Chemistry and Physics of Nuclear Fuels

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Course objectives

While the thermal, mechanical and neutronic properties of nuclear fuels and associated materials are covered in most common textbooks and nuclear engineering courses, the areas of inorganic and physical chemistry are often neglected or explained by rules of thumb that have proven useful for traditional reactor systems. With the ongoing development of new reactor types, unorthodox fuel materials, non-aqueous coolants and higher operating temperatures, it will be necessary to have a proper understanding of the principles and mechanisms governing the changes in and reactions between materials under extreme conditions and in untested combinations. This course aims to bridge the gap between basic university-level chemistry and advanced treatises on some particular aspect of nuclear fuel chemistry.

General theory and its application on nuclear materials will be interleaved throughout the run of the course. Since the participants may have varying need to refresh some concepts fundamental to the course, such as different nuclear reactor designs and basic university chemistry, those parts will largely be in the form of self-studies. The lectures will center on how such knowledge can be complemented and extended to deal with less common materials under non-standard conditions and explain complex physico-chemical processes in the reactor core. Following this course, you will learn how to:

  • estimate miscibilities and solubilities of materials
  • evaluate the thermo-chemical properties of advanced fuels
  • predict chemical reactions between materials in the core
  • correlate manufacturing parameters with fuel properties
  • determine mechanical and thermal stresses and limits for fuel rods
  • calculate corrosion potentials
  • combine fuels, clads and coolants properly for use in novel reactor types
  • identify major safety issues that emerge with increasing burn-up
  • calculate yields and purities in refining and reprocessing

The necessary training of calculation skills will be performed in group as well as in the form of home assignments. Lectures and texts will be in English only.
Passing the course typically means that you have attended 50 hours of meetings, and spent 150 hours on group assignments, exercises and reading.

Meeting head-lines

  1. Actinide chemistry and uranium production
  2. Overview of fuel types and coolants
  3. Conventional and advanced fuel materials
  4. Solid solutions and composites
  5. Thermodynamics and transport
  6. Manufacturing methods
  7. Property changes during burnup
  8. Fundamental electrochemistry
  9. Corrosion
  10. Fission products and minor actinides
  11. Separation techniques and reprocessing

Examination

To pass the course you should, as far as possible, participate in all course meetings. Besides the lectures there will be exercises and problem solving in class and as home assignments. These will count towards your grade. If you cannot attend a meeting, report this in advance, and you will receive a corresponding individual assignment.

You are further required to, in pairs or alone, compose and present a lecture going into more depth on one out of a selection of topics covered during the course. At the end of the course there is a written examination, technically composed of two separate parts.

Pre-requirements

  • Basic knowledge on the design and working principles of nuclear reactors.
  • Knowledge of inorganic and physical chemistry corresponding to introductory course at university level.

Registration

  • It is strongly recommended that students intending to take the course contact the teacher a couple of weeks before the first lecture. This is especially important for students who are not formally registered for the course.
  • Study materials helpful in preparing for the course are sent out a few weeks before the start of the course. These can not be provided in advance to unannounced students, putting them at a certain disadvantage.
  • The booking of lecture rooms of appropriate size requires that the number of students is known.
  • If the number of students is very small (typically less than five), the course may be cancelled that year.

Literature

Due to the comprehensive nature of this course, some basics are covered in a course compendium, "The Chemistry and Physics of Nuclear Fuels", while the specifics on each topic will be found in separate reference texts, essays, book chapters, research papers and tables handed out during the course.

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Fre 22 sep 13:00-15:00 Räknestuga

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