Subscribe free to our newsletters via your
  Energy News  




Subscribe free to our newsletters via your




















CIVIL NUCLEAR
Coatings for nuclear fuel preventing explosions in reactors, developed at TPU
by Staff Writers
Tomsk, Russia (SPX) May 18, 2017


A thin film coating is no more than two microns thick. Image courtesy Tomsk Polytechnic University.

Physicists from Tomsk Polytechnic University are creating protective titanium nitride-based coatings for shells of fuel elements (fuel rods) of nuclear reactors. Such shells can significantly reduce hydrogenation of containers in which nuclear fuel is placed, extend their service life and protect reactor from explosion like at the Fukusima radiation disaster.

"In reactors nuclear fuel is laid in special "tubes" out of zirconium alloys, to form fuel rods. In the fuel rods, a nuclear reaction takes place. As a result of radiolysis of a reactor coolant - water, and also as a result of interaction of the coolant and zirconium under high temperatures hydrogen is released. Hydrogen is able to accumulate in fuel rods shells causing degradation of their mechanical properties and destruction," clarifies one of the developers, an assistant at the Department of General Physics Egor Kashkarov.

According to the young scientist, the danger of interaction of zirconium and water is the higher temperature in the reactor is, the more hydrogen is released. For example, the same happened at the Fukusima-1 station in Japan: due to flooding of pumping equipment the active zone of the reactor warmed up to more than 1,200 C, a steam-zirconium reaction proceeded swiftly and a large amount of hydrogen was released. The explosion of accumulated hydrogen was one of the biggest radiation accidents in the world.

The scientific team from the TPU Department of General Physics is creating protective titanium nitride-based coatings that will be a barrier protecting zirconium fuel rods from water and hydrogen accumulation.

"During tests titanium nitride has proved itself well: it has high hardness, wear resistance, heat resistance and inertia. We also found that it protects well from hydrogen penetration into the material, what is critical for nuclear energy. The coatings can reduce hydrogen penetration in zirconium alloy," adds Egor Kashkarov.

The coatings on zirconium substrate are applied using two technologies: magnetron sputtering and vacuum arc deposition. The both processes are carried out on a set-up created in the university. The result is a thin film coating - no more than two microns thick.

"One of the applications of the elaborating coatings out of titanium nitride is next generation reactors and thermal nuclear reactors where hydrogen impermeable coating is a pressing issue. In the next generation reactors, temperature is supposed to increase up to 400-450 C to improve fuel burn-up efficiency. Consequently, hydrogenation of fuel rods will be here much faster. Our coatings are able to prevent it," says the developer.

Research paper

CIVIL NUCLEAR
Japan restarts another reactor
Tokyo (AFP) May 17, 2017
A Japanese utility on Wednesday switched on a nuclear reactor, the latest to come back in service despite deep public opposition in the aftermath of the Fukushima crisis. Japan shut down all of its dozens of reactors after a powerful earthquake in March 2011 spawned a huge tsunami that led to meltdowns at the Fukushima nuclear plant, causing the world's worst such accident since Chernobyl in ... read more

Related Links
Tomsk Polytechnic University
Nuclear Power News - Nuclear Science, Nuclear Technology
Powering The World in the 21st Century at Energy-Daily.com

Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

CIVIL NUCLEAR
Triple play boosting value of renewable fuel could tip market in favor of biomass

Insight into enzyme's 3-D structure could cut biofuel costs

Microbial fuel cell converts methane to electricity

A full life cycle assessment of second-generation biofuels

CIVIL NUCLEAR
NRL Tests Autonomous 'Soaring with Solar' Concept

EU SmartFlex project finishes reference solar facade

InnoEnergy-backed Solaris Offgrid raises 1M Euro to tackle global electricity poverty

Beaumont Solar Announces the Beaumont "Big C" Services Unit to Solar Industry

CIVIL NUCLEAR
Scientists track porpoises to assess impact of offshore wind farms

Dutch open 'world's largest offshore' wind farm

OX2 will manage a 45 MW wind farm owned by IKEA Group in Lithuania

Building Energy celebrates the beginning of operations and electricity generation of its first wind farm

CIVIL NUCLEAR
Australia power grid leased to local-foreign consortium

Poland central to EU energy diversification strategy

Myanmar recovery linked to development of electrical grid

U.S. emissions generally lower last year

CIVIL NUCLEAR
Advancing next-generation Stable, safe, smart, sustainable batteries

Photocatalyst makes hydrogen production 10 times more efficient

Physicists discover that lithium oxide on tokamak walls can improve plasma performance

Laser pulses reveal the superconductors of the future

CIVIL NUCLEAR
Vietnam arrests activist as MP resigns over mass fish deaths

Plastic trash chokes remote South Pacific island

Mining brings Chile city riches -- and fear of cancer

'Excess' car pollution killed 38,000 in 2015: study

CIVIL NUCLEAR
Dallas Fed: Oil and gas sector recovery apparent

April production from Norway down from March by 2 percent

UN envoy slams deadly attack in Libya's south

U.S. posture on Iran a threat to oil development

CIVIL NUCLEAR
Mars Rover Opportunity Begins Study of Valley's Origin

Opportunity Reaches 'Perseverance Valley'

Ancient Mars impacts created tornado-like winds that scoured surface

Seasonal Flows in Valles Marineris




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement