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ORNL investigating elevated radiation in HFIR cooling system

Posted at 11:02 pm November 21, 2018
By John Huotari Leave a Comment

The High Flux Isotope Reactor vessel at Oak Ridge National Laboratory resides in a pool of water illuminated by the blue glow of the Cherenkov radiation effect. (Photo courtesy ORNL)

The High Flux Isotope Reactor vessel at Oak Ridge National Laboratory resides in a pool of water illuminated by the blue glow of the Cherenkov radiation effect. (Photo courtesy ORNL)

 

Oak Ridge National Laboratory is investigating an elevated radiation level in the cooling system at the High Flux Isotope Reactor, a research reactor that also produces isotopes.

Workers were bringing HFIR back online on Tuesday, November 13, after a planned outage when the elevated radiation level was detected in the cooling system, according to information provided by David Keim, ORNL communications director.

“HFIR operators decided to shut down the reactor in order to investigate and determine what happened,” Keim said. “The plant is in a safe condition.”

No workers received any exposure, and there was no residual contamination outside the primary system, Keim said. Radiation detection equipment around the building and throughout the ORNL campus showed normal background levels, he said.

Keim said HFIR had just started a a new cycle when the issue was discovered.

“The operators proactively decided to shut HFIR down well before the plant advanced to a condition prompting automatic shutdown,” Keim said. “The laboratory is investigating the cause.”

More information will be added as it becomes available.

The reactor pool is pictured above in the reactor bay inside the High Flux Isotope Reactor at Oak Ridge National Laboratory on Thursday, March 15, 2018. Spent nuclear fuel is stored inside the pool. (Photo by John Huotari/Oak Ridge Today)

The reactor pool is pictured above in the reactor bay inside the High Flux Isotope Reactor at Oak Ridge National Laboratory on Thursday, March 15, 2018. Spent nuclear fuel is stored inside the pool. (Photo by John Huotari/Oak Ridge Today)

 

The High Flux Isotope Reactor at Oak Ridge National Laboratory. (Photo courtesy U.S. Department of Energy/ORNL)

The High Flux Isotope Reactor at Oak Ridge National Laboratory. (Photo courtesy U.S. Department of Energy/ORNL)

 

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Filed Under: Front Page News, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: David Keim, elevated radiation level, HFIR, High Flux Isotope Reactor, Oak Ridge National Laboratory, ORNL, shutdown

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