Nuclear data production, calculation and measurement: a global overview of the gamma heating issue

Colombier, A. C.; Amharrak, H.; Fourmentel, D.; Ravaux, S.; Regnier, David; Gueton, O.; Hudelot, Jean-Pascal; Lemaire, Matthieu

doi:10.1051/epjconf/20134204001

Cited by 7 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results suggest that the increasing N incorporation mainly resulted from gamma-ray heating. As the gamma ray released its energy in its absorption location, it led to a transfer of energy to electrons, which then imparted this energy to the film by displacement and ionization and contributed to heating (thermal energy) [27]. Again, as shown in Fig.…”

Section: Resultsmentioning

confidence: 97%

Effect of gamma-ray irradiation on structural properties of GaAsN films grown by metal organic vapor phase epitaxy

Klangtakai

Sanorpim

Wattanawareekul

et al. 2015

Journal of Crystal Growth

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 97%

Effect of gamma-ray irradiation on structural properties of GaAsN films grown by metal organic vapor phase epitaxy

Klangtakai

Sanorpim

Wattanawareekul

et al. 2015

Journal of Crystal Growth

View full text Add to dashboard Cite

“…It is also of importance for nuclear applications, since γ -ray heating accounts for a major source of energy deposition in certain reactor components, e.g., instrumentations and structural materials. In particular, the heating from γ rays is two orders of magnitude higher than neutron heating [45] in reactor reflectors and shielding, and needs to be estimated to a reasonable accuracy to avoid possible fracture and failure. The observed results facilitate the design for the fast reactors in Generation IV, which may not require significant changes in the modeling of γ heating transportation.…”

Section: Discussionmentioning

confidence: 99%

Statistical study of the prompt-fission γ -ray spectrum for U238(n, f ) in the fast-neutron region

Lebois

Wilson

et al. 2018

Phys. Rev. C

View full text Add to dashboard Cite

Prompt-fission γ -ray spectra (PFGS) have been measured for the 238 U(n, f ) reaction using fast neutrons produced by the LICORNE directional neutron source. Fission events were detected with an ionization chamber containing actinide samples placed in the neutron beam, and the coincident prompt-fission γ rays were measured using a number of LaBr 3 scintillation detectors and a cluster of nine phoswich detectors from the PARIS array. Prompt-fission γ rays (PFGs) were discriminated from prompt-fission neutrons using the time-of-flight technique over distances of around 35 cm. PFG emission spectra were measured at two incident neutron energies of 1.9 and 4.8 MeV for 238 U(n, f )andalsofor 252 Cf (sf ) as a reference. Spectral characteristics of PFG emission, such as mean γ multiplicity and average total γ -ray energy per fission, as well as the average γ -ray energy, were extracted. The sensitivity of these results to the width of the time window and the type of spectral unfolding procedure used to correct for the detector responses was studied. Iteration methods were found to be more stable in low-statistics data sets. The measured values at E n = 1.9 MeV were found to be the mean γ multiplicity M γ = 6.54 ± 0.19, total released energy per fission E γ,tot = 5.25 ± 0.20 MeV, and the average γ -ray energy ǫ γ = 0.80 ± 0.04 MeV. Under similar conditions, the values at E n = 4.8 MeV were measured to be M γ = 7.31 ± 0.46, E γ,tot = 6.18 ± 0.65 MeV, and ǫ γ = 0.84 ± 0.11 MeV.

show abstract

“…Gamma rays arising from either nuclear reactions or decay processes can significantly influence the heating [1], dose rates [2,3], and radiation-induced aging of reactor components [4]. Understanding gamma-ray characteristics in and around nuclear reactors is therefore essential to their design and operation.…”

Section: Introductionmentioning

confidence: 99%

Gamma-ray Spectroscopy in Low-Power Nuclear Research Reactors

Pakari,

Lucas,

Darby

et al. 2024

JNE

View full text Add to dashboard Cite

Gamma-ray spectroscopy is an effective technique for radioactive material characterization, routine inventory verification, nuclear safeguards, health physics, and source search scenarios. Gamma-ray spectrometers typically cannot be operated in the immediate vicinity of nuclear reactors due to their high flux fields and their resulting inability to resolve individual pulses. Low-power reactor facilities offer the possibility to study reactor gamma-ray fields, a domain of experiments hitherto poorly explored. In this work, we present gamma-ray spectroscopy experiments performed with various detectors in two reactors: The EPFL zero-power research reactor CROCUS, and the neutron beam facility at the Ohio State University Research Reactor (OSURR). We employed inorganic scintillators (CeBr3), organic scintillators (trans-stilbene and organic glass), and high-purity germanium semiconductors (HPGe) to cover a range of typical—and new—instruments used in gamma-ray spectroscopy. The aim of this study is to provide a guideline for reactor users regarding detector performance, observed responses, and therefore available information in the reactor photon fields up to 2 MeV. The results indicate several future prospects, such as the online (at criticality) monitoring of fission products (like Xe, I, and La), dual-particle sensitive experiments, and code validation opportunities.

show abstract

Nuclear data production, calculation and measurement: a global overview of the gamma heating issue

Abstract: Abstract. The gamma heating evaluation in different materials found in current and future generations of nuclear reactor (EPR TM

Cited by 7 publications

References 8 publications

Effect of gamma-ray irradiation on structural properties of GaAsN films grown by metal organic vapor phase epitaxy

Effect of gamma-ray irradiation on structural properties of GaAsN films grown by metal organic vapor phase epitaxy

Statistical study of the prompt-fission γ -ray spectrum for U238(n, f ) in the fast-neutron region

Gamma-ray Spectroscopy in Low-Power Nuclear Research Reactors

Contact Info

Product

Resources

About