| Revista: | Brazilian journal of physics |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000336879 |
| ISSN: | 0103-9733 |
| Autores: | Zangirolami, Dante Marco1 Oliveira, Arno Heeren de2 Ferreira, Andrea Vidal1 |
| Instituciones: | 1Comissao Nacional de Energia Nuclear, Centro de Desenvolvimento da Tecnologia Nuclear, Belo Horizonte, Minas Gerais. Brasil 2Universidade Federal de Minas Gerais, Departamento de Energia Nuclear, Belo Horizonte, Minas Gerais. Brasil |
| Año: | 2010 |
| Periodo: | Mar |
| Volumen: | 40 |
| Número: | 1 |
| Paginación: | 47-51 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, teórico |
| Resumen en inglés | The TRIGA IPR-R1 nuclear reactor at the Centro de Desenvolvimento da Tecnologia Nuclear CDTN/CNEN, Belo Horizonte, Brazil, has three irradiation facilities: a rotary specimen rack outside the reactor core with 40 irradiation channels which provide large scale isotope irradiation; the central tube placed at the center of the reactor core which permits sample irradiation with maximum neutron flux, as well as neutron beam extraction; a pneumatic transfer tube which makes possible the analysis of short half-life radioisotopes. The aim of this work is to evaluate the thermal and epithermal neutron fluence rates in the three irradiation facilities of the IPR-R1. Al-0.1%Au reference materials were irradiated bare and Cd-covered, at 100 kW thermal power, and gamma spectrometry was applied with an HPGe detector. For the rotary specimen rack, the values obtained for thermal and epithermal neutron fluence rates are (8.2 ± 0.2) × 1011n.cm−2.s−1 and (3.5 ± 0.1) × 1010n.cm−2.s−1, respectively. For the pneumatic transfer tube and the central tube, epithermal neutron fluence rate values are respectively (3.3 ± 0.2) ×109n.cm−2.s−1 and (2.6 ± 0.1) x 1011n.cm−2.s−1. For these facilities, thermal neutron fluence rate values are (2.5 ± 0.2) × 1011n.cm−2.s−1 and (2.8 ± 0.1) × 1012n.cm−2.s−1, respectively. Knowledge of these parameters will be fundamental in the planning of sample irradiation for analysis or radioisotope production in a more accurate way |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Física nuclear, Reactores nucleares, Neutrones, Irradiación, Brasil |
| Keyword: | Physics and astronomy, Nuclear physics, Nuclear reactors, Neutrons, Irradiation, Brazil |
| Texto completo: | Texto completo (Ver PDF) |
