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NUREG-1150 "Severe Accident Risks: An Assessment for Five U.S. Nuclear Power Plants", published December 1990 by the Nuclear Regulatory Commission (NRC) is a follow-up to the WASH-1400 and CRAC-II safety studies that employs the methodology of plant-specific Probabilistic Risk Assessment (PRA).
The Light Water Reactor Sustainability Program is a U.S. government research and development program. It is directed by the United States Department of Energy and is aimed at performing research and compiling data necessary to qualify for licenses to extend the life of America's current 104 electricity generating nuclear power plants beyond 60 years of life.
The NRC reversed its policy, [8] and the PRA methodology became generally followed as part of the safety-assessment of all modern nuclear power plants. In the 1990s, all U.S. nuclear power plants submitted PRAs to the NRC under the Individual Plant Examination program [3] , and five of these were the basis for the 1991 NUREG-1150.
For example, without specifying an uncertainty level, the Japanese regulatory body, the Nuclear Safety Commission issued restrictive safety goal in terms of qualitative health objectives in 2003, such that individual fatality risks should not exceed 10 −6 /year. Then it was translated in a safety goal for nuclear power plants: [2]
A clean-up crew working to remove radioactive contamination after the Three Mile Island accident. Nuclear safety is defined by the International Atomic Energy Agency (IAEA) as "The achievement of proper operating conditions, prevention of accidents or mitigation of accident consequences, resulting in protection of workers, the public and the environment from undue radiation hazards".
A number of factors have led to increased pressure on the economic viability of the current fleet of nuclear power plants. The age of the existing 104 nuclear power plants means that the licenses of most need to be extended. Most of the nation's first wave of nuclear power plants came on-line between 1956 and the Energy Reorganization Act of 1974.
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On February 9, 2012 Jaczko cast the lone dissenting vote on plans to build the first new nuclear power plant in more than 30 years when the NRC voted 4–1 to allow Atlanta-based Southern Co to build and operate two new nuclear power reactors at its existing Vogtle nuclear power plant in Georgia. He cited safety concerns stemming from Japan's ...