열성능 진단시험을 통한 영광1,2호기 발전소 2차 계통 효율 증대방안 분석 연구

Abstract

ABSTRACT

A study on the efficiency improvement of the plant secondary System in NPP #1,2 by thermal performance diagnostics test

Kim, Chun Ho Adviser : Prof. Song, Jong Soon, Ph. D. Department of Nuclear Engineering, Graduate School of Chosun University

Nuclear energy has been evaluated to be environmentally-friendly and economical. Thus, Korea is also now operating 23 nuclear power plants and plans additional construction of 9 units up to 2022. Since nuclear energy is an unfinished alternative with issues to be solved including a high initial investment, a high social expense for site selection, a low social acceptance and the waste problem, however, it is not easy to meet the explosively-increasing electricity demand by constructing new power plants. Therefore, optimization though the efficiency improvement of unit devices or peripheral devices for current power plants may in part contribute to meeting the energy demand. The ultimate objective for the Thermal Performance Test of generation facilities is to help make an economical decision on the optimization of power plant operation by understanding the degree of degradation due to operation of relevant facilities, and establishing a maintenance plan on the basis of the degradation information. In the precision thermal-performance diagnostic test at unit 1 of Yeonggwang Nuclear Power Plant, a preliminary test was conducted to confirm if the test conditions are satisfied, and then a total of 7 tests based on the classification of 2 real tests at 100 % load and reference tests (TR04, TR05, TR06, TR07) were followed and the thermal performance of the turbine cycle was measured. This paper was prepared to improve the availability of nuclear power plants and secure the economics by diagnosing the degradation state of each facility due to the long-term operation for unit 1 of Yeonggwang Plant and proposing the system analysis and method for optimum operation of the facilities.