时间:2024-09-22 05:32:39 来源:网络整理 编辑:行业动态
A new study by researchers at Ohio State University suggests that stainless steel may not be the bes
A new study by researchers at Ohio State University suggests that stainless steel may not be the best choice for containing high-level nuclear waste. By simulating long-term storage conditions, the team found that the storage materials interact with each other more than previously thought, causing them to degrade faster.
The storage of nuclear waste is more than a perennial political football, it is an existential problem. Whatever one's opinions about nuclear power or weapons, there are thousands of tons of nuclear waste temporarily stored around the world, meaning that a way must be found to store it all safely in the long term.
The most important type of nuclear waste is the high-level waste left over from reprocessing nuclear fuel or from nuclear weapon production. Such waste is made up of a complex mixture of radioactive isotopes with half-lives ranging from years to millennia. Though reactors have been operating all over the world for over 75 years, only Finland has started to build a permanent storage facility for such very dangerous waste.
That may show a remarkable lack of political will or even courage, but perhaps this reluctance will turn out to be serendipitous. That's because the favored way of storing high-level waste is to vitrify it. That is, to mix the isotopes with molten glass or ceramics to form a chemically inert mass that can be sealed in stainless steel canisters before being sealed in an underground storage facility.
That plan may now have to change if the Ohio study is correct. Led by Xiaolei Guo, the team took glasses and ceramics and put them in close contact with stainless steel in various wet solutions for 30 days in conditions similar to those that would be found in the proposed US Yucca Mountain nuclear waste repository.
"In the real-life scenario, the glass or ceramic waste forms would be in close contact with stainless steel canisters," says Xiaolei. "Under specific conditions, the corrosion of stainless steel will go crazy. It creates a super-aggressive environment that can corrode surrounding materials."
They found that the steel interacted with the glass or ceramic to produce severe and localized corrosion that both damaged the steel and corroded and cracked the glass and ceramics. According to the team, this is because the iron in stainless steel has a chemical affinity with the silicon in glass, accelerating corrosion.
"This indicates that the current models may not be sufficient to keep this waste safely stored," says Xiaolei. "And it shows that we need to develop a new model for storing nuclear waste."
The research was published in Nature Materials.
Source: Ohio State University
Echo Dot (5th gen) deal — get it for $29.99 at Amazon2024-09-22 04:49
Best Apple MagSafe Duo charger deal: Save $50 at Woot2024-09-22 04:25
3D Game Rendering 1012024-09-22 04:14
OpenAI, Google, Microsoft and others join the Biden2024-09-22 03:45
提前谋划部署准备秋季开学2024-09-22 03:42
顺德出大招:打造全国规模最大预制菜交易中心!2024-09-22 03:39
The Supreme Court’s latest decision is a big fat rebuke to Donald Trump’s Jan. 6 claims.2024-09-22 03:30
S. Korea joins elephant walk during US2024-09-22 03:25
夏凤俭与四川建安工业有限责任公司董事长耿海波座谈2024-09-22 03:24
Best smartphone deal: Get the Samsung Galazy Z Fold 5 for $300 off2024-09-22 03:16
提前谋划部署准备秋季开学2024-09-22 05:18
Wow, scientists discovered dwarf giraffes2024-09-22 04:53
Which politician is the best with babies?2024-09-22 04:45
The Quirkiest Local Landmarks in Small2024-09-22 04:44
The Astounding World of Automata2024-09-22 04:43
TomTom and Microsoft are launching an AI driving assistant2024-09-22 04:41
N. Korea remains unresponsive to inquiries about US service member in custody: state dept.2024-09-22 04:24
Main opposition leader hints to set up satellite parties for election2024-09-22 04:16
How much will PCB's Champions Cup mentors be paid?2024-09-22 03:23
Man locks up girlfriend after getting dumped2024-09-22 03:11