Experimental Evaluation of Minima in the Total Neutron Cross Sections of Several Shielding Materials

Straker, E.A.

doi:10.13182/nse68-a19537

Cited by 8 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However the use of MCNP makes it easier to imply the detector resolution, to calculate the contribution of collided neutrons, sensitivity etc. Propagation of the C/E underestimation observed for the 60" O-broomstick neutron transmission with ENDF/B-VIII.0 data to the 16 O(n,↵) cross section suggests to decrease these data by 10 -15% between 5.5 and 8.0 MeV. This is confirmed by the thick target neutron yield induced by ↵-particles with energies up to 5 -6 MeV in carbon.…”

Section: Ornl Oxygen Broomstickmentioning

confidence: 71%

“…A rare example of a pure oxygen benchmark is the existing entry NEA-1517/59 (SDT2) of the SINBAD database [3]. This comprises the results of measurement of the neutron transmission spectra through the liquid oxygen broomstick of the large length 60" (152.4 cm) [16]. The experiment was performed in 1965 at the Tower Shielding Facility located in ORNL and was designed to measure the neutron total cross sections in the range of 1.9-8.6 MeV, Fig.…”

Section: Ornl Oxygen Broomstickmentioning

confidence: 99%

“…The neutron-leakage spectra of 75 pulsed spheres made of 20 distinct materials were simulated using ENDF/B-VII.1 and ENDF/B-VIII.0 [27]. They highlight issues in 6 Li, 12 C, 16 O, Mg, 27 Al, Ti, and Pb nuclear data. Sensitivities for some of those simulated neutronleakage spectra were calculated in [28] to better understand which nuclear data observables could potentially lead to biases in simulating these experiments.…”

Section: Llnl Pulsed-sphere Neutron Leakage Spectra (75 Spheres Of 20...mentioning

confidence: 99%

See 2 more Smart Citations

Outcomes of WPEC SG47 on "Use of Shielding Integral Benchmark Archive and Database for Nuclear Data Validation"

et al. 2023

View full text Add to dashboard Cite

The Working Party on International Nuclear Data Evaluation Co-operation Subgroup 47 (WPECSG47) entitled "Use of Shielding Integral Benchmark Archive and Database for Nuclear Data Validation" was organised from 2019 and 2022 with the objectives to promote more systematic and wider use of shielding benchmark experiments in nuclear data (ND) and transport code validation and development, to provide feedback on the Shielding Integral Benchmark Archive and Database (SINBAD), and to promote its further development in coordination with the Expert Group on Physics of Reactor Systems (EGPRS). Altogether 9 meetings, the large majority (8) held remotely, were organised during the past 3 years to discuss the experience on the use of SINBAD, evaluation of new benchmarks and improvements to be contributed to the database which was severely neglected and lacking maintenance over the past ⇠ 10+ years. Several proposals for new or updated benchmark evaluation were presented and discussed, such as FNG copper, LLNL pulsed spheres, CIAE iron sphere, KFK 1977 gamma measurements, Rez Fe sphere, ASPIS, ORNL Oxygen broomstick, TIARA and others. Complementing the database with new features was also discussed, for example providing the nuclear data sensitivity profiles more systematically would facilitate and better guide the use of data. Information on the geometry, (radiation source) and materials available in CAD format is expected to allow an easier and less error prone reference for computational model preparation and a potential input to CAD based workflows. Inputs for various transport codes and other benchmark data from participants have been shared via the NEA GitLab which could hopefully in the future evolve and form a bases for critically checked and validated benchmark data. Future development of SINBAD will be monitored by EGPRS and the newly created SINBAD Task Force.

show abstract

Section: Ornl Oxygen Broomstickmentioning

confidence: 71%

Section: Ornl Oxygen Broomstickmentioning

confidence: 99%

Section: Llnl Pulsed-sphere Neutron Leakage Spectra (75 Spheres Of 20...mentioning

confidence: 99%

See 1 more Smart Citation

Outcomes of WPEC SG47 on "Use of Shielding Integral Benchmark Archive and Database for Nuclear Data Validation"

et al. 2023

View full text Add to dashboard Cite

show abstract

“…As an example of this process, within the last year analysis of an iron benchmark experiment [6] led to the remeasurements of the iron total cross section between 20 and 300 keV revealing factors of 2 errors in the interference minima [4] and within the last few months reanalysis of the iron broomstick experiment [7,8] [7] and sodium [18] are being fully documented. In all cases there is a clear need for sensitivity analyses when these experiments are used to evaluate uncertainties in a given design problem.…”

Section: Elements Of a Shielding Methodsmentioning

confidence: 99%

LMFBR Radiation Transport Methods Development.

Mynatt¹,

Gritzner²,

Williams³

et al. 1972

View full text Add to dashboard Cite

The elements of a shielding program based on a fundamental approach are discussed with a brief evaluation of the present status of the technology. A procedure is presented for utilizing the best features of Monte Carlo, discrete ordinates, and diffusion theory in coupled calculations providing good accuracy at minimum expense. As an example, results are presented from a four-step coupled two-dimensional discrete ordinates calculation for determination of the neutron and secondary gamma-ray dose rates in the FTR head compartment. An assessment of computational methods development plans is presented.

show abstract

“…All of the calculations of the NE-213 spectra were smoothed with the resolution funct.ion of the spectrometer. 14 In general, undulations in the smoothed spect~a above 3 MeV are due to the coarse. group structure used in the calculations, i .…”

Section: Description Of the Experimentsmentioning

confidence: 99%

ORNL benchmark experiment for neutron transport in iron and stainless steel

E.¹,

Muckenthaler²

1973

View full text Add to dashboard Cite

Experimental Evaluation of Minima in the Total Neutron Cross Sections of Several Shielding Materials

Cited by 8 publications

References 0 publications

Outcomes of WPEC SG47 on "Use of Shielding Integral Benchmark Archive and Database for Nuclear Data Validation"

Outcomes of WPEC SG47 on "Use of Shielding Integral Benchmark Archive and Database for Nuclear Data Validation"

LMFBR Radiation Transport Methods Development.

ORNL benchmark experiment for neutron transport in iron and stainless steel

Contact Info

Product

Resources

About