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Advanced Sodium Fast Reactor Accident Source Terms: Research Needs

Technical Report ·
DOI:https://doi.org/10.2172/1097212· OSTI ID:1097212
 [1];  [2];  [3];  [4];  [5]
  1. Advanced Nuclear Energy Programs, Albuquerque, NM (United States)
  2. IRSN/DPAM.SEMIC, Saint-Paul-lez-Durance (France)
  3. The Ohio State Univ., Columbus, OH (United States)
  4. Japan Atomic Energy Agency (JAEA), Oarai (Japan)
  5. Institute for Energy Petten, Saint-Paul-lez-Durance (France)
+ Show Author Affiliations
An expert opinion elicitation has been used to evaluate phenomena that could affect releases of radionuclides during accidents at sodium-cooled fast reactors. The intent was to identify research needed to develop a mechanistic model of radionuclide release for licensing and risk assessment purposes. Experts from the USA, France, the European Union, and Japan identified phenomena that could affect the release of radionuclides under hypothesized accident conditions. They qualitatively evaluated the importance of these phenomena and the need for additional experimental research. The experts identified seven phenomena that are of high importance and have a high need for additional experimental research: high temperature release of radionuclides from fuel during an energetic event, energetic interactions between molten reactor fuel and sodium coolant and associated transfer of radionuclides from the fuel to the coolant, entrainment of fuel and sodium bond material during the depressurization of a fuel rod with breached cladding, rates of radionuclide leaching from fuel by liquid sodium, surface enrichment of sodium pools by dissolved and suspended radionuclides, thermal decomposition of sodium iodide in the containment atmosphere, and reactions of iodine species in the containment to form volatile organic iodides. Other issues of high importance were identified that might merit further research as development of the mechanistic model of radionuclide release progressed.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
DOE Contract Number:
AC04-94AL85000
OSTI ID:
1097212
Report Number(s):
SAND--2010-5506; 463562
Country of Publication:
United States
Language:
English

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22 GENERAL STUDIES OF NUCLEAR REACTORS
54 ENVIRONMENTAL SCIENCES