SENSI - A Model Describing the Accumulation and Time-Integration of Radioactive Discharges in Bioindicators (Fucus and Mytilus) Including Seasonal Variation

摘要

The seaweed Fucus vesiculosus and the mussel Mytilus edulis are the most widely used bioindicators for radioactive discharges in coastal zones. The effects of salinity, temperature and light on initial rate of uptake of several radionuclides in Fucus and Mytilus, and long-term loss rates from the same species are reported. Some of these results are utilized in the model SENSI, which describes the accumulation and loss of several radionuclides as a function of month of discharge and month of sampling. The simple concepts behind SENSI are described and its capabilities are demonstrated by comparing calculated concentrations of sup 60 Co, sup 58 Co, sup 65 Zn and sup 54 Mn with measured values in Fucus sampled monthly at the Swedish nuclear power plant Ringhals. Furthermore, the ''sensitivity-matrices'' showing accumulation and time integration month-by-month are given for Fucus. (Atomindex citation 17:006381)