Crews at the Dresden nuclear plant have been working to secure a leak of tritiated water detected over the weekend. Sampling on Saturday turned up elevated tritium levels in a single test well near a contaminated water storage tank, according to Exelon and a report filed with the Nuclear Regulatory Commission. The leak was confined to plant grounds. Exelon notified the state of Illinois that the sampling showed tritium at 1.3 million picocuries per liter. That exceeds the NRC's limit for release into the environment, which is 1 million pCi/L. In a release, Exelon said Monday that crews have worked around the clock to excavate the area around the tank, identify the leak and repair it. Testing also found low levels of tritium in a waste water treatment facility. The plant southwest of Chicago operates two General Electric boiling water reactors completed in 1970 and 1971 that each generate about 870 megawatts.
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