Definitions - std3028

DOE-STD-3028-2000

5.2

Definitions

Chemical reaction of a 233U-bearing material (e.g., fluoride,

Conversion to Oxide

metal, or active oxide) to produce a stable uranium oxide.

Design Pressure

A characteristic of a sealed container which indicates its

ability to withstand internal pressurization. In the language of

the ASME Boiler and Pressure Vessel Code, it is the

"Maximum Allowable Working Pressure."

Drying

A heating process to remove adsorbed water or decompose

hydrated compounds.

Engineered Materials/

Nuclear reactor fuel components (high-fired ceramic pellets,

pins, plates, assemblies, etc.) consisting of 233U-bearing

Fabricated Fuel

material manufactured and maintained with a very high

quality and quality assurance.

Free Gas Volume

That portion of the sealed package that is available to the fill

gas and any gases generated during storage. See Appendix

B for further discussion.

Irradiated Fuel

Nuclear material, including Fabricated Fuel, that in its existing

form, has been subjected to irradiation in a nuclear reactor or

accelerator and that consequently delivers an external

radiation dose, and requires special containment and

handling.

Loss-on-Ignition (LOI)

Mass loss measured after a weighed stabilized sample is

heated in air for at least one hour to a material temperature in

excess of the specified material stabilization temperature and

high enough to drive off residual volatiles. This test

measures any further weight change due to residual volatile

species and verifies that the material has been stabilized.

Material Temperature

The lowest temperature within a mass of heated material. In

other words, all of the material is at or above this

temperature.