ASTM C968-06
Standard Test Methods for Analysis of Sintered Gadolinium Oxide-Uranium Dioxide Pellets

Standard No.

ASTM C968-06

Release Date

2006

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM C968-12

Latest

ASTM C968-19

Scope

The test methods in this method are designed to show whether a given material is in accordance with Specification C 922.

1.1 These test methods cover procedures for the analysis of sintered gadolinium oxide-uranium dioxide pellets to determine compliance with specifications.

1.2 The analytical procedures appear in the following order:

1.3 The values stated in SI units are to be regarded as the standard.

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.

1.4 This test method describes the determination of nitrogen in gadolinium oxide-uranium dioxide pellets (Gd2O 3/UO2). With a 2 to 5-g sample, concentrations from 5 to 100 g of nitrogen are determined without interference.

1.5 The homogeneity of Gd2O3 in UO2 has been cited in Specification C 922 as an important requirement for this fuel form. The uniform distribution of gadolinia in urania will result in up to three components in the pellet: free Gd 2O3, free UO2, and a Gd2O3-UO 2 solid solution. There are a number of ways for assessing uniformity of which the ceramographic method described here may not be the most definitive. This technique has been used over the gadolinia concentration range from 1 to 10 weight %.

ASTM C968-06 history

• 2019 ASTM C968-19 Standard Test Methods for Analysis of Sintered Gadolinium Oxide-Uranium Dioxide Pellets
• 2012 ASTM C968-12 Standard Test Methods for Analysis of Sintered Gadolinium Oxide-Uranium Dioxide Pellets
• 2006 ASTM C968-06 Standard Test Methods for Analysis of Sintered Gadolinium Oxide-Uranium Dioxide Pellets
• 1999 ASTM C968-99 Standard Test Methods for Analysis of Sintered Gadolinium Oxide-Uranium Dioxide Pellets