Specific induced activity profile at the rotary specimen rack of IPR-R1 TRIGA reactor

Zangirolami, Dante Marco; Ferreira, Andréa Vidal; Oliveira, Arno Heeren de

doi:10.1590/s0103-97332009000300002

Cited by 3 publications

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References 6 publications

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“…Previous work [3] had revealed that the specific induced activity of samples in the RSR has a fluctuation of approximately 2% for samples irradiated on different dates. In order to check variations of thermal and epithermal neutron fluence rates, bare and Cadmium-covered probes were irradiated in the selected irradiation channels on different dates.…”

Section: Rotary Specimen Rackmentioning

confidence: 99%

“…The current core configuration, from 2001, permits operations at a maximum steady-state power of 250 kW [2]. Our previous work [3] on the present core configuration evaluated the specific induced activity profile at the RSR and its variation under different irradiation conditions. For the actual core configuration, there are few experimental works concerning the characterization of the thermal and epithermal neutron fluence rates in IPR-R1 irradiation facilities.…”

Section: Introductionmentioning

confidence: 99%

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Thermal and epithermal neutron fluence rates in the irradiation facilities of the TRIGA IPR-R1 nuclear reactor

Zangirolami¹,

Oliveira²,

Ferreira³

2010

Braz. J. Phys.

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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) × 10 11 n.cm −2 .s −1 and (3.5 ± 0.1) × 10 10 n.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) ×10 9 n.cm −2 .s −1 and (2.6 ± 0.1) x 10 11 n.cm −2 .s −1 . For these facilities, thermal neutron fluence rate values are (2.5 ± 0.2) × 10 11 n.cm −2 .s −1 and (2.8 ± 0.1) × 10 12 n.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.

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Section: Rotary Specimen Rackmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%