Towards Decommissioning Fukushima (IMAGE) Kyoto University Caption Compilation of control rod cross-sectional images, showing results of high-temperature steam oxidation. Japanese researchers have mapped the distribution of boron compounds in a model control rod, paving the way for determining re-criticality risk within the reactor. Credit Kyoto University Usage Restrictions Please credit Kyoto University. License Licensed 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.