
The Green River Basin in the western United States is home to vast oil shale resources.
“In a new report, the Natural Resources Defense Council (NRDC) warns about the dangers of producing transportation fuel from oil shale, a crude oil alternative that has not yet been commercially developed in the United States. The study, Driving It Home: Choosing the Right Path for Fueling North America’s Transportation Future, explores the economic viability and potential environmental impacts of extracting oil from shale and presents a range of other energy and policy options. Written in conjunction with Western Resources Advocates and the Pembina Institute, the report also focuses on the implications of developing transport fuel from two other controversial sources: tar sands and coal.
Oil shale—sedimentary rock that contains a petroleum-like substance called kerogen—is found in great quantities in the western United States, particularly in the Green River Basin spanning portions of Colorado, Utah, and Wyoming. According to Bobby McEnaney, a public lands advocate at NRDC, there are two main ways to extract the kerogen from the shale. The first, an “ex-situ” process, involves mining the shale in an open-pit or underground mine, crushing it, and then distilling it at temperatures exceeding 800 degrees Fahrenheit. The other method, which remains largely unproven, is an “in-situ” process whereby heaters are placed in the ground to liquefy the kerogen in place. The liquid can then be extracted using current oil well technology and sent to a refinery to be processed.
The U.S. Energy Policy Act of 2005 requires the Department of Interior to promote research and development of oil shale resources and to establish a commercial leasing program, accelerating the potential commercialization of the fuel source. The Bureau of Land Management (BLM) has already set aside three separate 160-acre (65 hectare) tracts of land for research activities, and plans to hold a sale of commercial oil shale leases by the end of 2008. However, data from any research projects—including information on the environmental and social impacts and economic viability of the resource—would likely not be available by the time the commercial leases are offered.
Studies conducted so far suggest that oil shale extraction would adversely affect the air, water, and land around proposed projects. The distillation process would release toxic pollutants into the air—including sulfur dioxide, lead, and nitrogen oxides. Existing BLM analysis indicates that current oil shale research projects would reduce visibility by more than 10 percent for several weeks a year. And NRDC states that in a well-to-wheel comparison, greenhouse gas (GHG) emissions from oil shale are close to double those from conventional crude, with most of them occurring during production. According to the Rand Corporation, producing 100,000 barrels of oil shale per day would emit some 10 million tons of GHGs.
The BLM reports that mining and distilling oil shale would require an estimated 2.1 to 5.2 barrels of water for each barrel of oil produced—inputs that could reduce the annual flow of Colorado’s White River by as much as 8.2 percent. Residues that remain from an in-situ extraction process could also threaten water tables in the Green River Basin, the agency says.
NRDC notes that the infrastructure needed to develop oil shale would impose equally serious demands on local landscapes. The group warns that impressive arrays of wildlife would be displaced as land is set aside for oil shale development. And it says that while open pit mining would scar the land, in-situ extraction would require leveling the land and removing all vegetation.
In addition to the environmental impacts of oil shale, vast amounts of energy are required to support production. In Driving it Home, NRDC cites Rand Corporation estimates that generating 100,000 barrels of shale oil would require 1,200 megawatts of power—or the equivalent of a new power plant capable of serving a city of 500,000 people. Proponents of oil shale have a stated goal of producing one million barrels of the resource per day.
So far, large-scale oil shale projects have not yet been started in the United States, and the BLM is still drafting its environmental impact study. The public examination and comment period is scheduled to begin this summer. Unless oil shale development receives considerable government support, the industry is not expected to be economically viable. According to the Denver Post, the oil company Shell recently withdrew its application for a mining permit for an oil shale research and development lease, citing economic reasons.”
Beezer here. Compare the ugliness of shale with the following nuclear power development called a ‘pebble bed’ reactor. It’s being developed in China, a country of 1.3 billion people growing at double digit rates which needs to grasp every energy straw to continue growing. From the Wired blogsite.
“Known as China’s MIT, Tsinghua University sprawls across a Qing-dynasty imperial garden, just outside the rampart of mirrored Blade Runner towers that line Beijing’s North Fourth Ring Road. Wang Dazhong came here in the mid-1950s as a member of China’s first-ever class of homegrown nuclear engineers. Now he’s director emeritus of Tsinghua’s Institute of Nuclear and New Energy Technology, aka INET, and a key member of Beijing’s energy policy team. On a bright morning dimmed by Beijing’s ever-present photochemical haze, Wang sits in a spartan conference room lit by energy-efficient compact fluorescent bulbs.
“If you’re going to have 300 gigawatts of nuclear power in China – 50 times what we have today – you can’t afford a Three Mile Island or Chernobyl,” Wang says. “You need a new kind of reactor.”
That’s exactly what you can see 40 minutes away, behind a glass-enclosed guardhouse flanked by military police. Nestled against a brown mountainside stands a five-story white cube whose spare design screams, “Here be engineers!” Beneath its cavernous main room are the 100 tons of steel, graphite, and hydraulic gear known as HTR-10 (i.e., high-temperature reactor, 10 megawatt). The plant’s output is underwhelming; at full power – first achieved in January – it would barely fulfill the needs of a town of 4,000 people. But what’s inside HTR-10, which until now has never been visited by a Western journalist, makes it the most interesting reactor in the world.
In the air-conditioned chill of the visitors’ area, a grad student runs through the basics. Instead of the white-hot fuel rods that fire the heart of a conventional reactor, HTR-10 is powered by 27,000 billiards-sized graphite balls packed with tiny flecks of uranium. Instead of superhot water – intensely corrosive and highly radioactive – the core is bathed in inert helium. The gas can reach much higher temperatures without bursting pipes, which means a third more energy pushing the turbine. No water means no nasty steam, and no billion-dollar pressure dome to contain it in the event of a leak. And with the fuel sealed inside layers of graphite and impermeable silicon carbide – designed to last 1 million years – there’s no steaming pool for spent fuel rods. Depleted balls can go straight into lead-lined steel bins in the basement.
Wearing disposable blue paper gowns and booties, the grad student leads the way to a windowless control room that houses three industry-standard PC workstations and the inevitable electronic schematic, all valves, pressure lines, and color-coded readouts. In a conventional reactor’s control room, there would be far more to look at – control panels for emergency core cooling, containment-area sprinklers, pressurized water tanks. None of that is here. The usual layers of what the industry calls engineered safety are superfluous. Suppose a coolant pipe blows, a pressure valve sticks, terrorists knock the top off the reactor vessel, an operator goes postal and yanks the control rods that regulate the nuclear chain reaction – no radioactive nightmare. This reactor is meltdown-proof.
Zhang Zuoyi, the project’s 42-year-old director, explains why. The key trick is a phenomenon known as Doppler broadening – the hotter atoms get, the more they spread apart, making it harder for an incoming neutron to strike a nucleus. In the dense core of a conventional reactor, the effect is marginal. But HTR-10′s carefully designed geometry, low fuel density, and small size make for a very different story. In the event of a catastrophic cooling-system failure, instead of skyrocketing into a bad movie plot, the core temperature climbs to only about 1,600 degrees Celsius – comfortably below the balls’ 2,000-plus-degree melting point – and then falls. This temperature ceiling makes HTR-10 what engineers privately call walk-away safe. As in, you can walk away from any situation and go have a pizza.”
Beezer again. Smaller, safer nuclear power. And more dispersed too so a country doesn’t have to rely on mega nuclear plants and all their costs and risks. Hope the US can develop its own version. Otherwise, as in so many other areas, China will beat us to the finish line–and the profits.