|SUBJECT:||M.S. Thesis Presentation|
|TIME:||Friday, July 17, 2015, 11:00 a.m.|
|PLACE:||Boggs Building, 3-47|
|TITLE:||Silicide fuel swelling behavior and its performance in I2S-LWR|
|COMMITTEE:||Dr. Bojan Petrovic, Co-Chair (NRE)
Dr. Abderrafi Ougouag, Co-Chair (INL)
Dr. Chaitanya Deo (NRE)
The swelling mechanisms of U3Si2 under neutron irradiation in reactor conditions are not unequivocally known. The limited experimental evidence that is available suggests that the main driver of the swelling in this material would be fission gases accumulation at crystalline grain boundaries. The steps that lead to the accumulation of fission gases at these locations are multiple and complex. However, gradually, the gaseous fission products migrate by diffusion . Upon reaching a grain boundary, which acts as a trap, the gaseous fission products start to accumulate, thus leading to formation of bubbles and hence to swelling.