Sump Strainer Performance Experiments for VVER-440

Abstract

According to the test results the amount of the fibers passing through the strainer filter, as well as the pressure loss over the fiber bed attached on the outer surface of the filter and the fuel assembly model, were at acceptable level.The emergency core cooling systems of NPPs have been equipped with dedicated filters to prevent insulation material fibers and other impurities in the sump water entering to the process in the accident situations. The performance of the Loviisa VVER-440/V213 sump strainer arrangement with different filtering surface types of the strainer was studied experimentally at Lappeenranta University of Technology.