Re-sintering test for UO2, (U,Gd)O2 and (U,Pu)O2 pellets

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-05-2016

Publisher

British Standards Institution

Foreword
1 Scope
2 Brief description of procedure
3 Incidents
4 Apparatus
5 Reagents
6 Sampling
7 Procedure
8 Evaluation
9 Precision of the procedure
10 Test report
Annex A (informative) - Relationship between pellet
mass evolution and O/M ratio evolution
Bibliography

Explains a procedure for measuring the densification of UO[2], (U,Gd)O[2], and (U,Pu)O[2] pellets, achieved by heat treatment under defined conditions.

This International Standard describes a procedure for measuring the densification of UO₂, (U,Gd)O₂, and (U,Pu)O₂ pellets, achieved by heat treatment under defined conditions.

The densification of fuel in power operation is an important design feature. Essentially, it is dependent on structural parameters such as pore size, spatial pore distribution, grain size, and in the case of (U,Gd) O₂ a nd (U,Pu)O₂, oxide phase structure. A thermal re-sintering test can be used to characterize the dimensional behaviour of the pellets under high temperature. The results of this test are used by the fuel designer to predict dimensional behaviour in the reactor, because thermal densification in the reactor is also dependent on these structural parameters, albeit in a differing manner in terms of quantity.

On the assumption of the prediction, it is necessary to correlate the results of this test by some correlation rules, because the results of this test vastly depend on the re-sintering conditions (such as heat treatment temperature, treatment time, gas content, and partial oxygen pressure).

Committee	NCE/9
DevelopmentNote	Renumbers and supersedes BS ISO 15646. 2016 version incorporates corrigendum to BS ISO 15646. Supersedes 12/30254328 DC. (05/2016)
DocumentType	Standard
Pages	16
PublisherName	British Standards Institution
Status	Current
Supersedes	BS ISO 15646 : 2014 12/30254328 DC : 0

Standards	Relationship
EN ISO 15646:2016	Identical
ISO 15646:2014	Identical

ISO 9278:2008	Nuclear energy - Uranium dioxide pellets — Determination of density and volume fraction of open and closed porosity
ISO 3369:2006	Impermeable sintered metal materials and hardmetals Determination of density

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BS EN ISO 15646:2016

Re-sintering test for UO2, (U,Gd)O2 and (U,Pu)O2 pellets

Table of Contents

Abstract

Scope

General Product Information

International Equivalents

Standards Referencing This Book

Category

Subcategory