What dosimetric units are commonly used to monitor air emissions and liquid releases?

What dosimetric units are commonly used to monitor air emissions and liquid releases?

• A. Bq/m3 for air; Bq/L for liquids
• B. Gy for air; Gy for liquids
• C. Sv for air; rem for liquids
• D. Curies for air; liters for liquids

Answer: (A)

Environmental monitoring of air and liquid releases uses activity concentration to express how much radioactivity is present per unit volume. The appropriate SI unit for activity is the becquerel (Bq), which counts disintegrations per second. For air, this is given as Bq per cubic meter, since you're dealing with a gas in a volume of air. For liquids, you report Bq per liter, showing the activity concentration in the liquid. This focus on activity concentration is why the other options don’t fit. Energy dose units like gray measure energy deposited and aren’t used to quantify how much radioactive material is released. Dose-equivalent units like sievert or rem relate to potential biological effect, not environmental concentration. While curies are an activity unit, SI units (Bq) are standard, and mixing a volume unit alone (liters) without a concentration measure isn’t suitable.

Environmental monitoring of air and liquid releases uses activity concentration to express how much radioactivity is present per unit volume. The appropriate SI unit for activity is the becquerel (Bq), which counts disintegrations per second. For air, this is given as Bq per cubic meter, since you're dealing with a gas in a volume of air. For liquids, you report Bq per liter, showing the activity concentration in the liquid.

This focus on activity concentration is why the other options don’t fit. Energy dose units like gray measure energy deposited and aren’t used to quantify how much radioactive material is released. Dose-equivalent units like sievert or rem relate to potential biological effect, not environmental concentration. While curies are an activity unit, SI units (Bq) are standard, and mixing a volume unit alone (liters) without a concentration measure isn’t suitable.