JAPAN ATOMIC INDUSTRIAL FORUM, INC.

for Japanese

ATOMS in JAPAN

29 October, 2015

TEPCO Completes Seaside Shielding Wall at Fukushima Daiichi, Greatly Reducing Risk of Contaminated Water Leakage

On October 26, the Tokyo Electric Power Co. (TEPCO) completed installing the shielding wall fronting the ocean next to the Fukushima Daiichi Nuclear Power Plants by treating the joints to improve the wall’s watertightness. The power company had begun the project in April 2012 to prevent oceanic pollution by blocking contaminated groundwater from exiting the site comprising Units 1 to 4.

Seaside Shielding Wall

The measure has the direct aim of preventing leakage of the contaminated water, which is the last of the three basic methods of dealing with the problem, namely removing the source of the contamination, isolating groundwater from the contamination source, and preventing leakage of the contaminated water.

The wall, which extends approximately 780m, was constructed using 594 steel sheet piles. As a result, the risk has been substantially reduced that contaminated groundwater will overflow into the port area and ocean when the site is eventually decommissioned over the medium-range and long-range future.

TEPCO has said that the effectiveness of the new shielding wall in stopping leakage has already been seen in groundwater levels rising on the land side. It added that it would continue monitoring the port area.

After finishing the installation of the steel sheet piles on September 22, TEPCO used an underwater camera to confirm the soundness of the interior of the joints installed between adjacent piles, then poured mortar into the joints in two steps to improve watertightness. On October 26, it confirmed the condition of the joints, and deemed the process of closing the wall complete.

Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

SNS facebooktwitter

NPPs Map

Video

Voices from Nuclear Industry – Contributing to a clean and resilient recovery

3 September, 2020
Voices from Nuclear Industry – Contributing to a clean and resilient recovery03:59

Recent News

1 March, 2021
Japan Research Reactor No. 3 Resumes Operation
26 February, 2021
Marking the Tenth Anniversary of the Fukushima Daiichi Accident
25 February, 2021
Registration Opens for the 54th JAIF Annual Conference
24 February, 2021
FEPC Chairman Explains Response to Earthquake off Fukushima
17 February, 2021
Site for Spent Fuel Intermediate Storage Facility Outside Fukui Prefecture to Be Determined by End of 2023
5 January, 2021
New Year’s Greeting by JAIF Chairman Imai
10 December, 2020
Japan’s NRA Recognizes Compatibility of JNFL’s MOX Fuel Fabrication Plant with New Regulatory Standards, Approving Changes
3 December, 2020
MHI Launches New Strategy to Achieve Carbon Neutrality by 2050
26 November, 2020
JAIF Releases Results of Fact-finding Survey of Japanese Nuclear Industry for Fiscal 2019: Some Effects Seen of COVID-19
24 November, 2020
Japan’s Energy Supply and Demand in Fiscal 2019 Shows CO2 Emissions Down for Sixth Year in a Row
▲TOP