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OAK RIDGE NATIONAL LABORATORY MANAGED LIY M*RI1N MARIETTA ENERQY SYSTEMS. INC. FOR THE U.S. DEPARTMENT OF ENERQY POST OFFICE Box 1008 '' Dr. Ronald 0. Hultgren, Deputy Assistant Manager Department of Energy, Oak Ridge Operations &A; v . Post Office Box 2008 Oak Ridge, Tennessee 37831-6269 Notificationof Planned Radiotrauzr Studies - Oak Ridge National Laboratoly Walker Branch This letter serves as notification to the Department of Energy (DOE) that during a series of experimental releases. research personnel at Oak Ridge National Laboratory (ORNL) plan to release small amounts of radiotracers into East Fork Walker Branch, approximately 100 meters upstream from the weir, and in a first order reach of West Fork Walker Branch. The purpose of the study is to determine the effect of hydraulic conditions and stream algae on phosphorus cycling in the stream. While these releases are not wastewater discharges, and the amount of radiotracers involved is very small, notification of the releases to the Tennessee Department of Environment and Conservation The radiotracers in the Walker Branch studies will include approximately 5 milli-curies (mci) of tritium (H-3) as water and 1.5 mCi of phosphorus-33 (P-33) as phosphate and will be released over a 2-hour period. The attached table summarizes the approximate concentrations of these radiotracers during the studies. The DOE Derived Concentration stated in DOE Order 5400.5 for H-33 is 2000 x 10' mCiL and for P-33 is 200 x 10" mCi/L. 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. Please forward this information to TDEC at the following address. Division of Water Pollution Control Tennessee Department of Environment 401 Church Street, 14th Floor, L&C Tower If additional information is required, please contact W. D. Goddard at 576-5749 or C. K.Valentine at 574-8775. and Health Compliance Human Sub j ect s Project
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