Robot maps ‘uranium’ faster, safer

‘RadPiper’ high-tech helper in plant pipe cleanup

COLUMBUS, Ohio, April 22, (AP): Ohio crews cleaning up a massive former Cold War-era uranium enrichment plant in Ohio plan this summer to deploy a high-tech helper: an autonomous, radiation-measuring robot that will roll through miles of large overhead pipes to spot potentially hazardous residual uranium.

Officials say it’s safer, more accurate and tremendously faster than having workers take external measurements to identify which pipes need to be removed and decontaminated at the Portsmouth Gaseous Diffusion Plant in Piketon. They say it could save taxpayers tens of millions of dollars on cleanups of that site and one near Paducah, Kentucky, which for decades enriched uranium for nuclear reactors and weapons.

The RadPiper robot was developed at Carnegie Mellon University in Pittsburgh for the US Department of Energy, which envisions using similar technology at other nuclear complexes such as the Savannah River Site in Aiken, South Carolina, and the Hanford Site in Richland, Washington.

Roboticist William “Red” Whittaker, who began his career developing robots to help clean up the Three Mile Island nuclear power accident and now directs Carnegie Mellon’s Field Robotics Center, said technology like RadPiper could transform key tasks in cleaning up the country’s nuclear legacy.

Cleanup

“A lot of the easy stuff has already been done,” Whittaker said. “As the nation addresses the next 50 years of this important cleanup, robots are going to have an increasingly important role in that.”

The technology development director for the energy department’s Office of Environmental Management, Rodrigo Rimando Jr., said every hour RadPiper operates will save an estimated eight hours of the conventional method.

That method is a slog: Once insulation and other materials are cleared to access the pipes, a worker elevated on scaffolding and wearing protective gear holds up a heavy detector, takes a reading, writes it down, and then repeats that for the next foot of pipe.

Workers did that 1.4 million times in one building

PM 2.5 can play a role in heart disease, stroke, and lung ailments such as emphysema and cancer.

For now, the facility — which was built in June 2016 — is just an experiment.

But its designers hope to build similar towers across the city. (AFP)

Cao Junji, an environmental protection expert at the Chinese Academy of Sciences, told reporters that it would take about 100 towers to cover the city of 1,000 square kms (385 square miles).

A lot of people have questioned the device’s effectiveness, he said.

“I questioned it myself. But when over three years, said Marty Reibold, director of strategic initiatives for Fluor-BWXT Portsmouth, the contractor decommissioning the site.

Now they’re focused on an even larger building, big enough to house 58 football fields on its two levels, Reibold said.

With the robot mapping uranium deposits and automatically logging data, some pipe analysis that used to take weeks can be finished same-day.

“The analyst can look at it, push the button, sign the report and say, ‘OK, I’m done with that pipe,’ so that’s huge for us,” Reibold said.

Two big lead discs bracket RadPiper’s detector, making it look a bit like a foot-long barbell. It works only in straight pipes, so workers still must manually check bends and valves.

The site will get two RadPipers, fitted for use in about 15 miles of pipes between 2.5 and 3.5 feet (0.8 and 1.1 meters) in diameter. The creators hope to make another version for the many more miles of smaller-diameter pipes.

The union representing many workers at the site remains cautious about robots replacing good-paying, locally coveted jobs. But it also could free up workers for other tasks, reduce their safety risks and teach them new skills, and if it accelerates cleanup to sooner attract new industry and jobs to the site, all the better, local union president Herman Potter said.

George Hornberger, director of the Vanderbilt Institute for Energy and Environment, said the challenge of cleaning up industrial facilities that processed radioactive materials is addressing health and safety risks in a way that protects workers but is also costeffective. RadPiper sounds beneficial on both fronts, said Hornberger, who wasn’t involved in the project.

The creators say the project’s speed points to its perceived value. They hatched the idea at a conference in March 2017 and were testing a version by last fall — lightning-fast for a $1.4-million, governmentfunded project and the procedural hurdles and approvals that entails.

we finished, the results were quite good. They met our expectations.”

China’s government under President Xi Jinping, declared “war” on pollution in 2014.

Pollution is so bad in many regions that people often wear masks on the street and buy expensive air purifiers for their homes.

This past winter, China cut production for many steel smelters, mills and factories.

The environment ministry imposed tough anti-pollution targets on 28 cities around Beijing, with at least three million homes expected to switch from coal to gas or electric heating.

RadPipers

China’s air quality improved in 2017, with the average level of PM 2.5 particles falling by 6.5 percent in 338 cities, according to environmental authorities.

A University of Chicago study found last year that air pollution in northern China had cut life expectancy by three years compared with the south of the country.

But a new study by the university in March found that China had made so much progress against smog that life expectancy could rise by more than two years. (AFP)