Determinación de la concentración de gas radón - 222 en la mina subterránea Promine Cia. Ltda de la cooperativa de producción minera aurífera "Bella Rica" en el cantón Camilo Ponce Enríquez de la provincia del Azuay

Abstract

The present investigation aimed to determine the concentration of gas activity Radon-222 (Rn-222) in the underground mine Promine Cia. Ltda. Of the mining production cooperative “Bella Rica" in Camilo Ponce Enriquez canton, located in Azuay Province. To evaluate the effective inhalation dose of (Rn-222) in the company; and check the possible places where there is greater concentration. Using cameras from Electret Ions (EIC). As a result, it was obtained that with respect to the concentration of (Rn-222) there is a high concentration at the point called (Salt Front) equal to (1182 ± 61.92 Bq/m3), two of the points studied have a low concentration of (Rn- 222), these are the so-called points: (Boca Mina) and (20 m from the Emily intersection). The contribution The average external gamma radiation at the annual effective dose is (0.084 ± 0.003 mSv/year),while the effective dose due to radon inhalation, calculated with the concentration radon, is (3.47 ± 0.14 mSv/year), the values obtained in the investigation are lower than the permissible limits set by the ICRP, concentration maximum of 1600 Bq/m3 and an effective dose limit of 20 mSv/year for enclosures, without However, compared to the EPA recommended values of 300 Bq/m3 , the value of concentration found in (Front of the Salosa) is approximately 4 times higher. It is recommended continuous ventilation within the work area, in addition to carrying adequate protection against possible inhalation of (Rn -222).