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Environmental Accounting

Environmental conservation effects

CO2 emission factor and other environmental conservation effects have been calculated.
The long-term shutdown of the Tomari Nuclear Power Station has forced us to utilize alternative thermal power generation to make up for supply shortages, so CO2, SOX and NOX emissions have remained high. We expect to reduce these emissions in the future with measures such as stably operating our LNG-fired thermal power station (Ishikariwan Shinko Power Station), which has superior environmental characteristics.

Classification Description FY2019 FY2020
Global warming countermeasures CO2 emission factor (kg-CO2/kWh) unadjusted emission factor is given in parentheses. 0.656
SF6 recovery rate (%) During equipment inspection 99 99
During equipment removal 99 99
Local environmental conservation SOX emissions intensity (g/kWh) 0.83 0.66
NOX emission intensity (g/kWh) 0.61 0.52
Formation of recycling-based society Amount recycled (10,000-ton units) 105.7 84.3
Final disposal amount (10,000-ton units) 4.3 2.5
Environmental management*1 Landscape preservation measures
Distribution line length (km)*2
600 642
Greening area (1,000 m2 units) 14,781 14,925
  1. *1Values for environmental management items are cumulative.
  2. *2Length of power distribution line along which maintenance has been performed or which has been placed underground so as to preserve the scenic landscape.

Environmental conservation costs and economic effects

Plant operations and other factors lead to fluctuations in environmental conservation costs. In FY2020, both of Environmental conservation cost and Economic effect increased on account of the operation of high-efficiency LNG-fired Ishikariwan Shinko Power Station unit1. Consequently, Cost effectiveness did not change compared with previous year. We will continue to work hard to enhance managerial efficiency as we engage in highly cost-effective environmental conservation activities.

Classification FY2019 FY2020
A. Environmental conservation cost (expense) ¥18.11 billion ¥27.82 billion
B. Economic effect ¥11.51 billion ¥17.74 billion
Cost effectiveness (B / A) 0.63 0.63

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