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Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
Automatische name übersetzung:
Standard Praxis zur Bestimmung Equivalent Boron Inhalt von Kernmaterial
NORM herausgegeben am 1.6.2015
Bezeichnung normen: ASTM C1233-15
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.6.2015
SKU: NS-591303
Zahl der Seiten: 3
Gewicht ca.: 9 g (0.02 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
boron, neutron absorption, nuclear materials, nuclear poisons ,, ICS Number Code 27.120.30 (Fissile materials and nuclear fuel technology)
Significance and Use | ||||||||||
4.1 Use of this standard practice yields an equivalent boron content (EBC) that can be used to characterize the neutron-absorbing properties of a nuclear material. The elements included in the calculation are typically chosen so that the EBC represents either the entire material (for example, for a moderator) or the impurities in the material (for example, for a nuclear fuel). This practice is typically used for materials in which thermal neutron absorption is undesirable. The EBC is not intended for use as an input to any neutronic calculation. The EBC factors in Table 1 were selected to represent neutron absorption in water reactors under normal operating conditions. It is the responsibility of the user to evaluate their suitability for other purposes. 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. |
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2. Referenced Documents | ||||||||||
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Historisch
1.1.2015
Historisch
1.7.2012
Historisch
1.2.2015
Historisch
1.6.2011
Historisch
1.6.2012
Historisch
1.1.2008
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