[en] The complex system for radioanalytical data acquisition and on-line processing at experiments with short lifetime isotopes is described. The system provides for the optimal measuring time, high reliabilities of data storing and precesion evaluation. The system is controlled by the Commodore C-64 type personal computer via an interface. The system control and data evaluation program is written in SIMON'S BASIC language. 4 refs.; 3 figs

[en] From the designing point of view considered are interrelated problems of siting, protection and environmental monitoring in respect to the first Hungarian Paksh nuclear power plant under consrtuction. Initial data and necessary sensitivity of external dosimetry system are determined. Given is an external dosimetry system monitoring radiation conditions in the enviromment under normal operation and accident situations. Calculated limiting values of external irradiation dose rate and iodine - 131 isotope content are presented. Nuclear power plants operation experience shows that radioactive releases under normal operating conditions are significantly lower than the calculated limiting values. Natural background of the area can significantly exceed the nuclear power plant radiation load under normal operation. Planned system of external dosimetry may be used for prompt monitoring nuclear power plant environment under different conditions, especially in the case of increased or accidental releases

[en] In the systems for fully automatic counting and analyzing of etched nuclear tracks the image processing is made by a videocamera equipped with a microscope. The first automatic track analysis system (DIGITRACK) is reported in which the video signals are processed by a charge-coupled device (CCD) videoreceiver. The photosensitive semiconductor device is a 2.5 cm long line imager of type Fairchild CCD 121HC which converts one row of the picture through a low magnification microscope into 1728 binary signals by a thresholding logic. The picture elements are analysed by a microcomputer interfaced to a PDP-11/40 computer. For pattern recognition and analysis a software procedure is developed. The distribution of track densities and spot areas on the detector surface can be visualized on a graphic display. The DIGITRACK system has been tested for analysis of alpha-tracks recorded by CR-39 and LR-115 detectors. (author)

[en] The automatic image analysis system for scanning solid state nuclear track detectors is designed by utilizing a microdensitometer. The control of the entire system as well as the data analysis are accomplished with the IBM PC computer equipped with a FrameGrabber. The system counts the number of tracks and measures their geometrical parameters. The usage of the system is illustrated by counting rhombic tracks in mica detectors which were used for the investigation of the fusion-fission reaction ¹²C+ ²⁰⁸Pb

[en] The functional and operational descriptions on PCA/INCREMENT MEMORY interface are discussed. The following is solved with this unit: connection between the analogue signal processor and PC, nuclear spectrum acquisition up to 2²⁴-1 counts/channel using increment or decrement method, data read/write from or to memory via data bus PC during the spectrum acquisition. Dual ported memory organization is 4096x24 bit, increment cycle time at 4.77 MHz system clock frequency is 1.05 μs. 6 refs.; 2 figs

[en] The interface connecting the ICA-70 analyzer to the COMMODORE personal computer and interface connecting COMMODORE's disc drive to the IBM PC/AT personel computer are described. The first interface enables one to transmit measured spectrum data of activation analysis from the analyzer to the COMMODORE's disc for their storage and displaying data stored on the disc in a form of tables and graphs. The second interface makes it possible to transmit data stored on the COMMODORE's disc to IBM PC/AT hard disc with the purpose of spectra unfolding by programs, for example, SAMPO GAMF. 6 refs.; 5 figs

[en] The SCORPIO-VVER system includes following features: 1) Validation of plant measurements and identification of sensor failures. 2) Optimum combination of measurements and calculations to obtain precise values of important parameters. 3) On-line 3D power distribution calculation with pin power reconstruction. 4) Limit checking and thermal margin calculation allowing for surveillance of VVER core limits such as DNBR, Sub-cooling margin, FdH and FQ peeking factors. 5) Integrated modules for monitoring fuel performance and coolant activity for identification of fuel failures. 6) Predictive capabilities and strategy planning, offering the possibility to check the consequences of operational manoeuvres in advance, prediction of critical parameters, etc. 7) Convenient monitoring of approach to criticality during reactor start-up. 8) Automated transition between cycles (fuel reload). The SCORPIO-VVER core monitoring system with its flexible and modular framework successfully responses to the plant operating needs and advances in nuclear fuel cycle strategies and fuel design. Modular framework allows for easy modifications of the system and implementation of new methods in physical modules. Even if the system is installed only on VVER-440 reactors, it could be adapted for VVER-1000 needs

[en] The basic principles and equations of K-Ar determination are summarized. A magnetic mass spectrometer has been developed for the determination of Ar isotope ratios. The spectrometer is controlled by an INTEL 8080A microprocessor. The electronic moduls are self-contained and can be used in other systems, too. A programmable electrometer amplifier with varying transfer function is connected to a 12 bit analog-digital converter. Using the stored time-amplitude values the relative peaks of the spectrum can be extrapolated to the moment of gas inlet. (R.J.)

[en] Two general purposes interface cards and the corresponding software were also solve the typical counting and controlling problems. These modules have been used in developing dedicated data acquisition systems for instruments like the splitpole magnetic spectrograph, ESA-21 electrostatic electron spectrometer and the rad hard testing device. The PC-641/O parallel digital I/O card provides 64 TTL/DTL compatible digital I/O lines, interrupt input and enable lines as well as external connections to the IBM PC's bus power supplies. The PC-40CH generalpurpose counter-timer card provides 40 channels of 16 bit up/down counters plus frequency dividers from board 5 MHz crystal time base. Parts of these two cards have also been combined in one single board (the PC-10CH+800+16I combi card). (N.T.) 3 refs

[en] The SCORPIO-VVER core monitoring system has proved since the first installation at Dukovany NPP in 1999 to be a valuable tool for the reactor operators and reactor physicists. It is now installed on four units of Dukovany NPP (EDU, Czech Republic) and two units of Bohunice NPP (EBO, Slovak Republic) replacing the original Russian VK3 system. By both Czech and Slovak nuclear regulatory bodies it was licensed as a Technical Specification Surveillance tool. The monitoring system operates in two modes: in core follow mode and in predictive mode. In the core follow mode, the present core state is evaluated by a method combining the instrumentation signals and the theoretical calculation of the power distribution done by the core simulator. This procedure is followed by an automatic limit checking, where characteristics of the current state are compared to the Technical Specifications. The operator obtains relevant information on core status through the dedicated Man-Machine Interfaces. In the predictive mode, the operator can visualize the core characteristics during the transients forecasted for coming hours or days. Quick forecasts realized by the strategy generator are deeply analyzed by the predictive simulator. Similarly as in the core follow mode, characteristics of the evaluated states can be compared against Technical Specifications. Since it's first installation, the development of SCORPIO-VVER system continues along with the changes in WWER reactors operation. The system is being adapted according the utility needs and several notable improvements in physical modules of the system were introduced. The latest most significant changes were done in connection with implementation of a new digital I and C system, loading of the optimized Gd2 fuel assemblies, improvements in the area of core design (neutron physics, core thermal hydraulics and fuel thermal mechanics) and improvements in the predictive part of the system (Strategy Generator). The currently finished upgrades (Upgrade 2 at EBO 06/2009, Upgrade 5 at EDU 12/2009) includes the adaptation of the system to up-rated unit conditions as well as further improvements of methods applied in physical modules, especially as are the improvements of 3D power reconstruction methods by using the SPND detectors in fuel assemblies, as are the changes in design and methodology of the limit checking and as is the implementation of the on-line shutdown margin calculation to the system. (Authors)