The correct answers are A and C because ITPM (Inspection, Testing, and Preventive Maintenance) focuses on verifying performance and ensuring ongoing reliability of safety-critical equipment , not on design requirements.

Option A is correct because functional testing is essential to confirm that the valve operates as intended under real or simulated conditions. In this case, the valve must open quickly enough to effectively quench the reaction, meaning both functionality and response time are critical performance criteria.

Option C is also correct because CCPS emphasizes that safety-critical systems must be periodically inspected and tested at appropriate intervals to ensure they remain reliable. This includes not only the valve itself but also its control system , such as sensors and logic that trigger the action.

Option B and D are design considerations, not ITPM activities. While they are important during the design phase (e.g., ensuring fail-safe positioning or proper sizing), they do not fall under inspection and maintenance requirements.

CCPS highlights that ITPM ensures that protective systems continue to function as intended throughout their lifecycle , reducing the risk of failure during demand condition