Induced radioactivity of materials by stray radiation fields at an electron accelerator

Rokni, S.H.; Fassó, A.; Gwise, T.; Liu, J.C.; Roesler, S.

doi:10.1016/s0168-9002(01)02064-2

“…An excellent overview of methods used to predict induced activity specifically at high-energy electron machines, including new advances in application of Monte Carlo simulations in this area, can be found in a recent work by Fassò et al (21) . Rokni at al (22) recently irradiated a number of materials in stray fields from a 28.5 GeV electron beam and compared their experimental results with calculations using the FLUKA (23) MonteCarlo code.…”

Section: Induced Activitymentioning

confidence: 99%

Radiation Protection at High Energy Electron Accelerators

Vylet¹,

Liu²

2001

Radiation Protection Dosimetry

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This work presents an overview of radiation protection at high-energy electron accelerator facilities. By "high-energy" we mean the energy domain beyond few tens of MeV, where electromagnetic showers are the determining and dominant factor in beam interactions with matter. We describe basic components of electron accelerators and their potential impact on radiation safety. We then concentrate mainly on sources of prompt radiation which distinguish these machines from other accelerator facilities. In other areas we only mention details relevant to electron machines. More comprehensive description of these aspects, such as shielding or safety systems, can be found elsewhere in this issue. General concepts presented in this review are complemented and illustrated by more specific examples in our follow-up work in this issue (1) .

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“…The accurate prediction of induced radioactivity using FLUKA or another Monte Carlo codes is not at a perfect stage yet and a factor of 2-3 agreement is common for most radionuclides [6,7]. Thus, the absolute radionuclide yields in this study should not be paid special emphasis.…”

Section: Discussionmentioning

confidence: 97%

“…The radionuclide of 3 H, 7 Be, 22 Na, 24 Na, 45 Ca, 54 Mn, and 55 Fe were scored directly in soil regions 7-12 using the RESNUCLE card and the results were post-processed using the program rusrsuw. The star densities produced by neutrons and by all particles (hereafter called neutron star and all star, respectively) in the soil regions were scored using SCORE.…”

Section: Fluka Calculationsmentioning

confidence: 99%

“…To evaluate the environmental impact, the information of radionuclide yields and the attenuation of radiation (mainly the high-energy neutrons, which propagate the cascade) in the soil shielding around a high-energy accelerator is important. In this study, the atomic concentration of some important radionuclides ( 3 H, 7 Be, 22 Na, 24 Na, 45 Ca, 54 Mn, and 55 Fe) in the soil surrounding the cylindrical Linac tunnel was calculated using FLUKA [1,2] for the case of a uniform beam loss. The attenuation length of star density in soil and the neutron fluence spectra in soil were also calculated.…”

Section: Introductionmentioning

confidence: 99%

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Fluka Calculations of Radionuclides, Star, and Neutron Fluence in Soil Around High-Energy Electron and Proton Linear Accelerators

Puryear¹,

Texas²,

Liu³

et al. 2002

0

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Information of radionuclide production and the attenuation of high-energy neutrons in the soil shielding around accelerators is important for environmental impact assessment. The radionuclide concentration of 3 H, 7 Be, 22 Na, 24 Na, 45 Ca, 54 Mn, and 55 Fe in the soil outside the cylindrical concrete tunnel from a uniform beam loss along a copper Linac was calculated using FLUKA. The atom concentration and the number of atom per star for radionuclides were given as a function of soil depth. Attenuation length of star density, as well as the neutron fluence spectra, was calculated. Studies for electron and proton beams at 500 GeV were made and their results were compared to examine the common understanding that the radiation and radioactivity patterns outside a certain thickness of shielding are the same between high-energy electron and proton beams. The effects of star-scoring threshold (20 or 50 MeV) by neutrons or by all particles on the results were also investigated.

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“…An excellent overview of methods used to predict induced activity specifically at high-energy electron machines, including new advances in application of Monte Carlo simulations in this area, can be found in a recent work by Fassò et al (21) . Rokni at al (22) recently irradiated a number of materials in stray fields from a 28.5 GeV electron beam and compared their experimental results with calculations using the FLUKA (23) Monte-Carlo code.…”

Section: Induced Activitymentioning

confidence: 99%

Radiation Protection at High-Energy Electron Accelerators

Liu¹

2002

0

View full text Add to dashboard Cite

This work presents an overview of radiation protection at high-energy electron accelerator facilities. By "high-energy" we mean the energy domain beyond few tens of MeV, where electromagnetic showers are the determining and dominant factor in beam interactions with matter. We describe basic components of electron accelerators and their potential impact on radiation safety. We then concentrate mainly on sources of prompt radiation which distinguish these machines from other accelerator facilities. In other areas we only mention details relevant to electron machines. More comprehensive description of these aspects, such as shielding or safety systems, can be found elsewhere in this issue. General concepts presented in this review are complemented and illustrated by more specific examples in our follow-up work in this issue (1) .

show abstract

Induced radioactivity of materials by stray radiation fields at an electron accelerator

Cited by 11 publications

References 5 publications

Radiation Protection at High Energy Electron Accelerators

Radiation Protection at High Energy Electron Accelerators

Fluka Calculations of Radionuclides, Star, and Neutron Fluence in Soil Around High-Energy Electron and Proton Linear Accelerators

Radiation Protection at High-Energy Electron Accelerators

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