Short circuit current mechanical force

When using the above metals for the purpose of current carrying, their mechanical suitability must be checked with the data provided above to withstand, without permanent deformation, the electrodynamic forces that may develop during a short-circuit condition (Section 28.4.2). 

If a liquid metal flows perpendicular to the magnetic field direction (Figure 3), a potential difference across the flow duct is induced in the metal coolant this causes a high electrical current flow when the potential difference is short-circuited by the electrically conducting walls. The relationship between magnetic field (B), electrical current (I), and mechanical force (F), when the I is flowing perpendicular to B,... 

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