Power plant in forest area
Srisailam hydroelectric power plant
On 20 August 2020, a major fire broke out in late night
hours, in an underground hydroelectric power plant in Srisailam in the state
of Telangana. The fire blaze killed 9 people, including 5 engineers and
15 employees who were inside the power plant escaped since the fire broke out. It
was suspected that the fire broke out due to a short circuit situated at
Srisailam's dam left bank. The fire had been brought under control by the
firefighters after several hours of struggle as of 21 August 2020 and the
rescue operations were delayed for hours due to the smoke. The bodies of nine
workers were recovered during the rescue operations.
The Srisailam Dam is constructed across the Krishna River in Kurnool district, Andhra Pradesh near Srisailam temple town and is the 2nd largest capacity working hydroelectric station in the country.
The dam
was constructed in a deep gorge in the Nallamala Hills in between Kurnool and Mahabubnagar
districts, 300 m (980 ft) above sea level. It is 512 m
(1,680 ft) long, 145 metres (476 ft) maximum height and has 12 radial crest gates. It has a reservoir of 616
square kilometres (238 sq mi). Project has an estimated live capacity
to hold 178.74 Tmcft at its full reservoir level of 885 feet
(270 m) MSL. The minimum draw down
level (MDDL) of the reservoir is at 705 feet (215 m) MSL from its river
sluice gates and corresponding dead storage is 3.42 Tmcft.[5] The left bank underground power station
houses 6 × 150 megawatts (200,000 hp)
reversible Francis-pump turbines for pumped-storage operation (each Turbine can pump 200 cumecs) and the right bank
semi under ground power station houses 7 × 110
megawatts (150,000 hp) Francis-turbine generators.
Tail pond
dam /weir located 14 km downstream of Srisailam dam is under advanced
stage of construction to hold the water released by the hydro turbines and
later pump back into the Srisailam reservoir by operating the turbines in pump
mode. The weir portion got breached in November 2015 unable to withstand
the normal water release from the hydro power stations. Tail pond weir was
completed during the year 2017 and pumping mode operation is being done even
the downstream Nagarjuna Sagar reservoir water
level is below 531.5 feet (162 m) MSL. The tail pond has nearly 1 tmcft
live storage capacity.
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Srisailam Dam |
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Power
Station |
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Operator(s) |
APGENCO |
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Turbines |
6 × 150 MW (200,000 hp)
reversible Francis-type (left bank) plant operator = APGENCO 7 × 110 MW
(150,000 hp) Francis type (right bank) |
|
Installed capacity |
1,670 MW (2,240,000 hp) |
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