So concludes University of Michigan professor Rodney Ewing, who has analyzed just how much nuclear power would need to be produced to significantly reduce greenhouse gas emissions worldwide, and the implications of the associated increase in nuclear power plants. Ewing will present his findings Oct. 23 as the Michel T. Halbouty Distinguished Lecturer at the annual meeting of the Geological Society of America in Philadelphia.
"Usually when people talk about nuclear power as a solution for global warming, the issues of nuclear waste and weapons proliferation are footnotes in the discussion," said Ewing, who is the Donald R. Peacor Collegiate Professor and Chair in the U-M Department of Geological Sciences and also has faculty appointments in the departments of Nuclear Engineering & Radiological Sciences and Materials Science & Engineering. "I think we have to find a way to consider the complete picture when choosing among energy sources."
In an effort to capture that complete picture, Ewing compared carbon-based fossil fuels with nuclear power, considering not only the technologies involved but also the environmental impacts. Similar comparisons have been made between different energy-producing systems, "but in the case of nuclear power, such an analysis is difficult because there are different types of nuclear reactors and there is not a single nuclear fuel cycle, but rather many variants, with different strategies for reprocessing and disposing of nuclear wastes," Ewing said.
His presentation, which considers various fuel cycles, shows that nuclear power generation would need to increase by a factor of three to ten over current levels to have a significant impact on greenhouse gas emissions. "We currently have 400-plus nuclear reactors operating worldwide, and we would need something like 3,500 nuclear power plants," Ewing said.
Developing the necessary nuclear technologies and building the additional power plants is an enormous undertaking that probably would take longer than the 50 years that experts say we have in which to come up with solutions to global warming, Ewing said.
Even if they could be built and brought online quickly, that many power plants would generate tens of thousands of metric tons of additional nuclear waste annually. "The amount that would be created each year would be equal to the present capacity anticipated at the repository at Yucca Mountain," Ewing said, referring to the proposed disposal site in Nevada that has been under study for more than two decades. Ewing recently co-edited a book, "Uncertainty Underground," that reviews uncertainties in the analysis of the long-term performance of the Yucca Mountain repository.
Plutonium created as a byproduct of nuclear power generation also is a concern because of its potential for use in nuclear weapons.
"Not everyone thinks this way, but I consider the explosion of a nuclear weapon to be a pretty large environmental impact with global implications," Ewing said. "A typical nuclear weapon will kill many, many hundreds of thousands of people, and the global impact would be comparable to something like Chernobyl in the spread of fallout."
So the real question, said Ewing, is: "Plutonium versus carbon---which would you rather have as your problem? I don't have the answer, but the points I'm raising are ones I think people need to be considering."
A new indicator for marine ecosystem changes: the diatom/dinoflagellate index
21.08.2017 | Leibniz-Institut für Ostseeforschung Warnemünde
Value from wastewater
16.08.2017 | Hochschule Landshut
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
21.08.2017 | Materials Sciences
21.08.2017 | Health and Medicine
21.08.2017 | Materials Sciences