Accident At Three Mile Island Summary

This research paper discusses the Three Mile Island incident to include what started it, the results in the aftermath, and how it could have been prevented. The Three Mile Island Unit 2 (TMI-2) reactor, near Middletown, Pa., partially melted down on March 28, 1979. This was the most serious accident in U.S. commercial nuclear power plant operating history, although its small radioactive releases had no detectable health effects on plant workers or the public. Its aftermath brought about sweeping changes involving emergency response planning, reactor operator training, human factors engineering, radiation protection, and many other areas of nuclear power plant operations. It also caused the NRC (Nuclear Regulatory Commission) to tighten and

Three Mile Island in Harrisburg, Pennsylvania, contained the most serious commercial nuclear accident in U.S. history. The events that followed taught the U.S. a lesson learned about nuclear power and the damage it can cause. The Three Mile accident paved the way for reforms in the way nuclear power plants were operated and regulated. the location of the island, the accident, the meltdown, the aftermath, and the media circus were all critical points in the lessons learned.

This accident has been, by far the worst nuclear power plant accident within the borders of the United States.However, the studies conducted by governmental groups such as the Nuclear Regulatory Committee (NRC), the Environmental Protection Agency, the Department of Health, Department of Energy, and the State of Pennsylvania as well as numerous independent organizations have deemed that the accident at Three Mile Island had very little, if an at all, effects on the health of the communities surrounding the plant.[8]

First, as mentioned above, failure to mention reactors design flaws led to distrust in the infrastructure of the Soviet Union. While many scientists and researchers such as Valeri Legasov had noticed that there were issues with the reactors design prior to the disaster, and mentioned so in personal journals, the discovery of their failure to speak up lead to the questioning of Soviet leadership [5]. Additionally, these issues became worse upon the discovery of KGB classified documents that discussed various issues with the construction of the Chernobyl plant between 1971 and 1988 [7]. These compounding issues identified flaws

From this incident was any employee disciplined for not following safety procedures. This would establish if the company believes the employees were negligent in their duty.

As humans we want to have a good life, have a home, maybe a family and feel safe. With the advances in industry such as energy production we can have more luxuries which include heat, lights and running water. However, as technology gets bigger and better there will always be risks that can lead to catastrophic outcomes. Luckily for the United States; we did not have a disastrous outcome with a nuclear power plant such as the 1986’s Chernobyl Nuclear Power plant catastrophe, making, ”the Chernobyl disaster the only level 7 incident on the International Nuclear Event Scales (INES) making it the biggest man-made disaster of all time” (List 25, 2014) . Three Mile Island power plants is located near Middletown Pennsylvania. On March 28, 1979, the plant had a partial meltdown. Even though the Three Mile Island power plant incident did not have any adverse health effects, Three Mile Island had an impact on the nuclear industry development and politically in the United States.

This did not mean that the valve had actually performed that action, but rather that the message was received by the valve (History Channel…). The light shut off, which indicated to the operators that the valve had been opened and reclosed, however the valve did not reclose (Wikipedia). The PORV remained open and was releasing a combination of coolant and radioactive material. As coolant water was released, no instrument indicated this to the operators; the operators had only been trained to estimate the amount of water in the reactor by doing calculations based upon pressure readings. These pressure readings were now skewed and thus the calculations were wrong and based upon these wrong calculations, the operators stopped the flow of cooling water to the reactor. The lack of water caused overheating within the reactor and according to the US Nuclear Regulatory Commission’s findings, about half of the reactor’s core melted. Operators had no way of knowing this and also were not trained to handle such an event. Unlike the event at Chernobyl, the reactor stayed intact and massive amounts of radiation were not leaked into the surrounding area. This containment, led nuclear engineer, Jack Herbein to announce publically that the citizens of Harrisburg were in no danger. Herbein’s comments on the plant were near fraudulent because no one was certain as to the actual danger that they were in

Simply, the manger(s) should have conducted audits, supervised actions, and ensured the engineers followed the code of ethics to prevent this incident.

On March 1979, in Harrisburg, Pennsylvania Three Mile Island there were misread gauges and poor decision that lead to the melting of the core reactor. But after the core melted

Events are classified based upon their impacts on people and environment, radiological barriers and controls, and defense-in-depth. Level 7, the highest level, is defined as “an event resulting in an environmental release corresponding to a quantity of radioactivity radiologically equivalent to a release to the atmosphere of more than several tens of thousands of Tera Becquerel’s of I-131.” Level 6, the second highest level, is defined as “releases are in the range of thousands to tens of thousands of Tera Becquerels of I-131. Note that, a release of Cs-137 has to be multiplied by a factor of 40 to be regarded radiologically equivalent to I-131.” [2] Figure 1 lists an event examples of the Three Mile Island accident in 1979, the Chernobyl accident

Countless nuclear power plant accidents have been occurring quite frequently since its invention. Some accidents have even been underestimated,

The disaster took place on April 1986, and was caused by inexperienced staff. When the power plant had to undergo a special test, to make sure that sufficient amount of cooling water would be supplied to the reactor in case of a power outage. However, the test had been delayed, because the national grid required the power output more than the expected time. Hence, the test was postponed after midnight where the night shift had to come. The night shift had little experience about such a test as most of them were electrical engineers rather than nuclear. On the other hand, the night shift had to perform the test before the grid needed the power again, otherwise they would have all been fined or fired. Consequently, lead to an unnecessary pressure on the personnel, which in turn increased the probability of making incorrect

Many critics argue that due to the Three Mile Island nuclear incident that occurred March 28, 1979, in Pennsylvania resulted in a reactor meltdown, with no casualties due to a combination of equipment failure and a lack of operators understanding what to do to a faulty reactor. This incident has put the majority public to have safety concerns over not only the operators working in the plants but also the civilians in the surrounding area. Yet since the accident, the United States formed the National Academy for Nuclear Training to improve training the Institute of Nuclear Power Operations which reviews and accredits nuclear utilities’ training programs for all key positions at each plant. In addition, nuclear energy plants have proven the ability to produce clean electricity without greenhouse gas emissions and the reliability due to its increased efficiency and increased power output.

for unsafe working conditions. On the 24th of April 2013 one of the most catastrophic

Automatic response programs in this plant were very poorly ensured. If the people who were setting the plant cared about the magnitude of the risk they were dealing with they were dealing with; they would have elected automatic shutdown apparatus on the mixing tanks. From the record, the plant did not have any automatic pressure mixing shutdown procedure nor temperature monitors that could be used to prevent situations from being worse.