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There was a cooling system malfunction at TMI-2, which resulted in a loss of coolant accident (LOCA) that damaged the nuclear core. Compounding the event was an apparent failure to trust instinct when some of the water level gauges malfunctioned. The biggest problem, however, was the lack of an adequate emergency plan, resulting in partial public panic and an unnecessary partial evacuation. Another problem was that the design of the radiation instrumentation did not anticipate the actual levels, making the actual levels uncertain.

Post accident analysis reveals that about 43,000 curies of 85Kr were released, and that about 20 curies of 131I were released. Due to atmospheric dispersal, however, no significant impact was experienced by the public. For further discussion of off-site impact, please see the Related Link below.

Two major changes occurred in policy following the incident. First, intermediate and high range radiation monitoring equipment was mandated, so that no conceivable evolution could place the instrumentation off-scale high. In fact, some of this equipment is so high range that, if they really were pegged off-scale high, you would be safer on the moon without a spacesuit. Suffice to say, its not going to happen. Second, and more importantly, was the requirement for a fully integrated emergency plan and drills to exercise that plan. The issue here is full transparency and trust.

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5mo ago

The Three Mile Island accident occurred in 1979 when a partial meltdown of a reactor core resulted in the release of radioactive gases into the environment. While there was no direct fatalities from the incident, it led to increased concerns about nuclear safety and had long-lasting impacts on the nuclear industry in the United States.

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Q: What happen in three mile island?
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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.


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.


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.


Why is three mile island nuclear plant called three mile island?

The Three Mile Island nuclear plant is named after the island in the Susquehanna River located three miles downstream from the state capital of Pennsylvania, Harrisburg. This is the location of the nuclear power plant that suffered a partial meltdown in 1979.


Who was president during Three Mile Island?

Jimmy Carter was the President of the United States during the Three Mile Island nuclear accident in 1979.


Did three mile island blowup?

Yes.


Where The Three Mile Island nuclear plant located?

The Three Mile Island nuclear plant is located in Londonderry Township, Pennsylvania, United States.


In what state is Three Mile Island located?

Pennsylvania