BS EN ISO 15646:2016
Re-sintering test for UO<sub>2</sub>, (U,Gd)O<sub>2</sub> and (U,Pu)O<sub>2</sub> pellets
| Standard number: | BS EN ISO 15646:2016 |
| Pages: | 16 |
| Released: | 2016-05-31 |
| ISBN: | 978 0 580 90935 1 |
| Status: | Standard |
BS EN ISO 15646:2016
This standard BS EN ISO 15646:2016 Re-sintering test for UO2, (U,Gd)O2 and (U,Pu)O2 pellets is classified in these ICS categories:
- 27.120.30 Fissile materials and nuclear fuel technology
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).