ANÁLISIS ACÚSTICO ESTRUCTURAL DE UNA TUBERÍA CONDUCTORA DE VAPOR CON ENFOQUE A PLANTA BWR

Abstract

The economic and social development and technological progress are not possible without a guaranteed supply of energy. As demand grows annually and its production has a major impact on the environment and energy sources are limited, to reach sustainable development is essential to create a strategic energy plan to ensure an adequate supply and promotes efficiency this energy and encouraging wise use into savings, while combining different sources of energy to produce the least possible impact on the environment. Nuclear plants are complex facilities subject to continuous updating and improvement as a result of technological advances that occur endlessly in the fields of engineering and equipment manufacturing. Thanks to new techniques and equipment to significantly reduce the uncertainties of the past, replacing less efficient equipment with more modern and new techniques that allow the execution of the safety analysis of plants with greater precision, it has been amended power level by increasing it in different percentages, depending on the situation and characteristics of each plant. This process has occurred in many countries with nuclear power plants and has been a positive impact, both strategically and technically, environmentally and economically. The increase in nuclear power is held to provide additional system capacity nuclear steam supply and extend the life of the plant. This increase in power do not always get the best known case is the Quad Cities nuclear plant, located on the Mississippi River, about 30 miles northeast of Moline, Illinois. Nuclear Regulatory Commission (NRC, for its acronym in English) granted a license for its two reactors could increase its power in 20 percent of its initial capacity. On March 5, 2002 began the experiment of increasing potential in the Quad Cities plant, where workers reconnected Unit 2 of the grid after an outage for refueling, the plant began to literally shake a dismantling of its parts when operated at a higher level of potential workers to manually turn off the unit 2, after the high vibrations causing leaks in the system of the main turbine control. The concern and confusion increased 18 June 2002, when the measured amount of water droplets contained in the steam produced was about four or five times higher than the values recorded in the past three decades. When this high number doubled during the next two days, operators stopped the experiment increased by reducing the power output of Unit 2 at the level originally built. But the damage was caused. The operators turned off the unit 2 on 11 July 2002 for repairs. The next phase of the experiment began in May 6, 2003, when measuring the number of drops of water into steam again significantly exceeded the normal value acceptable. On May 28, 2003 suspended the experiment operators reduced the power output of Unit 2 below the level originally authorized. Two weeks later, the unit 2 was shut down for other repairs to the steam dryer. In this paper, we make a Structural Acoustic Analysis with the help of various finite element software. The study was performed in the main steam line specifically where the safety valve, being in this place where noise-induced vibration generated by steam causing damage to the panels of the steam dryer Nuclear Reactor BWR (Boiling Water Reactor) of the Laguna Verde Nuclear Power Plant. It is noteworthy that there is not much information on the subject and this project assigned by the National Commission for Nuclear Safety and Safeguards (CNSNS) and National Council for Science and Technology (CONACYT) for processing.