Risk assessment of chemical industrial park storage tanks struck by lightning based on hybrid causal logic methodology

doi:10.16265/j.cnki.issn1003-3033.2024.09.0090

Abstract

Abstract:

Coastal chemical industrial parks have frequently experienced lightning strikes, which seriously threaten production safety. A risk assessment method based on HCL methodology was proposed to assess Natech (Natural-technological) accidents triggered by lightning strikes on storage tanks in these parks. Firstly, ESD and Fault Tree Analysis(FTA) were employed to qualitatively analyze the evolution paths of Natech accidents caused by lightning strikes on storage tanks, providing a visual foundation for blocking the accident transmission process. Secondly, BN were used to quantitatively calculate human error probabilities and assess the hybrid causal relationships of lightning-induced storage tank accidents. Finally, HCl methodology was applied to visually deconstruct the complexity and uncertainty of Natech accidents caused by lightning strikes on storage tanks. The research results indicate that decision-making error is the primary risk source in the human error model. Organizational atmosphere, psychological state, poor working environment and inadequate supervision are identified as the main factors leading to frequent human errors. The lack of effectiveness of lightning protection facilities is recognized as the trigger in the accident chain of lightning strikes on storage tanks. To reduce the severity of risk scenarios, emphasis needs to be placed on strengthening the control of full-surface fires and pool fires.

Key words: hybrid causal logic (HCL), chemical park, lightning strike on storage tank, risk assessment, Bayesian network (BN), event sequence diagram (ESD)

CLC Number:

X937

YANG Zhen, LIANG Junming, GUO Li, DONG Xiaobin. Risk assessment of chemical industrial park storage tanks struck by lightning based on hybrid causal logic methodology[J]. China Safety Science Journal, 2024, 34(9): 174-182.

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等级	语义值	模糊数
7	非常高	(0.9, 1.0, 1.0)
6	高	(0.7, 0.9, 1.0)
5	偏高	(0.5, 0.7, 0.9)
4	中等	(0.3, 0.5, 0.7)
3	偏低	(0.1, 0.3, 0.5)
2	低	(0, 0.1, 0.3)
1	非常低	(0, 0, 0.1)

编号	描述
PE₁	雷电击中储罐,防雷设施发挥作用
PE₂	一、二次密封区气体浓度达到爆炸极限,雷击引燃
PE₃	固定灭火系统有效,扑灭密封圈火灾
PE₄	固定灭火系统自启失效,人员介入
PE₅	储罐侧壁被雷电击穿导致原油泄漏
PE₆	储罐存储区出现热源,引燃泄漏原油

编号	描述
ES₁	防雷设施完好,无事故发生
ES₂	密封圈发生火灾后及时响应事故终止
ES₃	密封圈火灾烧穿密封圈,引燃原油液面
ES₄	泄漏原油漫延,遇明火发生池火灾
ES₅	原油泄漏

编号	模型层级	人为因素	描述
BN₁	组织影响	组织氛围	组织内部的工作氛围,企业文化等
BN₂	组织影响	组织过程缺陷	组织决策和规则管理存在缺陷
BN₃	不安全监督	操作计划恰当性	操作计划是否合适
BN₄		已知问题的纠正	管理存在未纠正的风险
BN₅		监管违规	监管人员无视制度授权不安全作业
BN₆	不安全行为的前提条件	心理状态	由于心理行为导致工作出错
BN₇		生理状态	能够对安全生产造成影响的生理状况
BN₈		能力局限	承担的任务超出员工能力
BN₉		工作环境	包括生产环境和厂区环境
BN₁₀	不安全行为	技术性失误	基础技能导致的失误
BN₁₁		决策性失误	在面对不确定性时决策出现差错
BN₁₂		感知性失误	个人感知与现实世界存在偏差
BN₁₃		习惯性违规	违反规章制度但被监管人员忽视
BN₁₄		偶然性违规	由于不确定偶然违反规章制度
BN₀	—	人因失误	人为因素导致的失误

编号	事件	排序	ϕ_i	P_i
BE₁	无排风系统	7^th	0.4	0.144
BE₂	排风系统故障	3^rd	0.8	0.289
BE₃	板式弹簧故障	5^th	0.6	0.217
BE₄	靴板故障	10^th	0.1	0.036
BE₅	一次密封防蒸发膜损坏	2^nd	0.9	0.325
BE₆	一次密封紧固连接件故障	8^th	0.3	0.108
BE₇	支撑板故障	6^th	0.5	0.181
BE₈	密封刮板损坏	4^th	0.7	0.253
BE₉	二次密封防蒸发膜损坏	1^st	1	0.361
BE₁₀	二次密封紧固连接件故障	9^th	0.2	0.072