Power Accident Research Articles

Young women's reproductive and health effects from the Chernobyl nuclear accident: a qualitative historical study

Background and Aims: The Chernobyl disaster of April 26, 1986 is still considered the worst nuclear power accident in terms of its long-term health effects, including both thyroid and reproductive effects. This study aims to give voice to exposed women, highlighting reproductive and chronic health issues. Methods: In-depth, narrative interviews were conducted with 18 women who experienced the Chernobyl nuclear accident as children or adolescents and later immigrated to Israel, aged 2-19 at the time of the accident and 31 to 50 at interview. Half of the women originated in high contamination towns in terms of ionizing radiation (based on cesium-137 measured at the time), and the 9/18 from low-contamination towns . The interviews were analyzed by thematic, content analysis. Results: Thyroid and hormonal imbalances were the most widespread health issues reported (10/18). Most had some chronic health issues (14/18), which often started in the years immediately following the accident. Once treated, full-term pregnancies resulted in healthy children for 14 of the 18 women. Fears of cancer and birth defects led two to decide not to procreate, one to decide to procreate at an early age, and another to decide not to get pregnant again after having one healthy child. In recalling the accident and its impact, they often fused personal memories with media accounts and stories heard. We explored whether respondents with current health problems attributed them to the radiation exposure and found that those who had family members who were ill or developed cancer, were more likely to attribute these outcomes to the Chernobyl exposure. Conclusion: Exposure to Chernobyl during their formative years was a significant life event that affected their physical, reproductive and emotional health as adults for most respondents.

Intelligent Online Partial Discharge Detection and Sensor

In order to realize the online monitoring of partial discharge in solid switch cabinet, obtain the real partial discharge power and evaluate the insulation status of the switch cabinet, an online detection device based on partial discharge in solid switch cabinet was proposed. The ultrasonic sensor and resonant circuit used by the device to collect the high frequency signal generated when partial discharge occurs and the high frequency signal was converted into the voltage signal. The voltage signal was sent to the STM32 main control chip after data preprocessing and analog-to-digital conversion. Through the conversion of the collected electrical data, the local discharge quantity was obtained and displayed on LCD screen in real time. If the detected discharge power was greater than a set value, an alarm would be automatically issued to remind the on-site power personnel to pay attention to it and prevent major power accidents caused by insulation damage. From the experimental results, it was found that the value of intermittent partial discharge collected by the developed device was 63pC, which was basically consistent with the DMS data. The experimental results showed that the device had the characteristics of simple operation and signal processing speed, high testing data real-time, and low cost, which was suitable for the real-time monitoring of the high voltage equipment in internal partial discharge. It was convenient for operators to maintain the equipment and ensure the normal operation of the equipment, which was of great significance to improve the reliability of power supply.

Analysis of Rod Withdrawal at Power (RWAP) Accident using ATHLET Mod 2.2 Cycle A and RELAP5/mod 3.3 Codes

The system code ATHLET (Analysis of THermal-hydraulics of Leaks and Transients) is being developed by the Gesellschaft für Anlagen-und Reaktorsicherheit (GRS) mbH in Garching, Germany. In the paper, an overview of activities performed at Faculty of Electrical Engineering and Computing (FER), University of Zagreb, in application of system code ATHLET in transient analyses for NPP Krško (NEK) is presented. Newly, the NEK input deck for the released ATHLET version (Mod 2.2 Cycle A) has been developed. For that purpose, the NEK data base that has been developed and maintained at FER for the last two decades primarily for development of standard input deck for RELAP5 code was used. The ATHLET model has been validated by analyzing the Rod Withdrawal At Power (RWAP) accident at nominal power. The results for steady state calculation as well as RWAP transient were assessed against the analysis performed by RELAP5/mod 3.3 code. In both ATHLET and RELAP5 calculation, the RWAP accident was simulated by constant reactivity insertion rate equal to 2.4 pcm/sec. For ATHLET analysis, two fluid dynamic options were tested for the primary side: a) base case analysis with 5 conservation equations and mixture level model and b) two-fluid model with separate conservation equations for liquid and vapour phases for all the volumes except for the pressurizer where 5 equations+mixture level model was retained. The Steam Generators (SGs) were built using basic ATHLET elements together with the dedicated separator model. For RELAP5/mod 3.3 analysis, a standard option with thermal and mechanical non-equilibrium (6 equations) was used. The results of the steady state calculation for the ATHLET model have shown a very good agreement with RELAP5 calculation. In the transient analysis very small differences for the main physical parameters between ATHLET and RELAP5 as well as between the two ATHLET models were obtained.

Radioactive particles from a range of past nuclear events: Challenges posed by highly varied structure and composition

While they have appeared only recently in earth's history, radioactive particles from anthropogenic sources are widespread in global environments and present radiological harm potentials to living organisms. Exposure potentials vary greatly, however few studies examine a wide range of source and particle types. Here we compare a varied set of particles from past nuclear fission and non-fission sources in Australia of highly diverse magnitudes, release modes, and environments. The radiochemistry and microscopy methods revealed that numerous radioactive particles persist in soils 60+ years after their release events. Particles can be distinguished by their Ca/Fe and Si/Fe elemental ratios, which in this study range over orders of magnitude and reflect the materials available during their individual formation events. The particles with Si- and Ca-dominant compositions persisted in corrosive environments (e.g., marine). Internal fracturing is more prevalent than previously reported, and fracturing is greater in Ca-rich vs. Si-dominated matrices. The fractures often form connective pathways from the interior to exterior surfaces, increasing the potential to leach radionuclides into a host organism or the environment. The particles from nuclear testing have dominant 239+240Pu activity concentrations, relative to 90Sr and 137Cs, which increases long-term radiological hazard from alpha emissions if inhaled or ingested, and contrasts with particles from nuclear power accidents (e.g., Fukushima). Additional physical/chemical/radiological measurements are needed to fully understand long-term fate and hazard potentials.

福島第一原子力発電所事故から10年

福島第一原子力発電所事故から10年

Research on operation status and fault deduction system design of transformer in large sports venues

The problem of low transformer load rate (less than 60%) in the actual operation of large stadiums and gymnasiums has affected the waste of power energy and the improvement of power cost in the industry. The transformer failure of large stadiums and gymnasiums may further cause serious power accidents in the future. In order to solve the above problems, firstly, this paper analyzes the transformer load rate data of the two large sports venues(Nanchang International Sports and Tennis Stadium in Jiangxi Province)and probes into the design data and calculation coefficient of the transformer of the large sports venues; Secondly, this paper puts forward some suggestions on how to improve the operation load rate of transformers in stadiums from the aspects of transformer design and selection of demand coefficient; Thirdly, the paper establishes the system hardware environment by using firewall, special switch and information database, and then realizes the design of software deduction program through correlation analysis, fault diagnosis and cluster deduction, and completes the design of transformer fault deduction system in large sports venues. Finally, the results clearly show that the transformer load rate is relatively low in large sports stadiums(the highest value is only about 55% and well below the 60% standard). On other hand, compared with the traditional system and based on big data association, the average relative errors of fault points 1, 2 and 3 decreased by 67.8%, 56.4% and 51.6% respectively and the diagnosis time has also been greatly shorten by the transformer fault deduction system. In short, this paper uses association rules to mine and obtain transformer fault characteristics, combined with the advantages of virtual reality technology, designs an effective and reliable transformer fault deduction visualization system for large sports venues.

Feasibility of producing cement-based sacrificial materials with strontium ferrite: A preliminary study

The safety of nuclear power plant can be improved via core catcher, and cement-based sacrificial materials are widely used in most core catchers because of their simple construction process and the low manufacturing cost. This paper carried out a preliminary investigation to explore the feasibility of using strontium ferrite to prepare cement-based sacrificial materials. The effects of strontium ferrite on the room temperature and high temperature properties of cement mortar were systematically studied in the work. In addition, the damage evolution of cement mortar containing strontium ferrite subjected to elevated temperatures was also identified according to the damage mechanics theory. It was found that, (1) the addition of strontium ferrite led to the deterioration of the mechanical properties, microstructure and pore structure of cement mortar; (2) it was feasible to prepare cement-based sacrificial materials containing strontium ferrite that met the requirements on basic properties like mechanical properties, free water content, volume stability, and the high temperature integrity by controlling the content of strontium ferrite; (3) the correlation between the internal damage of cement mortar and the temperature could be described by Weibull Distribution Model, which provided a basis for the identification and evaluation of serious nuclear power accidents.

Research on Local Topology Tracking of Power Grid Based on Graph Theory

Power network topology identification, judgment, and tracking are the basic functional components of power system guarantee system and security management system. They can provide basic network structure data for other application software programs of power system. However, the traditional power grid topology method is not easy to implement and provides less relevant data that can be accurately analyzed, so that relevant personnel cannot fully understand the state of the power grid and give accurate commands, resulting in serious power accidents. Therefore, this paper proposes the research of power grid local topology tracking based on graph theory and constructs the power grid local topology tracking algorithm based on graph theory. The experimental results show that the local topology tracking algorithm based on graph theory can track the local topology of power grid quickly and effectively. Compared with the traditional method based on priority search, although the first power grid topology takes a relatively long time, it greatly improves the search and processing time after each time and has high efficiency in local topology. This shows that the local topology tracking algorithm based on graph theory needs less computation when carrying out the local topology of power grid. At the same time, the theory of power grid local topology tracking algorithm based on graph theory is relatively simple and easy to time, which is more practical than the traditional method.

A comparative study of reactivity feedbacks including in-pin motion and their impact on UTOPA in a 600 MW fast reactor

The design experience of PFBR (Prototype Fast Breeder Reactor) gives confidence in designing advanced Sodium cooled Fast Reactors (SFR) with improved economy and passive safety features towards enhanced safety. In this regard, Fast Breeder Reactor (FBR) is optimised with 600 MWe leading to better economy. To prevent severe core damage & large radioactivity release to the public and also to enhance the safety, improved inherent safety characteristics are adopted with passive shutdown features. Important safety measures taken to improve inherent safety are the optimization of sodium void reactivity beneath 1 $, which is in line with the current international thinking. To incorporate the enveloping beyond design basis events (BDBE) within the Design Extension Condition (DEC), additional passive safety mechanisms are envisaged to strengthen the reactor safety and practically eliminate the probability of Core Disruptive Accidents (CDA). One such BDBE is Unprotected Transient Over Power Accident (UTOPA), in which uncontrolled withdrawal of one control rod leads to rise in power and fuel temperature. Under UTOPA, it is possible for fuel to melt and undergo in-pin fuel motion through the available central hole. Upon initiation of melting, fission gases trapped within the fuel microstructure are released into the pellet cavity along with molten fuel. Consequently, a multi-phase flow occurs inside the pellet cavity, with several hydrodynamic effects influencing the fluid motion. The relocation of molten fuel from high fuel void worth to low fuel void worth region results in a negative reactivity feedback. This in-pin fuel motion or squirting feedback reduces the total reactor power as well as the hot-spot clad and coolant temperatures. With change in reactor power during UTOPA, the balance of the plant gets affected. This results in a change in the inlet coolant temperature, which affects the overall core temperature profile and its respective feedbacks. Considering the above said arguments, UTOPA study has been carried out with different initial conditions such as Constant Inlet Coolant Temperature (CICT), Time Dependent Inlet Coolant Temperature (TDICT), with and without In-Pin Fuel Motion (IPFM) feedback. Comparisons of the results are made to get better understanding of various feedbacks and their impact on UTOPA, highlighting the importance of in-pin fuel motion reactivity feedback in a medium sized fast reactor core. From the study, it is concluded that the case without considering IPFM feedback gives the most conservative results and if the transients converge to a safe state without considering IPFM feedback then, the transients are expected to settle down to a safe state with IPFM feedback.

Simulation of loss of off-site power accident of CN HCCB TBS

Helium Cooled Ceramic Breeder Test Blanket System (HCCB TBS) is proposed by China, which will be tested in ITER facility to validate the tritium breeding blanket technology. Test Blanket Module (TBM) is the core component associated with its helium cooling system (HCS) and other ancillary systems. The accident analysis is necessary during the preliminary design process, and the results obtained provide safety feedback to the following design work. Loss of Off-site Power (LOSP) is one of the design basis accidents (DBA), and is simulated using the best estimated code RELAP5 MOD3.4. For the safety simulation, besides the thermal conductive and convective model, the radiation model is adopted as well. The influence of the natural circulation of the HCS primary loop and the necessity of the Class III power supply (safety class) are discussed. The simulation results show that the peak temperature of the structure material exceeds the design temperature (550 °C) for short duration, which has almost no impact on the structure. In the meantime, the duration of the temperature over 550 °C drops sharply while the natural circulation and the Class III Power are considered. The results verify the integrity and the safety of the HCS primary loop during the LOSP accident.

Optimal dispatching strategy for power emergency supplies distribution considering the cooperation of supply reserve points

Power accidents in extreme conditions have seriously threatened the safe operation of the power system. Therefore, the research on optimal dispatching strategy for power emergency supplies in extreme conditions is the focus of power companies. According to the strong timeliness and weak economy of extreme conditions, this paper puts forward a two-layer optimization model of power emergency supplies distribution: according to the reserve and demand of supplies supply point and distribution point, an optimal dispatching model of power emergency supplies is put forward at the bottom level considering the time factor. At the same time, considering the time sequence evolution of extreme conditions, the optimal dispatching model of power emergency supplies is proposed to ensure that the power emergency supplies can still meet the demand after the extreme conditions deteriorate. Finally, the comprehensive learning particle swarm optimization algorithm is used to solve the problem, and the example results show that the model is effective and reasonable.

Assessment of PSA Level 2 for core catcher design using a combined probabilistic and deterministic method for a case study: IR-360 NPP

Mitigating of molten corium in severe accidents is a vital concern in safety of Nuclear Power.Plants (NPPs). As one of the main features, core catcher is provisioned in the design of NPPs. In order to appropriately design an ex-vessel core catcher, numerous core damage (CD) sequences with vessel breach are required to be studied and analyzed, which requires massive efforts. Therefore, this study intends to develop a comprehensive hybrid method, to extract a logical number of CD sequences with bounding thermal hydraulic parameter for core catcher design. Such method interprets the result of Level 2 Probabilistic Safety Analyss (PSA), from both the probabilistic and deterministic perspectives. For this analysis, high pressure, high-temperature massive melt volumes are considered as core catcher bounding parameters. Moreover, a multi-level qualitative and quantitative screenings is accomplished on the list of Plant Damage States (PDSs), to screen the candidate CD sequence(s) with vessel breach. The thermal hydraulic parameters of the screened CD sequences are subsequently studied using MELCOR code, to conclude with the final list of worst sequences, regarding the core catcher design. This study is applied for IR-360 NPP as a case study. In the worst case scenario, the core catcher shall handle a CD sequence with pressure about pressurizer safety valve set point, temperature of 2500 K and corium of 82 tones. According to the results, among the entire CD sequences, a Large Break Loss of Coolant Accident (LB-LOCA) and Loss of Offsite Power (LOOP), induced CD sequence are identified as the most severe sequences for the core catcher design.

Risk Analysis and Management of Construction and Operations in Offshore Wind Power Project

Many countries have increased the use of renewable energy and strongly promoted offshore wind power (OWP). However, OWP in Asia is in the preliminary stage of development, for which no precedents exist. The literature on wind energy generation has mostly investigated the causes of onshore wind turbine accidents and risk prevention, and more work on the risks associated with domestic OWP is required for energy market development. According to statistics on international wind power accidents, most offshore accidents occur in the construction and operation stages. Therefore, this work investigates risk management in the construction and operations of offshore windfarms in Taiwan. The goal is to help decision-makers to understand better the risks of the industry and so more effectively manage them. In this study, risk factors are identified from organizing data in the literature, and research methods and action strategies are developed. Research and analysis follow the risk management steps in the PMBOK® Guide (A Guide to the Project Management Body of Knowledge). The risk rankings and preventive measures that are based on the results of this study can serve as references for relevant industry personnel in island cities and nearby Asian countries to reduce risk in the management of OWP projects.

Determining the Optimal Method for Analyzing Specific Accidents (Case study: Falling accidents in the construction project of a combined cycle power plant)

Introduction: Today, accident investigation and analysis is an important component of safety programs in preventive measures. Incident investigation involves collecting all the information and actual interpretations of an incident, analyzing information to find out the causes of the incident, and writing an incident report.
 Methods: This descriptive-analytical article was conducted to determine the most important criteria for investigating and selecting the techniques of accident investigation as well as analyzing and selecting the best method of accident analysis in the events of the power plant industry. In this research, previous research studies were studied and expert opinions were collected with regard to the most important criteria for choosing a specific accident analysis method. Later, the 4 accident analysis methods was applied in a special power plant accident and the decision matrix was designed based on the strengths and weaknesses of the model formation. Finally, these four methods were prioritized using the Topsis decision-making method.
 Results: The key factors in investigating the main criteria for selecting an incident analysis method included the ability to understand the sequence of events in the model, identifying the root causes, descriptiveness and ability to provide reasons for managers and specialists, the need for technical experts, and the time criterion. The TRIPOD BETA method was selected as the best method for analyzing the power accidents.
 Conclusion: The TRIPOD BETA method was introduced as the most effective method for investigating power plant accidents.

Critically assessing and projecting the frequency, severity, and cost of major energy accidents

Although energy systems are well known to lead to positive or negative externalities, one less explored attribute has been a rigorous historical and future looking assessment of energy accidents. In this study, we analyze an extensive dataset of 4,450 energy accidents from 1800 to 2018 across eleven energy systems. Our analysis reveals that these collective energy systems resulted in more than 278,000 human fatalities and approximately $421.3 billion in economic damages. Historically, coal accidents are the most frequent, accounting for almost half of all accidents. In terms of severity, accidents at hydroelectric dams were the most fatal, accounting for 67 percent. In terms of cost, nuclear power accidents are by far the most expensive, accounting for 62 percent of damages. Coupling our data and an econometric model with future projections of energy demand underscores the magnitude of the trends identified: 986,000 to 1.72 million potential energy accident deaths in 2040, as well as almost $1 trillion in damages. This leads to compelling policy implications, especially concerning the need for safety improvements in energy systems such as bioenergy and nuclear power, as well as the need for the IEA and IRENA, among others, to begin to better track and account for energy accident trends. We find that across all accidents, fuel extraction and processing, transmission and distribution, and transportation have the most fatalities, and yet conversion and operation, transmission and distribution, and transportation have the most damages. Moreover, achieving strong climate goals leads to an unacceptably higher risk of accidents and human health and economic consequences. Finally, as its economic development propels increases in energy consumption, Africa will become the future center for energy accident fatalities.

Analysis of Topographic Features Based on Yunnan Fire

The Yunnan power grid has the characteristics of wide distribution and large geometric size, which makes the power grid vulnerable to natural disasters such as wildfires. The unique topography and climatic conditions of transmission lines crossing mountains, forests and other zones can easily lead to the outbreak of mountain fires, or even the tripping of transmission lines. In serious cases, transmission towers may be destroyed, thus causing major power accidents. The occurrence of mountain fire is closely related to topographic factors, and the change of each topographic factor (elevation, slope, slope direction, etc.) has a certain influence on fire. This paper mainly studies the relationship between three terrain factors and fire. Based on the statistical analysis of remote sensing data from 2005 to 2020, the terrain features and their influence of fire spots in Yunnan province were analyzed. The results show that most of the fires occur within the range of 1000-2000m above sea level, and the fires occur frequently. The frequency of fire occurring below 1000m and above 2000m is low. The occurrence frequency of fire is higher in the gentle slope range, among which, the number of fire point samples is the largest within the range of 5°-15°, followed by 0°-5°and less than 15°.In this paper, eight slopes are divided to make statistics of fire points, and the number of fires in different slopes also fluctuates, among which the south slope has the highest fire risk, accounting for 16.0%.The West Slope accounted for only 10.0%, with the lowest fire risk. Terrain factor is a fixed variable that has a fixed influence on the regional fire risk. Therefore, terrain analysis of fire is of great significance for the prevention of mountain fires in power grid.

Design of Climbing Robot for Power Transmission Tower Maintenance

Periodic maintenance of transmission lines is a necessary guarantee for stable power transmission and avoiding serious power accidents. In order to reduce the safety risk of the first person climbing the transmission tower and the last person going down the tower when climbing the transmission tower manually, this paper develops an auxiliary climbing robot for the maintenance of transmission tower based on the bionic climbing principle. It includes the modular mechanical structure of the main body lifting, obstacle crossing telescopic, terminal clamping, and body jacking, as well as airborne motion control system and hierarchical control system of upper computer monitoring terminal. The comprehensive test results of indoor and outdoor simulated transmission tower environment show that the robot system can effectively complete the high-altitude climbing of power tower, and ensure the follow-up tasks of hanging, dismantling, and maintenance of safety anti-falling device.

Influence of steam heat transfer tube damage characteristics on burst pressure

The corrosion damage and leakage of heat transfer tube of steam generator were important factors of nuclear power accident, which is closely related to the national nuclear power production safety and people's life and property. The influence of the size change of cylindrical defect on burst pressure of inconel690 alloy heat transfer tube was studied by finite element simulation and experimental measurement. According to the simulation and test data, the relationship between burst pressure and damage parameter is established. The results show that for cylindrical defects with small depth, there is an extreme point of cylinder damage diameter b which makes the damage maximum, which makes the burst pressure at a minimum. The research results can provide reference for accurate evaluation of residual life of heat transfer tubes.

Probabilistic Safety Analysis for Loss of Offsite Power Accident in Dual-units Nuclear Power Plant

In order to explore the risk assessment method of the multi-unit nuclear power plant site, this paper selects the dual-unit plant nuclear site to analyze lose off-site power accident. By combining and improving the single-unit ET/FT model, to establish the dual-unit ET/FT model. From the analysis of the accident sequence, it can be concluded that the common cause failure of equipment is the main challenge faced by the dual-units. Especially the RPC sub-channel in the reactor protection system and the failure of emergency diesel engine circuit breaker. As can be seen from the high proportion of core CD occurring simultaneously in both uints, it has a great significance to study the risk of mult-units sites.

A Conventionalist Approach to Human Actions in Classical Kalam With Regards To the Theory of Motion in Modern Anatomy

İslâm düşüncesinde var olan kelâmî meselelere yeni yaklaşımların geliştirilebilmesi için varlık alanını açıklama hususunda bilim adamları tarafından yürütülen nazarî tartışmalarda bilimin verilerini dikkate almak gerekir. Öyle ki İslâm dininin esaslarını temellendirip savunma vazifesini üstelenen kelâm âlimleri hem varlığı hem de Allah’ın âyetlerini anlamada bilimle iç içe bir teoloji oluşturmuşlardır. Günümüze baktığımızda bilimin geçtiğimiz yüzyılda gerçekleştirdiği keşif ve kuramlarla geçmişe göre ciddi bir ilerleme katettiğini görüyoruz. Her bilim, kendi problem alanında kalmak, kendi yöntemini ve kimliğini korumak kaydıyla, diğer disiplinlerin yöntemlerinden ve verilerinden yararlanma imkânına sahiptir. Kelâm ilmi açısından bakıldığında, onun da kendi problem alanında kalarak diğer disiplinlerin yöntem ve verilerinden yararlanmaya imkân tanıdığını söyleyebiliriz. 
 Modern bilim açısından bakıldığında hareket sistemi, canlıların hareket etmesini sağlayan yapılar birliğidir. İskelet sisteminin yapıları olan kemikler ve eklemler, hareket sisteminin pasif elemanlarıdır. Kaslar ise hareket sisteminin aktif elemanları olup kemik ve eklemlere etki ederek vücudun hareketini sağlar. Kas dokusu kemiklere yapışarak vücuda şekil verirken aynı zamanda hareket işinin ortaya çıkmasını sağlar. Hareketi sağlayan en önemli sistemlerden biri de sinir sistemidir. Çünkü bir insanda hareketin olması için kasların kasılması, kasların kasılması için de kasların uyartı alması gerekmektedir. İşte bu kasılmanın meydana gelmesini sağlayan sistem sinir sistemidir. İnsan vücudunda kasılmanın gerçekleşebilmesi için enerji de gerekir. Kaslar enerjilerini ilk olarak kas hücrelerinde hazır bulunan ATP molekülünden sağlayarak hareket için enerji oluşturur.
 Klasik kelâm âlimlerinin hareket teorilerine bakıldığında insan fiillerinin meydana gelmesini kudret kavramı üzerinden şekillendirdikleri görülmektedir. Âlimler, kudreti yapısı itibariyle mâna ve bedensel sağlamlık diye ayırırken, mâhiyeti itibariyle araz nitelemesini yapmışlardır. Bu bağlamda kelâmcıların insan fiillerinin oluşumu için zorunlu olarak kabul ettikleri kudretin günümüz bilimindeki karşılığının hareket sistemi olduğunu söyleyebiliriz. Âlimlerin insan fiilinin meydana gelmesi için kudretin bir yapısı olarak kabul ettikleri mana, günümüz biliminin hareket sistemi çerçevesinde ele alındığında, kasları harekete geçiren elektriksel aktivite olarak kabul edilebilir. Kelâm âlimlerinin kudret tanımlarında fiziksel yetkinliğe de vurgu yaptıkları görülmektedir. Bu noktada Eş’ariler uzuvların selameti, Mu’tezile, organların bulunması ve onların afetlerden uzak olması, Mâturîdîler de vasıtaların sağlıklı olması şeklinde bir tanım sergilemişlerdir. Bu kavramlarla kelâm âlimleri, insanın hareketi yapabilmesi için bedeni yeterliliğe de sahip olmasını kastetmişlerdir. Bilimsel olarak hareket sisteminde biyolojik ve fiziksel yeterlilik olarak kabul edilen yapılar, iskelet sistemi, kaslar ve sinir sistemidir. Dolayısıyla kelâm âlimlerinin kudret tanımında vurguladıkları fiziki donanımın sağlamlığının, bilimsel açıdan iskelet sistemi, kaslar ve sinir sistemine tekabül ettiğini söyleyebiliriz. Kelâm âlimlerinin kudret konusunda tartıştıkları konulardan biri de kudretin arazlığı meselesidir. Onların, kudreti araz nitelemelerinin nedeni, onun geçiciliğine vurgu yapmak ve bunun Allah tarafından yaratıldığını ortaya koymaktır. Öyle ki modern bilime bakıldığında insan uzuvlarının hareket etmesi için beyinde elektriksel aktivitenin oluşması gerekmektedir. Bu elektriksel aktivitenin meydana gelmesi de insandan bağımsızdır. Elektriksel aktivitenin insandan bağımsız bir şekilde meydana gelmesi, kelâm âlimlerinin araz nitelemesine uyduğunu göstermektedir. Netice itibariyle kelâm âlimlerinin insan hareketi için oluşturdukları kudret teorisinin günümüz biliminin ortaya koyduğu hareket sisteminde bir karşılığının olduğunu söyleyebiliriz.