Use of neutron coincidence counters for the estimation of fissile content in irradiated material

Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

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Use of neutron coincidence counters for the estimation of fissile content in irradiated material. / Rossa, Riccardo; Boogers, Eric; Borella, Alessandro; Boden, Sven; Broeckx, Wouter; Noynaert, Luc; van der Meer, Klaas.

International Workshop on Numerical Modelling of NDA Instrumentation and Methods for Nuclear Safeguards. European Safeguard Research and Development Association, 2018.

Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

Harvard

Rossa, R, Boogers, E, Borella, A, Boden, S, Broeckx, W, Noynaert, L & van der Meer, K 2018, Use of neutron coincidence counters for the estimation of fissile content in irradiated material. in International Workshop on Numerical Modelling of NDA Instrumentation and Methods for Nuclear Safeguards. European Safeguard Research and Development Association, 2018 - NDA, Luxembourg, Luxembourg, 2018-05-16.

APA

Rossa, R., Boogers, E., Borella, A., Boden, S., Broeckx, W., Noynaert, L., & van der Meer, K. (2018). Use of neutron coincidence counters for the estimation of fissile content in irradiated material. In International Workshop on Numerical Modelling of NDA Instrumentation and Methods for Nuclear Safeguards European Safeguard Research and Development Association.

Vancouver

Rossa R, Boogers E, Borella A, Boden S, Broeckx W, Noynaert L et al. Use of neutron coincidence counters for the estimation of fissile content in irradiated material. In International Workshop on Numerical Modelling of NDA Instrumentation and Methods for Nuclear Safeguards. European Safeguard Research and Development Association. 2018

Author

Rossa, Riccardo ; Boogers, Eric ; Borella, Alessandro ; Boden, Sven ; Broeckx, Wouter ; Noynaert, Luc ; van der Meer, Klaas. / Use of neutron coincidence counters for the estimation of fissile content in irradiated material. International Workshop on Numerical Modelling of NDA Instrumentation and Methods for Nuclear Safeguards. European Safeguard Research and Development Association, 2018.

Bibtex - Download

@inproceedings{26b85e7d560042c4bd08afa660f40aa9,
title = "Use of neutron coincidence counters for the estimation of fissile content in irradiated material",
abstract = "Neutron coincidence counters based on 3He proportional counters have been widely used for the detection of fissile material in applications such as nuclear safeguards, security, and decommissioning. Recently, SCK•CEN purchased two used Canberra WM3400 neutron coincidence counters in the frame of the initial characterization process for the decommissioning of historical sodium loops. Several so-called In-Pile Sections (IPS) were irradiated in the BR2 reactor at SCK•CEN during 1970-1980’s to study the rupture of fast reactor fuel in accidental conditions. The section of the IPS containing the original fuel pins was already removed from the SCK•CEN site for further R&D activities, but the residual fissile material in the remaining part, containing the loop components, needs to be quantified in order to determine the strategy for segmentation, conditioning and transportation. This contribution focuses on the initial testing of the detectors to verify their correct operation. A Monte Carlo model of the detector was developed with the MCNPX-PoliMi code, and a comparison between experiments and simulation results have been conducted. Measurements with a 252Cf source were carried out and the point model equations were applied to calculate the detector efficiency and die-away time. The initial testing confirmed the operating conditions recommended by the manufacturer, although the Totals and Reals rates estimated with Monte Carlo simulations were approximately 6{\%} and 18{\%} larger than the measured values. In addition, a strong sensitivity to gamma-rays was observed in a series of experiments.",
keywords = "neutron coincidence counting, Monte Carlo, safeguards, decommissioning",
author = "Riccardo Rossa and Eric Boogers and Alessandro Borella and Sven Boden and Wouter Broeckx and Luc Noynaert and {van der Meer}, Klaas",
note = "Score=3",
year = "2018",
month = "5",
day = "16",
language = "English",
booktitle = "International Workshop on Numerical Modelling of NDA Instrumentation and Methods for Nuclear Safeguards",
publisher = "European Safeguard Research and Development Association",

}

RIS - Download

TY - GEN

T1 - Use of neutron coincidence counters for the estimation of fissile content in irradiated material

AU - Rossa, Riccardo

AU - Boogers, Eric

AU - Borella, Alessandro

AU - Boden, Sven

AU - Broeckx, Wouter

AU - Noynaert, Luc

AU - van der Meer, Klaas

N1 - Score=3

PY - 2018/5/16

Y1 - 2018/5/16

N2 - Neutron coincidence counters based on 3He proportional counters have been widely used for the detection of fissile material in applications such as nuclear safeguards, security, and decommissioning. Recently, SCK•CEN purchased two used Canberra WM3400 neutron coincidence counters in the frame of the initial characterization process for the decommissioning of historical sodium loops. Several so-called In-Pile Sections (IPS) were irradiated in the BR2 reactor at SCK•CEN during 1970-1980’s to study the rupture of fast reactor fuel in accidental conditions. The section of the IPS containing the original fuel pins was already removed from the SCK•CEN site for further R&D activities, but the residual fissile material in the remaining part, containing the loop components, needs to be quantified in order to determine the strategy for segmentation, conditioning and transportation. This contribution focuses on the initial testing of the detectors to verify their correct operation. A Monte Carlo model of the detector was developed with the MCNPX-PoliMi code, and a comparison between experiments and simulation results have been conducted. Measurements with a 252Cf source were carried out and the point model equations were applied to calculate the detector efficiency and die-away time. The initial testing confirmed the operating conditions recommended by the manufacturer, although the Totals and Reals rates estimated with Monte Carlo simulations were approximately 6% and 18% larger than the measured values. In addition, a strong sensitivity to gamma-rays was observed in a series of experiments.

AB - Neutron coincidence counters based on 3He proportional counters have been widely used for the detection of fissile material in applications such as nuclear safeguards, security, and decommissioning. Recently, SCK•CEN purchased two used Canberra WM3400 neutron coincidence counters in the frame of the initial characterization process for the decommissioning of historical sodium loops. Several so-called In-Pile Sections (IPS) were irradiated in the BR2 reactor at SCK•CEN during 1970-1980’s to study the rupture of fast reactor fuel in accidental conditions. The section of the IPS containing the original fuel pins was already removed from the SCK•CEN site for further R&D activities, but the residual fissile material in the remaining part, containing the loop components, needs to be quantified in order to determine the strategy for segmentation, conditioning and transportation. This contribution focuses on the initial testing of the detectors to verify their correct operation. A Monte Carlo model of the detector was developed with the MCNPX-PoliMi code, and a comparison between experiments and simulation results have been conducted. Measurements with a 252Cf source were carried out and the point model equations were applied to calculate the detector efficiency and die-away time. The initial testing confirmed the operating conditions recommended by the manufacturer, although the Totals and Reals rates estimated with Monte Carlo simulations were approximately 6% and 18% larger than the measured values. In addition, a strong sensitivity to gamma-rays was observed in a series of experiments.

KW - neutron coincidence counting

KW - Monte Carlo

KW - safeguards

KW - decommissioning

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/33428801

M3 - In-proceedings paper

BT - International Workshop on Numerical Modelling of NDA Instrumentation and Methods for Nuclear Safeguards

PB - European Safeguard Research and Development Association

ER -

ID: 5004661