Standard Test Method for Determination of Hydrogen (total from all sources) in Mixed Oxide ((U, Pu)O2) Sintered Pellets by the Inert Gas Fusion Technique Followed by Thermal Conductivity Measurement

Importancia y uso:

5.1 MOX is used as a nuclear-reactor fuel. This test method is designed to determine whether the hydrogen mass fraction of the pellets meet the requirements of fuel specification. Examples of these requirements are given in Specification C833. Other requirements may apply based on agreements between the supplier and the customer.

5.2 This method is suitable for all sintered MOX pellets containing a PuO₂ mass fraction of ≤15 %, when the UO₂ and PuO₂ meet the requirements of Specifications C753 and C757. The method uncertainty is related to the mass fraction of the hydrogen in the sample. At lower mass fractions, the relative uncertainty increases. At a hydrogen versus elemental U+Pu mass fraction specification limit of 1.3 μg/g, the combined relative uncertainty at the 95 % confidence level (k = 2) is approximately 30 %.

Subcomité:

C26.05

Volúmen:

12.01

Número ICS:

27.120.30 (Fissile materials and nuclear fuel technology)

Palabras clave:

hydrogen content; impurity content; mixed oxide; MOX; plutonium oxide; uranium oxide;