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CSB Investigation
Report No. CSB-TSUSA-MOLTENSALT-2024
2024
Safety Safety
TS USA 熔盐/氮化工艺化学喷涌
TS USA (liquid nitriding facility), Chattanooga, Tennessee
Related equipment → Reactor (reactor)Related equipment → 压力容器/缓冲罐/分液罐/闪蒸罐 (Pressure Vessel) (压力容器/缓冲罐/分液罐/闪蒸罐 (Pressure Vessel))
1Fatalities
0Injuries
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
液体氮化工艺设备化学释放/喷涌致 1 名工人死亡；工艺热冲击与容器完整性管理不足
2Root Cause
高温/腐蚀性工艺介质设备完整性（MI）与作业许可缺陷；热冲击与材料退化监测不足
3Reliability Lessons (from investigation root cause)
- The 'Root Cause' above is the core lesson of this accident; not split further.
4Associated Failure Mechanisms (Keywords)
熔盐 氮化 化学释放 反应器 热冲击 容器破裂
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：url_verified_csb_investigations_list_2026-08-07（事故 2024-05-30 / 终报 2025-06-03）
↗Related Failure Modes · Traceability