Neutron spectrometry with spherical hydrogen proportional detectors

Jánský, Bohumil; Novák, Evžen

doi:10.1016/j.nima.2013.08.034

Cited by 17 publications

(7 citation statements)

References 3 publications

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“…The reason is attributed mainly to variations in 19 F evaluations, namely in the inelastic to elastic scatter ratio. The observed trend is comparable to those presented by Kato et al 2014. …”

Section: : Measured Neutron Spectra In Various Insertionssupporting

confidence: 90%

“…In this paper, FLINA salt with natural Li enrichment was used due to limited availability of high enriched Li-7 salt. The fluorine content in FLINA is comparable to that of FLIBE, the primary candidate for FHR systems, thus any discrepancies in 19 F, as observed by Kato et al 2014, should be observed in either salt. The experiments were performed in the LR-0 reactor which is a light water reactor that achieves criticality by increasing moderator level.…”

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confidence: 90%

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Comparison of fast neutron spectra in graphite and FLINA salt inserted in well-defined core assembled in LR-0 reactor

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Cvachovec

et al. 2015

Annals of Nuclear Energy

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The present paper aims to compare the calculated and measured spectra after insertion of candidate materials for the MSR/FHR reactor system concept into the LR-0 reactor. The calculation is realized with MCNP6 code using ENDF/B VII.0, JEFF 3.1, JENDL 3.3, JENDL 4, ROSFOND and CENDL 3.1 nuclear data libraries. Additionally, comparisons between the slowing down power of each media were performed. The slowing down properties are important parameters affecting the thickness of moderator media in a reactor.

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Section: : Measured Neutron Spectra In Various Insertionssupporting

confidence: 90%

mentioning

confidence: 90%

Comparison of fast neutron spectra in graphite and FLINA salt inserted in well-defined core assembled in LR-0 reactor

Košťál

Veškrna

Cvachovec

et al. 2015

Annals of Nuclear Energy

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“…Two hydrogen proportional spherical detectors (HPD) K4 and K8 with diameter of 40 mm were used in neutron spectrometer [3]. The detector K4 with pressure 400 kPa was used for measurement in the energy range En = 0.1-0.4 MeV, the detector K8 with pressure 1000 kPa was used for measurement in the energy range En = 0.4-1.3 MeV [3].…”

Section: Experimental Assembliesmentioning

confidence: 99%

“…The detector K4 with pressure 400 kPa was used for measurement in the energy range En = 0.1-0.4 MeV, the detector K8 with pressure 1000 kPa was used for measurement in the energy range En = 0.4-1.3 MeV [3].…”

Section: Experimental Assembliesmentioning

confidence: 99%

Neutron spectra measurement and calculations using data libraries CIELO, JEFF-3.2 and ENDF/B-VII.1 in iron benchmark assemblies

et al. 2017

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Abstract. The leakage neutron spectra measurements have been done on benchmark spherical assembliesiron spheres with diameter of 20, 30, 50 and 100 cm. The Cf-252 neutron source was placed into the centre of iron sphere. The proton recoil method was used for neutron spectra measurement using spherical hydrogen proportional counters with diameter of 4 cm and with pressure of 400 and 1000 kPa. The neutron energy range of spectrometer is from 0.1 to 1.3 MeV. This energy interval represents about 85 % of all leakage neutrons from Fe sphere of diameter 50 cm and about of 74% for Fe sphere of diameter 100 cm. The adequate MCNP neutron spectra calculations based on data libraries CIELO, JEFF-3.2 and ENDF/B-VII.1 were done. Two calculations were done with CIELO library. The first one used data for all Fe-isotopes from CIELO and the second one (CIELO-56) used only Fe-56 data from CIELO and data for other Fe isotopes were from ENDF/B-VII.1. The energy structure used for calculations and measurements was 40 gpd (groups per decade) and 200 gpd. Structure 200 gpd represents lethargy step about of 1%. This relatively fine energy structure enables to analyze the Fe resonance neutron energy structure. The evaluated cross section data of Fe were validated on comparisons between the calculated and experimental spectra.

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“…A set of proportional counters is typically used for covering a wide energy domain, like in [12], where 40 mm spherical hydrogen detectors with pressure of 100, 400 and 1000 kPa have been used for the measurement of an extracted neutron beam in the energy range 20-1200 keV.…”

Section: Neutron Beam Characterizationmentioning

confidence: 99%

On the possible use of the MASURCA reactor as a flexible, high-intensity, fast neutron beam facility

et al. 2017

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Abstract. In recent work [1,2], we have shown that the MASURCA research reactor could be used to deliver a fairly-intense continuous fast neutron beam to an experimental room located next to the reactor core. As a consequence of the MASURCA favorable characteristics and diverse material inventories, the neutron beam intensity and spectrum can be further tailored to meet the users' needs, which could be of interest for several applications. Monte Carlo simulations have been performed to characterize in detail the extracted neutron (and photon) beam entering the experimental room. These numerical simulations were done for two different bare cores: A uranium metallic core (∼30% 235 U enriched) and a plutonium oxide core (∼25% Pu fraction, ∼78% 239 Pu). The results show that the distinctive resonance energy structures of the two core leakage spectra are preserved at the channel exit. As the experimental room is large enough to house a dedicated set of neutron spectrometry instruments, we have investigated several candidate neutron spectrum measurement techniques, which could be implemented to guarantee well-defined, repeatable beam conditions to users. Our investigation also includes considerations regarding the gamma rays in the beams.

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Neutron spectrometry with spherical hydrogen proportional detectors

Cited by 17 publications

References 3 publications

Comparison of fast neutron spectra in graphite and FLINA salt inserted in well-defined core assembled in LR-0 reactor

Comparison of fast neutron spectra in graphite and FLINA salt inserted in well-defined core assembled in LR-0 reactor

Neutron spectra measurement and calculations using data libraries CIELO, JEFF-3.2 and ENDF/B-VII.1 in iron benchmark assemblies

On the possible use of the MASURCA reactor as a flexible, high-intensity, fast neutron beam facility

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