Progress of Cryogenics and Isotopes Separation


The National Conference with international participation on New Cryogenic and Isotope Technologies for Energy and Environment - EnergEn 2018 is organized by the National Research-Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Valcea with the scientific participation of the University of Pitesti and the University of Craiova and will be held at Baile Govora, in 2018.


pressure loss detection in plants with continuous monitoring by measuring the flow parameters



Sorin Gherghinescu*, Stefan-Ionut Spiridon, Gheorghe Popescu


National Institute for Research and Development for Cryogenics and Isotopic Technologies - ICIT Rm. Valcea, Uzinei Street no. 4, P.O. Box Raureni 7, 240050, Ramnicu Valcea, Romania





In this study, the thermo-dynamic characteristics of gases leak rate through a system have been studied. Different pressures versus time scenarios have been applied to a model system. Nitrogen and industrial air were used to perform the pressurized leak rate test. The thermal conductance influence was measured from both pressure-decay experiments and from constant pressure-flow experiments using gases at variable temperatures due the length of the gas supply piping. Results from the two type gas tests were compared and communicated in this paper. In the evaluation of real components, subassemblies, or systems, conductance and also the thermo-dynamical flow of the gas trough piping system of can be estimated from a simple pressure-decay measurement. Obtain values can be used to estimate the effect of thermal conductance on the leak rate, to minimize the construction complexity of the piping and also to improve the insulation factor of the refrigeration system. In cryogenic systems is important to determine the leakage of gas for the cooling power regulation and automation system. In the cryogenic distillation process gas purity and thermal regime are very important design features. This study establishes the parameters of the thermal control system and gas purity. By plotting discharge curves can be established the influence of change of parameters in the system and can locate the leakage occurred by measuring the corresponding flow. Discharge curves were plotted on an area covering the normal running of the plant. The experimental results obtained demonstrate the importance of continuous monitoring of flow in nuclear installations on the one hand due to ensuring the safety in operation and on the other hand to control the process parameters.           

                  Keywords: cryogenic systems, equilibrium parameters, pressure leakage

*Corresponding author: Sorin Gherghinescu, phone: 0250/732744; fax: 0250/732746; E-mail:   This e-mail address is being protected from spambots. You need JavaScript enabled to view it  ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it