Safety Moment #94: Fault Tree Analysis
This post has moved to https://netzero2050.substack.com/p/fault-tree-analysishttps://netzero2050.substack.com/p/fault-tree-analysis.
Copyright © Ian Sutton. 2023. All Rights Reserved.
This post has moved to https://netzero2050.substack.com/p/fault-tree-analysishttps://netzero2050.substack.com/p/fault-tree-analysis.
Copyright © Ian Sutton. 2023. All Rights Reserved.
An updated version of this page is available here.
Copyright © Ian Sutton. 2024. All Rights Reserved.
One of the founders of the process safety discipline was Trevor Kletz (1922-2013). Probably his best eulogy is also the simplest, "He saved lives."
As we reflect on Trevor's contributions it is clear that one of his greatest gifts was that of telling stories. He wrote extensively on technical topics such as hazards analysis and inherent safety, but he is probably best remembered for his story-telling books such as Learning from Accidents and What Went Wrong? Human beings learn best from stories and Trevor knew it.
The purpose of a Prestartup / Operational Readiness Review (PSR) is to ensure that initial start-ups, or start-ups following major project work, proceed safely and smoothly. In particular, the PSR will check to make sure that all project activities are complete and that the system is ready for safe operation. It is a tool that the operations and maintenance departments use to make ensure that they have received what they expected to receive from the project team, and that no corners were cut, particularly with regard to safety.
A Confined Space is a space which is large enough for a worker to enter but has limited openings for entry and exit and is not intended for continuous employee occupancy. Entry is considered to have occurred as soon as any part of the entrant's body breaks the plane of an opening into the space. Therefore it is not permissible, for example, to take a quick breath and to put one's head into a vessel for a quick look without having an entry permit. Wherever possible work should be organized such that it can be carried out without anyone needing to enter the confined space.
This Safety Moment is one in a series to do with the process safety profession.
NORM (Naturally Occurring Radioactive Material) is found in many naturally-occurring materials, including some oil and gas deposits.
Sources of NORM include:
Reproduced with permission
Further thoughts on this topic are provided at the post The One-Legged Stool.
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Early in the 20th century a factory in the town of Pitsea in England manufactured the explosives using nitro-glycerine.
Many organizations and companies have committed to ‘Net Zero’ goals, i.e., they aim to fundamentally restructure their activities such that they are not adding greenhouse gases to the atmosphere by a specific date — the year 2050 is often chosen. The term ‘Net Zero by 2050’ has become particularly prominent because it is so catchy.
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