AUSTRALIAN RRRP FIRST SHUTDOWN SYSTEM SEISMICQUALIFICATION

摘要

This paper presents the seismic qualification methodology used for the First Shutdown System of theAustralian Replacement Research Reactor. The seismic qualification was carried out by means of analysis andtesting. The analysis was developed in a first step in order to compute stresses and displacements on themechanisms. In a second step testing was adopted as qualification method with the development of anexperimental setup. The test objective was to demonstrate the effectiveness of the shutdown system under theseismic action imposed by the most demanding seismic event condition used for the design of the reactor. The keyparameter measured during the test was the control plate insertion time, which is the relevant parameter from thenuclear safety standpoint. The seismic analysis showed that no undue stresses or displacements will be present onthe mechanisms for the most demanding seismic condition. Consistently, the test results were that the system isable to insert the control plates within the required time. It was observed that there is no noticeable difference onthe control plate insertion times for the cases with or without the presence of the seismic action.