FUEL ELEMENTS: BASIC TYPES
Since the very beginning, different types of fuel elements have been developed. Over the years, for each reactor type a particular fuel design evolved which can be considered today as a standard fuel element.
The fuel elements of Pressurized Water Reactors PWR and Boiling Water Reactors BWR are heavy metallic constructions. The fuel is enclosed in thin-walled zirconium alloy tubes of about 4 m length and of 10 mm diameter, the so-called fuel rods.
Even for complex constructions, the shape of the fuel containing components can be reduced to a few simple basic geometries
It is our objective to use the same simple geometries for complex fuel elements with ceramic cladding:
- cylindrical compacts and small cylindrical capsules