Iodine prophylaxis and nuclear accidents.

Area of Science:

• Nuclear Chemistry
• Radiological Protection
• Public Health

Background:

• Radioactive iodine isotopes present significant risks during nuclear accidents due to their volatility and mobility.
• The thyroid gland is the critical organ for iodine accumulation and damage.
• Stable iodine, primarily potassium iodide (KI), can block thyroid uptake of radioiodine.

Purpose of the Study:

• To review the experiences and practices of using potassium iodide (KI) for thyroid protection.
• To inform decision-making regarding KI prophylactic programs in Croatia for nuclear emergencies.
• To highlight the need for effective KI stockpiling and distribution strategies.

Main Methods:

• Review of existing studies and international guidelines on radioiodine thyroid protection.
• Analysis of the effectiveness and timing of potassium iodide administration.
• Examination of recommendations from organizations like the International Atomic Energy Agency (IAEA).

Main Results:

• Potassium iodide (KI) administration is a proven method to block thyroid uptake of radioiodine.
• The timing of KI administration is critical; delayed or improper timing can be ineffective or harmful.
• The IAEA recommends KI prophylaxis when the avertable thyroid dose exceeds 100 mGy.

Conclusions:

• Potassium iodide (KI) is a vital tool for thyroid protection against radioiodine exposure.
• The implementation of KI prophylactic programs requires careful consideration of timing, stockpiling, and distribution logistics.
• Developing a robust national strategy for KI use is essential for nuclear emergency preparedness in Croatia.