Radioactive high level waste sludge is vitrified into glass at the Savannah River Site Defense Waste Processing Facility (DWPF). Prior to acceptance into DWPF, each sludge batch is characterized for an extensive series of radionuclides per the requirements of the Waste Acceptance Product Specifications (WAPS) and the DWPF. Based on the characterization results, radionuclides meeting specific screening criteria are identified as being 'reportable.'For sludge batch 7a (SB7a), twenty-five radionuclides were deemed reportable based on the criterion of contributing = 0.01 % of the total curie content over the 1100 year period from 2015 to 3115 and having half-lives = 10 years. These radionuclides included Ni-59, Ni-63, Se-79, Sr-90, Zr-93, Nb-93m, Tc-99, Sn-126, Cs-137, Sm-151, Th-229, U-233, U-234, U-238, Np-237, Pu-238, Pu-239, Pu-240, Pu-241, Pu-242, Am-241, Am-243, Cm-244, Cm-246, and Cf-251.A summary of the radiochemical methods, radioanalytical results, and decay/in-growth modeling for the SB7a WAPS assessment will be presented.

Reportable radionuclides in DWPF sludge batch 7a

244th National Meeting (2012)

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