Chlorine Poisoning Risk Management Based on ALOHA Simulation
- DOI
- 10.2991/978-94-6463-194-4_47How to use a DOI?
- Keywords
- ALOHA; liquid chlorine leaks; incident simulation; risk assessment; risk management; emergency strategies
- ABSTRACT
In this paper, based on the investigation report of a liquid chlorine leakage accident during filling operation, ALOHA software was used to simulate the indoor and outdoor chlorine gas diffusion in different accident scenarios, and the emergency evacuation area was divided according to the different toxicity levels. A four-step method for risk assessment was used to identify the occupational hazards of liquid chlorine leakage in the process of liquid chlorine filling. The dose-response model of acute chlorine poisoning was selected to characterize the individual risks of different exposure concentrations and exposure durations. Different measures were taken to manage the risks depending on whether they were tolerable. It was verified that according to the accident investigation report information, the chlorine gas diffusion simulated by ALOHA were basically consistent with the actual casualties of personnel in the two surrounding companies. The concentration of chlorine gas in buildings with low ventilation rate was much lower than that outdoors. The risk for individual exposed to 235mg/m3 chlorine for less than 10 minutes, to 136mg/m3 chlorine for less than 30 minutes, or to 96mg/m3 chlorine for less than 60 minutes is tolerable. Risk management strategies vary depending on whether the risk is tolerable. The diffusion simulation results based on ALOHA have guiding significance for selecting the locations of crowded places in plant area, chemical industrial park and surrounding enterprises. In case of accident leakage, people in the downwind area to which poison gas has spread should first evacuate to the vertical wind direction and then escape to the upwind direction. If there is no respiratory protection, they should close the doors and windows and wait for rescue.
- Copyright
- © 2023 The Author(s)
- Open Access
- Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.
Cite this article
TY - CONF AU - Minyan Li AU - Jianchao Wang AU - Qian Zhang AU - Deyin Huang PY - 2023 DA - 2023/07/21 TI - Chlorine Poisoning Risk Management Based on ALOHA Simulation BT - Proceedings of the 10th Annual Meeting of Risk Analysis Council of China Association for Disaster Prevention (RAC 2022) PB - Atlantis Press SP - 337 EP - 342 SN - 2352-5428 UR - https://doi.org/10.2991/978-94-6463-194-4_47 DO - 10.2991/978-94-6463-194-4_47 ID - Li2023 ER -