Topic overview

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Ionizing radiation can cause DNA strand breaks, base damage, and oxidative stress. The source describes stochastic risk as increasing linearly with dose, with no threshold. Radiation protection therefore emphasizes ALARA: reduce time near a source, increase distance, and use suitable shielding. The topic also covers occupational, public, and pregnancy-related dose guidance; personal dosimetry; and tools for assessing incidents. A key distinction is that contamination involves radioactive material on or in the body, whereas exposure is irradiation without transfer of material. Practical response measures include removing contaminated clothing, gentle washing, and appropriate management of internal contamination. Controlled-area practices, radioactive waste disposal, and sealed-source integrity round out the safety framework.