...species from around the area where the spill happened have been deemed contaminated and unsafe for consumption, with large meaty fish such as tuna and salmon being amongst the biggest carriers of radiation. Japan has stopped the export of all possibly contaminated goods and the FDA is also monitoring products that are entering the United States for possible radiation. The danger does not end there however; the radioactive element called cesium has been recorded in fish and crustaceans as far as the California Pacific Coast. It was projected that “the debris plume likely will reach […] California beaches and the beaches of British Columbia, Alaska, and Baja California within three years” (Eugene, Upton 2014) of the incident. Not surprisingly, three years later the state of the Pacific Ocean is of much more concern to both consumers and fishermen, as more and more fish that are caught off the Pacific Coast in the United States are turning up radioactive. Consequently, this contamination of radioactive materials is also affecting the atmosphere, as cesium can be found in rain water as well. This means it is likely the United States food supply has also been affected. On April 11, 2011, The California Department of Public Health took samples of vegetation from the Cal Poly Dairy Farm in San Luis Obispo to be tested for Fukushima Daiichi radiation. These samples, however, were not tested until January 6, 2012, yet high levels of both...
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...Name: ________________________ Hour: ____ Date: ___________ Chemistry: Half-life Directions: Solve each of the following problems. Show your work, including proper units, to earn full credit. 1. The half-life of cesium-137 is 3.2 years. If the initial mass of a sample of cesium-137 is 1.0 kg, how much will remain after 151 years? 2. Given that the half-life of carbon-14 is 5730 years, consider a sample of fossilized wood that, when alive, would have contained 24 f of carbon-14. It now contains 1.5 g of carbon-14. How old is the sample? 3. A 64-g sample of germanium-66 is left undisturbed for 1.5 hours. At the end of that period, only 2.0 g remain. What is the half-life of this material? 4. With a half-life of 28.2 years, how long will it take for 1 g of strontium-90 to decay to 125 mg? 5. Cobalt-60 has a half-life of 5.3 years. If a pellet that has been in storage for 26.5 years contains 14.5 g of cobalt-60, how much of this radioisotope was present when the pellet was put into storage? 6. A 1000 kg block of phosphorous-32, which has a half-life of 14.3 days, is stored for 100.1 days. At the end of this period, how much phosphorous-32 remains? 7. A sample of air from a basement is collected to test for the presence of radon-222, which has a half-life of 3.8 days. However, delays prevent the sample from being tested until 7.6 days have passed...
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...present day. A few more studies have been done there and result was submitted to International Atomic Energy Agency for review in 1995. Scientist advised during 1968 that radiation level is very low on the island and it is safe to move back and live the life, and bikinians moved back to the island in 1970. The natives have told by the scientist that it is safe to drink water, air is safe and surface to atolls are safe but after living there for 5 years people started to getting sick. Atomic Energy commission learned that radiation risk was mainly from the food sources such as locally grown fruits, vegetables and coconut crabs which retained high level of radioactivity. The studies revealed the lingering contamination because the radioactive cesium was present in the soil of the plants and it was unhealthy to eaten by any human. At that time residents were given different advised to eat different kind of food that is not contaminated by radiation. When tests were done on bikinian, it showed very high level of radiation in their...
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...Policy Eric Zoppi 3279672 2 December 2013 On March 11th, 2011 the Tōhoku earthquake and the resulting tsunami wreaked havoc upon Japan. Unfortunately, this natural disaster resulted in the largest nuclear disaster since Chernobyl, as the tsunami crippled the Tokyo Electric Power Company (TEPCO) Fukushima Daiichi Nuclear Power Plant. Following this severe breach in security, numerous radioactive isotopes and radioactive particles were released into the environment, specifically the Pacific Ocean and the surrounding air/atmosphere, thus contaminating groundwater, soil and seawater, as well as effectively shutting down a myriad of Japanese fisheries. The ocean and air mainly came in contact with high levels of Iodine-131, Cesium-137, and Cesium-134, as well as lower levels of Tellurium, Uranium, and Strontium, which were concentrated closer to the surrounding area of the nuclear power plant. However, the impact that these radioactive materials will have upon the United States, in particular, has caused quite the national controversy. Despite heavy national acceptance of the occurrence of the disaster, two popular and opposing hypotheses have formed as a result of the Media’s lack of focus on recent analyses of the impending effects of Fukushima Disaster upon the U.S.: (1) the radioactive material that leaked as a result of the TEPCO nuclear power plant failure will not have a drastic, threatening effect on the United States, specifically the West Coast, due to the supposedly...
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...radioactive decay rose threatening not to be handled by the containment structures at the plant (Eisler 17). Water exposed to high levels of radiation threatened to damage the containment structure due to hydrogen build up. With damage to the containment structure, the environment was at high risk of full blown radiation contamination. The danger posed by the accident was the accident was the spread of radioactive contamination to water or the environment that the nearby residents came into contact with. This is why the Japanese government budgeted close to $14 billion for the radiation clean up and immediate relocation of residents (Eisler 29). One of the isotopes still found in the accident site is Cesium-137 that decays according to the following equation 55Cs^137 --> 56Ba^137 + -1e^0. The isotope could lead to development of acute radiation syndrome in humans that affects the skin, digestive system and hair (Loveland et.all 45). Cancer can develop as a result of not receiving appropriate radiation treatment. Nuclear energy is a safe way of producing energy if the right protective measures are taken. In fact, history implies that it rarely causes deaths or illness compared to other methods of producing energy such as using...
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...the nuclear power station at Chernobyl in Ukraine, former Soviet Union. A devastating amount of radioactive material was released into the environment. 30 kilometres around the plant around the plant was closed after the accident. About one hundred fifteen thousand people were evacuated around 1986 and in the following years, about two hundred thousand more were also forced to vacate. Sadly, the problem did not end there. Three years after the incident, the International Atomic Energy Agency (IAEA) assessed the situation around the Chernobyl. Toxic metals and radioactive emission like iodine, cesium-137, plutonium and strontium were found in the plants, soil and even animals. Ever since 1991, the Canadian Nuclear Association also noted that there is a sudden increase in the rate of thyroid cancer. This is happened because cesium-137 or radioactive cesium, with a mass number of 137, has the capability to enter the food chain and can be delivered around an internal dosage of radiation before it can be metabolically eliminated. To prevent this from spreading, livestock were only fed plants that are uncontaminated or plants that cannot accumulate heavy metals. After that, a method was introduced to clean the soil from the toxins. This is called Phytoremediation, which was coined by Dr. Ilya Raskin from the Rutger’s University’s Biotechnology Center for Agriculture and the Environment. Phytoremediation came from the Greek word phyto which means plant, and the Latin word remedium...
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...resultant power surge caused an immense explosion that detached the 1,000-ton plate covering the reactor core, releasing radiation into the atmosphere and cutting off the flow of coolant into the reactor. * A second explosion then, of even greater power than the first blew the reactor building apart and spewed burning graphite and other parts of the reactor core around the plant, starting a number of intense fires around the damaged reactor and reactor number 3, which was still operating at the time of the explosions. * Killed two plant workers, who were the first of several workers to die within hours of the accident. Health Effects * Radiation released from the failed nuclear reactor was from iodine-131, cesium-134 and cesium-137. * Twenty-eight of the workers at Chernobyl died in the four months following the accident * Within three months of the...
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...Hydropower and Nuclear power Theresea Duplesis SCI 207 Dependence of Man on the Environment Gayle Leith February 13, 2012 At a time when our country needs to focus on not only domestic energy production, and ways to improve it, it also needs to find ways to create jobs. We have found that hydropower can play a critical role in doing both, by providing us with clean renewable energy while also helping to expand the job opportunities in rural America. (Tipton, 2012) Hydropower has already been found too serve a number of purposes, one it can produce renewable and emission-free energy. This in turn can be used to pump water or sell electricity to the grid. It also tends to help hydropower developers to pay for aging infrastructures and the modernization of water/power facilities. It also helps with creating local jobs and generating revenue for the Federal government. (Tipton, 2012) Legislation has been trying to find ways to streamline the regulatory process and to reduce administration costs. (Tipton, 2012) Developers have found that hydropower is one of the cheapest and cleanest sources of electricity. Even though, “Hydropower has been found to be the highest source of non-carbon emitting energy in the world.” It still only accounts for 75% of the United States total renewable electricity generation. (Tipton, 2012) Nevertheless, because of many unnecessary regulations that stand in their way only a few of the western...
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..."Complete analyses of inherited influences to natural populations could make the information available and desirable to forecast retrieval times for wild groups at Fukushima as well as any sites of upcoming nuclear coincidences," Mousseau said. "There is a vital need for larger investments in simple scientific research of the wild creatures and plants of Fukushima." (Genetic Association, 2014) The damage of the Fukushima Daiichi nuclear power plant in March 2011, instigated by volcanic activity and succeeding a tsunami, gives rise to massive radioactive contamination of the Japanese continental. In November 2011, the Japanese Science Ministry said that the long-lived radioactive cesium had contaminated 11,580 square miles (30,000 sq km) of the terrestrial surface of Japan. (AJW by The Asahi Shimbun, 2011) Some 4,500 square miles (an area nearly the size of Connecticut) and was found to have radiation echelons that surpassed Japan’s allowable exposure rate of 1 mSV (millisievert) per...
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...choice but to open the unfiltered vents to release the pressure from the reactor (Bunn / Heinonen, 2011). Overall the disaster was a series of safety failures, equipment failures and nuclear meltdown which all resulted in the release of radioactive materials into the environment. Consequences of contaminated soil Soil containing radioactive isotopes is particularly concerning to humans in the immediate area. Due to the agricultural aspect of Fukushima, farming was affected in Japan and risk of contaminated crops and live stock was high which in turn caused widespread panic and had the potential to lead to malnutrition (Nakanishi, 2013). The radioactive isotopes of greatest concern in a nuclear power meltodwn are Iodine 131 and Caesium 137. Iodine 131 has a half-life of eight days, meaning half of it will have decayed after eight days, and half...
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...It has since been revealed that up to 2.4 million pounds of mercury were “lost” to the environment, and radioactive cobalt-60 was found in the soil beneath the laboratory over 30 years after the Manhattan Project’s heyday.9 One study found evidence of radioactive cesium-137 from the Y-12 plant traveling 80 miles down to Chattanooga. It is difficult to determine exactly how many deaths have occurred due to late effects of radiation leakage from Oak Ridge, but the leukemia mortality rate in the area has reached at least 63 percent higher than the expected...
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...Essay Plan I. Introduction: Thesis statement: Therefore, even though there may be some concerns in terms of safety and waste disposal, it could be an advisable option for countries to focus more on developing nuclear energy because it is environmental friendly and cost-effective. II. Body 1. Concerns A. Safety 1. Nuclear radiation on residents (e.g. Chernobyl & Fukushima disaster) → threat health and lives of residents 2. Nuclear radiation on workers→ cancer A. Waste disposal 1. Deep Geologic Disposal (difficult to build, 30-60 years) → few constructed storages for nuclear waste 2. Difficult to safely transport (e.g. Goiania) 2. Benefits C. Environmental friendly 1. Less carbon dioxide → mitigate greenhouse effect 2. No polluting gases → mitigate air pollution D. Cost-effective 1. Little nuclear fuel → much energy → effective 2. Lower unit price of nuclear power → economic III. Conclusion Benefits ( environmental friendly & cost-effective) > concerns ( safety & waste disposal) → develop nuclear energy (1157 words) With the rapidly increasing population, human being’s demand for energy has become more urgent. Around the world, the finite fossil fuels are the main sources of energy. 85% of world energy are currently provided by fossil fuels which have the dominate position compared to other energy sources (Foris, 2005, p. 615). The author also states that 90% of carbon...
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...Nuclear Reactor Power Plant Control Systems Mechatronics Professor 13 October 2013 Table of Contents Heading Page # Introduction History Safety Control Systems Coolants Pressurizer Moderator Control Rods Regulations Disposal Conclusion Works Cited Introduction Control systems are an integral part of the nuclear reactor and without the implementation of an effective control system along with constant monitoring and maintenance catastrophic accidents will occur. This report will introduce the important control systems found in many of the most common nuclear reactors along with an explanation on how they work and how they're implemented. First we must go back into the histories to gain a better understanding of why these control systems are so important and consequences that resulted when control systems are not implements or not used properly. History To know the history of nuclear power plants, one must first understand what a nuclear power plant is. A nuclear power plant is very similar to that of any other steam-electric power plant, in that water is heated and the steam from the water turns turbines, thus creating electricity. The major difference is how the power plant generates heat. The source of the heat from nuclear power plants comes from nuclear fission, rather than from coal, oil or gas. In 1934, a physicist by the name of Enrico Fermi conducted the first experiments that resulted...
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...Fear: Do We Control It, Or Does It Control Us? TLJ Honors Psych Fear: Do We Control It, Or Does It Control Us? Abstract Fear is the mind's way of responding to both physical and emotional danger. It has vast effects on an individual's psychological state, and is directly controlled by the amygdala. Fear is a necessary defense, because without it we would not protect ourselves from legitimate threats. Traumas and bad experiences can trigger emotional fears. Though it seems nowadays, we play into these fears -- fears that are not at all life threatening-- all too often allowing them to become irrational fears. Since the beginning of time there has always been an instilment of fear in our minds, whether the fear was that of eating the 'Forbidden Fruit' , to local legends like Slenderman, and even the bizarre idea of a robotic coup de' etat. The only difference between these fears, is how strongly we let them affect us psychologically. Do we allow our fears to be spoon-fed to us by society and the media? Are we completely irrational when it comes to some of these fears? What is the correlation between our fears of the past and those of the present? Finally, what will the future of mankind hold? All of these factors play a major part in understanding the affects fear can have on society as a whole. Keywords: Fear, Irrational, Media, Past, Present, Future Fear: Do We Control It, Or Does It Control Us? Since the dawn of time...
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...Elemental Geosystems, 5e (Christopherson) Chapter 1 Foundations of Geography 1) Geography is described as A) an Earth science. B) a human science. C) a physical science. D) a spatial science. Answer: D 2) The word spatial refers to A) the nature and character of physical space. B) items that relate specifically to society. C) things that are unique and special. D) eras of time. Answer: A 3) A principal methodology governing geographic inquiry A) is behavioral analysis. B) involves spatial analysis. C) uses chronological organization. D) is field work. Answer: B 4) Which of the following best describes the current emphasis in the field of physical geography? A) understanding soil development B) modeling economic interrelationships among countries C) studying weather D) understanding how Earth's systems interact to produce natural phenomena Answer: D 5) Which of the following most accurately characterizes the goal of geography? A) the production of maps B) memorization of the names of places on world and regional maps C) memorization of the imports and exports of a country D) understanding why a place has the characteristics that it does Answer: D 6) Which of the following terms...
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