Investigations on the Improvement of the Iodine Filtration Concept of Pressurized Water Reactors

In two pressurized water reactors (PWRs), the chemical laboratory hood exhaust and the annulus exhaust have been found to account for most of the radiologically critical elemental ¹³¹I released to the environment during normal operation. Passing these exhausts through iodine filters would constitute a considerable improvement of the iodine filtraion concept of PWRs.