An optimisation methodology is presented using the primary coolant circulation system of a nuclear reactor as its case study, purpose which to find combinations selected design and maintenance parameters maximise safety minimise monetary expenditure. The parameter space was sampled by Monte Carlo method Petri net modelling used predict performance each these options. optimal solutions were then...

The radiation damage produced by energetic heavy ions in several ceramic oxides was characterized by different methods: thermoluminescence, optical absorption, fluorescence and electron paramagnetic resonance. Following ion irradiation, the thermoluminescence intensity of all the samples is shown to decrease. This can be related to the observed rise of the optical absorption in the whole wavele...

The initial design life of nuclear power plant is 40 years. In 60 year extending license application, the fatigue component should be evaluated under influence factors pressurized water reactor coolant environment. Because original used a more conservative analysis method, result could not meet requirement Cumulative usage factor RCC-M. An optimizing method studied, and as an example Safety Inj...

Since its discovery 75 years ago fission has been at the forefront of nuclear science and engineering research. Although the fission process is being used worldwide to generate safe reliable power, there are several aspects of the fission process which are still not well known. One such parameter of the fission process is the prompt fission neutron spectrum (PFNS). Although the average number o...

For exothermic fluid-phase reactions, a reactor which is cooled at the wall can exhibit multiplicity or parametric sensitivity_ Moreover, for heterogeneously catalyaed exothermic fluid-phase reactions, each of the catalytically active pellets in the reactor can exhibit multiplicity. Both forms of multiplicity can lead to thermal instability and as such have to he taken into account in reactor d...