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Basically because a vent valve in the primary circuit was stuck open, and the operators failed to recognise this (in mitigation, the instrumentation was not reliable). This led to partial fuel damage and release of radioactivity.

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13y ago
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5mo ago

The Three Mile Island nuclear accident in 1979 was caused by a combination of mechanical malfunctions and human errors. A stuck valve allowed coolant to escape, leading to a partial meltdown of the reactor core. The situation was exacerbated by operator misunderstandings and equipment failures.

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Q: Why did the three mile island disaster happen?
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Could the three mile island disaster event be prevented?

yes


What year was three mile island disaster?

1979. You call it disaster, and it was for the plant owners as they lost their investment, but it was not in the same class as the Chernobyl disaster, which really was a disaster.


What country did the three mile island accident happen?

The Three Mile Island accident occurred in the United States, specifically in Pennsylvania. It was a partial meltdown of a reactor at the Three Mile Island Nuclear Generating Station in 1979.


Talk about publicity What disaster happened 12 days after the release of the movie The China Syndrome?

Three-Mile Island


In 1989 a tragic environmental disaster occurred in Alaska. what was it The Three Mile Island disaster The Exxon Valdez disaster The Chernobyl disaster The Dust?

The Exxon Valdez disaster was the only one on your list that happened anywhere near Alaska.


The only meltdown in a nuclear reactor to ever happen in the US happen where?

The only nuclear reactor meltdown in the US occurred at Three Mile Island in Pennsylvania in 1979. It was a partial meltdown caused by a combination of equipment failure and human error.


Where and when did the nuclear meltdown at three mile island happen?

The nuclear meltdown at Three Mile Island occurred in Middletown, Pennsylvania, United States on March 28, 1979. It was the most serious accident in the history of the American commercial nuclear power generating industry.


What is a site of a famous nuclear disaster of 1986?

Three mile Island near Harrisburg,PA March 28, 1979


How did three mile island got it name?

Three Mile Island got its name from the nearby Three Mile Island, which is a small island located in the Susquehanna River in Pennsylvania. The island is approximately three miles downstream from the state capitol in Harrisburg.


What media is used in Yvonne Jacquette's Three Mile Island?

Why did Yvonne jacquette draw the three mile island


What radioactive material was released at Three Mile Island?

Krypton-85 (85Kr36) was released at Three Mile Island.


We've all heard of the nuclear accident at Three Mile Island but what state is Three Mile Island in?

Three Mile Island is located in Pennsylvania. It is situated on the Susquehanna River, south of Harrisburg.