Generation resumes at India’s 1,500-MW Nathpa Jhakri

India project operator Satluj Jal Vidyut Nigam Ltd. (SJVN) reports it resumed generation June 19 as silt concentrations receded at the 1,500-MW Nathpa Jhakri hydroelectric project on the Satluj River in Himachal Pradesh State.

SJVN said it restarted four of the project’s six 250-MW turbine-generators. The other two units were to be restored as soon as silt levels receded further.

The plant was shut down June 11 when silt levels in the Satluj River exceeded the permissible limit of 4,000 parts per million.

SJVN said June 19 that all state power customers — Haryana, Himachal Pradesh, Jammu &Kashmir, Punjab, Rajasthan, Uttar Pradesh, and Uttarakhand — and the Union Territory of Chandigarh were receiving power through the Northern Grid.

Nathpa Jhakri has fought silt problems and resulting damage to generating equipment since the project was commissioned in 2003. (HNN 4/14/06)

SJVN awarded contracts totaling US$1.88 million for coating of the underwater parts of Nathpa Jhakri’s Francis turbines using a nano-technology-based powder. SJVN took bids for that work and for turbine-generator overhauls last year. (HNN 9/11/07)

One 40.44 million rupee (US$942,865) contract went to Industrial Processors &Metallizers (P) Ltd. to supply hard coating powder for robotic HPHVOF/HVOF hard coating of underwater parts of two turbines. A second contract of 40.41 million rupees (US$942,149) went to the same firm to coat parts of two additional turbines.

In May, SJVN said it received an insurance payment of 3.07 billion rupees (US$72.1 million) to cover losses due to 2005 flooding at Nathpa Jhakri. (HNN 5/30/08)

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