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Four workers received small external doses, SNS outage started early after ‘pressure transient’

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An aerial view of the Spallation Neutron Source at Oak Ridge National Laboratory. (Photo by ORNL)

Note: This story was updated at 12 p.m. July 19.

Four workers received small external radiation doses and a planned outage of the Spallation Neutron Source was started a few days early after an unexpected “pressure transient” in March, according to Oak Ridge National Laboratory.

The low radiation dose levels (less than 25 millirem) were well below the regulatory threshold of 5,000 mrem annual exposure, which was established to protect worker safety, ORNL said in June.

The pressure transient occurred in the SNS mercury loop. When radiation was detected, ORNL staff closed off the affected area and reviewed workers’ dosimeters.

“Readings showed four workers received small external doses, none more than 25 millirem,” ORNL said.

For comparison, a chest x-ray produces a radiation dose of about 6 mrem; a mammogram about 13 mrem, and a head and chest CT scan is 1,100 mrem[1].

[Read more…]

(For members) Y-12 class could be added to worker compensation program based on thorium, Pu-241 exposure

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The sign at the main entrance to the Y-12 National Security Complex is pictured above on Sunday, Aug. 6, 2017. (Photo by John Huotari/Oak Ridge Today)

The sign at the main entrance to the Y-12 National Security Complex is pictured above on Sunday, Aug. 6, 2017. (Photo by John Huotari/Oak Ridge Today)

The sign at the main entrance to the Y-12 National Security Complex is pictured above on Sunday, Aug. 6, 2017. (Photo by John Huotari/Oak Ridge Today)

A new class of Y-12 employees could be added to a federal worker compensation program based on exposure to radiation from thorium metal parts and plutonium-241 isotopes between 1958 and 1976, health officials said.

The worker compensation program involves certain illnesses and work at sites like Y-12 that are affiliated with the U.S. Department of Energy.

The program is a result of the Energy Employees Occupational Illness Compensation Program Act, which was enacted in October 2000. The act includes what is known as the Special Exposure Cohort. The new class of Y-12 employees could be part of that Special Exposure Cohort.

That designation would allow eligible claimants to be compensated without the complete reconstruction of a radiation dose or a determination of the probable cause. A covered employee would have to have at least one of 22 specified cancers.

The class of employees being evaluated now would have worked at Y-12 between January 1, 1958, through December 31, 1976, when Y-12 was manufacturing nuclear weapons components during the Cold War. The employees would have had an aggregate total of at least 250 work days, according to a notice published in the Federal Register this month. The class could change, however, based upon the evaluation.

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New class of Y-12 employees being evaluated for worker compensation program

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Y-12 Aerial Photo June 2012

The Y-12 National Security Complex in Oak Ridge is pictured above in June 2012. (Photo courtesy NNSA)

 

A new class of employees at the Y-12 National Security Complex is being evaluated for possible inclusion in a worker compensation program that involves certain illnesses and work at sites affiliated with the U.S. Department of Energy.

The class of employees being evaluated now would have worked at Y-12 between January 1, 1958, through December 31, 1976, and they would have had an aggregate total of at least 250 work days, according to a notice published in the Federal Register on Friday. The class could change, however, based upon the evaluation.

The decision to evaluate the petition for the Y-12 employees was announced by the National Institute for Occupational Safety and Health, which is part of the Centers for Disease Control and Prevention in the U.S. Department of Health and Human Services.

It’s not clear when the petition was filed, who filed it, or how long the evaluation might take. Oak Ridge Today has requested more information from the CDC. [Read more…]

DOE: National labs, including ORNL, helped found study of ecology

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Ecologist Dan Nelson hauling in a gill net as part of the fish population survey of the Clinch River Study. (Photo by Oak Ridge National Laboratory via U.S. Department of Energy)

Ecologist Dan Nelson hauling in a gill net as part of the fish population survey of the Clinch River Study. (Photo by Oak Ridge National Laboratory via U.S. Department of Energy)

 

Researchers at federal sites such as Oak Ridge National Laboratory first developed many of the concepts and tools that ecologists still use today, according to the U.S. Department of Energy.

“The study of ecology is likely to evoke images of recycling signs or the ‘blue marble’ Earth from space associated with the environmental movement of the 1960s,” the U.S. Department of Energy Office of Science said in an article published online on June 28. “But in reality, ecology as a field largely developed to meet the need to monitor radioactive contamination in the Atomic Age.”

The federal government had a major knowledge gap after World War II, according to the article, which was written by Shannon Brescher Shea, senior writer/editor in DOE’s Office of Science. Specifically, the United States government needed to know more about the consequences of nuclear weapons use and production, from the effects of fallout to waste disposal.

The Atomic Energy Commission’s national laboratories were logical places to answer these questions, the article said. [Read more…]

Balajee named director of Cytogenetic Biodosimetry Lab at REAC/TS

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Adayabalam Balajee

Adayabalam Balajee

Research scientist brings more than 20 years of laboratory expertise to the position

Adayabalam Balajee has been named the director of the Cytogenetic Biodosimetry Laboratory, which is operated as part of the Radiation Emergency Assistance Center/Training Site, or REAC/TS, at the Oak Ridge Institute for Science and Education.

In his new position, Balajee will manage the operations and staff at the CBL, which is one of only two labs in the U.S. where chromosome abnormality analysis is used for ionizing radiation dose assessment, a press release said. The process for this analysis starts with a blood sample from someone who a physician thinks may have been exposed to radiation.

Prior to joining the CBL, Balajee held the position of research scientist at the Center for Radiological Research, Department of Radiation Oncology at Columbia University Medical Center in New York, where he had been employed since 1999. Balajee also spent five years as a visiting fellow at the Gerontology Research Center at the National Institutes of Health in Baltimore. [Read more…]

Dainiak named director of REAC/TS

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Nicholas Dainiak

Nicholas Dainiak

Radiation response specialist has more than 35 years of medical expertise

Nicholas Dainiak has been named director of the Radiation Emergency Assistance Center/Training Site, or REAC/TS, at the Oak Ridge Institute for Science and Education.

A deployable asset of the U.S. Department of Energy, REAC/TS provides 24/7 emergency medical response for incidents involving radiation anywhere in the world, a press release said. REAC/TS also provides direct support for the National Nuclear Security Administration’s Office of Emergency Operations and the Federal Radiological Monitoring and Assessment Center, or FRMAC.

Adding to its depth of radiation response and consultation capabilities, REAC/TS is uniquely qualified to teach medical personnel, health physicists, first responders, and occupational health professionals about radiation emergency medicine, the release said. REAC/TS also operates an acytogenetic biodosimetry laboratory, one of only two in the U.S., where chromosome aberration analysis is used for ionizing radiation dose assessment. [Read more…]

Four workers evaluated, released after electrical fire at Toxco

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Oak Ridge Fire Department Fire Engine at Toxco

The Oak Ridge Fire Department responded to a small, intense electrical fire on Thursday morning at Toxco, a company that processes low-level radioactive waste. The fire was in a one-story metal building at the back of the company’s site on Flint Road.

 

Four workers were evaluated for minor respiratory issues and released after a small, intense electrical fire was reported at a company that repackages low-level radioactive waste in central Oak Ridge on Thursday morning, authorities said.

The fire at Toxco Materials Management Center on Flint Road was reported at about 11:03 a.m. Thursday. It was in a large one-story metal building at the back of the site, said Marty Griffith, Oak Ridge Fire Department battalion chief.

Electrical equipment inside the building was on fire, and the only way to put it out was to disconnect power, which the Oak Ridge Electric Department did, Griffith said. He said the area where the fire occurred is used to repackage waste, and it is fed by 440 volts of electricity.

Once the power was disconnected, firefighters were able to put out the fire with fire extinguishers. [Read more…]

DOE program funds alloy research led by UT; ORNL collaborates

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Haixuan Xu

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…]

Inadequate shielding exposed workers to excess radiation at MMC imaging center, lawsuits allege

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Methodist Medical Center

Methodist Medical Center of Oak Ridge

Methodist Medical Center says it will ‘vigorously’ refute allegations

Note: This story was last updated at 3:38 p.m.

Five lawsuits filed in Anderson County on Monday allege that X-ray and radiologic technologists, including two who were pregnant, were exposed to excess radiation for several years at Methodist Medical Center because some walls in and around a radiology imaging center in the new emergency department were built without the required lead shielding, elevating the workers’ risk of health problems, including cancer.

The five lawsuits allege the walls in the emergency department, which opened in February 2006 as part of a hospital remodel, did not have the required protective radiological shielding because of building, design, and inspection errors.

Lead-lined walls are required in radiological areas to limit radiation exposure under local and federal regulations and construction and health standards, the lawsuits say.

But the defendants—Covenant Health of Knoxville, Rentenbach Engineering Co. of Knoxville, and TEG Architects LLC of Jeffersonville, Ind.—failed to have qualified personnel survey or check the installation and construction parameters, or conduct proper barrier determinations for lead barrier thickness, to ensure that the walls in the radiological areas would adequately reduce scatter and leakage radiation, the lawsuits say. The defendants also failed to have qualified personnel certify that the MMC in-department imaging center and nearby areas were built in compliance with all applicable regulations and guidelines so that the plaintiffs “would only be exposed to levels of radiation that were as low as reasonably achievable, all before allowing work to be done at that facility.” [Read more…]

ORNL establishes Liane B. Russell Distinguished Early Career Fellowship

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Liane B. Russell

Liane B. Russell

With the goal of expanding opportunities for early career researchers, Oak Ridge National Laboratory has established a research award in the name of its most acclaimed woman scientist.

The Liane B. Russell Distinguished Early Career Fellowship is intended to attract a diverse work force of scientists and engineers who have demonstrated outstanding scientific ability and research interests that align with the U.S. Department of Energy and ORNL research missions.

The competitive, three-year fellowship is aimed toward establishing long-term research careers at ORNL, a press release said. In the spirit of ORNL’s groundbreaking female geneticist, Russell, these fellowships will be available to outstanding scientists and engineers who have received their doctorate degrees within the past seven years, with emphasis given to attracting women and minority candidates. [Read more…]

On Senate floor, Alexander honors nuclear workers, Bill Wilcox, Calutron Girls

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U.S. Senator Lamar Alexander

Lamar Alexander

Sen. Lamar Alexander spoke on the floor of the U.S. Senate on Wednesday in honor of nuclear weapons program workers. Among those he honored were Bill Wilcox and the Calutron Girls.

Wilcox was a Manhattan Project veteran, former technical director at the K-25 site and Y-12 National Security Complex, and Oak Ridge city historian.

Wednesday was the fifth annual National Day of Remembrance for nuclear weapons program workers. It had been recognized under a resolution that Alexander cosponsored earlier this year.

Here are the senator’s full remarks: [Read more…]

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

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Steve Zinkle

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…]