Periodic Surveillance Testing Improvement Approach for the Digital Plant Protection System

Periodic Surveillance Testing (PST) Improvement Project is being performed by Korea Power Eng. Company, Inc. (KOPEC) as a contractor of Korea Hydro and Nuclear Power Co. Ltd (KHNP) together with Westinghouse Electric Company LLC (WEC) as a subcontractor. Plant Protection System (PPS) is not required during normal operation. Thus, the integrity of the PPS shall be confirmed via the periodic tests. However, the testing of Digital Plant Protection System (DPPS) takes too long time compared to that of the analog PPS. The excessive testing time imposes too much burden on the plant operator and could be a cause of human error. Thus, the test improvement for DPPS is needed to reduce the testing time. The improvement approach for the DPPS PST provides the recommended surveillance improvement to make the testing time shorten