Japan nuclear plant releases radioactive water into sea

Japan nuclear plant releases radioactive water into sea

Officials say the discharge means highly radioactive water leaking from reactor No 2 can be stored

Workers at Japan's quake-hit nuclear plant have begun dumping water with low levels of contamination into the sea to free up room to store more highly radioactive water leaking at the site.

About 11,500 tonnes of water will be released into the sea at the crippled Fukushima Daiichi nuclear plant.

Water with a higher level of radioactivity leaking from the No 2 reactor can then be stored.

Efforts to tackle that leak are continuing.

The source of the leak was identified at the weekend as a 20cm (8in) crack in a concrete pit at reactor 2.

Workers are now using dye to try to trace the route of the water, after earlier efforts to plug the hole using a highly absorbent polymer failed.

'No choice'

Operator Tepco has been struggling for more than three weeks to regain control at the plant after the huge earthquake and tsunami knocked out the cooling systems.

Workers face a dilemma - they must keep feeding water into the reactors to stop them overheating, but must then deal with the accumulation of waste water.

Top government spokesman Yukio Edano said that there was no choice but to release some water.

"We are already aware that the water at the No 2 unit is highly radiated," he said.

"So as to prioritise to stop the leakage of this water into the sea... we will release the water stored in the exterior building of the unit, which also unfortunately contains radioactivity but far lower than the highly contaminated water."

The water to be released into the sea contains some 100 times the legal limit of radiation - a relatively low level, says the BBC's Roland Buerk in Tokyo.

"As it is not harmful to people's health and as it is necessary to avert an even bigger danger, we decided it was inevitable," said Hidehiko Nishiyama of Japan's Nuclear and Industrial Safety Agency (Nisa).


Stopping the leak from reactor 2 remains the priority, Mr Edano said earlier.

Tepco says it will inject the polymer again to try to block the flow of radioactive water as soon as it has identified the path of the leak.

As a temporary measure, Nisa is considering building embankments of silt near reactor No 2 to stem the leak into the ocean.

Search operations

The official death toll from the 9.0-magnitude earthquake and tsunami which struck north-east Japan on 11 March stands at 12,157, with nearly 15,500 people still unaccounted for.

More than 80% of the victims have been identified and their bodies returned to their families.

Search operations within the 20km exclusion zone around the Fukushima Daiichi power plant have been suspended because of radiation concerns.

More than 161,000 people from quake-ravaged areas are living in evacuation centres, officials say.

A three-day joint operation by Japan's Self-Defense Forces and the US military to find the missing recovered 78 bodies.


The operation, which ended on Sunday, involved about 25,000 troops, more than 60 ships and 120 aircraft.

It covered Pacific coastal areas of Iwate, Miyagi and Fukushima prefectures.

Workers endure austere conditions in averting nuclear disaster

Workers endure austere conditions in averting nuclear disaster

Austere conditions for Fukushima workers

Tokyo (CNN) -- They sleep anywhere they can find open space -- in conference rooms, corridors, even stairwells. They have one blanket, no pillows and a leaded mat intended to keep radiation at bay.

They eat only two meals each day -- a carefully rationed breakfast of 30 crackers and vegetable juice and for dinner, a ready-to-eat meal or something out of a can.They clean themselves with wet wipes, since the supply of fresh water is short.

These are the grueling living conditions for the workers inside Japan's crippled Fukushima Daiichi nuclear power plant. They've been hailed as heroes risking their lives by braving high levels of radiation as they work to avert a nuclear meltdown.

But until now, the outside world has known little about the workers' routine.

Tuesday, safety inspector Kazuma Yokota, who spent five days at the plant last week, spoke with CNN about the plight of the 400 workers staying in a building within 1 kilometer (.6 of a mile) of Reactor No. 1. Japanese officials ordered mandatory evacuations for everyone else within 20 (12.4 miles) kilometers of the plant.

The workers look tired, Yokota said. They are furiously connecting electrical cables, repairing instrument panels and pumping radioactive water out.

They work with the burden of their own personal tragedies always weighing heavily.

"My parents were washed away by the tsunami, and I still don't know where they are," one worker wrote in an e-mail that was verified as authentic by a spokesman for the Tokyo Electric Power Co., which runs the Fukushima plant.

"Crying is useless," said another e-mail. "If we're in hell now, all we can do is crawl up towards heaven."

But they are doing it all with the kind of determination required in a task with such high stakes. There's no room for plummeting morale and the workers are not showing any signs of spirits flagging, Yokota said.

However upbeat the workers are, there's no denying the conditions are beyond difficult.

"On the ground at the nuclear power plant, the workers are working under very dangerous and very hard conditions, and I feel a great deal of respect for them," Chief Cabinet Secretary Yukio Edano told reporters Tuesday.

The workers spend three days on site and go off for one. They start their work day at 8 a.m. and go for 12 long hours.

Gary Was, a nuclear engineering expert at the University of Michigan, told CNN Tuesday that contaminated seawater brings potential danger "and they need to take all precautions."

Particulates that land on the skin or are ingested "can be a constant source of radiation into the future," Was said. "You need to be very careful not to ingest any of that."

Was said officials need to remove and store contaminated water.

Last week, three men who were laying electrical cable in the turbine building of the No. 3 reactor stepped in tainted water, exposing themselves to high levels of radiation. Tokyo Electric apologized and said their exposure might have been avoided with better communication.

Radiation alarms went off while the three men were working, but they continued with their mission for 40 to 50 minutes after assuming it was a false alarm. They were hospitalized after it was determined they had been exposed to 173 to 181 millisieverts of radiation -- two of them with direct exposure on their skin. They were later released.

By comparison, a person in an industrialized country is naturally exposed to 3 millisieverts per year, though Japan's Health Ministry has said that those working directly to avert the nuclear crisis could be exposed to as much as 250 millisieverts before they must leave the site.

The incident also prompted further criticism of Tokyo Electric and how well it is safeguarding the workers.

Yokota said the power company hoped to improve living conditions for the workers by moving them to another facility. Edano said officials also hope to find replacements in order to relieve the workers at the plant.

Until then, they will continue as the faceless heroes in Japan's tragedy, the nation's only hope of thwarting further disaster.