I recently attended a Bob Dylan concert and found myself thinking about how times have changed. Back when he first became famous, few people were talking about protecting the environment. Now "green" issues have become important to many and Socially Responsible Investing (SRI) has become a part of our investment planning at Warren Ward Associates. One of the interesting things about SRI, and "green" issues in general, is that different people have different definitions of what’s acceptable and what’s not. Today, I’m thinking about future sources of our country’s electricity and more specifically, the potential acceptability of nuclear power to environmentalists.
Coal-fired generators supply most of America’s electricity and they are our least expensive source of power. Coal is our country’s most abundant energy source, so mining more of it and building more coalfired generators might conceivably reduce our dependence on imported oil. Yet, mining and burning coal are both relatively messy operations and most advocates of environmentally-conscious energy are not interested in adding to our coal usage. We must be practical, though. Our ever-increasing use of electrical devices means that more electrical power must somehow be made available. With coal considered environmentally unacceptable and hydrogen fuel cells a long way off, people have begun to re-evaluate nuclear power’s role in our energy future.
Although no new nuclear power plants have come on line in the US since 1996, some recent changes by the US government are making it easier for utility companies to add nuclear capacity. The Nuclear Regulatory Commission has streamlined its application process and Congress passed a range of subsidies to encourage nuclear power generation. As a result of these changes, the NRC anticipates receiving about two dozen new applications for review over the next year or so, the first ones in thirty years.
In operation, nuclear power is clean and perhaps more environmentally friendly than coal. Reactors heat water into steam which then turns turbine generators. Since the day-to-day by-product is simply water vapor, most environmental concerns relate to one of two issues: potential catastrophic failure or the need to safely store the spent nuclear materials. Reactors have been extensively redesigned over the past thirty years and current versions are considered by many to be safe.
Stewart Brand, who published The Whole Earth Catalogue in 1968, is one of our country's original environmentalists, a visionary thinker whose ideas are still worth considering. In a recent issue of "The Economist", Mr. Brand shared that he has reversed his original (in his words, "knee-jerk") opposition to nuclear power, having decided that global warming is the major environmental issue facing the world today and that nuclear power offers a way to supply the world’s increasing power needs in a "low-carbon" manner. He goes on to offer what seems to be a very original thought – that we don’t need to worry about how to store spent nuclear fuel for 10,000 years or more but for just 100 years. Since it still contains a considerable amount of energy, it only has to be kept safe until a future generation comes up with a way to harvest that energy through new technology, similar to the way improved engineering now allows our cars to go farther on a gallon of gasoline.
Back in the late 60’s, Mr. Brand suggested that people attempt to live "off the grid", separating themselves from much of society, and – perhaps – its ills. That is still the goal of many environmentalists who believe that numerous small and widely distributed power plants would be the ideal solution to meet our growing need for energy. Unfortunately, not all distributed power is green (i.e. home-sized gasoline powered generators) and not all green power can be widely distributed (i.e. a windmill farm large enough to be practical). If you decide to remove yourself from the grid, then you have to plan for the highest possible peak energy need, leaving excess capacity until the hottest day next summer. This is the same issue which faces our energy companies today – operating efficiently regardless of the demand for power but being sure there is always enough available.
In many ways, storing energy is harder than generating it. Recent attempts to do so by pressurizing underground caverns and spinning flywheels at extremely high speeds are clearly beyond practical application by individuals. Storing energy in batteries seems obvious but power is lost in both the charging/discharging cycles as well as during the conversion from DC to AC. Until both generation and storage can be easily distributed, some fuel must fill our ever-growing need for electricity.
Resolving an issue this controversial may require that each side back away from extreme positions and try to negotiate a solution which is at least acceptable to the other. Along the lines of "a good plan today is better than a perfect plan tomorrow", perhaps increased use of nuclear power can help us bridge the energy gap until a large network of smaller power plants can be developed and brought on line.
