Iodine-131 Behavior During the TMI-2 Accident. Final Report

摘要

Iodine is one of the elements that are closely watched relative to any release of radioactivity from a nuclear power plant because in an accident it might account for 25% of total health effects, and contribute 40% more toward health effects than any other single isotope. The question is whether iodine is released to the environment in proportion to its availability in the core. Data from the accident at TMI-2 shows that contrary to expectations, licensing codes, and design basis, only very small amounts of iodine escaped to the environment from the reactor containment and auxiliary buildings. The major portion of the iodine apparently has been dissolved and retained in water in the various systems and in the water that is free in the containment. (ERA citation 07:014537)