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    Wyświetlanie 1-5 z 5
    Tytuł:
    Innovative methodology for estimating the impact of assembly imperfections on the safety of internal panel elements in large-panel building structures
    Autorzy:
    Bieranowski, Piotr
    Rychlik, Aleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/24202358.pdf
    Data publikacji:
    2023
    Wydawca:
    Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
    Tematy:
    reinforced concrete structures
    large-panel building
    prefabrication
    FEM
    konstrukcje żelbetowe
    budownictwo wielkopłytowe
    prefabrykacja
    MES
    Opis:
    The paper presents an original proposal to assess the safety of internal panel elements in buildings implemented in the systemic structural systems of a large panel. The publication, based on the author's shell model of the large-panel building structure, presents an innovative method of assessing the impact of imperfection in internal panel elements on the safety of buildings erected on the basis of industrialized structural systems.
    Źródło:
    Modern Engineering; 2023, 2; 1--8
    2450-5501
    Pojawia się w:
    Modern Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal-hydraulic calculations for a fuel assembly in a European Pressurized Reactor using the RELAP5 code
    Autorzy:
    Skrzypek, M.
    Laskowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/148264.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    fuel assembly
    pressurized water reactor (PWR)
    safety analysis
    RELAP5
    Opis:
    The main object of interest was a typical fuel assembly, which constitutes a core of the nuclear reactor. The aim of the paper is to describe the phenomena and calculate thermal-hydraulic characteristic parameters in the fuel assembly for a European Pressurized Reactor (EPR). To perform thermal-hydraulic calculations, the RELAP5 code was used. This code allows to simulate steady and transient states for reactor applications. It is also an appropriate calculation tool in the event of a loss-of-coolant accident in light water reactors. The fuel assembly model with nodalization in the RELAP5 (Reactor Excursion and Leak Analysis Program) code was presented. The calculations of two steady states for the fuel assembly were performed: the nominal steady-state conditions and the coolant flow rate decreased to 60% of the nominal EPR flow rate. The calculation for one transient state for a linearly decreasing flow rate of coolant was simulated until a new level was stabilized and SCRAM occurred. To check the correctness of the obtained results, the authors compared them against the reactor technical documentation available in the bibliography. The obtained results concerning steady states nearly match the design data. The hypothetical transient showed the importance of the need for correct cooling in the reactor during occurrences exceeding normal operation. The performed analysis indicated consequences of the coolant flow rate limitations during the reactor operation.
    Źródło:
    Nukleonika; 2015, 60, No. 3, part 2; 537-544
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Operational Tests of a Modular Installation and Transport Assembly of Steel Arch Support in Underground Excavations
    Autorzy:
    Krauze, Krzysztof
    Mucha, Kamil
    Wydro, Tomasz
    Kutnik, Andrzej
    Hałas, Waldemar
    Ruda, Piotr
    Osowski, Dawid
    Powiązania:
    https://bibliotekanauki.pl/articles/2064564.pdf
    Data publikacji:
    2021
    Wydawca:
    STE GROUP
    Tematy:
    underground mining
    steel arch support
    modular installation and transport assembly
    safety
    Opis:
    The roof support, especially the ŁP yielding steel arch support, is transported and assembled in the face with the use of auxiliary machines. This activity in Polish underground mines causes numerous problems, which until present have not been solved. Currently, transport and assembly are carried out manually, while the roadheader and suspended rail are used only to a small extent. Therefore, the modular installation and transport assembly was developed jointly by FAMA Sp. z o. o. and AGH University of Science and Technology. The solution in question enables performing a number of functions (including transport and assembly of all kinds of support arches), which are not available in currently manufactured equipment. The proposed manipulator solves numerous problems occurring during the installation of the steel arch support in an underground mining excavation and significantly improves the process of drilling galleries. This innovative solution considerably differs from the existing ones, and its greatest advantage is versatility with regard to the cross-section and equipment of the roadway, as well as a wide range of functions. In addition, it can also be used for reloading works. The modular installation and transport assembly together with a platform, a temporary mechanized roof support and a mining machine, make up a mechanizes roadheader complex, which enables continuous mining, loading and installing the permanent support in underground workings.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2021, 4, 1; 343--354
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ergonomic Study on the Manual Component Insertion Lines for Occupational Health and Safety Improvements
    Autorzy:
    Sen, R. N.
    Yeow, P. H. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/90245.pdf
    Data publikacji:
    2003
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    ergonomic interventions
    occupational health and safety
    printed circuit assembly
    ergonomia
    warunki pracy
    bezpieczeństwo i higiena pracy
    praca przy taśmie montażowej
    Opis:
    The study aimed at reducing the occupational health and safety problems faced by the manual component insertion operators. Subjective and objective assessments, and direct observations were made in the printed circuit assembly factory. Simple and low-cost ergonomic interventions were implemented, that is, repairing chairs, reducing high workloads, assigning operators to a maximum of 2 workstations, confining machines that emitted bad smell and much noise, and providing finger work aids. The results of the interventions were reductions in operators’ work discomforts, that is, chair discomfort (by 90%), high work stress, and discomfort due to frequent change of their workstations. Their health hazards were also eliminated, that is, inhalation of toxic fumes, exposure to too much noise, and pain due to pressing sharp components.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2003, 9, 1; 57-74
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ergonomics Improvements of the Visual Inspection Process in a Printed Circuit Assembly Factory
    Autorzy:
    Yeow, P. H. P.
    Sen, R. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/90706.pdf
    Data publikacji:
    2004
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    occupational health and safety
    eye problems
    quality
    productivity
    cost savings
    ergonomia
    kontrola jakości materiału
    choroby oczu
    Opis:
    An ergonomics improvement study was conducted on the visual inspection process of a printed circuit assembly (PCA) factory. The process was studied through subjective assessment and direct observation. Three problems were identified: operators’ eye problems, insufficient time for inspection and ineffective visual inspection. These problems caused a huge yearly rejection cost of US $298,240, poor quality, customer dissatisfaction and poor occupational health and safety. Ergonomics interventions were made to rectify the problems: reduced usage of a magnifying glass, the use of less glaring inspection templates, inspection of only electrically non-tested components and introduction of a visual inspection sequence. The interventions produced savings in rejection cost, reduced operators’ eye strain, headaches and watery eyes, lowered the defect percentage at customers’ sites and increased the factory’s productivity and customer satisfaction.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2004, 10, 4; 369-385
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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