The core damage now unfolding in as many as four Japanese nuclear reactors after Friday's post-quake tsunami doused back-up cooling system generators is already becoming stock material for nuclear nihilists. Once again nuclear's perennial opponents are out in force hoping to use this episode to beat back nuclear power.
Greenpeace USA is asking its supporters to email the president and Congress with the suggested language "It's time to invest in clean, renewable energy. Not risky and dangerous nuclear power." This weekend Reuters reported on green parties in France, Italy, and Germany hurriedly parlaying Japan's reactors into a new ploy to push their respective governments away from nuclear. "We cannot master nature, nature rules us," Germany's Green Party parliamentary leader told the news agency.
After a partial core meltdown at Three Mile Island (TMI) in 1979, the American nuclear industry stalled out, overcome by NIMBY-ism. The country built one more nuclear reactor after TMI. While TMI injured no one, the accident wrought lasting devastation on the country's prospects for energy independence with its perfect storm of an ill-timed disaster movie and a sea of media misinformation. The University of Texas at Austin co-hosted a lecture and panel discussion last week on energy's portrayal in the movies. Michael Webber, a mechanical engineering professor at the university and an expert in energy and environmental policy, summed it up thusly, according to the event's Twitter feed: "The China Syndrome did for nuclear what JAWS did for sharks."
Thanks to TMI, the United States has long lost much of the manufacturing infrastructure to efficiently build new full-scale gigawatt nuclear power plants. There are two plants under construction in Georgia, the first after this needless moratorium, and they are now so expensive that President Obama needed to approve a $8 billion loan guarantee (of an estimated $14 billion construction cost) so that Southern Company could obtain its financing for the huge project.
We shouldn't allow America's re-emerging nuclear industry to be swallowed up by a wave of misinformation following this devastating tsunami.
Nuclear is a key element of plans to minimize the impact of global warming. At 17 tons of carbon dioxide per gigawatt-hour, nuclear energy production actually emits less CO2 than wind (solar has nuclear beat by three tons per gigawatt hour). For reference, coal emits over 1,000 tons and natural gas over 600 tons for the same amount of energy. Facts like these have already swayed many environmentalists into the pro-nuke camp. Al Gore has carefully teetered on the edge of full-on nuclear support for some time now.
Holdouts refer to "safe energy" rather than "green energy" alternatives, aiming to exclude nuclear energy which towers over the green energy landscape as the most reliable source out there. Safe energy is a semantic trick along the lines of "pro-life," similarly implying a false dichotomy. That's because American-led nuclear design upgrades expected to power grids by 2020 change the terms of debate.
Meet the iNuke: small modular reactors chock full of elegant design innovations, built cheaply, operating efficiently, and buried underground for your protection. One of the most promising and practical designs is from Corvallis, Oregon-based NuScale. They've got the safest reactor design the industry has ever seen, one that's drawing a scrum of serious shoppers as the company prepares to file for Nuclear Regulatory Commission approval next year.
"We think we're approaching a breaking point where plants are getting so complex and so large that it's reflected in cost," Dr. Jose Reyes, NuScale's chief technology officer, told the audience at MIT's Energy Conference this month. Dr. Reyes drew intense interest from his rapt audience of MIT students and energy industry players at the conference's panel on small and medium nuclear reactors. He quickly got swarmed as his panel came to an end. I had to catch up with him later.
The Department of Energy funded Dr. Reyes and his Oregon State University team in 2000 as part of the Nuclear Energy Research Initiative. "We were commissioned to come up with a design that was small, compact and could be built easily," he told me, initially in the hope that it could be used in developing nations. The team built a functional model unit at their university lab as proof of concept, and NuScale used that lab while overhauling their plans into a commercially viable option. They ended up with a product that costs one-third of a traditional nuclear plant.
The NuScale mini reactor carries a risk of core damage of once in 100 million years. To put that expanse into some perspective, 100 million years ago, flowers had yet to evolve, and dinosaurs roamed the earth. It was the height of the Cretaceous period. Peer reviewed science will not back me up on my next assertion, but I think I have a fair shot of spontaneously turning into a porpoise about once in 100 million years.
We really shouldn't be awed by this kind of technological development, as unreal as it must seem to Green partiers everywhere. Japan's tsunami-drenched reactors are 40 years old. In the same time, space flight has evolved from impractical government-sponsored rockets and shuttles to the dawn of Virgin Galactic. Nuclear just slimmed down too.
In this case, about 70 percent of NuScale's reactor design is similar to the most recent iterations of water-cooled enriched uranium reactors that are common worldwide and share a lineage to those in Japan. But a lot of mutation can occur with a 30 percent DNA swap out, and in NuScale's case, all of it points to safer operating conditions.
For one thing, rather than the huge gigawatt reactor of the kind capped by a massive concrete dome, a NuScale plant has up to 12 individual reactors made up of self-contained modules, each immersed in water and encapsulated by steel. The 65-foot long by 14-foot wide modules will be manufactured under controlled conditions at a central factory and shipped to sites, dramatically cutting down costs. Four modules can power the city of Madison, Wisconsin. All twelve can light up the entire metropolitan area of Memphis, Tennessee.
Because a NuScale plant is broken up into self-contained mini reactors of 45-megawatts each, the failure scenarios only pose so much risk, says Dr. Mohammad Modarres, professor of mechanical and nuclear engineering at the University of Maryland and an international leader in the science of probabilistic risk assessment.
Probabilistic Risk Assessments (PRAs) are the most rigorous step for any engineering design, and take months to produce after numerous computer models based data sources like materials analyses. Engineers begin by brainstorming hundreds of possible system failures, searching for any possible way that radiation could find its way into the environment, and then determine a frequency for every conceivable scenario, in the end determining the possible consequences for each outcome. Three Mile Island had just such a PRA, which was highly prescient and laid out a scenario of system and human error virtually identical to what happened there, but the plant's owners and federal regulators didn't heed its warnings at the time. PRAs earned new status in TMI's aftermath.
The Nuclear Regulatory Commission requires PRAs for new designs and established plants alike, using methods standardized by the mechanical engineering profession. Much as the Food and Drug Administration mandates a series of clinical trials to assess the efficacy and safety of a prospective drug, the NRC's layers of regulators and outside consultants examine PRA data. Dr. Modarres performed NuScale's PRA just as he has done for large scale reactors and presented his findings at last year's International Probabilistic Safety Assessment & Management Conference.
Dr. Modarres says NuScale is the safest reactor he's ever come across, 10,000 times less risk of any level of core damage than currently operating standard reactors, and it's 10 times safer than the Westinghouse AP1000 plants China's building now (pending NRC approval, it's also the design that will go up in Georgia).
So what if a natural disaster cut of external power to NuScale's water pumps that cool the reactor core -- the exact scenario now playing out in Japan?
It can't happen. There are no pumps.
In the NuScale plant, "You don't need a pump -- the heat creates a current of water by natural physics. Everything works by natural phenomena." Instead, the plant's steam generator tube is its weakest link, contributing the largest fraction of its 1 in 100-million-year risk. Physical properties of the tube which carries hot steam to the electricity-generating turbine come into play in the analysis. The tube could rupture, sending radioactive steam into the turbine and depriving the reactor core of water. In NuScale's PRA, Dr. Modarres created technical models of possible wear and tear of the pipe and its safety valves that could occur over the years. "We calculate through the 'physics of failure' an estimated frequency for this event," he says. The model gets even more complex, as the reactor automatically replenishes its water (or human operators can do so) through chemical volume control systems. The PRA models have to take into account the likelihood of this system failing too.
NuScale takes advantage of its design simplicity during its pre-NRC submission phase to change out elements and see how that affects its PRA (that pipe may get further tweaking before the NRC sees it). Such revisions on the fly aren't even possible with most larger more complex plants.
The reactor's size is one of its most important safety features. At 1/26th the size of standard reactors, there's simply less radioactivity to let loose. Dr. Reyes told the MIT crowd, "We've not only reduced the frequency of possible accidents, we reduced the consequences of accidents. That's huge psychologically." People who are afraid of flying don't really care about the frequency of accidents he says, it's the huge consequences of a single accident. "We've eliminated that."
Dr. Modarres explains the worst-case disaster scenario this way: "Even if one of the reactors fails and releases its radiation into the containment vessel, and again if that containment vessel fails and releases its material, it would be releasing that material into water, which is one of the best scrubbers for radioactive material." Ultimately a small amount of radioactive gases could make their way into the atmosphere, but mind you the whole operation is in an underground silo.
Since each module has its own separate metal containment vessel (unlike the traditional design of concrete domes that are getting repeatedly blasted in the hydrogen-fueled explosions at the Fukushima Daiichi plant), the probability of two reactors both leaking radiation is the probability of two independent extremely unlikely events. Even more reactors? Infinitesimal.
What about a major earthquake? "Being inside water, the forces that would be applied to the modules is much less. It's floating inside the water, so they wouldn't have as much force as if they were tied into the ground." Detailed seismic assessments are still being built into the model, and depend on location, but Dr. Modarres does not expect such events will increase major risk significantly.
Representative Edward Markey (D-MA) was sounding the alarm bells this weekend, yesterday sending a letter to President Obama requesting a moratorium on new nuclear power plants, reminiscent of European Greens. In light of the dire challenge posed by global warming, the growing destabilization in OPEC countries, and the ingenuity of America's nuclear engineers, the more appropriate federal response to the vulnerabilities in old nuclear plant designs that we share with Japan is to fully back nuclear energy 2.0 companies like NuScale.
A magnitude 7.8 earthquake struck Nepal early on Saturday, centered 10 miles below the surface, less than 50 miles from the capital of Kathmandu. At least 1,100 are already reported to have been killed by the quake and subsequent avalanches triggered in the Himalayas. Historic buildings and temples were destroyed, leaving massive piles of debris in streets as rescue workers and neighbors work to find and help those still trapped beneath rubble. Below are images from the region of the immediate aftermath of one of the most powerful earthquakes to strike Nepal in decades. (Editor's note, some of the images are graphic in nature.)
Freddie Gray's death on April 19 leaves many unanswered questions. But it is clear that when Gray was arrested in West Baltimore on the morning of April 12, he was struggling to walk. By the time he arrived at the police station a half hour later, he was unable to breathe or talk, suffering from wounds that would kill him.*
Gray died Sunday from spinal injuries. Baltimore authorities say they're investigating how the 25-year-old was hurt—a somewhat perverse notion, given that it was while he was in police custody, and hidden from public view, that he apparently suffered injury. How it happened remains unknown. It's even difficult to understand why officers arrested Gray in the first place. But with protestors taking to the streets of Baltimore since Gray's death on Sunday, the incident falls into a line of highly publicized, fatal encounters between black men and the police. Meanwhile, on Tuesday, a reserve sheriff's deputy in Tulsa, Oklahoma, pleaded not guilty to a second-degree manslaughter charge in the death of a man he shot. The deputy says the shooting happened while he was trying to tase the man. Black men dying at the hands of the police is of course nothing new, but the nation is now paying attention and getting outraged.
Where did it come from, and what are its intentions? The simplicity of these questions can be deceiving, and few Western leaders seem to know the answers. In December, The New York Times published confidential comments by Major General Michael K. Nagata, the Special Operations commander for the United States in the Middle East, admitting that he had hardly begun figuring out the Islamic State’s appeal. “We have not defeated the idea,” he said. “We do not even understand the idea.” In the past year, President Obama has referred to the Islamic State, variously, as “not Islamic” and as al-Qaeda’s “jayvee team,” statements that reflected confusion about the group, and may have contributed to significant strategic errors.
In her new book No One Understands You and What To Do About It, Heidi Grant Halvorson tells readers a story about her friend, Tim. When Tim started a new job as a manager, one of his top priorities was communicating to his team that he valued each member’s input. So at team meetings, as each member spoke up about whatever project they were working on, Tim made sure he put on his “active-listening face” to signal that he cared about what each person was saying.
But after meeting with him a few times, Tim’s team got a very different message from the one he intended to send. “After a few weeks of meetings,” Halvorson explains, “one team member finally summoned up the courage to ask him the question that had been on everyone’s mind.” That question was: “Tim, are you angry with us right now?” When Tim explained that he wasn’t at all angry—that he was just putting on his “active-listening face”—his colleague gently explained that his active-listening face looked a lot like his angry face.
Four hours after learning about Saturday's devastating earthquake in Nepal, I received a Facebook notification I had never seen before: Sonia, a journalist friend based in northern India, was "marked safe." An hour later, the same notification about a different friend popped up. Then another. Soon, several of my friends wrote that they, too, had learned via this strange new notification that their friends in Nepal were okay.
A few hours later, the mystery was solved. On Saturday afternoon, Facebook CEO Mark Zuckerberg announced on his timeline that the notifications came from Safety Check, a service the company launched last fall. "When disasters happen, people need to know their loved ones are safe," he wrote, "It's moments like this that being able to connect really matters."
After more than a year of rumors and speculation, Bruce Jenner publicly came out as transgender with four simple words: “I am a woman.”
“My brain is much more female than male,” he explained to Diane Sawyer, who conducted a prime-time interview with Jenner on ABC Friday night. (Jenner indicated he prefers to be addressed with male pronouns at this time.) During the two-hour program, Jenner discussed his personal struggle with gender dysphoria and personal identity, how they shaped his past and current relationships and marriages, and how he finally told his family about his gender identity.
During the interview, Sawyer made a conspicuous point of discussing broadly unfamiliar ideas about gender and sexuality to its audience. It didn't always go smoothly; her questions occasionally came off as awkward and tone-deaf. But she showed no lack of empathy.
The editors of Smithsonian magazine have announced the winners of their 12th annual photo contest, selected from more than 26,500 entries. The winning photographs from from the competition's six categories are published below: The Natural World, Travel, People, Americana, Altered Images and Mobile. Also, a few finalists have been included as well. Captions were written by the photographers. Be sure to visit the contest page at Smithsonian.com to see all the winners and finalists.
Lots of conservatives talk a good game about how citizens should resist federal control and devolve power to local governments. Few of them are willing to put their convictions into action in quite the same way that Sheriff Joe Arpaio is.
The man who calls himself "America's toughest sheriff" was already in trouble with Uncle Sam, on trial for contempt of court in a U.S. district court. It was only once that was under way that Arpaio and his lawyer apparently had the idea to sic a private investigator on the wife of the federal judge hearing his case. That shows toughness. It shows a willingness to use unorthodox tactics to resist federal interference. It's also not especially bright.
Reporters in the courtroom describe a somewhat shocking scene. Lawyers had completed their questioning when Judge Murray Snow announced he had some questions for Arpaio. After a series of queries, Snow asked: "Are you aware that I've been investigated by anyone?"
Today was the latest installment of the never-ending Clinton scandal saga, but it won’t be the last. Yet in some ways, the specifics are a distraction. The sale of access was designed into the post-2001 Clinton family finances from the start. Probably nobody will ever prove that this quid led to that quo … but there’s about a quarter-billion-dollar of quid heaped in plain sight and an equally impressive pile of quo, and it’s all been visible for years to anyone who cared to notice. As Jonathan Chait, who is no right-wing noise-machine operator, complained: “The Clintons have been disorganized and greedy.”
“All of this amounts to diddly-squat,” pronounced long-time Clinton associate James Carville when news broke that Hillary Clinton had erased huge numbers of emails. That may not be true: If any of the conduct in question proves illegal, destroying relevant records may also have run afoul of the law.
Our patient—we’ll call him W.B.—is a 56-year-old father of three who, until last year, had always been healthy. He had worked his entire life, in jobs ranging from automotive repair to sales, taking great pride in providing for his family, even though doing so had recently meant combining three part-time positions. All of that ended in February 2014, when he was diagnosed with amyotrophic lateral sclerosis, or ALS, commonly known as Lou Gehrig’s disease. A neurodegenerative disease characterized by progressive muscle weakness, ALS leads to the loss of all voluntary movement, difficulty breathing, and, in the end, death.
W.B.’s life was turned upside down by the diagnosis. But once the initial shock passed, he began researching his condition intensively. He learned that he was unlikely to survive five years, and that in the meantime his quality of life would diminish dramatically. With limited options, many patients retreat. But, quite bravely, W.B. had other ideas. After much consideration, he decided that if he was going to die, he would like to try to save another person’s life in the process, even if that person was a stranger. And so last May he approached the University of Wisconsin’s transplant program, where we are surgeons, as a prospective organ donor.