Miniature Fission Chambers Calibration in Pulse Mode: Interlaboratory Comparison at the SCK∙CEN BR1 and CEA CALIBAN Reactors

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

Authors

Institutes & Expert groups

  • CEA Saclay - Commissariat à l'énergie atomique
  • OTND Groupe
  • EPFL - École polytechnique fédérale de Lausanne
  • CEA Cadarache - Commissariat à l'Énergie Atomique

Documents & links

Abstract

Miniature fission chambers are suited tools for instrumenting experimental reactors, allowing online and in-core neutron measurements of quantities such as fission rates or reactor power. A new set of such detectors was produced by CEA to be used during the next experimental program at the EOLE facility starting in 2013. Some of these detectors will be employed in pulse mode for absolute measurements, thus requiring calibration. The calibration factor is expressed in mass units and thus called “effective mass”. A calibration campaign was conducted in December 2012 at the SCK·CEN BR1 facility within the framework of the scientific cooperation VEP (VENUS-EOLE-PROTEUS) between SCK·CEN, CEA and PSI. Two actions were conducted in order to improve the calibration method. First a new characterisation of the thermal flux cavity and the MARK3 neutron flux conversion device performed by SCK·CEN allowed using calculated effective cross sections for determining detectors effective masses. Dosimetry irradiations were performed in situ in order to determine the neutron flux level and provide link to the metrological standard. Secondly two fission chambers were also calibrated at the CEA CALIBAN reactor (fast neutron spectrum), using the same method so that the results can be compared with the results obtained at the SCK·CEN. In this paper the calibration method and recent improvements on uncertainty reduction are presented. The results and uncertainties obtained in the two reactors CALIBAN and BR1 are compared and discussed.

Details

Original languageEnglish
Title of host publication 2013 3rd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications (ANIMMA)
PublisherIEEE - Institute of Electrical and Electronics Engineers
Pages2306-2311
Number of pages6
Edition2013
ISBN (Electronic)978-1-4799-1047-2
DOIs
Publication statusPublished - 1 Aug 2014
Event2013 - ANIMMA - Advancements in Nuclear Instrumentation Measurement Methods and their Applications: International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications - CEA, Aix-Marseille University, SCK•CEN, IEEE, Marseille, France
Duration: 23 Jun 201328 Jun 2013

Conference

Conference2013 - ANIMMA - Advancements in Nuclear Instrumentation Measurement Methods and their Applications
CountryFrance
CityMarseille
Period2013-06-232013-06-28

Keywords

  • Calibration, Uncertainty, Radiation effects, Neutrons, Inductors, Isotopes

ID: 6833924