Preliminary engineering assessment of the HCLL and HCPB Neutron Activation System

Pattrick Calderoni, Maurizio Angelone, Axel Klix, Dieter Leichtle

Research output: Contribution to conferencePaper

Abstract

The Neutron Activation System (NAS) is one of the four types of neutronics sensors considered for the testing of the HCLL and HCPB Test Blanket Module (TBM) in ITER. It measures the absolute neutron flux intensity with information on the neutron spectrum in selected positions of the TBM. The working principle of the NAS is as follows: the system moves small activation probes (capsules) into selected positions in the TBM (irradiation ends) by means of pneumatic transport with pressurized helium gas; the capsules are irradiated for a selected period, depending on their materials composition (several tens of seconds up to the full plasma pulse length); immediately after the irradiation they are extracted and transported to a gamma spectrometer by means of the same pneumatic transport system; the gamma spectrometer determines the induced gamma activity; the neutron flux and neutron fluence is calculated from the measured gamma activity and the known activation cross section of the materials in the activation probe; after the measurement the capsule is sent either to a disposal or storage (for later measurement). This paper summarizes the results of the feasibility assessment of the TBM NAS in the conceptual design phase, including design justification, identification of requirements based on the expected operating conditions in ITER and preliminary engineering assessment of the activation materials, irradiation ends integration in the modules design and the counting station.
Original languageEnglish
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications, ANIMMA 2015 - Lisbon, Portugal
Duration: 1 Jan 2015 → …

Conference

Conference4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications, ANIMMA 2015
CountryPortugal
CityLisbon
Period1/1/15 → …

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All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Radiation
  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Calderoni, P., Angelone, M., Klix, A., & Leichtle, D. (2015). Preliminary engineering assessment of the HCLL and HCPB Neutron Activation System. Paper presented at 4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications, ANIMMA 2015, Lisbon, Portugal. https://doi.org/10.1109/ANIMMA.2015.7465530