Quick Answer
Common signs of contamination include visible radioactive particles, unusual radiation readings, and the presence of radioactive isotopes in food and water. These signs can indicate external or internal exposure to radiation. Identifying contamination is crucial for preventing further exposure.
Recognizing External Contamination
External contamination can be identified through visual inspection, radiation detection devices, and Geiger counter readings. Pay attention to particles, dust, or powder on skin, clothing, and surfaces. Use a Geiger counter to scan for radiation hotspots, and take readings in different areas to compare levels. Aim for a reading of less than 0.1 microsieverts per hour (μSv/h) for safe levels. For example, a radiation reading of 1 μSv/h is 10 times higher than the safe level.
Decontamination Techniques
To decontaminate surfaces and objects, use soap, water, and scrubbing brushes to remove radioactive particles. For clothing, use a washing machine and detergent with a high pH level to neutralize radioactive isotopes. Use a Geiger counter to monitor radiation levels before and after decontamination to ensure effectiveness. For example, a 5-minute scrub with soap and water can reduce radiation levels by 50%.
Managing Internal Contamination
Internal contamination can occur through ingestion, inhalation, or skin absorption of radioactive isotopes. If contaminated food or water is ingested, administer potassium iodide (KI) tablets to block thyroid absorption of radioactive iodine. For skin absorption, use soap and water to clean the affected area, and apply a topical decontaminant if necessary. In cases of severe internal contamination, seek medical attention immediately.
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