A new roof for reactor No.1

August 2, 2017

Hydrogen blast reactor’s new roof in progress at Fukushima

http://www.asahi.com/ajw/articles/AJ201708020046.html

By CHIKAKO KAWAHARA/ Staff Writer

OKUMA, Fukushima Prefecture--Tokyo Electric Power Co. showed reporters its progress in installing a new roof above Fukushima No. 1 nuclear plant’s No. 3 reactor building on Aug. 2, ahead of work to remove spent nuclear fuel from a storage pool.

The company demonstrated how it is carrying out the work, which is necessary because the upper section of the reactor building was blown off in a hydrogen explosion in the nuclear disaster at the plant in March 2011.

The roof project marks a step toward removing nuclear fuel assemblies in the spent nuclear fuel storage pool in the building.

To prevent the spread of radioactive material, TEPCO started to set up the half-tubular shaped cover to shield the damaged reactor building at the end of last month.

The 566 nuclear fuel assemblies currently lying in the pool will become a significant risk if another major disaster strikes the area.

TEPCO is expected to start removing the fuel from around mid-fiscal 2018.

Early on Aug. 2, part of the roof measuring around 17 meters high and weighing 37 tons was lifted to the top floor of the reactor building with a large crane.

Workers connected the new part of the cover to another section that had been installed at the end of July, completing one eighth of the roof. When finished, it will be about 60 meters long.

Dedicated removal machines are needed to retrieve the fuel from the storage pool. The machines that had been used at the plant prior to the accident were removed because they were severely damaged by the hydrogen explosion.

August 2, 2017

Fuel removal prep begins at Fukushima Daiichi

https://www3.nhk.or.jp/nhkworld/en/news/20170802_17/

Workers at the crippled Fukushima Daiichi nuclear power plant are preparing to remove nuclear fuel from one of the damaged reactor buildings.

They began to put part of a dorm-shaped cover over the No.3 reactor building on Wednesday morning. This work is to prevent radioactive materials from spreading and shelter the area from winds.

The completed cover would measure 17 meters high and 11 meters wide and weigh 37 tons.

A total of 566 spent and unused fuel units remain in the fuel cooling pool.

Tokyo Electric Power Company plans to remove the fuel in the next fiscal year starting in April, 2018, as part of decommissioning the plant.

A Kajima Corporation official in charge of the installation said they may put a lid on the pool to ensure nothing falls into it.

392 fuel units remain in the No.1 reactor pool and 615 units in the No.2 reactor pool.