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Title: Neutron detection of the Triga Mark III reactor, using nuclear track methodology

Nuclear Track Methodology (NTM), based on the neutron-proton interaction is one often employed alternative for neutron detection. In this paper we apply NTM to determine the Triga Mark III reactor operating power and neutron flux. The facility nuclear core, loaded with 85 Highly Enriched Uranium as fuel with control rods in a demineralized water pool, provide a neutron flux around 2 × 10{sup 12} n cm{sup −2} s{sup −1}, at the irradiation channel TO-2. The neutron field is measured at this channel, using Landauer{sup ®} PADC as neutron detection material, covered by 3 mm Plexiglas{sup ®} as converter. After exposure, plastic detectors were chemically etched to make observable the formed latent tracks induced by proton recoils. The track density was determined by a custom made Digital Image Analysis System. The resulting average nuclear track density shows a direct proportionality response for reactor power in the range 0.1-7 kW. We indicate several advantages of the technique including the possibility to calibrate the neutron flux density measured at low reactor power.
Authors:
;  [1] ; ;  [2] ;  [3]
  1. Instituto de Física, Universidad Nacional Autónoma de México Circuito de la Investigación Científica, Ciudad Universitaria. México, DF (Mexico)
  2. Instituto Nacional de Investigaciones Nucleares (Mexico)
  3. Universidad Simón Bolivar, Laboratorio de Física Nuclear, Caracas (Venezuela, Bolivarian Republic of)
Publication Date:
OSTI Identifier:
22488683
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1671; Journal Issue: 1; Conference: 11. international symposium on radiation physics, Ciudad Juarez (Mexico), 4-6 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CONTROL ELEMENTS; ENRICHED URANIUM; FLUX DENSITY; IMAGE PROCESSING; IRRADIATION; NEUTRON DETECTION; NEUTRON FLUX; NEUTRONS; NUCLEAR FACILITIES; PARTICLE TRACKS; PLEXIGLAS; PROTON-NEUTRON INTERACTIONS; PROTONS; RECOILS; TRIGA TYPE REACTORS