Last year in May, 10 bolts were found sheared and were replaced by new ones. Again, during annual maintenance in November last year six bolts, which were replaced in previous maintenance, were found sheared and again replaced.
According to sources, bolts made of normal mild steel were manufactured at Nangal workshop and used last year which have again led to shearing of bolts. The original bolts were made of carbon steel. This time suitable quality of bolts of carbon steel as were recommended by Hitachi shall be manufactured and used to avoid future breakdowns, said a senior official.
The commissioning schedules of Bhakra Left Bank Power House Units 2 and 5 have repeatedly slipped .The units are under shutdown for Renovation, Modernization(R&M) and Upgrading and the works were supposed to be completed in 12 months from date of start of work.
The R&M of Bhakra left bank units has been delayed by more than two years and units may not be commissioned within three years against stipulated period of one year. These units are also likely to be commissioned in next three months.
R&M works of unit 4, 3 and 1 will be taken in a phased manner after the completion of ongoing work of unit 2 and 5.
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