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CSB Investigation
Report No. CSB-WACKER-2023
2023
Toxic release Toxic
Wacker Polysilicon 化学品释放
Wacker Polysilicon, Charleston, Tennessee
Related equipment → piping (piping)
0Fatalities
7Injuries
FailureMechanism code OTH
⌗Failure Mode · ISO 14224 Mapping
Damage mechanism (recorded in KB)
FailureOTH
ISO functional code (as recorded)
ISO 14224:2016 functional failure code
OTH · Other
ISO OTH — Other.
1What Happened
2020-11-13 维护作业中 7 名工人暴露于盐酸释放
2Root Cause
维护作业中隔离/泄压与气体检测不足
3Reliability Lessons (from investigation root cause)
- The 'Root Cause' above is the core lesson of this accident; not split further.
4Associated Failure Mechanisms (Keywords)
盐酸 释放 多晶硅 维护 中毒
About the Failure-Mode Code (click to expand)
The recorded code OTH is an ISO 14224:2016 functional failure code (describes what the equipment failed to do). The damage mechanism (how it failed) is shown in the Mapping block above. The two are distinct dimensions in ISO 14224.
5Evidence Source (transparent)
Authority：U.S. Chemical Safety and Hazard Investigation Board (CSB)
Official Report：www.csb.gov ↗
Data Verification：verified_url_csb_investigations_list_2026-08-07（终报 2023-06-15）
↗Related Failure Modes · Traceability
This accident is not yet linked to a specific FM traceability card.