1.3.6.1.4.1.61513TIL CS energy made a video on Callide C4 generator explosion - aka what happens when a coal generator becomes an unplanned motor.
Its pretty good https://www.youtube.com/watch?v=vbLvjFohK9g
YouTube
I read the reports awhile back because I wasn't aware there was a video. The reports are public and cover a few other aspects such as:
- the old battery charger vs the new battery charger requirements
- why the battery charger was replaced during operation
- why the switching operation had to be performed that
- org issues causing acs not to be fixed
- previous identified issues with process not being addresses
https://www.csenergy.com.au/news/release-of-draft-brady-heywood-reports-into-callide-c4-incident
Now why was i looking at callide stuff again? Oh right callide c4 tripped the other night and i was curious as to why. Noticed because frequency sagged a lot
_GreyWolf
Daniel Carosone@xssfox yeah these ones say all the organisational things the internal CSE report does not
D Ingram@xssfox The reports skimmed over the numpty decision to have both DC sources from the same bus. If the default position for the change over switch was different it would all have been avoided. Making sure the chargers were holding load by monitoring current would help too.
Strange seeing something I helped commission destroyed. The Toshiba generators are nice machines.
Alternative title: How to win at Beyblades
Graham Sutherland / Polynomial@xssfox USCSB but not USCSB? I'm here for it
Mathias, a FWAlfdog ❄️🐺 
@gsuberland @xssfox It doesn't have the production value of USCSB's productions (with its contractor), but still seems solid.
Adam Kent@xssfox Did you see the timelapse of the rebuild too, fun fun. https://youtu.be/8HkQGU2Nu0M
Installation of new turbine and generator stator at Callide Unit C4 in 2023
vertikar
Malcolm Herbert@xssfox ... fsck me, that's terrifying ...
Kit Bashir@xssfox If only they had run a test to assure that the system would shut down safely in the event of a power failure!
Attractive Nuisance@xssfox I have Many Questions after watching that video. Not least why they didn't flip the connector back after disconnection caused the power outage.
It seems from the video like that would have been a safe back-out step in the event of unexpected power failure, and would have restored the emergency pumps at least.
But I guess the video is to explain what happened, not what could have happened.
@diffrentcolours from memory of reading the report the switching people left the room and eventually evacuated. This is because they were unsure of what happened, what the state was and what was safe.
I agree with their decision as making panic switching decisions can often lead to catastrophic results and the system is meant to fail safe
@xssfox Oh yes, I don't think they should have done it as a panic decision. I was thinking it might have been a pre-considered, documented contingency backout step.
@diffrentcolours dug up the report again and yeah they heard bangs so evacuated
fernacen
Noel KellyThe Australian conservative opposition want to build nuclear reactors at the site.
Laughable I know, but if it became policy it would destabilise renewables investment, delaying coal and gas phase out. Delaying renewables investment is the name of the game.
Eskibrew
vxo
Aurynn Shaw@xssfox wow this is fascinating
Lewis@xssfox yes it is! I also feel like I'm listening to a chapter from "Normal Accidents", because of course there were unexpected interactions between *safety systems* which led to it blowing up.
@lewis when i read the section on the arc detection / voltage collapse i was absolutely shocked how unlucky they got
DeltaWye
Andrew Bartlett@xssfox That was probably the trigger for the Almighty Algorithm suggesting this amazing cascade failure:
Andrew