Typical Cross Sections
In the following, some cross sections which are of importance in a nuclear reactor are given. The thermal cross-section is averaged using a Maxwellian spectrum and the fast cross section is averaged using the uranium-235 fission spectrum. The cross sections are taken from the Jeff-3.1.1 library using Janis software.
| Thermal cross section (barn) | Fast cross section (barn) | ||||||
| Scattering | Capture | Fission | Scattering | Capture | Fission | ||
| Moderator | H-1 | 2E+1 | 2E-1 | - | 4E+0 | 4E-5 | - |
| H-2 | 4E+0 | 3E-4 | - | 3E+0 | 7E-6 | - | |
| C (nat) | 5E+0 | 2E-3 | - | 2E+0 | 1E-5 | - | |
| Structural materials, others | Zr-90 | 5E+0 | 6E-3 | - | 5E+0 | 6E-3 | - |
| Fe-56 | 1E+1 | 2E+0 | - | 2E+1 | 3E-3 | - | |
| Cr-52 | 3E+0 | 5E-1 | - | 3E+0 | 2E-3 | - | |
| Ni-58 | 2E+1 | 3E+0 | - | 3E+0 | 8E-3 | - | |
| O-16 | 4E+0 | 1E-4 | - | 3E+0 | 3E-8 | - | |
| Absorber | B-10 | 2E+0 | 2E+3 | - | 2E+0 | 4E-1 | - |
| Cd-113 | 1E+2 | 3E+4 | - | 4E+0 | 5E-2 | - | |
| Xe-135 | 4E+5 | 2E+6 | - | 5E+0 | 8E-4 | - | |
| In-115 | 2E+0 | 1E+2 | - | 4E+0 | 2E-1 | - | |
| Fuel | U-235 | 1E+1 | 6E+1 | 3E+2 | 4E+0 | 9E-2 | 1E+0 |
| U-238 | 9E+0 | 2E+0 | 2E-5 | 5E+0 | 7E-2 | 3E-1 | |
| Pu-239 | 8E+0 | 4E-2 | 7E-2 | 5E+0 | 5E-2 | 2E+0 | |
Read more about this topic: Neutron Cross Section
Famous quotes containing the words typical, cross and/or sections:
“The books may say that nine-month-olds crawl, say their first words, and are afraid of strangers. Your exuberantly concrete and special nine-month-old hasn’t read them. She may be walking already, not saying a word and smiling gleefully at every stranger she sees. . . . You can support her best by helping her learn what she’s trying to learn, not what the books say a typical child ought to be learning.”
—Amy Laura Dombro (20th century)
“It was mankind that hung on the cross for two thousand years: and a terrible god practiced his cruelty and called it “love.””
—Friedrich Nietzsche (1844–1900)
“For generations, a wide range of shooting in Northern Ireland has provided all sections of the population with a pastime which ... has occupied a great deal of leisure time. Unlike many other countries, the outstanding characteristic of the sport has been that it was not confined to any one class.”
—Northern Irish Tourist Board. quoted in New Statesman (London, Aug. 29, 1969)