Expert Witness Forensic Engineer Industrial Controls Automation New Orleans
Arthur Zatarain
Project Profile
Product Performance: Boiler Explosion on Power Plant
with Fail-in-place I/P Valve Positioner

Product Performance: evaluation for an electrical to pneumatic (I/P) digital valve positioner involved in a boiler furnace explosion due to insufficient combustion air. The fail-in-place positioner closed the inlet air damper following a lightning strike that rendered it inoperative. The forensic analysis of the Safety Instrumented System (SIS) involved failsafe and fault tolerant concepts for a damaged device. The positioner's damage was unrelated to the specific malfunction (loss of signal) that was addressed in its failsafe design.

Additional information on boiler/burner-related engagements can be found here. An article on failsafe and fault tolerant concepts can be viewed: here.

Copyright © 2024 Arthur Zatarain, all rights reserved. Some images are modified for confidentiality
or illustration clarity. This site should not be used as a technical or legal reference.