ASTM C1233-98
Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials

Standard No.

ASTM C1233-98

Release Date

1998

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM C1233-03

Latest

ASTM C1233-15(2021)

Scope

1.1 This standard details a recommended practice for the calculation of the Equivalent Boron Content (EBC) values for elements that are of potential significance as thermal neutron poisons. The values are determined from a knowledge of the atomic weight of elements and the thermal neutron absorption cross section in barns. This practice is illustrated by using the EBC factors of Table 1 which are based on thermal neutron (2200 m/s) absorption cross sections. Other EBC factors may be used depending upon the actual neutron energy characteristics of the applicable reactor system.

1.2 The following elements do not require to be included in the EBC calculations, as their EBC factors are less than or equal to 0.0001: aluminum; fluorine; rubidium; barium; lead; silicon; beryllium; neon; tin; bismuth; oxygen; zirconium; carbon; magnesium; cerium; phosphorus. Their contribution to the total poison effect is not considered significant.

ASTM C1233-98 history

• 2021 ASTM C1233-15(2021) Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
• 2015 ASTM C1233-15 Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
• 2009 ASTM C1233-09 Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
• 2003 ASTM C1233-03 Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
• 1998 ASTM C1233-98 Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials