Patent Number: 
Section: claims

1. A method comprising:preparing a solvent composition which consists essentially of: hydrofluorocarbon as a vehicle for transporting the radioactive substance, wherein said hydrofluorocarbon is C5H2F10, C4H5F5, c-C5H3F7, or C7HF15, and wherein the solvent composition further comprises 3 to 15% by weight of ethanol based on the total weight of the solvent composition; andremoving a radioactive substance using the solvent composition. 2. A method comprising:preparing a solvent composition which consists essentially of: hydrofluorocarbon as a vehicle for transporting the radioactive substance, wherein said hydrofluorocarbon is C5H2F10, C4H5F5, c-C5H3F7, or C7HF15, and wherein the solvent composition further comprises 3 to 15% by weight of alcohol based on the total weight of the solvent composition, the alcohol being selected from the group consisting of: methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and t-butanol, and any mixtures thereof; andremoving a radioactive substances using the solvent composition.