Budny 4:00 L11 ETHICAL IMPLICATIONS OF NUCLEAR POWER AND COAL IN THE APPALACHIAN MOUNTAINS Claire Gillman (cdg31@pitt.edu) INTRODUCTION: THE RISE OF NUCLEAR POWER IN COAL COUNTRY As the world’s population passes seven billion and countries continue to develop new technology and infrastructure at a rapid rate, the need for a clean, renewable energy source that is efficient and safe grows larger. In the United States alone, the Department of Energy has forecast that domestic electricity demand will increase 30% in the next 25 years [1]. Out of the many options for sustainable energy such as solar power, wind turbines and geothermal technology, nuclear power stands out. Nuclear power plants do not require large amounts of space or rely on the weather like solar power, and they produce more megawatts of electricity per dollar than any other kind of clean energy source [1]. I am a lead nuclear engineer at Westinghouse, a large company that designs plants and fabricates parts for many types of nuclear reactors, including nuclear power plants. As nuclear power becomes a more popular energy source around the world, our nuclear engineering sector has experienced huge growth. Recently, Westinghouse has expressed strong interest in a contract to build a large pressurized water nuclear power plant in West Virginia, an area that has historically been very active in the mining of coal for the purpose of making electricity. This would be a multi-million dollar, long-term project for the company that would bring carbon-free electricity to thousands of homes throughout the Appalachian Mountains and would also significantly reduce the region’s dependency on coal. In the past decade, West Virginia and Kentucky have supplied more than 20% of coal mined in the United States [2]. Coal mining was and still is an integral part of the culture and history of West Virginia, but it is also needlessly destructive to the environment and local communities. As the production of nuclear power is carbon free, it is a more sustainable practice than the surface mining that is currently practiced in the region. However, nuclear power produces radioactive waste that has to be stored for thousands of years, and there is currently no perfect solution for storage or disposal [3]. Both options affect the environment in different ways. As a nuclear engineer, it is my job to not only help with the development of new energy technologies but also to consider the ethical implications of my actions and how they affect the rest of the world. MOUNTAINTOP REMOVAL MINING University of Pittsburgh, Swanson School of Engineering 1 Submission Date 2013-10-29 The primary method of coal mining in Appalachia is mountaintop removal mining (MTR), where the coal seams are mined by removing the land that covers the seam, effectively leveling the existing mountains [2]. After removing the coal, excess rock is dumped back onto the site of the former mountain or, as happens more frequently, deposited in nearby valleys and streams, called “valley fills” [2]. The environmental and community health effects of MTR in the Appalachian region have been extensively studied over the past 30 years. The general scientific consensus is that MTR has a myriad of negative environmental effects including but not limited to habitat destruction, deforestation, decreases in biodiversity, poor water quality and increases in airborne pollution [4]. Surface mining has also been linked to increased rates of cancer, depression, birth defects and respiratory diseases in mining communities [4]. The installation of this multi-reactor nuclear power plant would provide carbon-free power to thousands of residents and businesses in the area, significantly reducing the need for destructive MTR surface mining. ETHICAL DILEMMAS However, there are two ethical dilemmas that the construction of this power plant will bring up. First, presently there is no perfect waste management solution to dispose of the radioactive spent fuel rods and used uranium that are produced as a part of the nuclear reaction cycle. These rods remain radioactive and harmful to the environment for thousands of years, and have to be stored somewhere in order to not pose a threat to humans, animals or the water supply. Since the rise of nuclear power in the 1960s, nuclear engineers and scientists have examined many possible storage solutions for high level radioactive waste, including but not limited to outer space disposal on satellites, ocean floor disposal, synthetic concretes, storage inside the Earth’s crust, and geologic storage sites in mountains or cliffs [5]. The most viable of these options are deep geologic disposal at sites like Yucca Mountain, Nevada, where the waste is stored deep underground in controlled environments, and deep borehole disposal, where the radioactive material is injected into kilometers-deep wells which are then sealed with rock and cement [5]. Currently, spent radioactive material from power plants is kept in large concrete-and-steel dry casks that are filled with inert gas and sealed to prevent leaks [1]. While dry cask storage does not pose an immediate environmental threat, it is not a long-term solution that will allow nuclear power to become a globally accepted “green” energy source. Claire Gillman One of the biggest concerns that comes with the use of any nuclear technology is radioactivity and its effects on people and the environment. As shown by the 1986 Chernobyl disaster in Ukraine, where wide swaths of land still lay abandoned and uninhabited because of the high levels of radioactivity more than 25 years after the accident, fallout from nuclear power plants can have a permanent, measured effect on its surroundings if it is not properly stored and managed [3]. For this reason, many leading nuclear experts believe that underground storage at geologic sites in mountains or underground is one of the most viable current options for nuclear waste disposal. the radioactive material and then sealed up. Opponents of geological disposal at Yucca Mountain argue that the nuclear waste is not significantly contained in geological sites because it is still relatively close to the surface and therefore poses a risk to communities [1]. With deep borehole disposal, this risk to humans is significantly reduced because the holes would be drilled to a depth of two kilometers or more, putting more than a mile of the Earth’s crust between the fuel rods and human habitation and isolating the waste in case of any leaks or spills [8]. The U.S. Nuclear Waste Technical Review Board, a government regulatory agency that oversees nuclear power production facilities, predicts “each borehole could hold between 100 and 200 metric tons (MT) spent nuclear fuel (SNF), so 10 to 20 boreholes could contain the approximately 2,000 MT SNF discharged from U.S. nuclear power plants each year”[8]. In addition to large storage capacity, multiple locations throughout the US have the appropriate geological foundation for borehole drilling, making site scouting less difficult than it is for geological repositories [1]. Borehole disposal’s relatively small geographic footprint and isolation from human activity make it an attractive solution to the nuclear waste problem, but significant engineering challenges do exist. Current drilling technology for very deep holes is still in the early stages and can be slow and expensive [5]. In addition, more research and engineering is required to develop an appropriately robust borehole seal that will isolate the radioactive material from pressure changes, extreme temperature, weather, earthquakes and other geological events [8]. Regardless, deep borehole disposal shows potential as a viable storage option for the US and other countries in the near future. Because these storage technologies are not perfect, nuclear engineers must always consider the risk of failure, and what could happen. WASTE DISPOSAL TECHNOLOGIES Geological Repositories The main goal of deep geological repositories is to contain nuclear waste in a stable, isolated area that will not be disturbed by human activities or natural disasters for the foreseeable future. The spent fuel rods are first placed in canisters made of cast iron and copper to prevent corrosion and leakage [5]. The canisters are then surrounded by a rock and synthetic clay buffer to separate the groundwater around the storage site from any potential radioactive contamination [6]. Scientists are currently searching for the optimal mix of buffer ingredients that will protect the canisters from pressure changes, high temperatures, flooding and other random events that could compromise the security of the waste storage site [3]. In the United States, one potential nuclear waste repository site is Yucca Mountain, Nevada, located in the Mojave Desert outside of Law Vegas. The repository would consist of a network of storage tunnels 300 m below the surface and 300 m above the water table to avoid contamination [6]. About the Nevada site, director of the Nuclear Regulatory Commission’s Three Mile Island Cleanup Site Office Lake H. Barrett says: “Built in volcanic rock high above the water table and accessed by gently inclined ramps from the ridge slopes, a Yucca Mountain repository would be ideally situated to serve for monitored geologic storage of spent fuel, which ultimately could be retrieved if, say, fuel recycling should become economically attractive” [7]. Since 1987 when the site was chosen for consideration, Yucca Mountain has been extensively studied as a potential site for nuclear waste storage, with teams of geologists, nuclear engineers, environmental engineers and chemists examining every inch of the site for potential risks [6]. However, the government put the project on hold in 2010 and no progress has been made since [7]. THE ETHICS OF NUCLEAR POWER AND THE ENVIRONMENT While carbon-free nuclear power would be replacing a comparatively less environmentally conscious technology (MTR coal mining), nuclear power still has an effect on the environment that needs to be taken into account when deciding the ethicality of building the power plant. In the National Society of Professional Engineers (NSPE) Code of Ethics, it states that “Engineers shall at all times strive to serve the public interest” and "Engineers are encouraged to adhere to the principles of sustainable development in order to protect the environment for future generations” [9]. In light of the health problems caused by coal mining, I believe that attempting to reduce reliance on coal through the use of alternative sources qualifies as serving the public interest. While nuclear power has its own set of inherent risks, including the safe disposal of radioactive fuel, to me the benefits of cleaner energy and reduced carbon emissions Deep Borehole Disposal An alternative but significantly less well-developed waste containment technology is deep borehole disposal, in which well-like holes are drilled into the Earth’s crust to contain 2 Claire Gillman outweigh the risks and therefore help serve the public interest. In addition, the Code of Ethics of the American Nuclear Society, a nonprofit open to nuclear scientists, engineers and educators, states that engineers should “work to protect the environment,” which implies that engineers have an obligation toward sustainability [10]. Despite the environmental hazards of working with radioactive substances, I believe that it is a far more sustainable energy source than the practice of mountaintop removal mining. Waste disposal technology is rapidly improving as nuclear power grows in countries like India, and as the technology for containing radioactive material improves, arguments against nuclear power diminish. In recent years, many scientists and engineers have been arguing that social justice and sustainability should be included in the list of professional obligations of an engineer [11]. Based on these ethical codes and data about nuclear reactors and the effect of surface mining on the Appalachian region, I believe it is ethical to continue with the construction of the power plant. [5]J. Kim, S. Kwon, M. Sanchez, G. Cho. (16 February 2011). “Geological Disposal of High Level Nuclear Waste.” KSCE Journal of Civil Engineering. (Online article). DOI: 10.1007/s12205-011-0012-8. 721-737 [6]N. Chapman, A. Hooper. (17 October 2011). “The disposal of radioactive wastes underground.” Proceedings of the Geologists' Association. (Online article). DOI: 10.1016/j.pgeola.2011.10.001. 46-63. [7] L. Barrett, L. Carter, K. Rogers. (Fall 2010). “Nuclear waste disposal showdown at Yucca Mountain.” Issues in Science and Technology. (Online article). URL: http://go.galegroup.com/ps/i.do?id=GALE%7CA240623034 &v=2.1&u=upitt_main&it=r&p=AONE&sw=w&asid=01e7 238a022c36ae85621dfe99334748. 80. [8]“Deep Borehole Disposal of Spent Nuclear Fuel and High-Level Waste.” U.S. Nuclear Waste Technical Review Board. (Online report). URL: http://www.nwtrb.gov/facts/BoreholeFactSheet.pdf. 1-3. CONCLUSION: PROMOTING PUBLIC WELFARE THROUGH NUCLEAR ENGINEERING [9] “NSPE Code of Ethics for Engineers.” National Society of Professional Engineers. (2007). Webpage. http://www.nspe.org/Ethics/CodeofEthics/index.html Determining ethical actions in situations involving nuclear power is a complicated affair and engineers must take into account many different factors including impact on the environment, people, and the economy [12]. As an engineer, I feel I have an obligation to promote the welfare of the public and to advance scientific discovery in my field [11]. After examining the consequences of coal mining in West Virginia and the pros and cons of various nuclear waste disposal methods, I have determined that the most ethical course of action is to build the nuclear power plant. [10] “Code of Ethics.” American Nuclear Society. (2003). Webpage. http://www.ans.org/about/coe/ [11] D. Michelfelder, S. Jones. (2011). “Sustaining Engineering Codes of Ethics for the Twenty First Century.” Science and Engineering Ethics. (Online article). DOI: 10.1007/s11948-011-9310-2 [12] W. Abulfaraj, M. Hassan. (2007). “The Teaching and Assessment of Professional Ethics in the Nuclear Engineering Education According to ABET Engineering Criteria.” American Society for Engineering Education. REFERENCES [1] M. Schaffer. (6 December 2010). “Toward a viable nuclear waste disposal program.” Energy Policy. (Online article). DOI: /10.1016/j.enpol.2010.12.010. 1382-1388. ACKNOWLEDGEMENTS I would like to thank my peer advisor Becca Schaefer for giving me some wisdom about this assignment, and my roommate Kim Dickinson for helping me look for typos. I would also like to thank the librarians at Hillman Library who assisted me in accessing online databases, and my writing instructor Dan Mcmillan for his constructive comments on my previous writing assignment that helped me craft this paper. [2] J. Amos, W.Galloway. (2013). “The Overlooked Terrestrial Impacts of Mountaintop Mining.” Bioscience. (Online article). DOI: 10.1525/bio.2013.63.5.7 [3] “Backgrounder on Chernobyl Nuclear Power Plant Accident.” (20 June 2013). United States Nuclear Regulatory Commission. (Web page). URL: www.nrc.gov/reading-rm/doc-collections/factsheets/chernobyl-bg.html [4] M.A. Palmer, E. Bernhardt. (2010). “Mountaintop Mining Consequences.” Science. (Online article). DOI: 10.1126/science.118054 3 Your Name 4