Featured Research

from universities, journals, and other organizations

The Fukushima Dai-ichi Nuclear Power Plant accident: Two years on, the fallout continues

Date:
April 15, 2013
Source:
Taylor & Francis
Summary:
More than two years after the earthquake and tsunami that devastated parts of Japan, scientists are still trying to quantify the extent of the damage.

More than two years after the earthquake and tsunami that devastated parts of Japan, scientists are still trying to quantify the extent of the damage.

Of particular importance is determining just how much hazardous material escaped into the atmosphere from the stricken Fukushima Dai-ichi nuclear power plant in the period following the disaster on 11 March 2011.

Scientists estimate a 'source term' (the types and amounts of hazardous materials released following an accident) by running computerised atmospheric and oceanic dispersal simulations and collecting samples from seawater. Data from the Fukushima incident is unfortunately plentiful. Immediately after the accident some radionucleids were carried east by a strong jet stream and reached the west coast of North America in just four days; other airborne radionucleids were eventually deposited into the Pacific Ocean. Further releases of hazardous material occurred through accidental and intentional discharges of contaminated water from the plant into the ocean.

Writing in the Journal of Nuclear Science and Technology, a team of researchers from the Japan Atomic Energy Agency now reveal that the previously estimated release rates of 137C and 131I were too low. They present their new source-term estimates for 12-20 March 2011, as refined through four numerical models and seawater data. Their comparison of the statistics obtained using the new source term with those obtained with the initial source term showed that all statistic values were improved by the new calculation. Their study also shows the effectiveness of using radionucleids observed in seawater to estimate the source term of atmospheric release in coastal areas.

Further research and modelling is needed to improve their new estimate, but this study is an important step in understanding the likely effects of the Fukushima incident on the marine environment by providing a clearer picture of how much hazardous material was actually released.


Story Source:

The above story is based on materials provided by Taylor & Francis. Note: Materials may be edited for content and length.


Journal Reference:

  1. Takuya Kobayashi, Haruyasu Nagai, Masamichi Chino, Hideyuki Kawamura. Source term estimation of atmospheric release due to the Fukushima Dai-ichi Nuclear Power Plant accident by atmospheric and oceanic dispersion simulations. Journal of Nuclear Science and Technology, 2013; 50 (3): 255 DOI: 10.1080/00223131.2013.772449

Cite This Page:

Taylor & Francis. "The Fukushima Dai-ichi Nuclear Power Plant accident: Two years on, the fallout continues." ScienceDaily. ScienceDaily, 15 April 2013. <www.sciencedaily.com/releases/2013/04/130415094845.htm>.
Taylor & Francis. (2013, April 15). The Fukushima Dai-ichi Nuclear Power Plant accident: Two years on, the fallout continues. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2013/04/130415094845.htm
Taylor & Francis. "The Fukushima Dai-ichi Nuclear Power Plant accident: Two years on, the fallout continues." ScienceDaily. www.sciencedaily.com/releases/2013/04/130415094845.htm (accessed October 20, 2014).

Share This



More Earth & Climate News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

3BL Media (Oct. 20, 2014) Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-fuel Impala Video provided by 3BL
Powered by NewsLook.com
White Rhino's Death In Kenya Means Just 6 Are Left

White Rhino's Death In Kenya Means Just 6 Are Left

Newsy (Oct. 20, 2014) Suni, a rare northern white rhino at Ol Pejeta Conservancy, died Friday. This, as many media have pointed out, leaves people fearing extinction. Video provided by Newsy
Powered by NewsLook.com
Beijing Marathon Runners Brave Hazardous Air Pollution

Beijing Marathon Runners Brave Hazardous Air Pollution

AFP (Oct. 19, 2014) Tens of thousands of runners battled thick smog at the Beijing Marathon on Sunday, with some donning masks as the levels of PM2.5 small pollutant particles soared to 16 times the maximum recommended level. Duration: 00:54 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins