Research and Application of Risk Assessment Methodology for Power Station Boiler Superheaters

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Fujun Liu ◽  
Shuai Kong ◽  
Zhangwei Ling ◽  
Qiang Li ◽  
Yueqiang Qian ◽  
...  
Keyword(s):  
Risk Assessment ◽  
High Temperature ◽  
Good Effect ◽  
Power Station ◽  
Knowledge Application ◽  
Risk Levels ◽  
Modification Factor ◽  
Erosion Factor ◽  
Equipment And Pipelines ◽  
Risk Assessment Methodology

Risk-based inspection (RBI) has been applied to good effect in relation to pieces of equipment and pipelines in the petrochemical industry worldwide, but to the best of our knowledge application of RBI to power station boilers has not hitherto been reported. The tubes of the four key components, namely, the economizer, the water-cooling wall, the superheater, and the reheater, are prone to blast due to direct fire heating. Such a blast always causes unplanned shutdown and has severe safety implications. Based on the “API 581-2000” code (Risk-Based Inspection Base Resource), the failure mechanisms of power station boilers have been studied, and the high-temperature smoke erosion factor and high-temperature creep factor have been calculated. Then, considering specific situations in China, such as material quality and extended service, a failure modification factor based on remaining life has been proposed. Finally, two risk assessment projects have been carried out; after delineating the risk levels of the tubes, appropriate management suggestions have been proposed. The obtained data should provide some technical support for the application of RBI to power station boilers.

scholarly journals An integrated risk assessment for maintenance prediction of oil wetted gearbox and bearing in marine and offshore industries using a fuzzy rule base method

2020 ◽  
Vol 234 (2) ◽  
pp. 313-331
Author(s):  
Maurice Asuquo ◽  
Jin Wang ◽  
Lihong Zhang ◽  
Geraint Phylip-Jones
Keyword(s):  
Risk Assessment ◽  
Fuzzy Rule ◽  
Assessment Model ◽  
Rule Base ◽  
Wear Rates ◽  
Risk Levels ◽  
Integrated Risk Assessment ◽  
Integrated Risk ◽  
Base Method ◽  
Risk Assessment Methodology

This article presents an integrated risk assessment methodology for maintenance prediction of oil wetted gearbox and bearing in marine and offshore machinery with emphasis on ship cranes. Predictive maintenance uses important parameters measured in the equipment to ‘feel’ when breakdown is eminent. This type of maintenance intends to make interventions on machinery before harmful events may occur. This article assesses the risk levels of bearing and gearbox, which are the most sensitive components of the ship crane using fuzzy rule–based judgement for common elements and their sources. This will provide the ship crane operators with a means to predict possible impending failure without having to dismantle the crane. Furthermore, to monitor the rate of wear in gearbox and bearing of a ship crane, the ship crane reliability, and a trend to provide an operational baseline of data that will help the engineers to detect abnormal wear rates as they develop, is established. Within the scope of this research, a risk assessment model is developed for determining the risk levels of a crane’s components and recommending solutions using all the diagnostic capability obtainable for effective condition monitoring of the gearbox and bearing in ship cranes.

RBI Technology for Boiler Superheater of Power Station

2010 ◽  
Author(s):  
Fujun Liu ◽  
Shoubao Ding ◽  
Shuai Kong ◽  
Dan Song ◽  
Dongming Hu ◽  
...  
Keyword(s):  
High Temperature ◽  
Petrochemical Industry ◽  
Failure Mechanisms ◽  
Economic Loss ◽  
Probability Of Failure ◽  
Water Cooling ◽  
Remaining Life ◽  
Power Station ◽  
Modification Factor ◽  
Power Station Boiler

Risk-Based Inspection (RBI) has been wide used in petrochemical industry all over world with good performance. But its application in power station boiler is rarely reported. The “four tubes” of the power station boiler, namely economizer, water-cooling wall, superheater and reheater tubes, are prone to blast due to the direct fire heating, and it causes non-plan shutdown and leads to severe influence to safety. In this paper, the failure mechanisms of power station boiler were analyzed, the calculation of modification factors for high-temperature smoke erosion and high-temperature creep was researched. Considering the specific situations in China, the probability of failure modification factor based on remaining life was proposed. Then, the method of economic loss calculation was established based on the differences between the petrochemical equipment and the power station boilers, and the proper classification scope was established according an investigation. At last, a superheater project was carried out, the risk was fixed and the proper management and inspection suggestions were proposed.

Risk assessment of the impact of atmospheric emissions from a preparation plant on population health

2020 ◽  
pp. 184-188
Author(s):  
V. V. Kislitsyna ◽  
Yu. S. Likontseva ◽  
D. V. Surzhikov ◽  
R. A. Golikov
Keyword(s):  
Risk Assessment ◽  
Population Health ◽  
Sio2 Content ◽  
Processing Plant ◽  
Background Concentrations ◽  
Chronic Intoxication ◽  
Risk Levels ◽  
The Impact ◽  
The City ◽  
Risk Assessment Methodology

Introduction. Determining the relationship between the impact of environmental factors and the health status of the population based on the risk assessment methodology is an urgent problem of preventive hygiene. The city of Novokuznetsk in the Kemerovo region, which is a major center of the metallurgical and coal industry, is characterized by a particularly difficult environmental situation.The aim of the study is to assess the risk to population health from air pollution from the emissions of a coal-processing plant.Materials and methods. The work used the volume of maximum permissible emissions of the central processing plant “Abashevskaya”. Calculations of maximum and average annual concentrations of pollutants were performed using the “EcoCenter-Standard” program, based on “Methods for calculating the dispersion of emissions of harmful (polluting) substances in the air”. Population health risks were calculated in accordance with the “Guidelines for assessing public health risks from exposure to chemicals that pollute the environment”. The resulting risk values were compared with acceptable values. Also, the values of risk levels were determined considering background concentrations.Results. Priority pollutants were identified: nitrogen dioxide, nitrogen oxide, carbon monoxide, sulfur dioxide, carbon (soot), inorganic dust with a SiO2 content of less than 20%, inorganic dust with a SiO2 content of 20–70%, benzene, manganese and its compounds. The maximum and average concentrations of pollutants were determined and the MPC exceeded at the selected calculation points. It was found that the risk levels of immediate action are zero. The risk levels of chronic intoxication range from 3×10–8 (manganese and its compounds) to 0.003 (inorganic dust with a SiO2 content of less than 20%). The highest total level of risks of chronic intoxication (0.006) is observed in the Baidaevka district. This is due to the location of pollution sources. The highest hazard indexes are also observed in the neighborhood Baidaevka. The hazard coefficients for all substances do not exceed “1”, which indicates that the population is not significantly likely to develop harmful effects with daily intake of the substance during life, and such an impact is acceptable. According to the data obtained, soot and benzene as carcinogenic substances do not pose a danger. The total values of the risks of immediate action, chronic intoxication and carcinogenic risk do not exceed the acceptable level. The total values of the risks of chronic intoxication, taking into account background concentrations, exceed the acceptable level by 2.9–4.1 times.Conclusion. Emissions from the coal-processing plant contribute to air pollution in the city, without significantly affecting the health of the population. The use of the risk assessment methodology is necessary to identify the most unfavorable areas of the city and pollutants that contribute most to the health of the population.The authors declare no conflict of interests.

scholarly journals Risk Mapping Based on Risk Assessment Semi-Quantitative Method as a means for Resilience Strengthening Support in Tr anscarpathia

2021 ◽  
Vol 2 (80) ◽  
pp. 9-32
Author(s):  
Rafał Wróbel ◽  
Joanna Kozioł ◽  
Karolina Tyrańska-Wizner
Keyword(s):  
Risk Assessment ◽  
Sustainable Development ◽  
Sustainable Development Goals ◽  
Living Environment ◽  
Risk Mapping ◽  
The Sustainable Development ◽  
Risk Levels ◽  
Development Goals ◽  
Risk Maps ◽  
Risk Assessment Methodology

The occurrence of natural and man-made hazards usually leads to the emergence of consequences that affect the living environment. Risk assessment as a process helps to comprehend risk. A risk assessment based on complex semi-qualitative approach to probability of hazard with specified consequences occurrence makes it possible to designate risk levels. In the Transcarpathian region the assessed risk levels distribution has been visualized on risk maps. Such risk maps as a form of risk communication may be used to support resilience strengthening regarding identified hazards and its impact on the society, infrastructure and environment. Based on conducted research, a risk assessment methodology and risk mapping methodology were proposed. Moreover, the usage of proposed methods was referenced to the resilience strengthening and its influence on the sustainable development of the Transcarpathian region. The proposed tool is a solution that is correlated to 30 innovations linking dedicated Disaster Risk Reduction with Sustainable Development Goals.

SPATIAL MAPPING OF URANIUM IN GROUNDWATER AND RISK ASSESSMENT AROUND AN ATOMIC POWER STATION IN INDIA

2016 ◽  
Vol 15 (4) ◽  
pp. 783-790 ◽  
Author(s):  
Vinod Kumar Garg ◽  
Manbir Singh ◽  
Yogendra Prakash Gautam ◽  
Avinash Kumar
Keyword(s):  
Risk Assessment ◽  
Atomic Power Station ◽  
Spatial Mapping ◽  
Power Station

EXTREME RISK ASSESSMENT METHODOLOGY (ERAM) IN AVIATION SYSTEMS

2015 ◽  
Vol 14 (6) ◽  
pp. 1399-1408 ◽  
Author(s):  
Catalin Cioaca ◽  
Cristian-George Constantinescu ◽  
Mircea Boscoianu ◽  
Ramona Lile
Keyword(s):  
Risk Assessment ◽  
Assessment Methodology ◽  
Extreme Risk ◽  
Risk Assessment Methodology

The prospects of occupational risk management during reforms of regulatory legislation basis

2019 ◽  
pp. 39-44 ◽  
Author(s):  
Vadim B. Alekseev ◽  
Nina V. Zaitseva ◽  
Pavel Z. Shur
Keyword(s):  
Risk Assessment ◽  
Risk Management ◽  
Social Insurance ◽  
Well Being ◽  
Occupational Risk ◽  
Risk Level ◽  
Federal Law ◽  
Work Safety ◽  
Risk Levels ◽  
Legal Principles

Despite wide legislation basis of regulating relations in work safety and workers’ health, one third of workplaces demonstrate exceeded allowable normal levels of workers’ exposure to occupational hazards and present occupational risk for health disorders.In accordance to national legislation acts, evaluation should cover factors of occupational environment and working process, and occupational risk is understood in context of mandatory social insurance. This approach has been formed due to mostly compensatory trend in legal principles of work safety in Russia by now. Implementation of new preventive concept of work safety, based on idea of risk management for workers, necessitates development of legal acts that regulate requirements to evaluation of occupational risk and its reports with consideration of changes in Federal Law on 30 March 1999 №52 FZ “On sanitary epidemiologic well-being of population”.Those acts can include Sanitary Rules and Regulations “Evaluation of occupational risk for workers’ health”, that will contain main principles of risk assessment, requirements to risk assessment, including its characteristics which can serve as a basis of categorizing the risk levels with acceptability.To standardize requirements for informing a worker on the occupational risk, the expediency is specification of sanitary rules “Notifying a worker on occupational risk”. These rules should contain requirements: to a source of data on occupational risk level at workplace, to informational content and to ways of notifying the worker. Specification and implementation of the stated documents enable to fulfil legal requirements completely on work safety — that will provide preservation and increase of efficiency in using work resources.

An Overview of Risk-Based EEE Counterfeit Part Detection Based on SAE AS6171

2018 ◽  
Author(s):  
Michael H. Azarian
Keyword(s):  
Risk Assessment ◽  
Multiple Solutions ◽  
Test Equipment ◽  
Assessment Methodology ◽  
Test Plan ◽  
Specific Test ◽  
Risk Assessment Methodology

Abstract As counterfeiting techniques and processes grow in sophistication, the methods needed to detect these parts must keep pace. This has the unfortunate effect of raising the costs associated with managing this risk. In order to ensure that the resources devoted to counterfeit detection are commensurate with the potential effects and likelihood of counterfeit part usage in a particular application, a risk based methodology has been adopted for testing of electrical, electronic, and electromechanical (EEE) parts by the SAE AS6171 set of standards. This paper provides an overview of the risk assessment methodology employed within AS6171 to determine the testing that should be utilized to manage the risk associated with the use of a part. A scenario is constructed as a case study to illustrate how multiple solutions exist to address the risk for a particular situation, and the choice of any specific test plan can be made on the basis of practical considerations, such as cost, time, or the availability of particular test equipment.

Applying the risk principle to optimize accuracy and equity in correctional risk assessment: Results From a Simulation

2021 ◽  
pp. 0306624X2098652
Author(s):  
Grant Duwe
Keyword(s):  
Risk Assessment ◽  
Predictive Accuracy ◽  
Ethnic Disparities ◽  
Simulated Data ◽  
Risk Assessments ◽  
Risk Level ◽  
Risk Levels ◽  
Risk Principle ◽  
Changes In Risk ◽  
The Impact

As the use of risk assessments for correctional populations has grown, so has concern that these instruments exacerbate existing racial and ethnic disparities. While much of the attention arising from this concern has focused on how algorithms are designed, relatively little consideration has been given to how risk assessments are used. To this end, the present study tests whether application of the risk principle would help preserve predictive accuracy while, at the same time, mitigate disparities. Using a sample of 9,529 inmates released from Minnesota prisons who had been assessed multiple times during their confinement on a fully-automated risk assessment, this study relies on both actual and simulated data to examine the impact of program assignment decisions on changes in risk level from intake to release. The findings showed that while the risk principle was used in practice to some extent, the simulated results showed that greater adherence to the risk principle would increase reductions in risk levels and minimize the disparities observed at intake. The simulated data further revealed the most favorable outcomes would be achieved by not only applying the risk principle, but also by expanding program capacity for the higher-risk inmates in order to adequately reduce their risk.

scholarly journals Unmanned Aircraft Systems Risk Assessment Based on SORA for First Responders and Disaster Management

2021 ◽  
Vol 11 (12) ◽  
pp. 5364
Author(s):  
Paweł Janik ◽  
Maciej Zawistowski ◽  
Radosław Fellner ◽  
Grzegorz Zawistowski
Keyword(s):  
Risk Assessment ◽  
Disaster Management ◽  
Emergency Services ◽  
First Responders ◽  
Unmanned Aircraft ◽  
Unmanned Aircraft Systems ◽  
Aircraft Systems ◽  
The One ◽  
Risk Assessment Methodology ◽  
Assistance Project

Worldwide, there is a significant increase in the use of unmanned aerial vehicles (UAVs) by emergency services. They offer a lot of possibilities during rescue operations. Such a wide application for various purposes and environments causes many threats related to their use. To minimize the risks associated with conducting air operations with UAVs, the application of the SORA (Specific Operations Risk Assessment) methodology will be important. Due to its level of detail, it is a methodology adapted to civilian use. In this article, the authors’ team will try to develop guidelines and directions for adapting SORA to the requirements of the operational work of emergency services. Thus, the following article aims to present the most important risks related to conducting operations with the use of UAVs by first responders (FRs), and to show the sample risk analysis performed for this type of operation on the example of the ASSISTANCE project. The paper describes, on the one hand, possibilities offered by UAVs in crisis or disaster management and step-by-step Specific Operations Risk Assessment (SORA), and on the other hand, presents possible threats, consequences and methods of their mitigation during FR missions.

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