nuclear reactor decay heat 6 percent coolant circulation

A shut-down nuclear reactor still produces a lot of heat

More Than 6% Of Normal Heat

Stopping nuclear fission does not immediately stop a reactor from producing heat. Radioactive materials continue to decay, initially producing more than 6% of the reactor's normal heat. Cooling must continue or the fuel can overheat and melt.

Greek settlement spread through colonization

A shortage of good farmland in mainland Greece helped drive large-scale colonization. Between 800 and 400 BC, Greek settlement spread over roughly ten times as much land, while the population grew from about 800,000 to as many as 7.5–10 million.

Ancient epic poets could build long stories from reusable lines

The Iliad and Odyssey contain many recurring phrases and repeated lines. Scholars studying oral traditions showed how performers could use familiar verbal formulas to compose and remember enormous narratives. Repetition was not necessarily a flaw or careless copying. It was part of the technology of storytelling before texts were routinely fixed in writing.

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nuclear reactor decay heat 6 percent coolant circulation

A shut-down nuclear reactor still produces a lot of heat

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