13 Papers
14 Citations
H. Hamrita is an academic researcher from Commissariat à l'énergie atomique et aux énergies alternatives. The author has contributed to research in topics: Neutron & Fission. The author has an hindex of 5, co-authored 13 publications. Previous affiliations of H. Hamrita include Alternatives.
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Papers
Characterization and Localization of Partial-Discharge-Induced Pulses in Fission Chambers Designed for Sodium-Cooled Fast Reactors
Giacomo Galli,H. Hamrita,C. Jammes,M. J. Kirkpatrick,E. Odic,Ph. Dessante,Ph. Molinie,B. Cantonnet,J-C. Nappe +8 more
TL;DR: In this article, an aberrant electrical signal was detected from the fission chambers used for neutron flux monitoring, which was thought to be due to partial electrical discharge (PD) is similar to the signal resulting from neutron interactions.
Rejection of partial-discharge-induced pulses in fission chambers designed for sodium-cooled fast reactors
TL;DR: In this article, a pulse shape-analysis technique is proposed to discriminate neutron-induced pulses from partial discharges induced ones in fission chambers under given temperature and bias voltage conditions, based on experimental results.
Inverse Problem Approach for the underwater localization of Fukushima Daiichi fuel debris with fission chambers
Jonathan Dumazert,Romain Coulon,Frederick Carrel,Adrien Sari,C. Thiam,M. Trocmé,Q. Lecomte,H. Hamrita,R. Woo,Frederic Laine,Camille Frangville,M. Bakkali,Karim Boudergui,B. Krausz,R. Pissarello,R. Delalez +15 more
TL;DR: In this paper, the authors present an approach in which fuel debris localization is defined as an Inverse Problem, solvable with a Maximum-Likelihood Expectation Maximization (ML-EM) iterative algorithm.
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Patent
System for controlling photomultiplier gain drift and associated method
Stephane Normand,Anne-Marie Frelin,H. Hamrita,Vladimir Kondrasovs +3 more
- 22 Sep 2009
TL;DR: In this paper, a system for controlling photomultiplier gain drift is described, which includes first means for measuring a noise signal of the photomULTiplier, and second means for maintaining the measured noise signal at a constant level, based on the measurement signal.
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A new discriminating high temperature fission chamber filled with xenon designed for sodium-cooled fast reactors
TL;DR: Xenon high temperature fission chamber, designed for sodium-cooled fast reactors, unlike the argon filled fission chambers, can operate at temperatures greater than 500◦C without partial-discharges and discriminate neutrons and partial discharges at temperatures up to 650˚C as discussed by the authors.
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