The preliminary investigation shows that high pressure steam piping breaking during the commissioning of the thermoelectric project of Dangyang Madian Gangue Power Generation Co., Ltd. under construction, which resulted in steam leakage, is the main reason for the accident.
根据初步调查，事故原因是当阳市马店矸石发电有限责任公司热电项目在建调试过程中，因高压蒸汽管道破裂，蒸汽外泄所致。