표준형 원전 주급수 Venturi Fouling 현상 및 대책 연구

Abstract

This study described the feedwater flow-based reactor thermal power(FWBSCAL) thermal power calculation methodology as well as nuclear power plants’ main phenomena that the calculated reactor thermal power is evaluated smaller than the real case due to fouling of foreign materials in feedwater flow venturi when an existing thermal power calculation methodology, FWBSCAL is used in Korean standard nuclear power plants as operating time passes during operation. In addition, it explained the main stream flow-based thermal power(MSBSCAL) methodology as a new reactor thermal power calculation method to solve problems of FWBSCAL. It also established the measurement formula of main steam flow mass to calculate thermal power by using main stream flow instead of feedwater flow and the empirical formula for determining input factors of the measurement formula, and described conservatism of a new methodology. This study lastly described main phenomena of nuclear power plants to solve feedwater flow venturi fouling of Koran standard nuclear power plants according to the introduction of MSBSCAL.