Pellet models (IMAGE) DOE/Oak Ridge National Laboratory Caption Pellet injection scientist Trey Gebhart shows plastic models of different sized pellets he is testing for ITER's shattered pellet injection system. The larger pellet is the size to be used at ITER, while the smaller represents pellets currently in use. Credit ORNL Usage Restrictions None. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.