Computation Of The Residual Radionuclide Activity Within Three Natural Waterways At The Savannah River Site Page: 3 of 14
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WM2014 Conference, March 2-6, 2014, Phoenix, AZ, USA
outlined in red in Figure 1. Each watershed contains facilities and outfalls, as well as
waste units in various stages of the remediation process that may represent a potential
impact to the associated IOU depending on groundwater and surface water flow paths.
Their headwaters occur in the central part of SRS and they flow southwestward to where
each discharges into the Savannah River. Various SRS operating facilities are located
near the headwaters or mid-sections of these streams and are the source of various
discharges which contributed to the buildup of residual radioactivity in stream sediments.
The scope of this effort included the evaluation of sampling and analysis data that
existed at the time of the previous inventory estimate, as well as the additional
streambed and floodplain sampling and analysis data acquired afterwards as part of the
ongoing SRS environmental restoration program, and specifically for the FMB, PB, and
SC IOUs. While Cs-137 is the most significant and abundant radionuclide associated
with the three IOUs, it is not the only radionuclide present; hence the scope includes
evaluating all radionuclides present and includes an evaluation of inventory uncertainty
for use in sensitivity and uncertainty analyses. The scope also involved evaluation of the
radionuclide inventory associated with the sediments of L-Lake, which is an
impoundment constructed on SC and is part of SC IOU.
r Up Thifre Rn
(Sawannih River ule - J
} fl aI Lowe( Th ro Rujns
i' 3t401 Crvk
Figure 1 Location of FMB, PB and SC Watersheds at SRS
Description of FMB, PB AND SC Integrator Operable Units
FMB originates near the center of SRS and follows a southwesterly direction for
approximately 24 km (15 mi). The watershed drains about 57 km2 (22 mi2) and includes
all or parts of several SRS facilities: all of C-Area (C Reactor), virtually all of N-Area
(Central Shops), and those parts of F-, H- and E-Areas (General Separations Area) and
the Solid Waste Disposal Facility that lie south of the groundwater divide separating
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Hiergesell, R. A. & Phifer, M. A. Computation Of The Residual Radionuclide Activity Within Three Natural Waterways At The Savannah River Site, article, January 7, 2014; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc865176/m1/3/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.