Project title
Hatchobaru Geothermal Power Plant Project

Kyushu Electric Power Co.,Inc.

Project Description
Kyushu EPC is probably only one public utility in the world that carried out an integrated geothermal power development covering survey, and exploration of geothermal reservoir, drilling of production and reinjection wells, steam transmission system, power plant and operation and management.In addition to No.1 unit(55MW)commissioned in 1977, it constructed an additional geothermal power unit No.2 (55MW) in said manner in June 1990. The double flash transmission system was adopted owing to the hotwater dominated steam. Because the project is located inside the resort area and near the National Park, special attention was paid to landscape preservation and environmental measures.

Outline of The Services
West JEC rendered the engineering services for reservoir development, steam transmission, civil, architectual, electric and mechanical and environmental portions of this No.2 Unit as same as No.1 Unit.

The services provided are:
planning, supervision and evaluation of survey and exploration;
planning, site selection,drilling supervision and evaluation of exploratory, production and reinjection wells;
planning, design, tender specifications and supervision for gathering and steam transmission system;
planning, design, tender specifications of electric and mechanical equipment, powerhouse and appurtenant buildings and other civil structures;
assistance in commissioning; and
environmental assessment.

Further, because the operation of a geothermal power plant needs continuous reserch and study of the geothermal reservoir and drilling of supplementary production and reinjection wells to keep the rated output, West JEC continues to provide the consulting services for these activities.

Service Period
From February 1974 to June 1977 for No.1 Unit
From February 1987 to June 1990 for No.2 Unit

Project Outline
No.1 Unit No.2 Unit
production wells: 14 (Depth 759-2120m) 10 (Depth 1050-2200m)
Steam Transmission System: Two Phase Flow
(Length 1300m)
Two Phase Flow
(length 2800m)
Reinjection Wells 6 5
Reinjection Pipe Line 800m 800m
Generating System Double Flash System Double Flash System
Steam Turbine Generator 55MW 55MW
Steam Condition 7.3ata/1.7ata
Exhaust Pressure 0.1 ata 0.1 ata
Cooling Tower Mechanical Induced Mechanical Induced
Transmission Line 110kV x 1cct 110kV x 1cct

Overseas Turkey Kamchatka Philippines Guatemala Costa Rica

Japan Beppu Hatchobru Aso Kirishima Yamagawa
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