Define ALARA and its application in BEA radiation safety.

• A. As Low As Reasonably Achievable; apply by minimizing exposure time, maximizing distance, and using shielding.
• B. As Loud As Reasonably Avoidable; minimize noise exposure.
• C. As Light As Readily Acceptable; increase exposure.
• D. All Levels Are Readily Assessed; monitor only.

Answer: (A)

ALARA means As Low As Reasonably Achievable. In BEA radiation safety, it means actively working to keep radiation doses from sources of exposure as low as possible while still allowing the necessary work, considering economic and social factors. Put into practice, this involves three core controls: reducing the time spent near the source, increasing the distance from the source, and using appropriate shielding to attenuate the radiation. In addition to these, a BEA program uses broader protection methods like engineering controls (barriers, containment), administrative controls (procedures, training, exposure monitoring) and continuous dose assessment to ensure exposures stay at or below the lowest reasonably achievable levels. The chosen option captures both the definition and the practical application of ALARA, whereas the other choices mix in unrelated concepts (like noise), advocate increasing exposure, or suggest monitoring alone without taking steps to minimize dose.