Iodine Speciation and Partitioning in PWR Steam Generator Accidents. Final Report.

摘要

Measurements of iodine speciation in aqueous solution at 285 C and 1000 psig show a higher percentage as I2 in solutions at tracer concentrations than at higher concentrations. A 1 x 10 (sup -9) M iodide ion (-1) solution resulted in 2% I2 whereas a 1 x 10 (sup -4) M iodide ion (-1) solution had only 0.1% I2. Tests of primary coolant from operating reactors had a peak in percent I2 at shutdown, with an increase in volatile species up to 20% of the total iodine. During normal power operation, primary coolant percent I2 was generally lower than the detection limit.