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

ASTM-C1233 - 2015 R21 EDITION - CURRENT
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Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
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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.

Keywords

boron; neutron absorption; nuclear materials; nuclear poisons

To find similar documents by ASTM Volume:

12.01 (Nuclear Energy (I))

To find similar documents by classification:

27.120.30 (Fissile materials and nuclear fuel technology Including raw materials Radioactive wastes, see 13.030.30)

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Document Number

ASTM-C1233-15R21

Revision Level

2015 R21 EDITION

Status

Current

Modification Type

Revision

Publication Date

Oct. 22, 2021

Document Type

Practice

Page Count

3 pages

Committee Number

C26.02