Tea Kettle Failure

The electrical failure caused the operator to not know that the valve was still open, which led to cooling water pouring out of the valve and caused the reactor core to overheat. As a result of all of these things, the instruments that the operators read to know what was happening provided confusing information. The operators could not tell how much coolant was in the reactor core because they didn't

his led to the melting of the fuel and a drastic increase in radioactivity within the reactor coolant.This also resulted in leaks in the coolant system, which led to small amounts of radiation escaping into the environment.[7]

This caused reactors 1 through 3 to go into a meltdown and it created a situation where Japan was on the brink of a major environmental disaster. To fully understand the different events there will be a focus on: factors that caused the meltdown, why this did not impact the other three reactors, the consequences, who is responsible and how these incidents can be prevented in the future. Together, these elements will highlight the underlying effects of this disaster and its impact on the region. ("Fukushima Accident")

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

The operator opened the relief valve to release the pressure in which is in the reactor, while the pressure inside the reactor was decreasing up to the required level due to the improper respond and malfunctioning lead to failure of the valve to close. Not only wrong readings by the engineers, but also an inputting excess amount of computer data lead to the technical failure, the slag in the ongoing analyzing process and immediately human alert was alarmed in the power plant. But this issue as not stopped yet, the core of the reactor was beginning to cook. The incident China syndrome was named since there was the increasing of temperature from 4300 degrees Celsius to 5300degree at which meltdown. Hazardous radioactive gas was exposed all over the plant because of the leaked water from the open valve in an adjacent building. No emergency precaution was taken when the second accident of radioactive gas took place. In the video, there was also a communication error to note down and transfer the report were the problems facing the operators to take the decision quickly. Also, one of the employers found the fault in the explosion theory of co-worker prediction the hydrogen bubble was never a threat, it was a human error. Finally, it was the most devastating incident that was spread in the news all over the world and local people

Without evil, all is well; but what is a ‘well’ but a hole in the ground adequate for drowning in? Too much of a good thing is always a bad thing. For a story to have an effective set of morals, a healthy balance of good and evil is necessary. Without the success of light, and the discipline of dark, a story would convey no teaching. We learn more from the downfall of evil than from the success of light, but we learn most from the devious ways in which evil corrupts the innocent, as the texts referenced imply.

April 25, 1986 was a normal day at the Chernobyl power plant. For weeks, the workers had been planning a routine shutdown to coincide with a test of nuclear reactor four. They were trying to determine how long the turbines would spin and supply power to the main circulating pumps following any loss of main electrical power (“Chernobyl Accident 1986”). This test was needed to verify that the cooling process on the reactor stayed in place even with no power because if

Two days later on November 12th, after all the up-keep was taken care of on the reactor, they tried to start it up again. They were unsuccessful in starting up the reactor, and further investigation revealed a slurry blocking any passage through the pipelines which lead to the reactor. However, slurries were a very common thing during shutdowns. They form when methyl mercaptan reacts with other stagnate chemicals in the pipeline, forming a blockage. To clear this slurry, operators began pumping hot water through the piping to try and break it up. By noon on November 13th, operators deemed they had cleared the slurry. During the hot water pumping, a valve was accidentally left opened, which allowed roughly 2,000 pounds of water to flow into the methyl mercaptan feedline and storage tank. This

A presidential committee was designated to review the accident. After various months the investigators wrote a report, showing an O-Ring seal rupture as the main reason of the explosion. Due to the freezing climate, the ring didn’t expand to hold the seal firm, letting hot vapors to escape.

* These 2 critical errors (withdrawing the rods and slowing the reaction too rapidly) made the engineers incapable of increasing the power within the reactor.

An author from Engineering.com named, The Engineer wrote a fairly descriptive article on the events that took place at Three Mile Island in October of 2006. The Three Mile Island incident occurred on March 27, 1979. Two men were cleaning a clog in an ion-exchange tank using compressed air from a general-purpose air system. There was a water line and another compressed air system that controlled valves in the plant. The Engineer (2006), points out that the 3 systems have similar fittings and a hose was connected between the instrument air system and the water line. This led to a loss of feed water to the steam generators and no way to cool down the reactor. With no way to be cooled, the system

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

Do you know how to make pottery? You make a shape of pottery you want with a clay and put it into the fire, which is temperature of 850 degrees. That smooth clay becomes hard when it goes into the fire. However, if you drop the pottery which goes into the fire once, it will crack. To make the hardest pottery, you put into the fire again and again. This means that the hot fire is significant step to make pottery stronger. Hot fire is like a failure. If people endure the failure and never give up, that weak people will become stronger and successful people. If people are afraid of failure and try to escape, they will not make success like a normal pottery. Failure is a necessary step to be successful because it always gives people a lesson and make them stronger. I could realize this fact from my

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

The causes of the accident was quite complex. In brief, it began with a closed bypass valve, which stopped the water flowing to the secondary main feed water pumps, once the steam generators could not receive water, they stopped and the reactor emergently shutdown. Control rods were inserted into the