The operators scan safety significant parameters; if automatic trip or relief should have taken place, operating procedures will have operators take action.

• A. Emergency operating procedures / Operator action
• B. Alarm response procedures
• C. Abnormal operating procedures
• D. Normal operating procedures

Answer: (D)

Normal operation relies on operators continually monitoring safety-significant parameters and taking actions within established normal operating procedures when automatic protective actions should have occurred but did not. These procedures cover the manual steps needed to verify trip or relief status and to restore plant conditions within the standard operating framework. Alarm Response Procedures are for handling and diagnosing alarms, Abnormal Operating Procedures address non-nominal conditions that aren’t immediately safety-critical, and Emergency Operating Procedures are invoked for events requiring rapid, structured protective actions. In this scenario, the operator’s action follows Normal Operating Procedures, guiding how to respond when automatic safeguards should have acted.