In applying ALARA, which factor is commonly considered alongside dose reduction?

• A. Economic and social factors.
• B. Only regulatory limits.
• C. Color of shielding material.
• D. Time of day of exposure.

Answer: (A)

ALARA aims to reduce exposure as far as reasonably achievable by balancing dose reductions with practical constraints. Alongside lowering dose, economic and social factors are routinely considered—the costs and feasibility of additional shielding, engineering controls, and the potential impact on operations and public concern. If further reductions are too costly or disruptive, a reasonable level is chosen that still meets safety. Regulatory limits matter, but ALARA adds optimization beyond those limits. The color of shielding material or the time of day of exposure have no bearing on this optimization.