ADB is helping Tajikistan rehabilitate the Nurek Hydroelectric Power Plant, which produces over 70% of the country's electricity. The project will replace outdated equipment and build a new 500 kilovolt Nurek switchyard within the Nurek Hydroelectric Power Plant complex.
|Project Name||Nurek 500 kV Switchyard Reconstruction Project|
|Project Type / Modality of Assistance||Grant
|Source of Funding / Amount||
|Strategic Agendas||Inclusive economic growth
|Drivers of Change||Governance and capacity development
|Sector / Subsector||
Energy - Electricity transmission and distribution
|Gender Equity and Mainstreaming||No gender elements|
|Description||The Nurek 500 kV Switchyard Reconstruction Project (the Project) will build a new Nurek 500 kV switchyard on a new site within the Nurek Hydroelectric Power Plant (HEPP) complex to replace the existing Nurek 500kV switchyard. The existing 500 kV equipment will be dismantled and used mostly as spare parts for other 500 kV substations.|
|Project Rationale and Linkage to Country/Regional Strategy||
Nurek HEPP, incorporating 220 kV and 500 kV switchyards, produces over 70% of Tajikistan's electricity and performs a frequency regulation role for the Central Asian power system, which includes the electricity systems of Kazakhstan, Kyrgyz Republic, Turkmenistan, and Uzbekistan.
The existing switchyards were built more than 30 years ago with Soviet technology and replacement parts are no longer available. They are therefore in need of complete replacement. Severe subsidence in areas of the switchyards has been occurring for many years, requiring major ongoing remedial measures. This is due to an extensive salt dome in the vicinity of the switchyards that destabilizes the ground conditions during snow melt and rain. There are risks for both switchyards that a catastrophic event may occur at any time, thereby destroying major parts of the switchgear. Ground stabilization measures are considered impractical.
The Government of Tajikistan considers the reconstruction of the switchyards to be critical due to the deteriorating equipment and unstable geological site conditions that could result in the potential loss of major output from the Nurek HEPP for lengthy periods. A 2006 feasibility study recommended that the equipment in both switchyards be retired, with new switchyards to be built on secure ground. The study also recommended that the least-cost option to utilize a portion of the land would be where the existing 220 kV switchyard is currently located for both new switchyards. The ground conditions of the proposed new site have been verified as satisfactory by geological investigation.
Gas-insulated switchgear technology, which uses approximately 10% of the area required by conventional air-insulated switchgear technology, is required due to the restricted area of the proposed new site.
|Impact||Reliable electricity supply in Tajikistan.|
|Description of Outcome||Reliable evacuation of Nurek hydroelectric power plant (HEPP) electricity to the grid.|
|Progress Toward Outcome||The project outcome is achieved as envisaged. The connections to the national power supply grid are accomplished. That is, the risk of natural disasters disabling the switchyard was mitigated and the electricity flow from Nurek HEPP was stabilized.|
|Description of Project Outputs||New 500 kV switchyard built at a secure location and connected to the grid and Nurek HEPP.|
|Status of Implementation Progress (Outputs, Activities, and Issues)||
The newly built 500 kV GIS including all auxiliary systems was commissioned on 30 October 2015. The connections to the national power supply grid are accomplished; thus the risk of natural disasters disabling the switchyard was mitigated and the electricity flow from Nurek HEPP was stabilized.
The additional scopes: (i) installation of 3 new OHL towers at existing 500kV switchyard; and (ii) procurement of additional spare parts are successfully completed. Completion of autotransformer`s delivery, installation and commissioning are expected in Q2 2017.
|Summary of Environmental and Social Aspects|
|Environmental Aspects||The initial environmental examination (IEE) confirmed that only minor impacts are expected during the construction phase of the Project. All construction works of the new switchyard and dismantling of the old switchyard takes place within the fenced compound of the Nurek Hydroelectric Power Plant (HEPP), which has been in operation for over 30 years. The construction works involve disposal of spoil. The spoil bank is located just outside the Nurek HEPP compound in an area which was once the borrow area for excavating materials for the construction of the dam body. Barki Tajik has been granted the land-use rights, and the area has been used until very recently as a spoil bank to deposit dredged materials from downstream of the Nurek HEPP. Most of the parts and materials generated from dismantling of the existing switchyard will be used as spares in other 500 kV substations, and old metals (steel, copper, and aluminum) will be sold to local recycling companies.|
|Involuntary Resettlement||No involuntary resettlement involved in Project.|
|Indigenous Peoples||The project is not expected to have impacts on indigenous peoples.|
|Stakeholder Communication, Participation, and Consultation|
|During Project Design||No negative social impacts are envisaged, but a public consultation was held in accordance with ADB's Environment Policy (2002). Public consultation was held on 11 September 2008 at the Nurek City Administration Office and attended by approximately 70 participants. No concerns were raised over the Project.|
|During Project Implementation||Information sharing is envisaged during the project implementation and monitoring.|
|Consulting Services||One consulting firm will be recruited as the implementation consultant. The consultant will be selected and engaged in accordance with ADB's Guidelines on the Use of Consultants.|
|Procurement||One turnkey contract for the entire Project will be procured by Barki Tajik using international competitive bidding in accordance with ADB's Procurement Guidelines.|
|Responsible ADB Officer||Chansavat, Bouadokpheng|
|Responsible ADB Department||Central and West Asia Department|
|Responsible ADB Division||Tajikistan Resident Mission|
Barki Tojik Joint Stock Holding Company
Mr. Sanat Rahimov
64 I. Somoni Str. 734026, Dushanbe, Tajikistan
|Concept Clearance||28 Jul 2008|
|Fact Finding||18 Aug 2008 to 29 Aug 2008|
|MRM||25 Sep 2008|
|Approval||17 Nov 2008|
|Last Review Mission||-|
|PDS Creation Date||26 Aug 2008|
|Last PDS Update||15 Mar 2017|
|Approval||Signing Date||Effectivity Date||Closing|
|17 Nov 2008||26 Dec 2008||20 Mar 2009||31 Jul 2014||31 Dec 2016||03 Apr 2017|
|Financing Plan||Grant Utilization|
|Total (Amount in US$ million)||Date||ADB||Others||Net Percentage|
|Project Cost||66.90||Cumulative Contract Awards|
|ADB||54.77||17 Nov 2008||54.76||0.00||100%|
|Cofinancing||0.00||17 Nov 2008||54.76||0.00||100%|
|Status of Covenants|
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Tajikistan President Inaugurates ADB-Supported Energy FacilityPresident Emomali Rahmon today inaugurated the new 500-kilovolt switchyard built with the support of the Asian Development Bank (ADB) at the Nurek hydropower plant.
Journalists Visit ADB Energy Project in TajikistanA group of journalists from Dushanbe visited the Nurek 500 kilovolt (kV) switchyard reconstruction project funded by the Asian Development Bank (ADB) in Tajikistan.
Tajikistan Hydropower: Strengthening the Power SupplyThe Soviet-era Nurek hydropower plant supplies most of Tajikistan’s electrical power, but its technology is antiquated and the land its switchyard is built on is sinking, requiring an ADB intervention of funds and expertise.
ADB Helps Put Tajikistan's Switchyards on Solid FootingADB support helps save a sinking switchyard, and keeps energy flowing to Tajikistan's emerging businesses. Dushanbe, Tajikistan - In ADB technical reports the geological term subsidence is used to describe what's happening to the switchyards at the Nurek Hydroelectric Station outside Tajikistan's capital, Dushanbe. To put it more simply, the two massive switchyards that transmit over 70% of the country's electricity are sinking.
Upgrading and Stabilizing Power Supply in TajikistanADB upgrades the obsolete Nurek hydroelectric plant which supplies electricity to the majority of the country's population