What do security improvements aim to achieve in nuclear facilities?

Security improvements in nuclear facilities primarily aim to bolster nuclear security. This involves implementing measures to protect against potential threats, including sabotage, theft, and unauthorized access to nuclear materials and sensitive information. Enhanced security protocols, technology upgrades, personnel training, and strengthened physical infrastructure all contribute to safeguarding nuclear assets.

While the other options may provide certain benefits in different contexts, they do not align with the primary focus of security improvements in nuclear environments. For instance, decreasing operational costs or enhancing design aesthetics might be secondary outcomes but do not relate directly to the core goal of improving security. Similarly, increasing day-to-day transactions is unrelated to enhancing the safety and security frameworks necessary in handling nuclear materials. Thus, the emphasis on bolstering nuclear security ensures a robust defense against risks that could have severe implications for public safety and national security.