Citation

Li P, Wang H, Tian Y, Qiao D. China Saf. Sci. J. 2019; 29(1): 112-118.

Copyright

(Copyright © 2019, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2019.01.019

PMID

unavailable

Abstract

To accurately evaluate the PFS of SIS, a new PFS calculation model was built based on the traditional Markov model, after considering a proof testing strategy of the testing coverage rate and the system safety failure caused by the testing. The model was applied to a control system of liquid level for hot high pressure separator of hydrogenation process, and values of the PFS of the control system under different proof testing strategies were calculated. The results show that the model can solve the problem of over-idealization of the PFS calculation, and compared with the ideal testing strategy, the model is more accurate for the PFS calculation of on-site SIS and provides a certain safety margin for the SIS. © 2019 China Safety Science Journal. All rights reserved.

Language: zh