[New Benchmark] - ISIS Deep-Penetration of Neutrons through Concrete and Iron Shields

[Radiation-Transport]

Is the new benchmark computational or experimental?

• [] Computational
• Experimental

Is this a MultiTest or a normal Test?

MultiTest

Give a concise description of the benchmark

The purpose of this experiment was to measure the deep-penetration neutrons through a thick bulk shield at an intense spallation neutron source facility, ISIS, of the Rutherford Appleton Laboratory (RAL), United Kingdom [1], [2].

The source is a thick tantalum target (total length of 296.5 mm) impinged by 800 MeV - 200 �A protons, producing neutrons. This target, placed at the center of the target station, is shielded with approximately 3-m-thick steel and 1-m-thick ordinary concrete in the upward direction, through which the neutrons are transmitted (Fig.1 and Fig.2). On top of the shield of the target station (Fig.3), the neutron flux attenuations through concrete and iron shields, which were additionally placed up to 1.2-m and 0.6-m thicknesses respectively (Fig.4), were measured using activation detectors of graphite, bismuth, aluminum and a multi-moderator spectrometer using indium-oxide activation detector. The attenuation lengths for concrete and iron of high-energy neutrons above 20 MeV at 90 degrees to the proton beam axis were obtained from the 12C(n, 2n)11C reaction rates. The neutron energy spectra in the energy range from thermal to 400 MeV behind concrete and iron were also obtained by an unfolding analysis using the reaction rates of 12C(n, 2n)11C, 27Al(n, a)24Na, 209Bi(n, xn)210-xBi (x=4~10), and 115In(n, g)116mIn.

Ref: https://www.oecd-nea.org/science/wprs/shielding/sinbad/isis800/isis-abs.htm

Does the benchmark needs new types of plots?

You can check the available plot types already implemented in JADE here. If you think that no plot can be adapted to the needs of this benchmark please provide a description (better a screenshot) of the new type of plots
to be implemented.

Can the benchmark be used for all codes implemented in JADE or for a specific subset?

Not to be shared in JADE as proprietary benchmark of SINBAD.

Input for MCNP only.

Can inputs of this benchmark be freely re-distributed?

• [] yes
• no

If no, please specific who will be able to access the inputs.
Only Sinbad licensee.

Additional information/context

Add here any additional information or context that you want to provide.

To be completed only for experimental benchmarks

Please erase this entire block if the benchmark to be added is a computational one.

Is any of the existing general classes suitable for this benchmark?

To be checked.

Can experimental data of this benchmark be freely re-distributed?

• [] yes
• no

If no, please specific who will be able to access the experimental data.
Only Sinbad licensee.