nuclear reactors Archives - Oak Ridge Today

ORNL consortium working on nuclear reactors names director

Posted at 12:40 pm September 3, 2018
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David Kropaczek directs the Consortium for Advanced Simulation of Light Water Reactors, U.S. a Department of Energy Innovation Hub headquartered at Oak Ridge National Laboratory. (Photo by ORNL)

A consortium that is based at Oak Ridge National Laboratory and works on next-generation commercial nuclear reactors has named a director.

David J. Kropaczek will lead the Consortium for Advanced Simulation of Light Water Reactors, which is based at ORNL, a U.S. Department of Energy laboratory.

CASL, which launched in 2010 as DOE’s first Energy Innovation Hub, has brought together the nation’s supercomputing facilities and leading nuclear experts and institutions to pursue an aggressive 10-year mission—to predict the performance of existing and next-generation commercial nuclear reactors through comprehensive, science-based modeling, and simulation, a press release said. [Read more…]

ORNL technique could set new course for extracting uranium from seawater

Posted at 1:41 pm December 17, 2015
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Using high-energy X-rays, researchers discovered uranium is bound by adsorbent fibers in an unanticipated fashion. (Image by ORNL)

An ultra-high-resolution technique used for the first time to study polymer fibers that trap uranium in seawater may cause researchers to rethink the best methods to harvest this potential fuel for nuclear reactors.

The work of a team led by Carter Abney, a Wigner Fellow at the U.S. Department of Energy’s Oak Ridge National Laboratory, shows that the polymeric adsorbent materials that bind uranium behave nothing like scientists had believed. The results, gained through collaboration with the University of Chicago and detailed in a paper published in Energy and Environmental Science, highlight data made possible with X-ray Absorption Fine Structure spectroscopy performed at the Advanced Photon Source. The APS is a DOE Office of Science User Facility at Argonne National Laboratory.

“Despite the low concentration of uranium and the presence of many other metals extracted from seawater, we were able to investigate the local atomic environment around uranium and better understand how it is bound by the polymer fibers,” Abney said. [Read more…]

DOE program funds alloy research led by UT; ORNL collaborates

Posted at 3:40 pm September 11, 2014
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Haixuan Xu

KNOXVILLE—An international research team led by an assistant professor at the University of Tennessee in Knoxville has received a grant to help with work involving a key component of nuclear reactors.

The U.S. Department of Energy grant is worth $800,000 over three years, and it has been awarded to UT Assistant Professor Haixuan Xu. It’s part of the Nuclear Energy University Programs funding and will be used to work on a pair of particular steel alloys, a press release said.

“Getting support on this will allow us to investigate and understand the defect evolution in these materials,” said Xu, of the UT Department of Materials Science and Engineering. “What we hope to gain is fundamental insight into the effects of radiation on the alloys so that we can better predict and detect how they will break down over time and adjust the materials accordingly.”

The alloys in question would be used in sodium-cooled reactors. Xu’s research is important because little is known about how the materials stand up to high levels of radiation over time. [Read more…]

NNSA marks 10th anniversary of Global Threat Reduction Initiative

Posted at 12:54 am May 31, 2014
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Frank Klotz

WASHINGTON, D.C.—The National Nuclear Security Administration on Thursday marked the 10th anniversary of the Global Threat Reduction Initiative, GTRI. Since the Sept. 11 attacks, reducing the threat of terrorist acquisition of nuclear or radiological material has been a core mission of NNSA, and it is a mission that will continue into the future.

“The Global Threat Reduction Initiative’s history demonstrates how seriously we take this mission and our commitment to fulfilling President Obama’s nuclear security agenda,” said U.S. Department of Energy Under Secretary for Nuclear Security and NNSA Administrator Frank G. Klotz. “However, the threat to national and global security from state or terrorist acquisition of nuclear and radiological materials is far from gone, and our focus now is on addressing the substantial threats that remain.”

GTRI, an NNSA nuclear nonproliferation program, works with partners around the world to reduce and consolidate global stockpiles of highly enriched uranium, or HEU, and plutonium, and to secure dangerous radiological sources both at home and abroad. GTRI and its predecessor programs have removed and secured more than enough material for 980 nuclear weapons and tens of thousands of radiological dirty bombs by converting HEU research reactors and isotope production facilities to the use of low enriched uranium, or LEU; removing or confirming disposition of HEU and plutonium; and securing nuclear and radiological sites around the world. [Read more…]

Lecture to focus on whether small reactors can rejuvenate nuclear power

Posted at 12:30 pm November 17, 2013
By Oak Ridge Today Staff 1 Comment

Kent Williams

A retired distinguished staff member at Oak Ridge National Laboratory will discuss Thursday evening whether small modular nuclear reactors, such as the one proposed in west Oak Ridge, can rejuvenate nuclear power.

The presentation by Kent Williams starts at 7 p.m. Thursday in the Fellowship Hall at First Presbyterian Church in Oak Ridge.

Many people in the nuclear industry say that small modular reactors, or SMRs, are key to a revitalized nuclear industry in the U.S. and overseas because of their projected market, safety, and economic characteristics, a press release said. One SMR plant has been proposed at the former Clinch River Breeder Reactor site in west Oak Ridge. [Read more…]

UT names nuclear materials expert as 13th UT-ORNL Governor’s Chair

Posted at 2:11 pm August 28, 2013
By University of Tennessee Leave a Comment

Steve Zinkle

KNOXVILLE—Steve Zinkle, an authority on the effect of radiation on materials in fission and fusion nuclear reactors, has been named the thirteenth University of Tennessee–Oak Ridge National Laboratory Governor’s Chair.

Zinkle will serve as Governor’s Chair for Nuclear Materials, based in the department of nuclear engineering at UT with a complementary appointment in materials science and engineering. He begins at UT on Oct. 1. [Read more…]

Nuclear goes Hollywood: New film sheds light on old debate

Posted at 5:47 pm July 24, 2013
By Oak Ridge National Laboratory 9 Comments

Jeff Binder, Oak Ridge National Laboratory’s associate lab director of nuclear science and engineering, answers an audience question during a panel discussion following a screening of “Pandora’s Promise” in Knoxville on Saturday. (Submitted photo)

By Scott Jones

About 300 people attended a showing of the new pro-nuclear film “Pandora’s Promise” and heard a panel discussion about nuclear energy on Saturday, including perspectives from Oak Ridge National Laboratory staff.

The lab worked with Regal Entertainment Group to bring the film to the Downtown West theater from July 19-25.

Few phrases carry the ideological weight of the words “nuclear power.” [Read more…]

DOE award could lead to small nuclear reactors in Oak Ridge

Posted at 7:14 pm November 20, 2012
By John Huotari Leave a Comment

Note: This story was updated at 8:12 p.m.

Four small nuclear reactors could be built on the Clinch River in west Oak Ridge in about a decade under a federal award announced Tuesday.

In its announcement, the U.S. Department of Energy said it will invest up to half of the total cost of the project to design, license, and help commercialize the new small modular reactors, or SMRs. The investment will come through a five-year cost-sharing agreement.

The project will be led by The Babcock & Wilcox Co, which is headquartered in Charlotte, N.C., and has a business unit that oversees the Y-12 National Security Complex in Oak Ridge. The company’s partners on the SMR project are Bechtel and the Tennessee Valley Authority.

[Read more…]