| Autor: |
T.R.G. Kutty, A.K. Sengupta, G.C. Jain, K.B. Khan, Sanjib Majumdar, P.V. Hegde, Joydipta Banerjee, H.S. Kamath |
| Rok vydání: |
2003 |
| Předmět: |
|
| Zdroj: |
Journal of Nuclear Materials. 312:224-235 |
| ISSN: |
0022-3115 |
| DOI: |
10.1016/s0022-3115(02)01643-4 |
| Popis: |
The shrinkage behaviour of ThO 2 , ThO 2 –30%PuO 2 , ThO 2 –50%PuO 2 and ThO 2 –75%PuO 2 pellets has been studied using a dilatometer in inert (Ar) and reducing atmospheres (Ar–8%H 2 ). The effects of dopants of CaO and Nb 2 O 5 on shrinkage of the oxides of the above Pu/(Pu+Th) ratios were also studied. Out of the two dopants studied, CaO was found to give larger shrinkage for all the Pu/(Pu+Th) ratios covered in this study. It was also found that the shrinkage was marginally larger in Ar–8%H 2 than in Ar atmosphere. Addition of PuO 2 to ThO 2 enhanced sintering. This was found to be true for both the dopants. During the sintering of ThO 2 , a prominent peak was observed in the shrinkage curve at around 100–300 °C. This peak was attributed to the pressure increase of the trapped gases which subsequently release at high temperatures. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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