Radiochemical Processing Laboratory (RPL) provides a unique opportunity for conducting this research, allowing researchers to perform different tests in the same space.

Statistics:

  • Eleven high-burnup fuel rods were delivered to PNNL for testing.
  • The cask containing the fuel rods weighed 60,000 pounds.
  • The cask was transported over a 14-month period.
  • The fuel rods were manufactured at GNF's Wilmington, N.C., facility.
  • The rods spent two operating cycles in the core of a boiling water reactor.
  • The assemblies were licensed by the Nuclear Regulatory Commission for use as "high-burnup lead use assemblies."
  • The goal is to extend fuel cycle lengths for the BWRX-300 from 36 to 48 months.
  • The development of this fuel could support five gigawatts of power uprates at existing power plants by 2030.

Sources:

  • American Nuclear Society (ANS)
  • Pacific Northwest National Laboratory (PNNL)
  • Global Nuclear Fuel (GNF)
  • GE Vernova
  • Hitachi, Ltd.
  • DOE Office of Nuclear Energy's Accident Tolerant Fuel program
  • National Nuclear Security Administration's Nonproliferation Stewardship Program
  • Nuclear Regulatory Commission (NRC)