10 ms·

This is a great resource, and makes for great reading after finishing the NTSB reports. My personal take on the Nesvizh incident was that it was made to be 'too

This is a great resource, and makes for great reading after finishing the NTSB reports. My personal take on the Nesvizh incident was that it was made to be 'too inconvenient' to remove the key from the panel and the operator became complacent; simply hopping over the man trap via the motor housing was easier than the correct procedure. I'm not sure how the pressure plate was defeated, but what was the logic for a plate tripping while the key was in 'run'? I think in modern design a safety relay would have been tripped, and be unable to be reset until the source had returned home and the lid was locked. Edit: to expand on the pressure plate, maybe the logical fault was assuming the plate couldn't be accessed without the mantrap covered, requiring the key removed from panel.

deleted 6y ago
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YeGoblynQueenne 6y ago
I too wonder about the pressure plate and the IAEA report is uncertain of what exactly happened. The IAEA assumes he could not have circumvented the pressure plate and for my part I don't see why he would try to, at that point. From the report I didn't get an impression that stepping on the plate would have caused further delay, e.g. I didn't understand that there would be a new alarm etc. Rather it seems the only possible effect would be to lower the source if it was still in the "on" position, and I don't understand why he would have decided to override that particular safety feature. Clearly he had lots of experience sneaking in the maze past the safety systems so he must have known what he was doing and I don't see someone like that acting so foolishly for no good reason. The IAEA hypothesises some mechanical or electrical fault, or that the wrong buttons were pressed etc, but I guess we'll just never know. Perhaps even this guy who knew the facility like the back of his hand didn't know everything about it, after all. Thanks for the pointer to the NTSB reports. I didn't realise they're all there! Did you read the NTSB report on El Faro?

deleted 6y ago

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YeGoblynQueenne 6y ago

I too wonder about the pressure plate and the IAEA report is uncertain of what exactly happened. The IAEA assumes he could not have circumvented the pressure plate and for my part I don't see why he would try to, at that point. From the report I didn't get an impression that stepping on the plate would have caused further delay, e.g. I didn't understand that there would be a new alarm etc. Rather it seems the only possible effect would be to lower the source if it was still in the "on" position, and I don't understand why he would have decided to override that particular safety feature. Clearly he had lots of experience sneaking in the maze past the safety systems so he must have known what he was doing and I don't see someone like that acting so foolishly for no good reason. The IAEA hypothesises some mechanical or electrical fault, or that the wrong buttons were pressed etc, but I guess we'll just never know. Perhaps even this guy who knew the facility like the back of his hand didn't know everything about it, after all. Thanks for the pointer to the NTSB reports. I didn't realise they're all there! Did you read the NTSB report on El Faro?