Laal, Fereydoon
(Department of Occupational Health, School of Public Health, Shahid Beheshti University of Medical Sciences)
,
Pouyakian, Mostafa
(Department of Occupational Health Engineering, School of Public Health, Shahid Beheshti University of Medical Sciences)
,
Madvari, Rohollah F.
(Research Center for Environmental Determinants of Health (RCEDH), Kermanshah University of Medical Sciences)
,
Khoshakhlagh, Amir H.
(Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences)
,
Halvani, Gholam H.
(Department of Occupational Health, School of Public Health, Shahid Sadoughi University of Medical Sciences)
Background: Increasing the establishment of integrated management systems (IMSs) is done with the purpose of leaving traditional management methods and replacing them with modern management methods. Thus, the present study sought to analyze the events and investigate the impact of IMS on health and ...
Background: Increasing the establishment of integrated management systems (IMSs) is done with the purpose of leaving traditional management methods and replacing them with modern management methods. Thus, the present study sought to analyze the events and investigate the impact of IMS on health and safety performance indices in an Iranian combined cycle power plants. Methods: This case study was conducted in 2012 in all units of the Yazd Combined Cycle Power Plant on accident victims before and after the implementation of IMS. For data analysis and prediction of indices after the implementation of IMS, descriptive statistics and Kolmogorov-Smirnov test, Chi-square, linear regression, and Cubic tests were conducted using SPSS software. Results: The number of people employed in the power plant in an 8-year period (2004-2011) was 1,189, and 287 cases of work-related accidents were recorded. The highest accident frequency rate and accident severity rate were in 2004 (32.65) and 2008 (209), respectively. Safe T-score reached to below -3 during 2010-2011. In addition, given the regression results, the relation between all predictor variables with outcomes was significant (p < 0.05), except for the variable $X^1$ belonging to the accident severity rate index. Conclusion: The implementation of safety programs especially that of IMS and its annual audits has had a significant impact on reducing accident indices and improving safety within the study period. Accordingly, health and safety management systems are appropriate tools for reducing accident rate, and the use of regression models and accident indices is also a suitable way for monitoring safety performance.
Background: Increasing the establishment of integrated management systems (IMSs) is done with the purpose of leaving traditional management methods and replacing them with modern management methods. Thus, the present study sought to analyze the events and investigate the impact of IMS on health and safety performance indices in an Iranian combined cycle power plants. Methods: This case study was conducted in 2012 in all units of the Yazd Combined Cycle Power Plant on accident victims before and after the implementation of IMS. For data analysis and prediction of indices after the implementation of IMS, descriptive statistics and Kolmogorov-Smirnov test, Chi-square, linear regression, and Cubic tests were conducted using SPSS software. Results: The number of people employed in the power plant in an 8-year period (2004-2011) was 1,189, and 287 cases of work-related accidents were recorded. The highest accident frequency rate and accident severity rate were in 2004 (32.65) and 2008 (209), respectively. Safe T-score reached to below -3 during 2010-2011. In addition, given the regression results, the relation between all predictor variables with outcomes was significant (p < 0.05), except for the variable $X^1$ belonging to the accident severity rate index. Conclusion: The implementation of safety programs especially that of IMS and its annual audits has had a significant impact on reducing accident indices and improving safety within the study period. Accordingly, health and safety management systems are appropriate tools for reducing accident rate, and the use of regression models and accident indices is also a suitable way for monitoring safety performance.
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문제 정의
With regard to the review of the related literature, there is a dearth of research focusing on accidents in combined cycle power plants or at least their report is not available in the sources. Thus, the present study was conducted aiming at investigating the role of establishing an IMS on accident and safety performance indices in Yazd Combined Cycle Power Plant.
제안 방법
After data entry in SPSS version 19, descriptive statistics were used to describe some data, and KolmogoroveSmirnov test, Chisquare test, linear regression test, and Cubic tests were carried out for data analysis. In this research, as mentioned, the significance level was considered equal to 0.
After obtaining descriptive data and accident indices in different years, the results of Cubic or Grade 3 regression model were used to predict these indices in the years after the implementation of IMSs in this industry. It should be noted that predictive models in various industries may be different.
Sampling was done as total counting. The variables studied included working hours, lost workdays, and accident indices [accident frequency rate (AFR), accident severity rate (ASR), frequency-severity index (FSI), and Safe T-score (STS)].
대상 데이터
The water purification steps include introductory steps such as chlorination and reverse osmosis filtration and a deionization system. The plant consists of two Kraft units and S1 and S2 blocks. The S1 block consists of two gas units and one steam unit, which were manufactured by (Alstom, France) and (Siemens, Germany) companies respectively.
This research was a case study that was conducted in 2012 in two stages in all units of Yazd Combined Cycle Power Plant on accident victims (287 cases) in 2004 (before the implementation of IMS) and 2005e2011 (after the implementation of IMS). Yazd power plant is a combined cycle type that includes a number of gas and steam turbines.
이론/모형
AFR, ASR, FSI, and STS indices were calculated (Equations (1)- (4)) based on the Occupational Safety and Health Administration (OSHA) standard [22].
성능/효과
The other finding in this work was the prediction and estimation of safety performanceemonitoring indices in years after IMS implementation. After the investigation of different regression models, and given the significance of most of the coefficients in Cubic model, it was found that this model is the best one for predicting indices. Al-Ghamdi used logistic regression for predicting the effect of accident factors on accident severity and showed that logistic regression can be used as a suitable tool for improving safety in the future [34].
3% (17 cases). The results also showed that the main reasons for the occurrence of accidents in this 8-year period were unsafe actions (74%), unsafe conditions (16%), and not using personal protection means (10%). In addition, no significant relationship was observed between the reason of accident and working history of victim personnel (p < 0.
56) in 2011. The results indicated that the relative frequency of accident number before IMS implementation was about 33% and that after the implementation of IMS was about 22%.
The results of this study showed that safety situation in the years after implementation of IMSs (2005e2011) has improved compared with that in the year before the implementation of these systems (2004), and the greater the safety and the more detailed and orderly the management systems implemented are, the more dramatic the reduction in accident indices will be. The results of this study were compared with the findings of other studies.
후속연구
In this study, given that authors were not able to update information in the years after 2011, it is recommended that in future studies, for a better review, years after 2011 are also considered. It should be noted that during this period of time, factors such as the safety culture and the perceived risk of workers and personnel which may be affected by various factors such as media, management plans, and safety training which will be effective in improving the process should be considered in future studies.
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