Standard Test Method for The Determination of Carbon (Total) Content in Mixed Oxide ((U, Pu)O2) Sintered Pellets by Direct Combustion-Infrared Detection Method

Importancia y uso:

5.1 MOX pellets are used as a nuclear-reactor fuel. This test method is designed to determine whether the carbon content of the pellets meet the requirements of the fuel specification. Examples of these requirements are given in Specification C833.

5.2 This method is suitable for all sintered MOX pellets containing a mass fraction of PuO₂ of 12 % or less when the UO₂ and PuO₂ meet the requirements of Specifications C753 and C757. The method uncertainty is related to the mass fraction of the carbon in the sample. At lower carbon mass fraction values, the relative uncertainty increases. At carbon mass fraction values close to the typical carbon specification limit of 100 μg/g, the method relative uncertainty is on the order of 5 %, but exact method performance is difficult to determine due to the lack of a matrix matched certified reference material.

Subcomité:

C26.05

Referida por:

C1865-18

Volúmen:

12.01

Número ICS:

27.120.30 (Fissile materials and nuclear fuel technology)

Palabras clave:

carbon content; carbon mass fraction; impurity content; mixed oxide; MOX; plutonium oxide; uranium oxide;