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Shutdown is the state of a nuclear reactor when the fission reaction is slowed significantly or halted completely. Different nuclear reactor designs have different definitions for what "shutdown" means, but it typically means that the reactor is not producing a measurable amount of electricity or heat and is in a stable condition with very low reactivity.
One of the main criticisms of cold fusion was that deuteron-deuteron fusion into helium was expected to result in the production of gamma rays—which were not observed and were not observed in subsequent cold fusion experiments. [44] [128] Cold fusion researchers have since claimed to find X-rays, helium, neutrons [129] and nuclear ...
Emergency core cooling systems (ECCS) are designed to safely shut down a nuclear reactor during accident conditions. The ECCS allows the plant to respond to a variety of accident conditions (e.g. LOCAs) and additionally introduce redundancy so that the plant can be shut down even with one or more subsystem failures. In most plants, ECCS is ...
Reactor unit 4 is in "hot shutdown", mainly for heating purposes. IAEA Director General Rafael Grossi says that fighting a war around a nuclear plant has put nuclear safety and security in ...
Passive nuclear safety is a design approach for safety features, implemented in a nuclear reactor, that does not require any active intervention on the part of the operator or electrical/electronic feedback in order to bring the reactor to a safe shutdown state, in the event of a particular type of emergency (usually overheating resulting from a loss of coolant or loss of coolant flow).
Safety at the Russian-held Zaporizhzhia nuclear power plant in Ukraine remains precarious but the shift to a cold shutdown of all six reactor units, completed on Saturday, is positive, the U.N ...
The last operating reactor at the Zaporizhzhia Nuclear Power Plant, reactor No. 6, has been safely shut down. Xinhua News Agency via Getty ImagesEnergoatom, operator of the Zaporizhzhia Nuclear ...
The issue was worsened by leaders referring to B-52 sorties as "nuclear strikes", [48] by the increased use of encrypted diplomatic channels between the US and UK, [49] and by the nuclear attack false alarm in September. In response, Soviet nuclear capable aircraft were fueled and armed ready to launch on the runway, and ICBMs were brought up ...