What is the primary purpose of chemical testing for nuclear plant workers?

The primary purpose of chemical testing for nuclear plant workers is to evaluate their physical fitness for duty. This testing is crucial due to the high-stakes environment of a nuclear facility, where safety and operational integrity are paramount. Workers must meet specific physical and mental health standards to ensure they can perform their job responsibilities without impairment. Chemical testing serves as a proactive measure to identify any substance abuse or other factors that could impair an employee's performance, thereby safeguarding not only the worker's health but also the safety of the facility and surrounding community.

While other choices address important aspects of workplace safety and compliance, they do not encompass the specific focus of chemical testing in this context. Ensuring compliance with environmental regulations, confirming medical prescriptions, or assessing mental well-being, although relevant, do not directly align with the primary function of chemical testing in relation to physical duty capability in nuclear facilities.