Operation of Nuclear Reactor with defected fuel can result in excessive radioactive contamination which makes maintenance work around the heat transport equipments, piping and tubing very difficult. Besides, increased release of fission products, in turn, increases the radioactivity levels in various areas of Reactor Building and also the radioactivity discharged to the environment which can affect people and disrupt safety. Presently in the Indian Pressurized Heavy Water Reactors (PHWRs), the presence of failed fuel in the core is detected by offline measurements of I-131 activity in the heat transport system and Delayed Neutron Monitoring System. These systems have limitations of being sample based systems which continuously cannot monitor the increase in radioactivity due to fuel failure. High purity germanium detector monitoring is proposed by me as an introduction of continuous monitoring of fission product activity which will increase the efficacy of the Nuclear Reactors in detection of defected fuel thereby increasing the safety of the plant.