The revision note said no change of intent, and nobody asked for a process safety review.
Learning from incidents on one drain job: two near misses and a lost step
A planner must drain the boot of a coker blowdown drum before its level bridle valves are changed. That morning, screen by screen.
demoThe refinery, its staff, its reports and its counts on these screens are sample data.
- 01Planning, first thing
Two near misses on the same drum land in the inner ring
Job plannerShe types the job the way she would say it to a colleague. The agents show what they took from her words as chips: the drum, draining, hydrogen sulfide, hot liquid, a plugged line cleared under pressure. She can strike any chip out. The two closest reports are both on this drum, and the later one raised no action at all, so those two come first.
- 02Reading the first report
The first near miss on this drum added a stop step to Rev 6
Job plannerThe report reads as a short story. The drain stopped, the operator rodded through the bleed at 9 psig and 231°F, and hot sour water sprayed across the platform; his monitor peaked at 22 ppm. Each sentence carries a number that opens its source. One opens Rev 6 of the procedure with step 4.7 lit: if flow stops, close the drain and stop.
- 03Still reading
A template move in Rev 9 shortened the steps and the stop fell out
Job plannerThe tracker says the action closed. The revision record says Rev 9 moved the procedure to a new template, shortened its steps and changed nothing in intent. Nobody requested a process safety review, because a template move was not treated as a change. For the planner this is the line that matters: the procedure she would hand out has no stop step.
- 04The second report
The repeat blames the operator for a step that Rev 9 no longer had
Job plannerSame drum, same plug. This time the line let go into a face shield and the monitor peaked at 31 ppm. The report says the operator did not follow the procedure, closed in nine days with a reminder at the toolbox talk, and does not mention the first near miss. The screen marks it plainly: no action raised.
- 05Changing the plan
A hold point after line 4, in wording taken from the revision that had it
Job plannerThe plan has six lines. She adds a hold point after line 4, where the drain is opened: if flow stops, close the drain, tell the shift supervisor and stop, since a plug can hide pressure behind it. Beside the plan sit the two reports and both undone actions on this drum: the lost stop step, and a steam-out wait missing from the drain tag.
- 06Sent for signature
Signing stays off until he has opened three items
Shift supervisorThe planner cannot sign her own plan, and the screen tells her so. On the supervisor’s side the plan waits, the permit is blocked, and signing stays off until he has opened each report and the hold point, with three still to open. When a plan has changed, he reads why before his name goes on it.
- 07Signed
Both reports opened, and this version is the one on the permit
Shift supervisorHe opens the first report, then the second, then the hold point. Only then does the plan take his signature, and the sign-off now says the permit writer can use this version. Any change after this point voids the signature. Out at the drum, the hold point carries its own button to clear it at the job.
- 08Later that morning
373 closed actions confirmed undone, and 1,247 nobody can call yet
Process safety engineerA hold point protects one job. The engineer looks across the estate: 33,118 of the 39,760 closed actions can be shown still in place, 373 are confirmed undone and 1,247 are flagged and still being checked. Another 5,022 cannot be traced to any record. The undone list opens with the stop step on this drum.
- 09The fix to the procedure
Rev 10 carries the stop again, read back from the issued text
HSE leadThe engineer wrote the new wording and sent it on; she cannot sign her own fix. The HSE lead opened the Rev 10 wording, then signed. A fix closes only when the action checker finds the step in the issued document, and here it does, as step 3.6. The other fixes on the list stay open, one of them late and escalated.
- 10Back on the map
The first near miss now reads still in place, and the repeat stays on it
Job plannerOn the map the same report now reads still in place, with the step quoted from Rev 10, and the chip for the later repeat stays beside it. The next planner who asks about this drum starts from a procedure with the stop in it, and still reads both stories before touching the plan.