Based on the theory of Lochak and the experiments of Urutskoiev, it has been suggested by Urutskoiev that, during discharges in water (fluids), light leptonic magnetic monopoles can be created in order to understand accidents in power plants. In previous papers, it was demonstrated that these processes could and should be described within the effective electroweak sector of an extended Standard Model with symmetry breaking where, according to Lochak, the magnetic monopoles are considered as excited neutrinos. For massive excited neutrinos, no conservation of magnetic charge does exist, i.e., these particles can decay. The radiative decay is due to the transmutation of an excited neutrino into an ordinary neutrino. Details of the decay process are discussed, and it is shown that massive excited neutrinos are Majorana fermions that, owing to their magnetic charge, participate in electromagnetic processes, although this charge is not conserved. Numerical estimates for transition rates and emitted frequencies are given.