In the performance curve for a centrifugal pump the shut-off head is the point on the graph where the flow rate is zero. Shut-off head is the vertical lift in height – usually measured in meters of water column, at which a pump can no longer exert enough pressure to move water.
Reactor Physics and Thermal Hydraulics:
J. R. Lamarsh, Introduction to Nuclear Reactor Theory, 2nd ed., Addison-Wesley, Reading, MA (1983).
J. R. Lamarsh, A. J. Baratta, Introduction to Nuclear Engineering, 3d ed., Prentice-Hall, 2001, ISBN: 0-201-82498-1.
W. M. Stacey, Nuclear Reactor Physics, John Wiley & Sons, 2001, ISBN: 0- 471-39127-1.