HOME >> BIOLOGY >> NEWS
Zirconate material will improve plutonium storage safety

ANN ARBOR---An international research team, led by University of Michigan scientists, has found that gadolinium zirconate is much more resistant to radiation than the ceramic currently being considered for disposal of plutonium from dismantled nuclear weapons in the United States. This highly durable material---a zirconate pyrochlore---is calculated to resist radiation damage for up to 30 million years.

The research team performed a systematic study of the radiation resistance of gadolinium titanate, the ceramic currently proposed for plutonium immobilization, and zirconate compositions. Results indicate that the titanate will be damaged by radiation in less than 1,000 years. The zirconate will not sustain damage for periods up to 30 million years. Considering that plutonium is an environmental contaminant with a radioactive half-life of 24,500 years, the multi-million-year calculation of the zirconate's durability makes it a leading candidate for the immobilization of plutonium.

"This is a significant scientific discovery with major environmental impact for future generations," said Dr. Yok Chen, Program Manager in the Office of Basic Energy Sciences at the U.S. Department of Energy, which funded this research at the University of Michigan and Pacific Northwest National Laboratory (PNNL).

Rodney Ewing, professor of nuclear engineering and radiological sciences at the U-M College of Engineering, and William Weber, a senior staff scientist at PNNL, led the team of researchers that included scientists at the Australian Nuclear Science and Technology Organization and the Indira Gandhi Centre for Atomic Research in India.

The team's findings were first published in the December 1999 Journal of Materials Research (JMR). This past week, another international team of researchers at Los Alamos National Laboratory, working independently from the U-M team, announced similar results with an erbium zirconate ceramic.

The safe disposal of p
'"/>

Contact: Janet Harvey-Clark
janethc@engin.umich.edu
734-647-7087
University of Michigan
10-Aug-2000


Page: 1 2

Related biology news :

1. Environmental costs of home construction lower with wise choice, reuse of building materials
2. Biocompatibility to widen scope of biomaterial applications
3. Design of composite materials that detect terahertz discovered
4. Marine sponges provide model for nanoscale materials production
5. Lens replacement material may improve cataract treatment, eliminate bifocals
6. Nature designs hard and tough materials at the nanoscale
7. In potentially important discovery, scientists find two forms of genetic material chromatin
8. Computer program reveals optimum microstructure for new materials
9. Transforming textbooks: AAAS and partners target K-12 science materials for improvement
10. Bloodworms way with copper likely provides paradigm for new materials
11. Smart materials expand within global marketplace

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Zirconate material will improve plutonium storage safety

(Date:7/22/2014)... genus of planthopper known as Conosimus, which now includes ... in the southern part of the Iberian Peninsula in ... appears in the open-access Journal of Insect Science ... Conosimus baenai , has been named after Manuel ... taxonomy of Iberian Hemiptera. , Conosimus baenai ...
(Date:7/21/2014)... 2014 (Toronto) As part of a multinational, collaborative ... Health (CAMH) have helped identify over 100 locations in ... schizophrenia, in what is the largest genomic study published ... online in Nature , point to biological mechanisms ... to new approaches to treating the disorder, which has ...
(Date:7/21/2014)... of Middle East Respiratory Syndrome coronavirus (MERS-CoV) in the ... the virus. The work, published this week in ... Society for Microbiology, indicates that further studies are needed ... the air. , MERS, a serious viral respiratory illness ... people as of June 11, according to the World ...
Breaking Biology News(10 mins):International team sheds new light on biology underlying schizophrenia 2International team sheds new light on biology underlying schizophrenia 3Middle East Respiratory Syndrome coronavirus detected in the air of a Saudi Arabian camel barn 2
(Date:7/21/2014)... July 21, 2014 Lawrence ... Investment Board (WIB) and Las Positas College (LPC) ... technical education and hands-on training for veterans, officials ... Program at Las Positas is designed to ... for engineering technician careers, and establishes a pipeline ...
(Date:7/21/2014)... (July 21, 2014) The yield so far is ... developed a low-energy, solution-based mineral substitution process to make ... use in electronics and alternative energy devices. , A ... of the July 21 issue of the journal ... research in the inorganic and nuclear chemistry fields. The ...
(Date:7/20/2014)... the process releases radioactive krypton and xenon gases. Naturally ... gas radon. A new porous material called CC3 effectively ... Nature Materials shows how: by breathing enough ... , The CC3 material could be helpful in removing ... air in buildings and also in recycling useful elements ...
(Date:7/18/2014)... LANSING, Mich. , July 18, 2014  Neogen ... Stephen Snyder , Neogen,s chief operating officer and ... said he will work as a consultant going forward ... Snyder has been in this position since ... be fulfilled by James Herbert , who has ...
Breaking Biology Technology:Engineering Program Established for Veterans 2Engineering Program Established for Veterans 3Oregon chemists eye improved thin films with metal substitution 2A noble gas cage 2A noble gas cage 3
Cached News: