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360-liter leak from the desalination unit

June 21, 2013




Leak found at Fukushima Daiichi desalting device



Tokyo Electric power Company says radiation-contaminated water was found to have leaked from a desalinating device at the crippled Fukushima Daiichi Nuclear Power Plant.

The plant operator adds that the leak stopped when it halted the device, and that the water has not flowed outside the complex.

TEPCO said a worker detected the leak at the device that removes salt from water used for reactor cooling at about 3 AM on Friday.

The company estimates that about 360 liters leaked out. Radioactive cesium was already removed from the water at a different unit, but the water still contains radioactive strontium and other substances.

The utility said the leaked water is contained inside a barrier installed at the building that houses the device.

It also said reactor cooling has not been hampered by the halt of the desalination device, as processed water stored in tanks is used instead.

The device has been hit by similar leaks in the past.

TEPCO is investigating the cause.

Jun. 21, 2013 - Updated 02:27 UTC

360 liters of radioactive water leaks from Fukushima No. 1




An estimated 360 liters of radioactive water has leaked from a desalination unit at the ruined Fukushima No. 1 nuclear power plant, Tokyo Electric Power Co. said Friday.

The utility said water did not leave the complex but did not disclose its radiation level.

The leak was discovered after a leak detector went off at around 3 a.m. Friday. A plant worker found the water in a building housing the desalination unit and suspended it.

The desalination unit is used to remove salt from radioactive water after cesium and other radioactive materials have been filtered out.


See also
360 liters of tainted water leaked at Fukushima Daiichi



TOKYO (Kyodo) -- An estimated 360 liters of radioactive water has leaked from a desalination unit at the crippled Fukushima Daiichi nuclear power plant, Tokyo Electric Power Co. said Friday.

The contaminated water has not flowed outside of the complex, and radiation doses measured at monitoring posts around it have not changed significantly, according to the utility.

After a leak detector was activated around 3 a.m. Friday, a plant worker confirmed the water leak inside a building housing the desalination unit. The worker suspended the unit.

The desalination unit is used to remove salt from tainted water after cesium and other materials have been taken out.

More leaks of contaminated water discovered at Fukushima nuclear plant




Two more leaks of radioactive water found at the Fukushima No. 1 nuclear plant suspended desalination operations and will likely further delay the full-scale use of a decontamination system, Tokyo Electric Power Co. said.

TEPCO on June 21 confirmed that 360 liters of highly contaminated water spilled from one of the three desalination units in a temporary warehouse at the plant, but the water did not flow outside.

A worker found the water under the desalination unit around 3 a.m. on June 21. The water stopped leaking after the worker shut down the equipment, TEPCO said.

It was the 11th water leak confirmed in the desalination system.

An analysis of the leaked water showed radioactivity levels of strontium and other substances at 26 million becquerels per liter. That level is almost the same as that of untreated highly-contaminated water. Strontium tends to accumulate in human bones.

Almost no radioactive cesium was detected in the water, TEPCO said.

The desalination system removes salinity from water used to cool the reactors at the nuclear plant.

TEPCO said it is investigating the cause of the latest leakage.

On June 20, the company said radioactive water was found leaking from a small fracture on a storage tank in the decontamination system at the plant.

It was the second leak discovered in the Alps multinuclide removal equipment.

TEPCO confirmed on June 16 that radioactive water was leaking from a different tank in the Alps equipment and suspended the system’s operations.

The Alps system, which can remove 62 radioactive substances, including strontium, from water, comprises three decontamination units, each using two tanks to store untreated water.

The two leaking tanks are part of the same unit.

TEPCO planned to finish trial operations of the Alps equipment by the end of July, but the leaks will likely delay that schedule.

The company said it has visually checked the other two units and found no problems.


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