• Nuclear repository watched for radiation
    The Associated Press | February 16,2014
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    CARLSBAD, N.M. — Officials monitored the presence of airborne radiation Saturday at the underground site in southeastern New Mexico where the federal government seals away its low-grade nuclear waste and where a fire earlier this month prompted an evacuation.

    Samples were being taken at the surface after an air monitor detected radiation on the underground levels of the Waste Isolation Pilot Plant around 11:30 p.m. Friday, the U.S. Department of Energy said in a news release.

    No workers were underground at the time, and no contamination, injuries or damage have been reported.

    Energy Department spokesman Roger Nelson said the 139 workers aboveground at the site near Carlsbad were told earlier Saturday to stay where they were as a precaution. None of them tested positive for contamination, and all non-essential personnel were released, Nelson said.

    The surface samples show no contamination has been detected, implying the leak was “not significant,” he said.

    Nelson says the cause of the leak is not known yet. The devices that continuously monitor the air underground reached a threshold level that automatically switches the ventilation system into a filtered mode. He couldn’t quantify the level it takes to trigger the monitors, but says they’re sensitive. He says the monitors have been triggered in the past by radon fluctuations.

    WIPP stores waste that emits alpha and beta radiation, which is in particulate form, so the risk is of inhalation not penetration, he said.

    No one has been underground, and Nelson said he didn’t know when that would happen.

    “We are going to take measurements and make sure we understand it” before sending in a team, he said.

    U.S. Rep. Steve Pearce issued a statement saying, “WIPP has acted quickly and cautiously to ensure the safety of personnel and the local community.”

    The incident comes 10 days after an underground truck fire at the plant prompted an evacuation. Six people were treated for smoke inhalation on Feb. 5.

    Nelson said the fire was in a different part of the site, about 1,000 feet away, from where the radiation was found.

    Asked if the incidents were related, he said, “I just can’t think of a scenario where there would be a relationship.”

    WIPP is the nation’s first and only deep geological nuclear waste repository. It takes plutonium-contaminated waste from Los Alamos National Laboratory and other federal nuclear projects.
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