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Normas ASTM – AENOR
ASTM C1408-98(2004)

ASTM C1408-98(2004)

Standard Test Method for Carbon (Total) in Uranium Oxide Powders and Pellets By Direct Combustion-Infrared Detection Method

Fecha:
2010-12-31 /Historical
Superseeded by:
Significance and Use:

Uranium dioxide is used as a nuclear-reactor fuel. Gadolinium oxide is used as an additive to uranium dioxide. In order to be suitable for this purpose, these materials must meet certain criteria for impurity content. This test method is designed to determine whether the carbon content meets Specifications C 753, C 776, C 888, and C 922.

Scope:

1.1 This test method covers the determination of carbon in nuclear-grace uranium oxide powders and pellets to determine compliance with specifications.

1.2 Gadolinium oxide (Gd2O3) and gadolinium oxide-uranium oxide powders and pellets may also be analyzed using this test method.

1.3 This test method covers the determination of 5 to 500 µg of residual carbon.

1.4 This test method describes an induction furnace carrier gas combustion system equipped with an infrared detector. It may also be applied to a similar instrument equipped with a thermal conductivity detector.

1.5 The preferred system of units is micrograms carbon per gram of uranium (µg/g U).

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords:
carbon content; gadolinium oxide; gadolinium oxide-uranium oxide; impurity content; uranium oxide
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