Regulators are putting the design of nuclear reactors slated to be built in the U.S. under additional scrutiny following the March disaster at Japan’s Fukushima Daiichi nuclear plant. Related Links: Searching for Clues in Quake-Maddened Seas Japan's Tsunami Debris Offers Wealth of Data Nuclear Rebirth On May 20, the Nuclear Regulatory Commission released a statement that Westinghouse must resolve design issues around the shield building of the AP1000, as well as the peak accident pressures expected within containment. The NRC is expected to conduct additional review of the design at the end of May, and that Westinghouse would submit additional
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.