Three field surveys were conducted to determine the distribution of nuclear reactor discharge radionuclides along the sediment surface of the Montsweag Bay-Bailey Cove system, the outflow estuary of the Maine Yankee Nuclear Power reactor in Wiscasset, Maine, U.S.A. The observed radionuclides (137Cs, 134Cs, 60Co, 58Co, 54Mn) were deposited in markedly similar patterns. These patterns showed no significant change from survey to survey although a restricting causeway at the north end of the bay was removed between the first and second survey. The measured patterns from one of the surveys were compared with dynamic estuary model calculated patterns. A diffusion-advection equation and an exponential sorption equation were used to model the dispersion of radionuclides and uptake by sediment. The measured patterns of sediment-bound radionuclides agreed with those calculated by the model.
©1980Health Physics Society