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Instant Release Fractions for Failed Fuel Stored in Deep Geological Repositories

Instant Release Fractions - Evaluating the impact of failure in the event of an accident breaching fuel sheathing and containment vessels

Calculating the radiological inventory that would be released from a fuel matrix, to evaluate the potential impact of failure, in the event of an accident breaching the fuel sheathing and containment vessels.

This project was completed recently for a nuclear organization and involved the following elements: 

  • Review of experimental data on radiological inventories in the grain boundaries available for "instant release"
  • Fuel performance and radionuclide depletion decay data to determine the available inventories
  • Thermodynamic database to determine the Phase A soluability of available radionuclides
  • Determination of the Instant Release Fraction for defined fuel bundle
  • The FEMAXI-VI to simulate fission gas release from CANDU fuel elements
  • ORIGEN to determine and quantify the long-term decay products that would contribute to the Instant Release Fraction
  • Collaborative work with the University of Ontario Institute of Technology to determine the thermodynamic properties of the radionuclides
  • Practical determination of the Instant Release Fraction for CANDU fuel stored in a deep geological repository 

About This Case Study

Industry Sector

  • Generation

Generation Type

  • Nuclear

Nature of Service

  • Waste Management

Client Assets

  • Nuclear Fuel

Tags

  • Radionuclides
  • |
  • Candesco
  • |
  • CANDU
  • |
  • Nuclear Waste Management