NTPC officials have said that "extremely high pressure" built up in the boiler furnace because of ash collecting in its outlet, producing a disaster.com/wFn0JQErQO— ANI UP (@ANINewsUP) November 3, 2017"There was no explosion in the boiler, it happened outside the boiler.Rathee clarified: "We only shut down a plant or a unit when we feel we cannot repair it during ongoing operations."The 1,550-megawatt plant, with six power generating units, supplies power to six states.Raebareli: The footage shot minutes after a boiler exploded at National Thermal Power Corporation&rotary piston vacuum pump39;s (NTPC) Unchahar plant in Raebareli, Uttar Pradesh shows flame, smoke billowing.

WATCH: Visuals taken minutes after boiler explosion at #NTPC plant in Raebareli's Unchahar on 1 Nov, the explosion has claimed 32 lives.Thick fumes filled the unit, making it the visibility poor."It will take nearly three to six months to make the unit functional again," Mr Singh told reporters.Around # 100 workers suffered burns and 20 of them are said to be in a very critical condition. Some survivors have spoken of a rattling in the unit and then intense heat "that could melt human flesh".Speaking to reporters, NTPC chairman Gurdeep Singh called the explosion "the rarest kind of incident".. We were aware of an ongoing problem and that's why the generation capacity of the plant was reduced on that day," admitted RS Rathee, the regional executive director of NTPC on Thursday evening.

Reports that a safety valve failed to work have not been confirmed so far. We have a central control room in Delhi and we were sending out all parameters there too.Questions have been raised about whether, having been aware of a problem, NTPC should have shut down the unit to prevent the deadly explosion. Soon after the explosion, flames leapt up and pressurised steam gushed out where a number of workers were standing. He said the people maintaining the unit were the most experienced. In the video, workers are heard shouting in fear. It is also being investigated whether alarm systems were working, to give enough time for workers to be evacuated.twitter. The explosion left 32 dead and injured several others. pic