Sayano-shushenkaya Hydroelectric Power Station Disaster 1.Introduction 1.1.Brief Dam Description Sayano-Shushenskaya Hydroelectric Power Station was biggest hydroelectric power station ever built in Russia history, and also the sixth biggest in the worth, which is located on the Yenisei River, near Sayanogorsk in Khakassia.[3]The plant operated ten hydro turbines, made total 6,400 MW of output, average annual produced 23.5 TWH,which peaked in 2006 at 26.8TWH. Its arch gravity dam is 246 meters high ,1,066 meters long, and 110 meters of base width. [10]In addition, it was built strong enough to withstand earthquakes of up to 8 on Richter scale. 1.2.Regional Powerhouse Background[3] RusHydro …show more content…
The work had been toughened where no keys available for head gates control room, so metal doors had to be smashed. 2.5.After The Disaster Within first hours after accident, the Ministry of Russian Federation for Civil Defense directed rescuers from across the country to SSH for finding and rescuing survivors.Withing 24 hours, more than 1500 rescue workers arrived and began working. Fourteen survivors were rescued the operation. Rescue teams also used special chemical by helicopters to congeal industrial oil spread to the river, and removed them from water afterwards. Environmental damage caused by these oil spills was minimized. 4 3.Root Cause Investigation 3.1.Unit 2 Turbine Defects After accident, Russia’s Federal Service for Ecological,Technologica, and Nuclear Supervision (Rostekhnadzor) launched an investigation. [2]Official report was released on Oct.3. According to the report, Unit 2 started having problems shortly after its installation due to defects in its seals and shaft vibrations. The cavities and crack on the turbine wheel were completely reconditioned in 2000. [5]Nevertheless, it continued to have problems and underwent further repairs in 2005 and 2009. [4]From January to March 2009, repairs were conducted and new automatic control system was installed as well. On March 16, the repaired turbine
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
The CMA received a follow up stating that everything had been corrected. Another letter was sent from the CMA asking for details in March of 1947. On March 25, 1947 the explosion occurred (Martin 1948). I believe that if someone actually went to inspect these corrections that were made the explosion or the 111 causalities could have been avoided.
ithin minutes of the blast, a massive search-and-rescue effort commenced that included fire, emergency, medical, and law enforcement personnel, as well as a large number of citizens. Citizens and emergency personnel joined together and entered the bombed structure, forming human chains to locate and remove trapped survivors and victims. In fact, throughout this rescue effort, the large outpouring of citizens and agency volunteers astonished veteran rescue workers.
Everything on the west side of the facility stopped working, including the elevators, escalators, message boards, water pumps, video screens the north side of the facility and the central plant.
UMMS staff acted quickly to close the water valve as soon as they discovered the rupture, but not before significant damage had been done to the MRI equipment, drywall, carpet, and tiling. Most notably, the manufacture of the MRI equipment declared the same to be a total loss. UMMS further anticipates that it will undergo significant expenses to replace and appropriately install pipe fittings and gaskets in a manner that comports to the October 2013 contract between UMMS and Skanska.
Three Mile Island Unit 2, located near Harrisburg, PA, had an automatic shutdown, even though the plant’s efficiency level rated about 100 percent. On March 28, 1979, one of the reactor pumps, used to supply cooling water, stopped operating, causing an automatic shutdown. This triggered an
Recently, Play-Well and CPSC received 800 reports from concerned parents and consumers that the vehicle's electrical components malfunctioned and overheated during us and parked. It caused 100 fires, and a dozen children to suffer minor burns to their hand, legs, and feet. Furthermore, the fires cost $250,000 worth of property damage, but Michael Hayes, Vice
Overall, all four unit belts, gears, and wirings are in great working conditions. With the exception of a single F631 incident, coin inside note recycler at BA-00408, all 4 devices worked flawlessly during Friday night event. Meanwhile, below are a few opportunities for user training, certified technician training, hardware and software upgrades.
At 4 a.m., the plant failed on the non-nuclear section. A mechanical or electrical failure prevented water to flow to the steam generators that remove heat from the reactor core. This caused the secondary plant’s turbine generator and reactor to shut down which quickly made the pressure of the primary system increase. The primary system was the nuclear portion of the plant. In order to
Why were rescue efforts hampered in the first 24 hours? Their backup generator flooded. Communication device were useless. 3/4 of the police force came in to
On July 19, 1989 United flight 232, a DC-10 aircraft took off from Denver’s Stapleton International Airport on route to Chicago’s O’Hare International Airport. The DC-10 aircraft was manufactured by McDonnell Douglas. It has three General Electric CF6-6 engines, two that were wing mounted and one that was tail mounted. The number two engine, located on the tail, had a pre-existing defect introduced when it was manufactured. It was known as a hard alpha inclusion which causes cracks to form early in the lifetime of the fan disks. However, the cracks were too small to detect by the naked eye and overtime grew to a size large enough to bring the plane down on that fatal day.
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 tiny speck of plutonium-239, as little as three millionths of a gram, can cause lung cancer. One pound of plutonium-239 contains enough specks to kill nine billion people instantly” (Pringle 26). Plutonium-239 is a human-made element, also known as the most dangerous substance on earth. As a by-product of uranium fission, plutonium-239 is created by generating electricity from nuclear sources. Contrary to popular belief, nuclear energy is hazardous and threatening to health. The use of nuclear energy should be banned as evidenced by the number of accidents, health effects, and global impact.
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
As of March 28, there were still 217 vessels and 2,349 personnel working on cleaning up the spill. 3,474 kilometres of containment and absorbent boom were deployed against the spreading oil slick on August 2nd. 411 in-situ burns conducted (which burned 265,450 barrels of oil) and 1.4 million barrels of liquid waste collected.