ASTM C1233 Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
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ASTM International
Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
N C1233
Annotation
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.
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.
The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
Автоматический перевод:
Общепринятая практика для определения эквивалентного содержания бора ядерных материалов
Этот стандарт детализирует рекомендуемую практику для вычисления Equivalent Boron Content (EBC) для ядерных материалов. EBC используется для обеспечения меры макроскопического нейтронного поперечного сечения поглощения ядерного материала. Факторы EBC для естественных элементов определяются от их атомных масс и тепловых нейтронных поперечных сечений поглощения. Эта практика проиллюстрирована при помощи факторов EBC, которые основываются на тепловых нейтронных поперечных сечениях поглощения (на 2200 м/с). Другие факторы EBC могут использоваться в зависимости от фактического нейтронного энергетического спектра.
