HELSINKI—Finland’s much-delayed and costly new nuclear reactor, Europe’s most powerful by production capacity, has completed a test phase lasting more than a year and started regular output, boosting the Nordic country’s electricity self-sufficiency significantly. The Olkiluoto 3 reactor, which has 1,600-megawatt capacity, was connected into the Finnish national power grid in March 2022 and kicked…

The U.S. Nuclear Regulatory Commission (NRC) has certified the design for the first American-designed small modular nuclear reactor (SMR). The NRC issued its final ruling in the Federal Register on Jan. 19 to certify the emissions-free small modular reactor by the Oregon-based NuScale Power, which will take effect on Feb. 21. The final determination prevents the SMR from…

South Korea and Poland have signed initial agreements to build a second nuclear power plant in Poland, as South Korea continues taking steps to revive its nuclear industry and Poland strives for a cheap and stable energy supply. Polish energy companies ZE PAK and PGE signed a letter of intent with Korea Hydro & Nuclear…

BOISE, Idaho—If anyone has a good idea on how to put a nuclear fission power plant on the moon, the U.S. government wants to hear about it. NASA and the nation’s top federal nuclear research lab on Friday put out a request for proposals for a fission surface power system. NASA is collaborating with the…

JERUSALEM—The Israeli military said Thursday that a Syrian missile that reached deep into Israeli territory and set off air raid sirens near the country’s top-secret nuclear reactor was the result of a misfire and not a deliberate attack. The missile landed in southern Israel early Thursday, prompting Israel to respond with airstrikes on the missile…