Fukushima Inspiring Change in China and Germany

Beijing rethinks nuclear safety while Berlin pushes to rewire a balkanized grid

2 min read
Fukushima Inspiring Change in China and Germany

Editor's Note: This is part of IEEE Spectrum's ongoing coverage of Japan's earthquake and nuclear emergency.

Amidst the stubbornly disappointing string of news emanating from Japan's Fukushima Dai-1 nuclear complex, there are signs that its melting nuclear fuel rods are inspiring some important and long-overdue developments in global power systems. And there's good news for both nuclear supporters and critics.

Hopeful spinoff number one: Berlin is getting serious about upgrading the balkanized and inadequate transmission grid that represents a serious liability for Germany's renewable energy ambitions.

Chancellor Angela Merkel's decision last month to shut down Germany's oldest nuclear reactors and temporarily scrub life extensions for the rest was widely seen as a sop to voters in the state of Baden-Württemberg. Well, Merkel's Conservative Democrats lost the state to the Green Party, and she hasn't looked back. Last week a document leaked from Germany's Economy Ministry and reported by Bloomberg revealed plans to revamp the power grid--a precondition to replacing nuclear energy with solar, wind and other renewable power sources.

The need for action is evident. The German Energy Agency estimated in 2005 that the country needed 850 kilometers of new high-voltage lines by 2015 to absorb growing levels of wind power on its fragmented grid. So far, only 90 km have been built, and the challenge keeps growing: An updated study released in November estimated that 3,600 km of new lines have to be built by 2020/2025.

Hopeful spinoff number two is China's modest nuclear slowdown. Beijing reaffirmed its nuclear ambitions immediately after Japan's earthquake-tsunami double-punch unhinged Fukushima Dai-1's cooling systems. But then it began to backpedal, suspending new plant approvals and stepping up safety inspections at existing plants. Whether you're a nuclear supporter or not, this is very good news.

That's because while China's nuclear future is assured, its nuclear safety is not. China has some two dozen reactors under construction, including a domesticated and upgraded version of France’s existing light-water reactors, Westinghouse’s AP1000 advanced light water reactors, and a modular pebble-bed reactor of Chinese design.

Problem is that China's nuclear exuberance outstripped the process of training  nuclear operators and inspectors. That inspired surprisingly frank criticism from National Nuclear Safety Administration director Li Ganjie two years ago -- to little apparent effect.

Confronting proposals to more than double the pace of China's nuclear construction schedule, Ganjie courageously warned an IAEA meeting in Beijing that "over-rapid expansions" could diminish reactor quality and safety. Ganjie lost that round, and China's nuclear capacity goal for 2020, already set to jump more than four-fold to 40 gigawatts, shot up to 86 GW. 

Now we're hearing a different tune. Last week AP cited state media reporting that, "China is likely to scale back its ambitious plans ... under a new policy that stresses safety instead of rapid development." AP quoted deputy director of the China Electricity Council, Wei Zhaofeng, predicting that the policy change would trim growth by 10 GW.

That 10 GW may look small relative to China's target, but in real terms it is a massive quantity of reactor construction. Most nuclear power proponents will count themselves lucky if the U.S. adds that much reactor capacity by 2020.

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Smokey the AI

Smart image analysis algorithms, fed by cameras carried by drones and ground vehicles, can help power companies prevent forest fires

7 min read
Smokey the AI

The 2021 Dixie Fire in northern California is suspected of being caused by Pacific Gas & Electric's equipment. The fire is the second-largest in California history.

Robyn Beck/AFP/Getty Images

The 2020 fire season in the United States was the worst in at least 70 years, with some 4 million hectares burned on the west coast alone. These West Coast fires killed at least 37 people, destroyed hundreds of structures, caused nearly US $20 billion in damage, and filled the air with smoke that threatened the health of millions of people. And this was on top of a 2018 fire season that burned more than 700,000 hectares of land in California, and a 2019-to-2020 wildfire season in Australia that torched nearly 18 million hectares.

While some of these fires started from human carelessness—or arson—far too many were sparked and spread by the electrical power infrastructure and power lines. The California Department of Forestry and Fire Protection (Cal Fire) calculates that nearly 100,000 burned hectares of those 2018 California fires were the fault of the electric power infrastructure, including the devastating Camp Fire, which wiped out most of the town of Paradise. And in July of this year, Pacific Gas & Electric indicated that blown fuses on one of its utility poles may have sparked the Dixie Fire, which burned nearly 400,000 hectares.

Until these recent disasters, most people, even those living in vulnerable areas, didn't give much thought to the fire risk from the electrical infrastructure. Power companies trim trees and inspect lines on a regular—if not particularly frequent—basis.

However, the frequency of these inspections has changed little over the years, even though climate change is causing drier and hotter weather conditions that lead up to more intense wildfires. In addition, many key electrical components are beyond their shelf lives, including insulators, transformers, arrestors, and splices that are more than 40 years old. Many transmission towers, most built for a 40-year lifespan, are entering their final decade.

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