Development of Software-Controlled Systems for Monitoring Physical Parameters of Nuclear Research Reactor Radiation
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EMATICAL MODELING IN NUCLEAR TECHNOLOGIES
Development of Software-Controlled Systems for Monitoring Physical Parameters of Nuclear Research Reactor Radiation G. N. Pikulinaa,*, M. A. Ovchinnikova, V. A. Yukhnevicha, A. S. Kosheleva, Yu. M. Drozdova, N. V. Raspopova, V. S. Majornikova, and I. M. Pickorskiya aRussian
Federal Nuclear Center–All-Russian Research Institute of Experimental Physics, Sarov, 607188 Russia *e-mail: [email protected] Received October 27, 2017; revised October 27, 2017; accepted November 30, 2017
Abstract—Multifunctional software-controlled systems for monitoring the physical parameters of nuclear research reactor radiation has been developed at the All-Russian Research Institute of Experimental Physics (VNIIEF). The paper discusses approaches to designing and principles of building such systems as a combination of software and hardware tools using techniques for the diagnosis of radiation fields developed at the VNIIEF. Keywords: neutron flux density, neutron fluence, nuclear reactor power and energy release, reactivity, gamma-radiation dose rate, software-controlled system, measuring channel, control program, user interface DOI: 10.1134/S1063778818100149
INTRODUCTION Software-controlled systems for monitoring physical parameters of nuclear research reactor (NRR) radiation have been developed at the All-Russian Research Institute of Experimental Physics (VNIIEF). The developments include universal multifunctional systems [1] that measure a wide range of physical parameters of ionizing radiation: neutron flux density, neutron fluence, nuclear reactor power and energy release, reactivity, dose rate, gamma-radiation dose, etc. Specialized software and hardware systems for measuring individual physical parameters or systems associated with a specific configuration of an experiment have become very popular [2]. We consider the approaches to design and the principles of building such systems as a combination of software and hardware tools using techniques for the diagnosis of radiation fields developed at the VNIIEF. SOFTWARE-CONTROLLED SYSTEM ARCHITECTURE The main task of the hardware and software system is to measure the parameters of nuclear radiation in all operating modes of the reactor, i.e., in conducting indirect measurements [3]. Direct measurements consist of recording primary readings of neutron and γradiation sensors, i.e., in measuring current and pulse count rate in real time. Physical values are obtained after the real-time mathematical processing of measurement results.
A number of intelligent modules for different functional purposes were designed and manufactured at the VNIIEF as the basic hardware for current and counting measuring channels: current meters, pulse count rate meters, and high voltage converters [4]. Table 1 shows the types of functional modules and the tasks they perform. Measuring instrument approval certificates have been obtained for all modules. All the above modules are hardware and software units which include a microcontroller. They can be combined
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