Irradiation tests of prototype self-powered gamma and neutron detectors

Ludo Vermeeren, Hubert Carcreff, Loic Barbot, Véronique Clouté-Cazalaa, Stéphane Fourrez, Laurent Pichon, Marc Schyns

    Research outputpeer-review

    Abstract

    In the framework of the SCK•CEN-CEA Joint Instrumentation Laboratory, we are developing and optimizing a self-powered detector for selective in-core monitoring of the gamma field. Several prototypes with bismuth emitters were developed and tested in a pure gamma field (PAGURE at CEA) and in mixed neutron and gamma fields (OSIRIS at CEA and BR2 at SCK•CEN). MCNP modelling was performed to calculate the gamma and neutron sensitivities. Apart from a few failing prototypes, all detectors showed equilibrium signals proportional to the gamma field with a good long-term stability. A tubular geometry design was finally selected as the most appropriate, coupling a larger sensitivity with better response characteristics. In the same experiment six prototype SPNDs with continuous sheaths were extensively tested: with Co, V and Rh emitters, and with varying geometries. The prompt and delayed response contributions and the signal contributions due to the impact of gamma rays were experimentally determined. The evolution of the signals was continuously followed during the full irradiation period. The signal-to-noise level was observed to be well below 1%. The absolute neutron and gamma responses for all SPNDs are consistent.
    Original languageEnglish
    Title of host publication2nd International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2011
    Place of PublicationUnited States
    StatePublished - 3 Apr 2012
    Event2011 - ANIMMA - Advancements in Nuclear Instrumentation Measurement Methods and their Applications: International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications - Ghent
    Duration: 6 Jun 20119 Jun 2011

    Conference

    Conference2011 - ANIMMA - Advancements in Nuclear Instrumentation Measurement Methods and their Applications
    Country/TerritoryBelgium
    CityGhent
    Period2011-06-062011-06-09

    Cite this