Three Mile Island accident
Background
The Three Mile Island Unit 2 (TMI-2) reactor which situated in Dauphin County, Pennsylvania, United States, 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.(1) This incident was rated to 5 of 7 points in International Nuclear Event Scale, higher risks only Chernobyl, Fukushima Daiichi and Kyshtym disaster had,because there was also an impact on human and environment was. (2) The accident began about 4 a.m. on Wednesday, March 28, 1979 when the reactor was operating at 97% power.
The problem was in secondary, …show more content…
Only after 14 years in August 15, 1993, the hard and unstoppable work the cleanup at Three Mile Island Concluded. (5)(6)
Key failures
There were 3 failures that cause such unexpected destructions.
First and main one is “Inadequate instrumentation and training programs at the time hampered operators' ability to respond to the accident.”(7) The plant staff didn’t realise the consequences and actually that didn’t have enough experience in solving such unexpected issues. That was a result of poor training program of that time.
Second, less depending on human problem,but anyway important is the valve problem. The power plant didn’t have the instrument that indicate actual valve position, so workers cannot saw is the device in a proper position as it inform.
Third, quite similar to second failure was caused by indicator that shows how much water were covered the core. So second mistake that plant staff did was wrong prediction of the actual scene in the core.
Lessons learned
Every huge or small failure thought us and gain some experience. It was the worst US accident that took place Three Mile Island nuclear power plant. After that numerous of things were
Background
The Three Mile Island Unit 2 (TMI-2) reactor which situated in Dauphin County, Pennsylvania, United States, 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.(1) This incident was rated to 5 of 7 points in International Nuclear Event Scale, higher risks only Chernobyl, Fukushima Daiichi and Kyshtym disaster had,because there was also an impact on human and environment was. (2) The accident began about 4 a.m. on Wednesday, March 28, 1979 when the reactor was operating at 97% power.
The problem was in secondary, …show more content…
Only after 14 years in August 15, 1993, the hard and unstoppable work the cleanup at Three Mile Island Concluded. (5)(6)
Key failures
There were 3 failures that cause such unexpected destructions.
First and main one is “Inadequate instrumentation and training programs at the time hampered operators' ability to respond to the accident.”(7) The plant staff didn’t realise the consequences and actually that didn’t have enough experience in solving such unexpected issues. That was a result of poor training program of that time.
Second, less depending on human problem,but anyway important is the valve problem. The power plant didn’t have the instrument that indicate actual valve position, so workers cannot saw is the device in a proper position as it inform.
Third, quite similar to second failure was caused by indicator that shows how much water were covered the core. So second mistake that plant staff did was wrong prediction of the actual scene in the core.
Lessons learned
Every huge or small failure thought us and gain some experience. It was the worst US accident that took place Three Mile Island nuclear power plant. After that numerous of things were