What even Nader apparently didn’t realize at the time was that at the Tennessee Valley Authority’s Browns Ferry nuclear station in northern Alabama, technicians routinely used candles to check for air leaks. There were occasional small fires, but they were usually extinguished without a problem.
On March 22, 1975, the workers weren’t so lucky. While workers using candles checked for leaks, fire broke out at Unit 1 and spread too quickly, burning for seven hours and leaving the plant without an emergency core cooling system. Luckily the operators were able to shut down the reactor when there was still enough water in the core to prevent damage or radioactive release.
Three decades later, in 2002, the country had what former Nuclear Regulatory Commissioner Victor Gilinsky called “its closest brush with disaster” since Three Mile Island’s 50% meltdown in 1979. A workman at the Davis-Besse reactor near Toledo, Ohio discovered a rust hole the size of a pineapple in the top of the reactor pressure vessel. Once again, fortune was on the side of the operator: The plant was down for maintenance, which is partly why the hole was discovered.
But reactors are also vulnerable to unpredictable human behavior and malfeasance.
In February 1993, a man drove his mother’s car past a guard booth the Three Mile Island plant, then smashed through an entry gate. He kept going until he crashed through a metal door and entered the turbine building of the Unit 1 reactor. The intruder, who had recently released from the mental ward of a local hospital, hid in a building and was not apprehended until four hours after he entered the site.
What if he’d been a terrorist armed with a ticking bomb?
The Tokyo Electric Power Co., operator of the crippled Fukushima plant, was forced to shut down its massive seven-unit nuclear plant at Kashiwazaki-Kariwa after a major earthquake in 2007. Afterward, the International Atomic Energy Agency revealed the plant had not been designed to withstand the 6.8-magnitude of the quake. Last week’s quake measured 9.0.
The industry knew it was on trial then. “We cannot afford another accident,” the IAEA’s then director-general Mohamed ElBaradei said after the event.
Now it’s on trial again.


In most countries, the global community has few ways of knowing what really goes on inside nuclear reactors because the industry is shrouded in secrecy. Corporations and governments control what information is made public. When information is made available, it is often couched in jargon and incomprehensible prose. Countless incidents worldwide have been insufficiently documented or not documented at all, according to a detailed 2007 study on nuclear safety conducted for the Green Party in the European Parliament.
In the United States, the Nuclear Regulatory Commission recently released its 2010 report card for the country’s 104 operating reactors.
Six of them scored C. In two of those, H.B. Robinson in South Carolina and Wolf Creek in Kansas, the agency said there were too many unplanned shutdowns. Fires and turbine problems were listed as the cause in the case of the Robinson plant and a number of other technical malfunctions in the case of Wolf Creek.
While that may seem encouraging given there were only six with the lowest rating, the NRC’s own effectiveness is under the spotlight in the wake of events in Japan.
The agency gets mixed reviews in a report released this week by the Union of Concerned Scientists. The report examines 14 “near-misses” at U.S. nuclear plants during 2010 that exposed “a variety of shortcomings, such as inadequate training, faulty maintenance, poor design, and failure to investigate problems thoroughly.” The UCS said that “since NRC inspections cannot reveal more than a fraction of the problems that exist, it is crucial for the agency to respond effectively to the problems it does find.”
The report offers examples of both effective and ineffective responses.
Most people think the industry has been under the microscope — and held to strict safety standards — since Three Mile Island. While there have been some improvements, human error and technical malfunctions have been its scourge since the 1950s. When the human cost of nuclear accidents — particularly at Chernobyl and now in Japan — are weighed, the cost of generating nuclear electricity looks like a different order of magnitude from all other forms of electricity generation, including coal mining.


If you don’t buy that argument, imagine being told to evacuate your home or to stay inside and keep the windows closed. How long should those windows remain closed? How long must important but impractical precautions be taken? Then imagine realizing — in a worst-case scenario — you can never return.
In Japan, people of all ages living in the vicinity of the Fukushima Daiichi plant could now spend the rest of the lives wondering whether they’ve inhaled invisible radioactive products that might cause cancer in themselves of their loved ones or genetic damage to the unborn.
For an energy source once touted as too cheap to meter, the true costs may be too great to fathom.
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