ASTM C1233 - 15(2021)
Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
| Aviso: | Las normas ASTM en lectura se visualizan a través del área decliente. Los archivos no se pueden descargar |
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| Fecha edición: |
2021-10-01
En Vigor
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| Idiomas disponibles: | Inglés |
| Resumen: | This practice details the recommended method for calculating the equivalent boron content (EBC) values of nuclear elements and materials that are of potential significance as thermal neutron poisons. EBC factors are determined from the atomic weight of elements and the thermal neutron absorption cross section in barns. These may be used depending upon the actual neutron energy characteristics of the applicable reactor system. The elements aluminum, fluorine, rubidium, barium, lead, silicon, beryllium, neon, tin, bismuth, oxygen, zirconium, carbon, magnesium, cerium, and phosphorus are not required to be included in the EBC calculations as their contribution to the total poison effect is not considerably significant. |
| Keywords: | boron; neutron absorption; nuclear materials; nuclear poisons ; |
| Scope: | 1.1 This standard details a recommended practice for the calculation of the Equivalent Boron Content (EBC) for nuclear materials. The EBC is used to provide a measure of the macroscopic neutron absorption cross section of a nuclear material. EBC factors for the natural elements are determined from their atomic masses and thermal neutron absorption cross sections. This practice is illustrated by using EBC factors that are based on thermal neutron (2200 m/s) absorption cross sections. Other EBC factors may be used depending upon the actual neutron energy spectrum. 1.2 The EBC is a characteristic of a homogeneous material. Characterization of inhomogeneous materials and calculation of neutron multiplication factors require techniques that are beyond the scope of this practice. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
| ICS: | 27.120.30 - Materiales fisibles y tecnología del combustible nuclear |
| CTN: | C26.02 - C26.02 |
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Anulaciones Normas |
Anula a C1233-15 |
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Otras Relaciones |
Es referenciada por C761 - 24 Es referenciada por C0799-19 Es referenciada por D7219-19 Es referenciada por C0757-16R21 Es referenciada por C0753-16AR21 Es referenciada por D7301-21 Es referenciada por C1462-21 Es referenciada por C0781-20 Es referenciada por C0785-08R22 Es referenciada por C1065-08R22 Es referenciada por C1334-05R22 Es referenciada por C0776-17R22 Es referenciada por C833 - 23 Es referenciada por C0788-03R21 Es referenciada por C1783 - 15(2024) Es referenciada por C697 - 24 Es referenciada por C698 - 24 Es referenciada por C1793 - 15(2024) |










