Template measurement for plutonium pit extracts characteristic data from-ray spectrum and the neutron counts emitted by plutonium.The characteristic data of the suspicious object are compared with data of the declared plutonium pit to verify if they are of the same type.In this paper

neural networks are enhanced as the comparison algorithm for template measurement of plutonium pit.Two kinds of neural networks are created

i.e.the BP and LVQ neural networks.They are applied in different aspects for the template measurement and identification.BP neural network is used for classification for different types of plutonium pits

which is often used for management of nuclear materials.LVQ neural network is used for comparison of inspected objects to the declared one

which is usually applied in the field of nuclear disarmament and verification.