A simple mathematical model of a nuclear reactor, which consists of only six nonlinear differential equations, was formulated. Using this model, a digital program for predicting the dynamic response of the loss-of-fluid-test (LOFT) reactor was developed. In addition, the application of a model-based Kalman filtering technique was considered.
Results of the model calculation by the developed program were compared with the estimation results as well as those from actual test data taken during the anticipated transient without scram (ATWS) of LOFT. The comparison demonstrates the simple model's phenomenological accuracy and the applicability of the estimation algorithm to nonlinear dynamic system. As well, the dependence on some parameters of the state estimation technique was investigated.
단지 6 개의 미분방정식으로 구성된 원자로 모델을 이용하여 원자로의 동적응답을 예측하기 위한 디지탈프로그램을 개발하였으며 원자로의 상태추정에 칼만필터기법을 응용하였다. 개발된 프로그램에 의한 계산결과와 상태추정 결과를 LOFT원자로의 가상사고 실험에서 얻어진 측정치와 비교하여 단순화시킨 모델의 현상학적 정확성과 상태추정기법의 비선형계통의 응용가능성을 확인하였으며 상태추정기 법에 영향을 미치는 관련변수들에 대한 종속성도 검토되었다.