What is meant by 'integration testing' for NANTeL with other safety systems?

• A. Testing the interaction between core protection and other plant safety systems to ensure cohesive, safe operation across interfaces.
• B. Testing only the core protection in isolation.
• C. Testing external systems without core protection.
• D. No testing required.

Answer: (A)

Integration testing checks how NANTeL’s protection logic communicates and coordinates with other plant safety systems. It verifies end-to-end behavior across interfaces, ensuring signals, interlocks, alarms, and trip actions flow correctly and that timing and sequencing preserve safety. This kind of testing confirms that when one system detects a condition, the others respond as intended and no unsafe interactions occur. Therefore, the best description is testing the interaction between core protection and other plant safety systems to ensure cohesive, safe operation across interfaces. Other options miss critical coordination: testing only the protection in isolation ignores interfaces; testing external systems without the protection layer neglects integration; and no testing is unsafe.