Nuclear Science and Engineering / Volume 50 / Number 3 / March 1973 / Pages 302-306
Technical Note / dx.doi.org/10.13182/NSE73-A28986
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An activation method is proposed for in-core neutron flux distribution measurement. A neutron flux distribution being considered is transformed into integral activities by using an activation fluid circulating through a core. Then a set of measured integral activities is transformed inversely to a neutron flux distribution which is approximated by a series of shape functions, such as the Fourier series. Numerical simulation of the results reveal that typical axial neutron flux distributions in a boiling water reactor can be measured within an accuracy of ±15%.