After the successful operation of the fast breeder test reactor for over two
decades, India is now nearing the completion of a 500 MW (electrical)
prototype fast breeder reactor. This commercial scale power reactor is a
sodium-cooled, pool-type, mixed-oxide fuelled fast reactor. The stability
characteristics of the reactor are an important safety aspect to be studied.
In the present work, linear stability of the prototype fast breeder reactor
analysis is carried out using the transfer function method, while the
stability of the system is checked via the Nyquist criteria. For the
completeness of the study, transient analysis with various kinds of
reactivity perturbations was carried out. The response of the system in both
cases indicated that the system is stable.