Paragraph 186 DEFINITIONS OF TERMS IN THIS ANNEX

“Boron equivalent” (BE) is defined as:

BE = CF \times Concentration of element Z in ppm

where

CF is the conversion factor = \frac{gamma Z \times A B}{gamma B \times A Z}

and gamma_B and gamma_Z are the thermal neutron capture cross sections (in barns) for boron and element Z respectively;
and A_B and A_Z are the atomic weights of boron and element Z respectively;