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Feasibility Study of Self Powered Neutron Detectors in Fast Reactors for Detecting Local Change in Neutron Flux Distribution
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. (Fission Diagnostics and Safeguards)
(CEA, DEN, DER, Instrumentation Sensors and Dosimetry Laboratory, Cadarache)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. (Fission Diagnostics and Safeguards)
(CEA, DEN, DER, Instrumentation Sensors and Dosimetry Laboratory, Cadarache)
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2015 (English)In: Feasibility Study of Self Powered Neutron Detectors in Fast Reactors for Detecting Local Change in Neutron Flux Distribution, 2015Conference paper (Refereed)
Abstract [en]

Neutron flux monitoring systems form an integral part of the design of a Generation IV sodium cooled fast reactor. Diverse possibilities of detector systems have to be investigated with respect to practicality and feasibility according to the detection parameters. In this paper, we demonstrate the feasibility of using self powered neutron detectors as in-core detectors in fast reactors for detecting local changes in the neutron flux distribution. We show that the gamma contribution from fission products decay and activation of structural materials and sodium is very small compared to the fission gammas. Thus, it is possible for the in-core SPND signal to follow changes in local neutron flux as they are proportional to each other. This implies that the signal from an in-core SPND can provide dynamic information on the neutron flux perturbations occuring inside the reactor core.

Place, publisher, year, edition, pages
2015.
Keyword [en]
Sodium-cooled Fast Reactor, Self Powered Neutron Detector, Instrumentation, Core Monitoring
National Category
Subatomic Physics
Research subject
Physics with specialization in Applied Nuclear Physics
Identifiers
URN: urn:nbn:se:uu:diva-297040OAI: oai:DiVA.org:uu-297040DiVA: diva2:940593
Conference
Advancements in Nuclear Instrumentation Measurement Methods and their Applications, ANIMMA 2015
Funder
Swedish Research Council, B0774801
Available from: 2016-06-21 Created: 2016-06-21 Last updated: 2016-06-21

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