Impact of Deviations Handling on Outages

2016 ◽  
Author(s):  
Naoëlle Matahri
Keyword(s):  
Power Plants ◽  
Technical Support ◽  
Safety Measures ◽  
Design Change ◽  
Safety Requirements ◽  
Support Organization ◽  
Corrective Measures ◽  
Nuclear Safety Authority ◽  
The Impact ◽  
The Relationship

Based on the information provided by the operators, IRSN experts select and analyze different deviations presenting a possible generic nature which could affect the safety of power plants. Some of these deviations result in non-compliance (NC) with the safety requirements. To maintain an acceptable level of safety, an operator has to implement corrective measures for any situation of non-compliance with safety requirements. IRSN, the Technical Support Organization of the French Nuclear Authority, analyzes the different deviations to assess the impacts on the concerned NPPs safety. Based on the impact on safety, measures should be applied immediately or during the next outages, on a reactor or on several of them. The permanent corrective measures schedule is defined taking into account the “NC” safety impact. However, for some of the “NCs”, it can be difficult to define and implement swift permanent corrective measures, especially when the lack of compliance affects several similar units and requires a design change. This paper explains the French approach of deviations treatment and specifically the relationship between the Nuclear Safety Authority, the Technical Support Organization, IRSN and the Licensee, EDF during an outage.

scholarly journals Analysis of Factors Affecting Thermodynamic Efficiency in Generation III+ PWR Nuclear Power Plants.

2017 ◽  
Vol 4 ◽  
pp. 141-154
Author(s):  
Marcus Vitlin ◽  
Miroshan Naicker ◽  
Augustine Frederick Gardner
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Rankine Cycle ◽  
Steam Temperature ◽  
Factors Affecting ◽  
Electrical Efficiency ◽  
Balance Of Plant ◽  
The Impact ◽  
The Relationship

Generation III+ reactors are the latest generation of Nuclear Power Plants to enter the market. The key evolution in these reactors is the introduction of stringent safety standards. This is done through thorough incident scenario analysis and preparation, resulting in the addition of novel active and passive auxiliary safety systems, affecting the power consumption in the balance of plant. This paper analyses the parameters of PWR power plants of similar design, to determine the parameters for optimal efficiency, regarding gross and net electrical output, determining the impact the balance of plant has on this efficiency. While two of the three main factors affecting the Rankine cycle – boiler pressure and steam temperature – behaved as theoretically expected, there was a notable point of departure with the third parameter – condenser pressure. The relationship between steam temperature and gross electrical efficiency was linear across all reactors but the relation between the steam temperature and the net electrical efficiency ceased to be linear for secondary loop steam temperatures above 290°C. The relationship between boiler pressure and both gross and net electrical efficiency was linear, proving the Rankine cycle. A relationship was not observed between the condenser pressure and either the gross or net electrical efficiency

Employee engagement in Indian power companies: study of executives identifies four key drivers

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Keyword(s):  
Organizational Culture ◽  
Employee Engagement ◽  
Power Plants ◽  
Power Sector ◽  
Content Type ◽  
Specific Factors ◽  
Indian Power Sector ◽  
The Impact ◽  
The Relationship ◽  
Supervisor Trust

Purpose The purpose was to study how to create employee engagement in the Indian power sector. It also explored the antecedents of employee engagement. Design/methodology/approach Responses were gathered from executives in three companies working at power plants, distribution and transmission offices spread across five districts in the states of Odisha and West Bengal. Findings The research revealed how co-worker trust, supervisor trust and organizational trust all mediate the relationship between organizational culture and employee engagement. The study also compares engagement levels of employees at the three companies. Originality/value The authors say it is crucial to enhance employee engagement by identifying sector-specific factors. The results also help policymakers to appreciate the impact of organizational culture on employee engagement, and formulate appropriate policies.

scholarly journals The Impact of Truck Proportion on Traffic Safety Using Surrogate Safety Measures in China

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Shengdi Chen ◽  
Shiwen Zhang ◽  
Yingying Xing ◽  
Jian Lu ◽  
Yichuan Peng ◽  
...  
Keyword(s):  
Support Vector Machine ◽  
Traffic Flow ◽  
Traffic Safety ◽  
Variation Coefficient ◽  
Support Vector ◽  
Safety Measures ◽  
Speed Variation ◽  
Surrogate Safety Measures ◽  
The Impact ◽  
The Relationship

The purpose of this study is to investigate the impact of the truck proportion on surrogate safety measures to explore the relationship between truck proportion and traffic safety. The relationship between truck proportion and traffic flow parameters was analyzed by correlation and partial correlation analysis, and the value of the 85th percentile speed minus the 15th percentile speed (85%V–15%V) and the speed variation coefficient were selected as surrogate safety measures to explore the impact of truck proportion on traffic status. The k-means algorithm and the support vector machine were employed to evaluate traffic status on a freeway under different truck proportions in different periods. The major results are that the relationship between truck proportion and the value of 85%V–15%V and the speed variation coefficient is consistent in different aggregation periods. With increasing truck proportion, the value of 85%V–15%V, as well as the speed variation coefficient, increases initially and then decreases. In addition, the traffic flow status tends to be dangerous when the truck proportion ranges from 0.4 to 0.6 and when the value of 85%V–15%V and the speed variation coefficient are above 42 km/h and 0.223, respectively. While the truck proportion is from 0.1 to 0.3 and from 0.7 to 0.9, the traffic flow is relatively safe on the condition that the value of 85%V–15%V and the speed variation coefficient were under 42 km/h and 0.223, respectively. Therefore, the relationship between truck proportion and traffic safety could be well revealed by two surrogate safety measures, that is, the value of 85%V–15%V and the speed variation coefficient. In addition, the k-means algorithm and the support vector machine can well reveal the impact of truck proportion on traffic safety in different periods. The findings of this study indicate a need for decreasing the disturbance of mixed traffic and the impact of the truck proportion on traffic safety status.

Treatment of Alkaline Wastewater from Lignite-Fired Power Plants

1983 ◽  
Vol 15 (11) ◽  
pp. 155-162 ◽  
Author(s):  
Andrzej M Dziubek ◽  
Apolinary L Kowal
Keyword(s):  
Fly Ash ◽  
Chemical Composition ◽  
Power Plants ◽  
Treatment Process ◽  
Principal Component ◽  
Aeration Time ◽  
Time Required ◽  
Treatment Procedures ◽  
The Impact ◽  
The Relationship

Given are characteristics of, and treatment methods for, alkaline wastewaters from the hydrotransport of the fly ash from a lignite-fired power plant. The principal component of the fly ash is CaO. The impact of this type of waste on the aquatic environment is considered. Two treatment procedures are tested - CO2 recarbonation and aeration. The aeration of alkaline wastewaters yields good treatment efficiencies, bringing about the precipitation of calcium carbonate. Determined is the relationship between the duration of the treatment process and the chemical composition of the wastewater, as well as the aeration time required to achieve the desired decrease of the alkalinity and pH levels.

scholarly journals Impact of the physical environment of psychiatric wards on the use of seclusion

2013 ◽  
Vol 202 (2) ◽  
pp. 142-149 ◽  
Author(s):  
P. S. van der Schaaf ◽  
E. Dusseldorp ◽  
F. M. Keuning ◽  
W. A. Janssen ◽  
E. O. Noorthoorn
Keyword(s):  
Principal Components ◽  
Physical Environment ◽  
Design Features ◽  
Safety Measures ◽  
Private Space ◽  
Number Of Patients ◽  
Broad Variety ◽  
Components Analysis ◽  
The Impact ◽  
The Relationship

BackgroundThe physical environment is presumed to have an effect on aggression and also on the use of seclusion on psychiatric wards. Multicentre studies that include a broad variety of design features found on psychiatric wards and that control for patient, staff and general ward characteristics are scarce.AimsTo explore the effect of design features on the risk of being secluded, the number of seclusion incidents and the time in seclusion, for patients admitted to locked wards for intensive psychiatric care.MethodData on the building quality and safety of psychiatric as well as forensic wards (n = 199) were combined with data on the frequency and type of coercive measures per admission (n = 23 868 admissions of n = 14 834 patients) on these wards, over a 12-month period. We used non-linear principal components analysis (CATPCA) to reduce the observed design features into a smaller number of uncorrelated principal components. Two-level multilevel (logistic) regression analyses were used to explore the relationship with seclusion. Admission was the first level in the analyses and ward was the second level.ResultsOverall, 14 design features had a significant effect on the risk of being secluded during admission. The ‘presence of an outdoor space’, 'special safety measures' and a large ‘number of patients in the building’ increased the risk of being secluded. Design features such as more ‘total private space per patient’, a higher ‘level of comfort’ and greater ‘visibility on the ward’, decreased the risk of being secluded.ConclusionsA number of design features had an effect on the use of seclusion and restraint. The study highlighted the need for a greater focus on the impact of the physical environment on patients, as, along with other interventions, this can reduce the need for seclusion and restraint.

scholarly journals Assessment of the Shelter Structures to Be Dismantled after NSC Installation. Comparative Analysis of Dismantling Options

2019 ◽  
pp. 17-22
Author(s):  
Yu. Nemchynov ◽  
A. Bambura ◽  
I. Sazonova ◽  
K. Babik ◽  
V. Shcherbin ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Nuclear Power ◽  
Power Plants ◽  
Building Structures ◽  
Safety Measures ◽  
Safety Requirements ◽  
State Research Institute ◽  
Stability Bearing Capacity ◽  
Climatic Impacts ◽  
Two Stages

The surveys of the bearing and enclosing civil structures damaged after the Chornobyl Unit 4 accident that were conducted by the State Research Institute of Building Structures and Institute for Safety Problems of Nuclear Power Plants from 1995 to 2012 showed that a number of structures were in unstable condition. They include a group of structures that are especially dangerous in terms of the bearing capacity and are very likely to collapse. To ensure safe operation, immediate stabilization measures were developed and successfully implemented at the Shelter in 2005—2008. The justifying calculations show that the structures will comply with nuclear and radiation safety requirements (in terms of stability, bearing capacity etc.) over 15 years. The most unstable structures have to be dismantled by 2023, which is one of the conditions in the strategic plan for further transformation of the Shelter into a safe system. Two stages of safety measures have been defined for the unstable structures to be dismantled. The functional purpose of and climatic impacts on the bearing structures and, as a consequence, the Shelter lifetime are subject to change after stabilization of the unstable structures and installation of the New Safe Confinement (NSC) into the designed position. The paper analyzes scenarios for dismantling of unstable structures, stabilization measures and the probability of failure after implementation of the stabilization measures. A list of structures subject to early and deferred dismantling is provided. Shelter safety criteria and radiation protection objectives are considered.

Accent Policy and Accent Modification Enterprises as Potential Indicators of Intercultural Power Relations: A Call for an Updated Research Agenda

2013 ◽  
Vol 3 (1) ◽  
pp. 22-33 ◽  
Author(s):  
Brynne D. Ovalle ◽  
Rahul Chakraborty
Keyword(s):  
International Relations ◽  
Identity Construction ◽  
Social Theory ◽  
Power Relations ◽  
Linguistic Diversity ◽  
Cultural Organization ◽  
Using Data ◽  
The Individual ◽  
The Impact ◽  
The Relationship

This article has two purposes: (a) to examine the relationship between intercultural power relations and the widespread practice of accent discrimination and (b) to underscore the ramifications of accent discrimination both for the individual and for global society as a whole. First, authors review social theory regarding language and group identity construction, and then go on to integrate more current studies linking accent bias to sociocultural variables. Authors discuss three examples of intercultural accent discrimination in order to illustrate how this link manifests itself in the broader context of international relations (i.e., how accent discrimination is generated in situations of unequal power) and, using a review of current research, assess the consequences of accent discrimination for the individual. Finally, the article highlights the impact that linguistic discrimination is having on linguistic diversity globally, partially using data from the United Nations Educational, Scientific and Cultural Organization (UNESCO) and partially by offering a potential context for interpreting the emergence of practices that seek to reduce or modify speaker accents.

Business: Making Cents of Coding Systems: Billing for Professional Services

2010 ◽  
Vol 20 (1) ◽  
pp. 3-8
Author(s):  
Dee Adams Nikjeh
Keyword(s):  
Professional Services ◽  
Speech Language Pathology ◽  
Coding Systems ◽  
Language Pathology ◽  
Program Funding ◽  
Fee Schedule ◽  
Procedure Codes ◽  
Relationship Of ◽  
The Impact ◽  
The Relationship

Abstract Administrators and supervisors face daily challenges over issues such as program funding, service fees, correct coding procedures, and the ever-changing healthcare regulations. Receiving equitable reimbursement for speech-language pathology and audiology services necessitates an understanding of federal coding and reimbursement systems. This tutorial provides information pertaining to two major healthcare coding systems and explains the relationship of these systems to clinical documentation, the Medicare Physician Fee Schedule and equitable reimbursement. An explanation of coding edits and coding modifiers is provided for use in those occasional atypical situations when the standard use of procedural coding may not be appropriate. Also included in this tutorial is a brief discussion of the impact that the Medicare Improvements for Patients and Providers Act of 2008 (HR 6331 Medicare Improvements for Patients and Providers Act [MIPPA], 2008) has had on the valuation of speech-language pathology procedure codes.

The Need to Belong and the Relationship Between Loneliness and Health

2014 ◽  
Vol 22 (4) ◽  
pp. 194-201 ◽  
Author(s):  
Freda-Marie Hartung ◽  
Britta Renner
Keyword(s):  
Individual Differences ◽  
Social Isolation ◽  
Social Situation ◽  
First Year ◽  
Health State ◽  
Need To Belong ◽  
First Year University ◽  
Perceived Social Isolation ◽  
The Impact ◽  
The Relationship

Humans are social animals; consequently, a lack of social ties affects individuals’ health negatively. However, the desire to belong differs between individuals, raising the question of whether individual differences in the need to belong moderate the impact of perceived social isolation on health. In the present study, 77 first-year university students rated their loneliness and health every 6 weeks for 18 weeks. Individual differences in the need to belong were found to moderate the relationship between loneliness and current health state. Specifically, lonely students with a high need to belong reported more days of illness than those with a low need to belong. In contrast, the strength of the need to belong had no effect on students who did not feel lonely. Thus, people who have a strong need to belong appear to suffer from loneliness and become ill more often, whereas people with a weak need to belong appear to stand loneliness better and are comparatively healthy. The study implies that social isolation does not impact all individuals identically; instead, the fit between the social situation and an individual’s need appears to be crucial for an individual’s functioning.

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