Featured Research

from universities, journals, and other organizations

How long does selenium radiate in nuclear waste?

Date:
September 6, 2010
Source:
Physikalisch-Technische Bundesanstalt (PTB)
Summary:
In order to estimate the safety of final storage for nuclear wastes, it is important to know the half-lives of the radioactive elements of the nuclear waste as accurately as possible. The half-life indicates the period of time in which the amount of a radioactive element decreases by half and breaks down into other atoms. This period of time can, depending on the composition of the nuclear waste, amount to decades or even millions of years.

Data on half-life of Selenium.
Credit: PTB

PTB scientists determine the half-life of 79selenium more precisely.

In order to estimate the safety of final storage for nuclear wastes, it is important to know the half-lives of the radioactive elements of the nuclear waste as accurately as possible. The half-life indicates the period of time in which the amount of a radioactive element decreases by half and breaks down into other atoms. This period of time can, depending on the composition of the nuclear waste, amount to decades or even millions of years.

In low and intermediate-level waste, the isotope 79selenium is found. Previous determinations of its half-life varied strongly between 124 000 and 1 130 000 years. In order to be able to come to a more accurate conclusion here as to how long nuclear waste which contains this isotope will probably radiate, researchers from various institutes have joined forces: Scientists from the Physikalisch-Technische Bundesanstalt (PTB), the Lehrstuhl für Radiochemie (Institute for Radiochemistry) of the TU Munich, the Institut für Transurane (Institute for Transuranium Elements) in Karlsruhe and the Paul Scherrer Institute in Villingen (Switzerland) have now redetermined the half-life of 79selenium with a clearly improved measurement uncertainty to. Their result: 327 000 years.


Story Source:

The above story is based on materials provided by Physikalisch-Technische Bundesanstalt (PTB). Note: Materials may be edited for content and length.


Journal Reference:

  1. Gerhard Jörg, Rolf Bühnemann, Simon Hollas, Niko Kivel, Karsten Kossert, Stefaan Van Winckel, Christoph Lierse v. Gostomski. Preparation of radiochemically pure 79Se and highly precise determination of its half-life. Applied Radiation and Isotopes, 2010; DOI: 10.1016/j.apradiso.2010.05.006

Cite This Page:

Physikalisch-Technische Bundesanstalt (PTB). "How long does selenium radiate in nuclear waste?." ScienceDaily. ScienceDaily, 6 September 2010. <www.sciencedaily.com/releases/2010/09/100906163457.htm>.
Physikalisch-Technische Bundesanstalt (PTB). (2010, September 6). How long does selenium radiate in nuclear waste?. ScienceDaily. Retrieved September 23, 2014 from www.sciencedaily.com/releases/2010/09/100906163457.htm
Physikalisch-Technische Bundesanstalt (PTB). "How long does selenium radiate in nuclear waste?." ScienceDaily. www.sciencedaily.com/releases/2010/09/100906163457.htm (accessed September 23, 2014).

Share This



More Matter & Energy News

Tuesday, September 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Company Copies Keys From Photos

Company Copies Keys From Photos

Newsy (Sep. 22, 2014) — A new company allows customers to make copies of keys by simply uploading a couple of photos. But could it also be great for thieves? Video provided by Newsy
Powered by NewsLook.com
Rockefeller Oil Heirs Switching To Clean Energy

Rockefeller Oil Heirs Switching To Clean Energy

Newsy (Sep. 22, 2014) — The Rockefellers — heirs to an oil fortune that made the family name a symbol of American wealth — are switching from fossil fuels to clean energy. Video provided by Newsy
Powered by NewsLook.com
Raw: SpaceX Rocket Carries 3-D Printer to Space

Raw: SpaceX Rocket Carries 3-D Printer to Space

AP (Sep. 22, 2014) — A SpaceX Rocket launched from Cape Canaveral, carrying a custom-built 3-D printer into space. NASA envisions astronauts one day using the printer to make their own spare parts. (Sept. 22) Video provided by AP
Powered by NewsLook.com
Inside London's Massive Sewer Tunnel Project

Inside London's Massive Sewer Tunnel Project

AP (Sep. 22, 2014) — Billions of dollars are being spent on a massive super sewer to take away London's vast output of waste, which is endangering the River Thames. (Sept. 22) Video provided by AP
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

 

Space & Time

Matter & Energy

Computers & Math

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