<P> On June 27 , 1954 , the USSR 's Obninsk Nuclear Power Plant became the world 's first nuclear power plant to generate electricity for a power grid , and produced around 5 megawatts of electric power . </P>
<P> On June 27 , 1954 , the USSR 's Obninsk Nuclear Power Plant became the world 's first nuclear power plant to generate electricity for a power grid , and produced around 5 megawatts of electric power . </P>
when did the first nuclear power plant open
when did the first nuclear power plant open
June 27 , 1954
June 27 , 1954