Abstract
Chemical warehouses are one of the high-risk areas in the process industries due to the high diversity and quantity of stored chemicals. Risk assessment is a useful tool for developing appropriate strategies to prevent and control the risks. In this study, computational fluid dynamics (CFD) and Bayesian network (BN) approaches were proposed for dynamic risk assessment. Initially, bow tie (BT) method was used for identifying basic events and modeling the consequences. In order to determine the consequences intensity (heat flux and CO and CO2 concentration), fire dynamics simulator (FDS) and solid flame model were used. A total of 21 causes or failures were identified in the chemical spills, 13 cases of which were related to basic events. Out of the identified causes, the forklift and drum strike basic event had the most contribution of the chemical spills in the warehouse, and the probability of the major spill event scenario 1.25495E−11 was estimated by Bayesian networks. The estimated risk by CFD in combination with BN, after updating, is unacceptable compared to the UK risk criterion. Bayesian networks and CFD approach for dynamic assessment of environmental impact risk in chemical warehouses provide the capability to quantitatively and dynamically assess the consequences of chemical spills by modeling its cause and effect in the warehouse. Based on the results of this method, effective preventive measures can be taken to control the consequences of chemical spills in the warehouse.
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Abbreviations
- CFD:
-
Computational fluid dynamics
- BN:
-
Bayesian network
- BT:
-
Bow tie
- FDS:
-
Fire dynamics simulator
- LNG:
-
Liquefied natural gas
- EFMEA:
-
Environmental failure mode and effects analysis
- FMEA:
-
Failure mode and effects analysis
- DGA:
-
Diglycolamine
- CoA:
-
Center of area
- CFP:
-
Crisp failure probability
- OREDA:
-
Odisha renewable energy development agency
- ExLOPA:
-
Explosion layer of protection analysis
- CFP:
-
Failure probability
- FTA:
-
Fault tree analysis
- ETA:
-
Event tree analysis
- FST:
-
Fuzzy set theory
- BE:
-
Basic event
- NIST:
-
National institute of standards and technology
- BEVI:
-
Besluit externe veiligheid inrichtingen
- RSME:
-
Root-mean-square error
- IDLH:
-
Immediately dangerous to life or health
- FDS:
-
Fire dynamics simulator
- CCPS:
-
Center for chemical process safety
- Z i :
-
Fuzzy failure possibility for BEi
- W j :
-
Weight of experts i
- f ij :
-
Fuzzy number of BEi obtained from expert j
- m:
-
Total number of events
- n:
-
Total number of experts
- FP:
-
Fuzzy probability
- CFP:
-
Fuzzy possibility
- K:
-
Constant value
- FPS:
-
Fuzzy possibility scores of fuzzy number
- X * :
-
Defuzzified output
- x :
-
Output variable
- \( \mu_{{\tilde{A}}} (x) \) :
-
Membership function
- C p :
-
Specific heat at constant pressure (kJ.kg−1 K−1)
- χr :
-
Radiative fraction
- t :
-
Time (s)
- q :
-
Thermal radiation (Kw/m2)
- P :
-
Probability of death
- u :
-
Integration variable
- N :
-
Number of deaths (persons/m2)
- D p :
-
Population distribution (persons/m2)
- A:
-
Compacted area
- Y :
-
Probit function
- D * :
-
Characteristic fire diameter (m)
- ρ :
-
Density (kg/m3)
- T :
-
Temperature (K)
- g :
-
Gravitational acceleration (m/s2)
- T a :
-
Ambient temperature (K)
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Acknowledgement
This study is a part of a Ph.D. dissertation which was funded by Shahid Beheshti University of Medical Sciences, Tehran. Iran. Thanks are owed to Shahid Beheshti University of Medical Sciences for their financial and technical support. The study proposal was approved by the ethics committee prior to its execution (Project No: 9497/20).
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Jafari, M.J., Pouyakian, M., khanteymoori, A. et al. Development of a framework for dynamic risk assessment of environmental impacts in chemicals warehouse using CFD-BN. Int. J. Environ. Sci. Technol. 18, 3189–3204 (2021). https://doi.org/10.1007/s13762-020-03040-0
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DOI: https://doi.org/10.1007/s13762-020-03040-0