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OAK RIDGE NATIONAL LABORATORY FOR THE U.S. DEPARTMENT OF ENERQY Department of Energy Oak Ridge National Laboratory Post Office Box 2008 POST OFFICE BOX 2008 OAK RIDGE. TENNESSEE 37831 - 8280 Oak Ridge, Tennessee 37831-6269 BOX Ne. Notification of Planned Radiotracer Studies - Oak Ridge National Laboratory East and West Forks Walker Branch This letter notifies the Department of Energy (DOE) that research personnel a t Oak Ridge National Laboratory (ORNL) plan to release small amounts of radiotracers into the East and West Forks of Walker Branch on the Oak Ridge Reservation. The first release will occur approximately 250 meters (m) upstream of the West Fork Walker Branch weir and the remaining releases will occur approximately 200 m upstream of the East Fork Walker Branch weir, The purpose of the experiment is to study phosphorus uptake and cycling and the effects of hydraulic characteristics and metabolism in streams. While this release is not a wastewater discharge and the amount of radiotracers involved is very small, notification of the release to the Tennessee Department of Environmental and Conservation (TDEC) is prudent. The radiotracers in each study will include approximately 5 millicuries (mCi) of tritium (H-3)as water ad 1.5 mCi of phosphorus-33 (P-33) as phosphate and will be released over a two-hour period. The attached table summarizes the approximate concentrations of these radiotracers during the studies. The DOE Derived Concentration Guideline stated in DOE Order 5400.5 for H-3 is 2000 x lo-' mCi per All personnel involved in these studies will be trained in the safe use of radionuclides, will wear appropriate protective clothing, and will be monitored by a Health Physicist during the experiment. Human Subjects Project
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Dr. Ronald 0. Hultgren 2 December 6, 1993 Please forward this information to TDEC a t the following address. Division of Water Pollution Control Tennessee Department of Environment 401 Church Street, 14th Floor, L&C Tower If you have any questions, please contact W. D. Goddard at 576-5749. Safety, and Health
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