Scientists who’ve been pursuing the fusion dream have left us with little more than a thicket of delusions and broken promises. And, if one is to believe them now, after six decades of work, the clean, nearly limitless power of fusion is still 20 years away. At this rate, it will always be.
The Cryostat forms the vacuum-tight container surrounding the ITER vacuum vessel and the superconducting magnets, essentially acting as a very large refrigerator. It will be made of stainless steel with thicknesses ranging from 50 mm to 250 mm. The structure is designed for 8,500 m3. Its overall dimensions will be 29.4 meters in diameter and 29 meters in height. The heavy weight will bring more than 3,800 tons onto the scale, making it the largest vacuum vessel ever built out of stainless steel. Illustration © 2012 ITER Organization.
Just a few weeks ago, a bunch of fusion scientists used South Korean money to begin designing a machine that nobody really thinks will be built and that probably wouldn’t work if it were. This makes the machine only slightly more ludicrous than the one in France that may or may not eventually get built and, if and when it’s finally finished, certainly won’t do what it was initially meant to do. If you’ve guessed that the story of fusion energy can get a bit bizarre, you’d be right.
For one thing, the history of fusion energy is filled with crazies, hucksters, and starry-eyed naifs chasing after dreams of solving the world’s energy problems. One of the most famous of all, Martin Fleischmann, died earlier this year. Along with a colleague, Stanley Pons, Fleischmann thought that he had converted hydrogen into helium in a beaker in his laboratory, never mind that if he had been correct he would have released so much energy that he and his labmates would have been fricasseed by the radiation coming out of the device. Fleischmann wasn’t the first—Ronald Richter, a German expat who managed to entangle himself in the palace intrigues of Juan Peron, beat Fleischmann by nearly four decades—and the latest schemer, Andrea Rossi, won’t be the last.
The reason’s easy to see: On paper, fusion energy has almost unlimited potential. A fusion reaction releases an extraordinary amount of energy by slamming together light atoms, such as hydrogen, to make heavier ones, such as helium. (Fission is essentially the opposite: breaking apart heavy atoms, such as uranium, to make lighter ones.) Fusion is the same process that powers the sun—and it’s so efficient that we’d have enough atomic fuel on Earth to satisfy our civilization’s need for energy for, essentially, forever. The problem is that it’s really hard to slam those atoms together hard enough. You need incredibly high temperatures, tens or hundreds of millions of degrees Celsius, so that the atoms are moving fast enough to get the reaction going. But as you heat your fuel up, you have to keep it contained. A 100-million-degree plasma wants to explode in all directions, but if you’re going to keep the reaction going, you have to keep it bottled up. What do you make the bottle out of?
One way—and it works beautifully—is to use an atom bomb as the bottle. On Nov. 1, 1952, America used fusion energy to wipe the Pacific island of Elugelab off the face of the planet. The device at the heart of the “Ivy Mike” test was essentially a big, chilly tank of heavy hydrogen. At one end was a Nagasaki-type plutonium bomb, which, when it exploded, compressed the fuel, heated it to millions of degrees, and kept it bottled up. For a fraction of a second, we unleashed the power of the sun upon the surface of the Earth. The bomb that leveled Hiroshima was the equivalent of about 15 kilotons of TNT. Ivy Mike was about 10 megatons, nearly 700 times as powerful. And there is theoretically no upper limit to how large you can make these devices if you so desire. (The Soviet Union detonated a 50-megaton whopper in the 1960s.)
The design works, but it’s a pretty poor solution to the world’s energy needs. It’s tough to turn a fusion weapon into a safe supplier of electricity. That isn’t to say we haven’t tried to harness the H-bomb. Edward Teller, the Strangelove-ian father of Ivy Mike, tried to convince the world that fusion weapons could be used for peaceful purposes, fromcontrolling the weather to nuclear fracking to carving an Alaskan harbor out of bedrock to nuking the moon. Yes, Edward Teller wanted to nuke the moon to, in his words, “observe what kind of disturbance it might cause.”
Teller’s dream of unlimited fusion energy didn’t die with him. The Lawrence Livermore National Laboratory, Teller’s former stomping grounds, is now the site of a monstrous $4 billion-plus fusion project known as the National Ignition Facility. The idea is to compress and bottle up a pea-sized pellet of hydrogen by using a laser so huge that it would make any red-blooded moon-nuking megalomaniac proud. The putative goal is to generate more energy through fusing hydrogen atoms than the energy that was put in by the laser in the first place. And NIF scientists say that they’ll achieve success in 2010 … rather,they’ll achieve success by October 2012 … rather, NIF has succeeded at the crucial goal of showing that Livermore scientists’ predictions of success were all dead wrong.
It’s par for the course. Livermore has been predicting imminent success with laser fusion since the late 1970s—always failing miserably at fulfilling every prediction. In fact, critics (myself included) have long said that all the chin music about NIF being a source of fusion energy was nonsense. The laser is designed for studying nuclear weapons, not for generating energy. (And it won’t even do the weapons job very well.) Yet scientists at Livermore keep pretending that their hyper-expensive laser research is somehow going to produce fusion energy, even though they’ve got to go through Rube Goldberg-esque variations of the idea to make it look like they’ve got a shot at success. (For those keeping score at home, the latest project, too, will be an abject failure if it ever gets funding.)
Livermore is far from alone when it comes to overselling fusion. Way back in 1955, before the invention of the laser, physicists were predicting that fusion energy would be on tap within 20 years. Back then, the only workable method of bottling up a cloud of million-degree hydrogen, short of setting off an atomic bomb, was to use giant magnets. At that time, a number of scientists around the world attempted to design machines that wouldheat and confine burning hydrogen clouds with powerful electromagnetic fields. They didn’t work as predicted; even after decade upon decade of false starts, the magnetic bottles were just too leaky. Yet fusion energy was still always just around the next corner.
Magnetic fusion wasn’t just for the Americans, but also for the Soviets, the Germans, the Japanese, the British—everybody who was anybody had a magnetic fusion program that would put power on the grid within the next few decades. At least this was the case until the 1985 Soviet-American Summit in Geneva, when Reagan and Gorbachev agreed that our countries would research fusion energy together. Within a few years, everybody who was anybody was now part of a big multibillion-dollar project to build a giant magnetic fusion bottle known as ITER.
It takes a truly international effort to create something as powerfully screwed up as ITER. Yet if your only source of information were the ITER project’s own history, you’d have no clue just how rocky the project has been behind the scenes. There’s no mention of the nasty battles over cost overruns in the late 1980s and early 1990s. There isn’t any hint of how scientists working on domestic fusion projects—whose budgets were getting eaten by ITER—worked behind the scenes to scuttle the international project. (And they succeeded: In 1998, the United States pulled out of the project, sending the whole endeavor back to the drawing board.) There’s no sign of the dramatic scaling down of the machine’s design (ITER had become ITER-Lite). Nor is there any acknowledgement that the new, cheaper, machine would simply be unable to achieve ITER’s original goal of “ignition and sustained burn”—a fusion reaction that can be kept going indefinitely.
In the aftermath of the U.S. pullout, the remaining partners regrouped, settled on the cheap design and a bare-bones budget. The United States then rejoined, and construction crews even broke ground in France for the reactor site. ITER is currently under construction in France. But despite these hopeful developments, the reborn project is foundering—dragged down by the very same forces that doomed the original ITER. The bare-bones budget (supposedly around $5 billion when the United States rejoined the project) has swollen back up to Falstaffian proportions (the latest estimate is $20 billion), and each year, the estimated completion date just keeps getting pushed further and further into the future. (A quick look into the Internet wayback machine shows the dates in flux.)
The present trajectory of the reborn ITER looks incredibly familiar to anyone who watched the original project go down in flames. First comes ballooning costs and schedule slippage, and then, like clockwork, the United States begins to have difficulty coming up with the money it promised. Back in 2008, U.S. officials started telling Congress that, given tight budgets, we were likely not going to be able to shoulder our agreed-upon share of the ITER project costs. In an attempt to come up with the money, the Department of Energy has been squeezing our domestic fusion program, but there simply isn’t enough cash to go around. (As Sen. Dianne Feinstein asked Secretary of Energy Steven Chu in March, “And if we continue to fund [ITER], where would the $300 million [for our soon-to-be annual ITER contribution] come from?” Secretary Chu’s answer: “Senator,you’re asking a very important question we’ve asked ourselves.”) Naturally, domestic fusion scientists whose budgets are being slashed are freaking out.
Viewed against this backdrop, the recent announcement by Princeton Plasma Physics Laboratory that it’s working with South Korea to design a fusion reactor—one that doesn’t have a snowball’s chance in hell of ever being built—demonstrates the chaos that’s gripped the fusion community. The scientists at PPPL are promising a billion-watt demonstration fusion power plant in the 2030s (20 years away!), without using any data from ITER. Since the whole point of ITER is to assist in the design of a demonstration fusion power plant, the implication seems to be that the $20-billion project is pretty much superfluous. (Without any sense of cognitive dissonance, even ITER’s website suggests that scientists will complete the design of a demonstration power plant in 2017, two years before ITER gets plugged in, at the same time they emphasize how crucial ITER is to the prospect of a future fusion power plant.)
Given this history, it’s easy to understand why fanatical devotees gravitate to unorthodox approaches to fusion energy, be they cold-fusion moonbattery or schemes touted by startup companies with more cash than brains. The mainstream scientists who’ve been pursuing the dream have left us with little more than a thicket of delusions and broken promises. And, if one is to believe them now, after six decades of work, the clean, nearly limitless power of fusion is still 20 years away. At this rate, it will always be.