Watchdog Design for Improvement of the Kartini Reactor Protection System

The aging problem and the scarcity of components on the control computer at the Kartini reactor are the main factors for the revitalization process. With these problems, some functions in the Kartini reactor are not running according to design, and one of them is the watchdog system of the control computer (slave PC). The watchdog system plays a role in monitoring the failure of the control computer if there is a hang during the operation process. If there is a hang on the computer, the watchdog system will actuate the reactor protection system in the form of a reset system and TRIP (reactor shutdown). However, the system is only able to actuate the reset system while the TRIP system is run manually. In this study, a watchdog system was designed to monitor the performance of PLC and LabVIEW-based control computers. Testing is based on the output signal specifications of the control computer used and the quality of the output signal. Based on the test results, it can be seen that the system is able to read the hang and generate a delay signal to actuate TRIP.