Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
10B+ZnS(Ag) as an alternative to 3He-based detectors for Radiation Portal Monitors
Year:2016
Research Areas
  • Engineering
Information
Abstract
Typical radiation portal monitor systems, RPM, deployed to detect illicit trafficking of radioactive materials include a set of gamma-ray detectors and neutron detectors. Usually the employed neutron detectors are pressurized 3He-based neutron detectors tubes. Due the shortage of 3He reported since 2009, the amount of 3He available for use in gas proportional counter neutron detectors has become limited, while the demand has significantly increased, especially for homeland security applications. For this reason, many different alternatives are being investigated for its use in RPM systems. The aim of this work is to study a scintillation detector ZnS(Ag) mixed with highly enriched 10B, 10B+ZnS(Ag). Using Monte Carlo methods, MCNPX code, the response of two neutron detectors based on 10B+ZnS(Ag), manufactured by BridgePort Instruments LLC with different geometries, were estimated by calculating the number of 10B(n,?)7Li reactions for 29 monoenergetic neutron sources. Measurements and models were made, and both detectors were compared. The importance of the distance with respect to the ground was studied. The response with a 252Cf moderated neutron source (0.5 cm lead and 2.5 cm polyethylene) was calculated in order to compare with other studied alternatives in the USA by Pacific National Northwest Laboratory, PNNL. With these results we conclude that neutron detectors using 10B+ZnS(Ag) are an interesting alternative for replacing 3He detectors. From the analysis with MCNPX we propose an improvement in the detector design.
International
Si
Congress
13th International Conference on Radiation Shielding (ICRS-13) & 19th Topical Meeting of the Radiation Protection & Shielding Division of the American Nuclear Society -2016 (RPSD-2016)
970
Place
Paris Francia
Reviewers
Si
ISBN/ISSN
Start Date
03/10/2016
End Date
06/10/2016
From page
1
To page
6
13th International Conference on Radiation Shielding (ICRS-13) & 19th Topical Meeting of the Radiation Protection & Shielding Division of the American Nuclear Society -2016 (RPSD-2016)
Participants
  • Autor: Karen Arlet Guzman Garcia (UPM)
  • Autor: Hector Rene Vega Carrillo (Universidad Autonoma de Zacatecas)
  • Autor: Eduardo Florentino Gallego Diaz (UPM)
  • Autor: Juan Antonio Gonzalez Gonzalez (ETSI Caminos canales y puertos UPM)
  • Autor: Alfredo Lorente Fillol (UPM)
  • Autor: Sviatoslav Ibañez Fernandez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ciencia y Tecnología de sistemas avanzados de fisión nuclear
  • Departamento: Ingeniería Energética
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)