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AP Interview: Fukushima plant’s new ice wall not watertight via AP

TOKYO (AP) — Coping with the vast amounts of ground water flowing into the broken Fukushima nuclear plant — which then becomes radiated and seeps back out — has become such a problem that Japan is building a 35 billion yen ($312 million) “ice wall” into the earth around it.

But even if the frozen barrier built with taxpayers’ money works as envisioned, it won’t completely block all water from reaching the damaged reactors because of gaps in the wall and rainfall, creating as much as 50 tons of contaminated water each day, said Yuichi Okamura, a chief architect of the massive project.

“It’s not zero,” Okamura said of the amount of water reaching the reactors in an interview with The Associated Press earlier this week. He is a general manager at Tokyo Electric Power Co., or TEPCO, which operates the facility that melted down after it was hit by a tsunami in 2011, prompting 150,000 people to evacuate.

Workers have rigged pipes that constantly spray water into the reactors to keep the nuclear debris inside from overheating, but coping with what to do with the resulting radiated water has been a major headache. So far, the company has stored the water in nearly 1,000 huge tanks around the plant, with more being built each week.
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But critics say the problem of the groundwater reaching the reactors was a no-brainer that should have been projected.

Building a concrete wall into the hill near the plant right after the disaster would have minimized the contaminated water problem considerably, says Shigeaki Tsunoyama, honorary professor and former president of University of Aizu in Fukushima.

Even at the reduced amount of 50 tons a day, the contaminated water produced at Fukushima will equal what came out of Three Mile Island’s total in just eight months because of the prevalence of groundwater in Fukushima, he said.

Although TEPCO has set 2020 as the goal for ending the water problems, Tsunoyama believes that’s too optimistic.

“The groundwater coming up from below can never become zero,” he said in a telephone interview. “There is no perfect answer.”

Okamura acknowledged the option to build a barrier in the higher elevation near the plant was considered in the early days after the disaster. But he defended his company’s actions.

The priority was on preventing contaminated water from escaping into the Pacific Ocean, he said. Various walls were built along the coastline, and radiation monitors show leaks have tapered off over the last five years.

Opponents of nuclear power say the ice wall is a waste of taxpayers’ money and that it may not work.

“From the perspective of regular people, we have serious questions about this piece of research that’s awarded a construction giant,” says Kanna Mitsuta, director of ecology group Friends of the Earth Japan. “Our reaction is: Why an ice wall?”

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