Impact of the ENDF/B-VIII.0 library on modeling nuclear tools for oil exploration

Mauborgne, Marie-Laure; Radtke, R. J.; Stoller, Ch.; Haranger, F.

doi:10.1051/epjconf/202023920007

Cited by 15 publications

(3 citation statements)

References 7 publications

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“…d) Additional work is needed on the evaluated resonance integrals of 50,53 Cr isotopes. e) Capture gamma spectra of thermal neutrons in iron and chromium need to be reevaluated to address issues recently raised by Mauborgne et al [213].…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Newly Evaluated Neutron Reaction Data on Chromium Isotopes

Nobre,

Pigni,

Brown

et al. 2021

Preprint

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Neutron reaction data for the set of major chromium isotopes were reevaluated from the thermal energy range up to 20 MeV. In the low energy region, updates to the thermal values together with an improved R-matrix analysis of the resonance parameters characterizing the cluster of large s-wave resonances for 50,53 Cr isotopes were performed. In the intermediate and high energy range up to 20 MeV, the evaluation methodology used statistical nuclear reaction models implemented in the EMPIRE code within the Hauser-Feshbach framework to evaluate the reaction cross sections and angular distributions. Exceptionally, experimental data were used to evaluate relevant cross sections above the resonance region up to 5 MeV in the major 52 Cr isotope. Evaluations were benchmarked with Monte Carlo simulations of a small suite of critical assemblies highly sensitive to Chromium data, and with the Oktavian shielding benchmark to judge deep penetration performance with a 14-MeV D-T neutron source. A significant improvement in performance is demonstrated compared to existing evaluations.

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Section: Conclusion and Recommendationsmentioning

confidence: 99%

Newly Evaluated Neutron Reaction Data on Chromium Isotopes

Nobre,

Pigni,

Brown

et al. 2021

Preprint

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“…These gammas are essential for safety during reactor operations (worker's protection or radiation damage [1]) or have applications in many areas like element identification in soil [2] and space [3]. Despite its importance, the prompt gamma production in present nuclear data libraries is generally discrepant [4]. Fortunately, many experimenters have recently focused on this area, with [5][6][7] being among the most important recent publications on the subject.…”

Section: Introductionmentioning

confidence: 99%

New setup for measurement of prompt gammas from neutron interactions

et al. 2023

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Prompt gamma radiation from neutron interactions is an important issue as it affects the operation of nuclear facilities (radiation protection or gamma heating issues) or has various uses (non-destructive identification of elements). Despite of importance, its production is inaccurately described in present nuclear data libraries. Therefore, a set of experiments have been carried out focusing on this radiation - prompt gamma from neutron inelastic scattering on oxygen and prompt gamma from radiative capture on manganese, both present the form of an aqueous solution. The gammas were induced by the Am-Be neutron source (for oxygen) and 252Cf spontaneous fission neutron source (for manganese). In the case of oxygen, the present libraries can be used, but all the libraries tested overestimated the experiment by 20–30%, considering the experimental uncertainty of 6-9%. INDEN-4.0 library is giving the best results. In the case of manganese, none of the libraries tested give acceptable results. The INDEN updated data for gamma production on manganese give usable results, but there is still a discrepancy from -36% to 55% with uncertainties from 6-15%.

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“…On the other hand, prompt gamma radiation has several benefits -a well-described gamma field can be used for testing of radiation measuring devices, it can be used for the measurement of the reactor power [2]. Another application is the Earth crust exploration since the capture gammas are an important signature of the presence of materials present in Earth crust [3].…”

Section: Introductionmentioning

confidence: 99%

Measurement of prompt gamma field above the VR-1 water level

et al. 2021

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Pool-type reactors are an excellent source of high energy photons without neutrons because the water above fuel acts as an outstanding neutron shielding, whereas for high energy photons, it is nearly transparent. The absence of neutrons is a valuable property essential for testing semiconductor detectors because they are sensitive to neutrons, which might cause their damage. The high energy gammas are worth studying because they are responsible for radiation induced heating of reactor internal components in energy producing reactors, which might lead to their radiation induced damage by void swelling. At this effect, the helium produced in (n,α) reactions influenced by locally increased temperature clusters into bigger bubbles, which are increasing material volume, and therefore changing the geometry of internals. The referred method could be utilized e.g. for resource exploration by detecting prompt capture gammas. The prompt gamma field was measured at the VR-1 reactor with two different cores and water levels. The stilbene measurements showed relatively good agreement with the spectrum shape computed by MCNP6.2. An important result is a confirmation that the stilbene deconvolution matrix can be used with a rotated crystal. The testing measurement with HPGe detectors showed a possibility for measurement in such type of geometry.

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Impact of the ENDF/B-VIII.0 library on modeling nuclear tools for oil exploration

Cited by 15 publications

References 7 publications

Newly Evaluated Neutron Reaction Data on Chromium Isotopes

Newly Evaluated Neutron Reaction Data on Chromium Isotopes

New setup for measurement of prompt gammas from neutron interactions

Measurement of prompt gamma field above the VR-1 water level

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