Word: airtight
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Dates: during 2010-2019
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...Chilean HEU had been, it becomes radioactive. Twelve hours before the earthquake, the NNSA engineers had overseen the fitting of 1,500-lb. (680 kg) protective impact limiters on the material, designed to shield it from the force of an explosion - or, indeed, an earthquake - and placed an airtight cask around the irradiated uranium. They felt confident the packages would not jostle around and suddenly go critical or leak. But how to get them out of a country in chaos...
There are no librarians on the premises—only staff workers trained in the art of promoting efficiency and preservation. Outside the secured, airtight doors of the storage room, Depository staffer Steve Bertino monitors the facility through a completely computerized system...
...decay as a by-product. Even though a federal law passed in 1998 requires the government to create storage spaces for such waste and to move it off-site, most nuclear power plants in the U.S. still store this waste on-site in steel-reinforced cement silos or airtight water-filled pools. However, such storage methods are supposed to be temporary, and many plants have run out of space. Now, the government absolutely must invest in finding new ways to deal with nuclear waste. We suggest that the U.S. collaborate with other nuclear countries—such as France, which...
However, while climate scientists have built a nearly airtight case that climate change is happening and that manmade greenhouse-gas emissions are the primary cause, the IPCC's error demonstrates that it is still difficult to make tight predictions about the future - especially on a regional or local level...