Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
THERMAL ANALYSIS OF TUBES TAMPONING IN CONDENSERS OF A PWR NUCLEAR POWER PLANT
Submission Author:
Ana Raquel de Almeida Santos , RJ , Brazil
Co-Authors:
Ana Raquel de Almeida Santos, Luiz Chaves, LUIS RIBEIRO, GERSON RONELLI
Presenter: Luiz Chaves
doi://10.26678/ABCM.ENCIT2018.CIT18-0829
Abstract
In nuclear power plants, Condensers are heat exchangers responsible to turn all the steam exhausted from turbines into saturated liquid, due to the sea water heat transfer, which occurs inside of these equipment. During the operation, could be needed the tamponing of Condensers damaged tubes, avoiding contamination of the secondary fluid with salt water. The objective of this work is performing a thermal analysis of PWR nuclear power plant Condensers and identify the negative aspects of the tamponing a part of its tubes. For this, a bibliographic review was carried out contemplating some concepts of thermodynamics, heat transfer and fluid mechanics. Then, was considered and analyzed the Brazilian nuclear power plants. For Angra 1, the average fluid enthalpy was identified as 1,820.49 kJ/kg at Condenser inlet and 160.76 kJ/kg at the outlet. For Angra 2, the average fluid enthalpy was identified as 2,258.50 kJ/kg at Condenser inlet and 169.09 kJ/kg at the outlet. After initial calculations, the thermal power of secondary circuit, after tamponing, was analyzed. The tubes tamponing decreases the heat transferred along the condenser, increasing the pressure inside the equipment. This causes a reduction of the general efficiency of the power plant.
Keywords
Nuclear power plant, Secondary Circuit, condenser, tubes analysis, tamponing
