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404051 - ČSN EN ISO 15646 - Test opětovným spékáním peletek UO2, (U,Gd)O2 a (U,Pu)O2 | ||
| Název : 404051 - ČSN EN ISO 15646 - Test opětovným spékáním peletek UO2, (U,Gd)O2 a (U,Pu)O2
Označení normy : ČSN EN ISO 15646 Katalogové číslo : 500463 Třídící znak : 404051 Účinnost : 2016-11-01 Věstník : 2016.10 Strany : 20 Převzata :vyhlášením ve Věstníku - v angličtině | ||
| Cena : | 228.00 Kč (DPH= 0%), s DPH= 228.00 Kč | |
| ANOTACE "ČSN EN ISO 15646 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 and (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)." | ||