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Cable Shielding Studies: Attenuation of Prompt Dose by Poly Materials

This report discusses the findings of cable shielding studies conducted on polyethylene materials for attenuation of prompt dose. It presents attenuation curves for both total dose and dose due to neutrons, photons, electrons, and positrons. Variants of shielding at aisle side and power density and absorbed dose of main and NuMI cables are also presented.

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Cable Shielding Studies: Attenuation of Prompt Dose by Poly Materials

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  1. I. Tropin and N. Mokhov RR Collimation Meeting September 27, 2016 MARS Cable Shielding studies at SCOL613, SCOL616: Prompt dose attenuation by Pure Poly, Borated Poly and Lithiated Poly

  2. MARS toy model • Absorber: semi-infinite layer of poly started from plane • Source of neutrons : – Neutron spectrum at cable shielding, <E>=1.9 eV I. Tropin & N.Mokhov MARS cable shielding studies 09/27/2016 2

  3. Attenuation curves for prompt dose in polyethylene I Total dose Dose due to neutrons I. Tropin & N.Mokhov MARS cable shielding studies 09/27/2016 3

  4. Attenuation curves for prompt dose in polyethylene II Dose due to photons Dose due to electrons and positrons I. Tropin & N.Mokhov MARS cable shielding studies 09/27/2016 4

  5. Variant of shielding at aisle side of scol616 I. Tropin & N.Mokhov MARS cable shielding studies 09/27/2016 5

  6. Main cable: power density Previous variant With insertion I. Tropin & N.Mokhov MARS cable shielding studies 09/27/2016 6

  7. Main cable: absorbed dose (rad/yr) Previous variant With insertion 2.78 Mrad/yr 1.97 Mrad/yr I. Tropin & N.Mokhov MARS cable shielding studies 09/27/2016 7

  8. NuMI cables: absorbed dose (rad/yr) Previous variant With insertion 3.21 Mrad/yr 1.48 Mrad/yr I. Tropin & N.Mokhov MARS cable shielding studies 09/27/2016 8

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