Avaliación de la Acústica Ocupacional en una Grande Hidroeléctrica: estudio de caso en la ITAIPU - BINACIONAL

• Autores: Carlos Manuel Yorg Rojas
• Localización: Revista de acústica, ISSN-e 0210-3680, Vol. 37, Nº. 3-4, 2006, págs. 24-32
• Idioma: español
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• Resumen

  • This paper presents environmental noise evaluation in Hydropower project. In this case was done one hundred and one sound pressure level measurements of working point. Where the greater availability of the worker as far as time of exposition during the maintenance. The 25% of measurements have presented values equal or greater to 85 dB(A), and 81 % was equal or greater to 65 dB(A). From the evaluation of the Noise in the field can be declared, the hydropower has places where the sound level pressure is higher than of 85 dB(A), being this value the limit for security for worker health, according to the Brazilian Norm - NR15 in its ANNEXED 1, whereas according to the Norm of Occupational Hygienic NHO-01 and Norm NBR 10152 Levels of Noise for acoustic comfort, of Brazil, establish 65 dB(A) like value acceptable limit for the comfort in agreement to the Norm NR17. It was carried out analysis of the different types from Individual Protective Equipment used in the company. Adopted the criteria established by the Norm DIN-EN-458 giving as result that the used auricular protectors in the company fulfill the Norms of Individual Security. The maintenance's work groups are equal and permanent, not exist rotation of activity due to the specialization of each employee executing the maintenance. This permanence of activity induces the worker to be exposed systematically at such levels of sound pressure level when period of labor is extend to more than 8 hours per day due to repairs with restrictions of execution times. Hydropower with 700 MW capacity of generate precise an excellent maintenance planning, but the principal problem became from environmental noise. The most reclamation from worker is to use earplug. The future hydropower project could resolve these problems.