輕水爐 原電 主蒸氣 流量 變化에 따른 熱出力 硏究

국문 초록 (Abstract)

현행 주급수유량 기반의 열출력 계산 방법을 주급수 벤츄리의 파울링 현상과 무관한 주증기 유량 기반의 열출력 계산 방법에 대한 연구 논문임

다국어 초록 (Multilingual Abstract)

The current feedwater mass flow measurement has experienced the venturi fouling which causes erroneous high flow indications. The high flow indication leads to high reactor thermal power indication and, as a result, causes plant operators to reduce real power output in order to maintain plant power below licensed power(100%).
One of the effective remedies to this venturi fouling is considered to be an independent steam flow measurement because it is not susceptible to fouling problem.
A mathematical mass flow equation was developed based on the steam flow rate in a similar way to the feedwater-flow-based power calculation method.
Parallel indications of both powers give a continuous indication of potential fouling problem. The main steam-flow-based power monitoring is expected to enhance the core power monitoring capability.
The development project includes the review of the thermal power operation and design features, the development of main steam flow calibration methodology and operator procedure, and preliminary uncertainty evaluation to determine the feasibility of the method.
Results of the Study are summarized as below;
A mathematical steam mass flow rate equation has been developed to be implemented in the reactor thermal power calculation for OPR1000 plants.
The basic inputs to mass flow equation have been determined and main steam flow calibration procedure has been developed for use in the plant by the operators.
Uncertainty evaluation of main steam-flow-based power showed less than 1.5% at 95 % confidence level which is well within the acceptance criteria.
The COLSS power calculation algorithm was modified to implement the main steam-flow-based power calculation. The modified COLSS program was installed in the nuclear plant plant to verify the operating performance for a certain period of testing.

목차 (Table of Contents)

• 1. 서론 1
• 1.1 연구 필요성 1
• 1.2 연구 배경 3
• 1.3 연구 목적 및 내용 4
• 2. 이론적 고찰 5
• 2.1발전소 유형별 열출력 운전 및 설계 특성 5
• 2.2 국외 발전소 열출력 운전 및 설계 특성 10
• 2.3 주증기 유량 교정 방법 15
• 3. 분석 및 고찰 31
• 3.1 COLSS 프로그램 수정 31
• 3.2 주증기유량을 이용한 열출력 발전소 적용 47
• 4.결론 61