United Nations nuclear experts have praised Japan for making progress on shutting down the crippled Fukushima plant, but have warned the situation there remains very complex.The 19-strong mission from the International Atomic Energy Agency has been in Japan since last week to examine efforts by Tokyo Electric Power (TEPCO) to contain the site.They have reviewed the management of contaminated water that has been used to cool reactor cores, as well as work on removing spent fuel rods in Reactor No.4.Mycle Schneider, an expert on energy and nuclear policy, comments that the measures are not enough to prevent the risk of another disaster.
