Measurement and calculation of spatial and energetic neutron flux in the IEA-R1 reactor core
Description
This work presents spatial and energetic flux distribution measured in the IEA-R1 reactor core. The thermal neutron flux was measured by gold activation foils (bare and covered with cadmium) in the fuel element number 108 (reaction: 197Au(n,γ)198Au) at 451W overall reactor power. The fast neutron flux was measured by indium activation foils (reaction: 115In(n,n')115mIn) in the fuel elements number 94 at 4510W overall reactor power. The neutron energy spectrum was adjusted by SAND II code with the data produced by the irradiation of seven activation detectors in the fuel element number 94 at 4510 W overall reactor power. The following reactions were used: 58Fe(n,γ)59Fe, 232Th(n,γ)233Th, 197Au(n,γ)198Au, 59Co(n,γ)60Co, 54Fe(n,p)54Mn, 24Mg(n,p)24Na,47Ti(n,p)47Sc, 48Ti(n,p)48Sc and 115In(n,n')115mIn. The experimental results compared to those obtained by CITATION (spatial distribution flux) and HAMMER (energetic distribution flux) code, showed good agreement. The results presented in this work are a good contribution for a better knowledge of spatial and energetic neutron flux distribution in the IEA-R1 reactor core, besides that the experimental procedure is easily applicable to another situations. (autor)
Availability note (English)
MF available from INIS under the Report Number.Abstract (Portuguese)
Neste trabalho sao apresentadas as medidas da distribuicao espacial e energetica do fluxo de neutrons no nucleo do reator IEA-R1. O fluxo de neutrons termicos foi obtido pela ativacao de folhas de ouro nuas e cobertas com cadmio [reacao:197Au(n,γ)198Au] no elemento combustivel 108 a potencia de 451 W. O fluxo de neutrons rapidos foi obtido pela ativacao de folhas de indio [reacao: 115In (n,n')115mIn] no elemento combustivel 94 a potencia de 4,51 Kw. O espectro de energia dos neutrons foi ajustado pelo codigo SAND II a partir da ativacao de sete detetores no elemento combustivel 94 a potencia de 4,51Kw, atraves das reacoes: 58Fe(n,γ)59Fe, 232Th(n,γ)233Th, 197Au(n,γ)198Au, 59Co(n,γ)60Co, 54Fe(n,p)54Mn, 24Mg(n,p)24Na, 47Ti(n,p)47Sc, 48Ti(n,p)48Sc e 115In(n,n')115mIn. Os valores obtidos experimentalmente foram comparados com os calculados pelos codigos CITATION (distribuicao espacial do fluxo de neutrons) e HAMMER (distribuicao energetica do fluxo de neutrons) que demonstraram reproduzir satisfatoriamente os resultados experimentais. Este trabalho colabora para um melhor conhecimento da distribuicao espacial do fluxo de neutrons no reator IEA-R1, alem de apresentar uma metodologia experimental de facil reproducao. (autor)Files
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Additional details
Additional titles
- Original title (Portuguese)
- Medida e calculo da distribuicao espacial e energetica de neutrons no nucleo do reator IEA-R1
Publishing Information
- Imprint Pagination
- 133 p.
- Report number
- INIS-BR--1684
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 20085652
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- COMPARATIVE EVALUATIONS; GOLD 197 TARGET; GOLD 198; IEAR-1 REACTOR; INDIUM; NEUTRON FLUX; NEUTRON REACTIONS; REACTOR CORES; S CODES; THERMAL NEUTRONS
- Descriptors DEC
- BARYON REACTIONS; BARYONS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; COMPUTER CODES; DAYS LIVING RADIOISOTOPES; ELEMENTARY PARTICLES; ELEMENTS; ENRICHED URANIUM REACTORS; EVALUATION; FERMIONS; GOLD ISOTOPES; HADRON REACTIONS; HADRONS; HEAVY NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; METALS; NEUTRONS; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; NUCLEONS; ODD-ODD NUCLEI; POOL TYPE REACTORS; RADIATION FLUX; RADIOISOTOPES; REACTOR COMPONENTS; REACTORS; RESEARCH AND TEST REACTORS; RESEARCH REACTORS; TARGETS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS