Observatorio de I+D+i UPM

Memorias de investigación
Ponencias en congresos:
Characterization of an 241AmBe neutron irradiation facility by different spectrometric techniques
Áreas de investigación
  • Fisica rp -- fisica de la radiacion,
  • Fisica nx -- fisica nuclear experimental
An automated panoramic irradiator with a 3 Ci 241Am-Be neutron source is installed in a bunker-type large room at the Universidad Politécnica de Madrid (UPM). It was recently modified and a neutron spectrometry campaign was organized to characterize the neutron fields in different measurement points along the irradiation bench. Four research groups working with different Bonner Sphere Spectrometers (BSS) and using different spectral unfolding codes took part to this exercise. INFN?LNF used a BSS formed by 9 spheres plus bare detector, with cylindrical, almost point like, 6LiI(Eu) scintillator (4 mm x 4 mm, from Ludlum); UAZ-UPM employed a similar system but with only 6 spheres plus bare detector; UAB worked with a 3He filled proportional counter at 8kPa filling pressure, cylindrical 9 mm x 10 mm (05NH1 from Eurisys) with 11 spheres configuration; and CIEMAT used 12 spheres with an spherical 3He SP9 counter (Centronic Ltd., UK) with very high sensitivity due to the large diameter (3.2 cm) and the filling pressure of the order of 228 kPa. Each group applied a different spectral unfolding method: INFN and UAB worked with FRUIT ver. 3.0 with their own response matrixes; UAZ-UPM used the BUNKIUT unfolding code with the response matrix UTA4 and CIEMAT employed the GRAVEL-MAXED-IQU package with their own response matrix. The paper shows the main results obtained in terms of neutron spectra at fixed distances from the source as well as total neutron fluence rate and ambient dose equivalent rate H*(10) determined from the spectra. The latter are compared with the readings of a common active survey-meter (LB 6411). The small differences in the results of the various groups are discussed.
Nombre congreso
13th International Congress of the International Radiation Protection Association (IRPA-13)
Tipo de participación
Lugar del congreso
Glasgow (Reino Unido)
Fecha inicio congreso
Fecha fin congreso
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Título de las actas
13th International Congress of the International Radiation Protection Association. Actas compeltas en la web del Congreso: http://www.irpa13glasgow.com/
Esta actividad pertenece a memorias de investigación
  • Autor: Eduardo Florentino Gallego Diaz (UPM)
  • Autor: Alfredo Lorente Fillol (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Ciencia y Tecnología de sistemas avanzados de fisión nuclear
  • Departamento: Ingeniería Nuclear
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