Monitoring of atmospheric emission of alpha emitters radionuclides at a nuclear fuel cycle facility in RJ, Brazil
DOI:
https://doi.org/10.15392/bjrs.v9i1A.1559Palabras clave:
environmental Radioprotection, Alpha emitter, nuclear fuel cicleResumen
The Indústrias Nucleares do Brasil S/A (INB) in Resende, state of Rio de Janeiro, operate with open sources containing alpha emitters. This operation produces particulate material in the air. To reduce this impact, the plant operates with negative pressure using an exhaust equipment. Exhaust air is sent to an absolute filter system. In the exhaust stack, there is an alpha emitter detection module that operates monitoring the releases. Following the dose calculation model established by the National Commission for Nuclear Energy (CNEN), the authorized limit is fixed at 1.2∙107 Bq.y-1 of alpha emitters by Nuclear Fuel Factory (FCN). The present work aims to evaluate the alpha-emitting radionuclides released by FCN in terms of total release (Bq) and activity concentration (AC, Bq∙m-3). In 2018, FCN released 1.41∙106 Bq.y-1(i.e. 34% of the 2016 releases). The largest mean for AC was 2.04 mBq∙m-3. The release data was almost an order of magnitude lower than the annual release limit, proving the adequation of the atmospheric effluents to the licensing requirements.Descargas
Referencias
IAEA - INTERNATIONAL ATOMIC ENERGY AGENCY, Environmental and Source Monitoring for Purposes of Radiation Protection, Safety Guide, No. RS-G-1.8, Vienna, Austria, IAEA, 2005. 136 p.
—, Generic models for use in assessing the impact of discharges of radioactive substances to the environment, SSR-19, Vienna, Austria, IAEA, 2011a. 229 p
—, Meteorological and hydrological hazards in site evaluation for nuclear installations, safety guide, no. SSG-18, Vienna, Austria, IAEA, 2011b. 172 p.
—, Safety of nuclear fuel cycle facilities, safety standards series, No. NS-R-5, Vienna, Austria, IAEA, 2014b. 123 p.
——, Monitoring and surveillance of radioactive waste disposal facilities, safety standards series, no. SSG-3.1, Vienna, Austria, IAEA, 2014c. 96 p
Pereira et al., Release of alpha emitters into the environment by nuclear industries of Brazil in Resende, Brazilian Journal of Radiation Science, vol. 7 N. 28, 2019, https://doi.org/ 10.15392/bjrs.v7i2B.411
Berthold, Alpha-Beta Particulates Monitor LB 150 D-R. User manual, access in file:///C:/Users/1520/Downloads/brochure_lb150_d-r_lb9000_ldm_rev02_dec_2010_e% 20(2).pdf. 15/09/2019
Rosner, B. (2000). Fundamentals of Biostatistics, Duxbury Thomson Learning ed. Fifth edition, 792 pp.
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