X-Ray Imaging Calibration for Fuel-Coolant Interaction Experimental Facilities Christophe Journeau, Michael Johnson, Shifali Singh, Fréderic Payot, Ken-ichi Matsuba, Yuki Emura and Kenji Kamiyama EPJ Web Conf., 253 (2021) 06005 Published online: 19 November 2021 DOI: 10.1051/epjconf/202125306005