December 12, 2021
December 8, 2021
December 2, 2021
ANOTHER ANNIVERSARY OF BHOPAL.....National Process Safety Week on anniversary of Bhopal disaster December 3rd
Tonight is the 37th anniversary of the Bhopal gas disaster. We still do
not seem to learn from Bhopal. The same mistakes that occurred at Bhopal
keep recurring in various incidents around the World. Production
pressures along with cost cutting measures take a toll on process
safety. Just like the National safety week in march, I mooted the idea of
having a National Process Safety Week every year on the anniversary of
Bhopal for all chemical industries in India. During this week, the root
causes of the Bhopal disaster and process incidents in individual
organisations can be discussed with all employees including top
management. The root causes are again given below: They are still
relevant today:
2. Maintain all your layers of defense including asset integrity
3. Continually ensure that competency of personnel operating and maintaining plants are updated and current
4. Be prepared for the worst case scenario.
5. Understand the risks and measures to eliminate / reduce or control them
6. Learn from your past incidents. Those who do not learn are condemned to repeat the incidents.
7. Pay heed to your process safety management system audit reports
I am again attaching the link of some pictures of the victims of Bhopal, lest we forget..........
" Mothers didn't know their children had died, children didn't know their mothers had died, and men didn't know their whole families had died" - Ahmed Khan, Bhopal resident on the Bhopal disaster
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FATALITY DUE TO EXPLOSION IN NITRIC ACID TANK
A small steel process tank was filled with multiple metal baskets of tantalum capacitors cooked overnight in hot nitric acid. The hot nitric acid was used to remove some of the epoxy resin encapsulant from a tantalum anode. The nitric acid was drained each morning after the capacitors were cooked. The baskets of cooked capacitors were removed and rinsed in water. Mostly tantalum anodes remained. Employee #1 was killed and five other employees were seriously injured as a residue, containing picric acid, exploded, when Employee #1 placed a basket back into the drained tank, presumably to remove more encapsulant. Picric acid (trinitrophenol), and possibly other unstable nitrated compounds, formed in a nitration reaction between nitric acid and the bisphenol moiety of the epoxy resin. These nitrated compounds precipitated out of the nitric acid solution. Over time, as the spent nitric acid was drained from the tank after each batch, the precipitated nitrated compounds would accumulate on the inside surface of the tank. The spent nitric acid was typically used for multiple batches further concentrating unstable nitrated compounds on the tank's surface. Placement of the basket was likely the source of ignition. The explosion was estimated to be of a magnitude similar to an explosion involving more than 5 pounds of trinitrotoluene. The five seriously injured employees were treated for burns and bruises at a local hospital.
Source:OSHA.gov