The present article reviewed the step-by-step attempts on debris characterization after severe accident of Fukushima-Daiichi Nuclear Power Station (FDNPS). It was rather difficult to investigate reactor inside in first few years. Distribution degraded core materials, i.e. fuel debris, investigated by a muon tomography and damaged status preliminarily predicted from analysis. In parallel, litera...

In order to improve the reliability of tripping solenoid valve and switching steam turbine in nuclear power plant reduce abnormal closing. According working principle valves plant, this paper designs a kind electromagnetic sealing test system, including base, measurement control system hydraulic system. The detection is an offline By simulating real load condition tightness tested valve. actual...

1. Throughout its 52-year history nuclear power has been mainly used in industrialized countries. Of the world’s 441 currently operating nuclear power reactors, 403 (or 91%) are in either OECD countries or countries with economies in transition. In terms of electrical generating capacity, 349 GW(e) out of 368 GW(e), or 95% of nuclear generating capacity is installed in these countries. In terms...