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Corporate governance and tables  
TABLES  
 
Statistical overview | Power stations capacities    
 
Environmental implications of using/saving one kilowatt-hour of electricity  
 
Transmission and distribution equipment in service | Sale of electricity and revenue per category of customer  
   
 
Statistical overview  
   
 
 
  2008     2007     2006     2005  
(15 months) 
  2004     2003     2002     2001     2000     1999     1998  
Sales                                          
Total sold (GWh)1, 2 224 366     218 120     207 921     256 453     206 799     196 980     187 957     181 511     178 193     173 412     171 457  
Growth in GWh sales (%) 2,9     4,9     (18,9)3     30,5     5,0     4,8     3,5     1,8     2,8     1,1     (0,6) 
Electricity output                                          
Total electricity for Eskom system (Eskom stations and purchased) (GWh)4 250 618     243 926     232 295     285 601     229 970     218 412     207 233     198 790     194 601     188 475     185 583  
Total produced by Eskom stations (GWh (net)) 239 108     232 443     221 985     273 404     220 152     210 218     197 737     189 590     189 307     181 818     183 093  
Coal-fired stations (GWh (net)) 222 908     215 211     206 606     251 914     202 171     194 046     181 651     175 223     172 362     165 665     165 473  
Hydroelectric stations (GWh (net)) 751     2 443     1 141     903     720     777     2 357     2 061     1 343     726     1 596  
Pumped storage stations (GWh (net)) 2 979     2 947     2 867     3 675     2 981     2 732     1 738     1 587     2 591     2 590     2 420  
Gas turbine stations (GWh (net)) 1 153     62     78     –     –     –     –     –     1     –     3  
Nuclear power station (GWh (net)) 11 317     11 780     11 293     16 912     14 280     12 663     11 991     10 719     13 010     12 837     13 601  
Total purchased for Eskom system (GWh) 11 511     11 483     10 310     12 197     9 818     8 194     9 496     9 200     5 294     6 657     2 490  
Total consumed by Eskom (GWh)5 4 235     3 937     3 814     5 043     4 040     3 664     2 354     2 177     3 478     3 507     3 299  
Total available for distribution (GWh)2 246 383     239 989     228 481     280 558     225 930     214 748     204 879     196 613     191 123     184 968     182 284  
Plant performance indicators                                          
Total power station nominal capacity (MW) 43 037     42 618     42 011     42 011     42 011     42 011     42 011     42 011     41 298     40 585     39 872  
Total power station net maximum capacity (MW) 38 744     37 761     36 398     36 208     36 208     36 208     36 208     36 208     35 584     34 585     33 977  
Peak demand on integrated Eskom system (MW) 36 513     34 529     33 461     34 195     34 195     31 928     31 621     30 599     29 188     27 813     27 803  
Average energy availability – EAF (UCF) (%)6, 7 84,8 (86,2)    87,5 (88,6)    87,4 (88,7)    89,5 (89,9)8     89,5 (90,0)    87,5 (88,7)    89,3 (91,7)    92,0 (92,5)    92,1 (92,8)    91,0 (92,5)    91,6 (92,7) 
Generation load factor (%)7, 9 72,3     72,4     69,7     69,0     69,2     66,3     62,3     59,8     60,6     61,2     61,6  
Integrated Eskom system load factor (EUF) (%) 85,2     82,7     79,8     78,0     77,4     76,8     74,0     73,4     74,7     75,9     74,8  
Environmental indicators                                          
Relative particulate emissions (kg/MWh sent out) 0,21     0,20     0,21     0,268     0,27     0,28     0,29     0,31     0,35     0,37     0,36  
Specific water consumption (L/kWh sent out)10 1,32     1,35     1,32     1,278     1,26     1,29     1,27     1,26     1,21     1,25     1,23  
Reported legal contraventions counted in the operational health dashboard (number) 11 6     0     1     38     2     2     3     2     3     9     9  
Customer satisfaction (PreCare/MaxiCare) (ratio) –     –     –     8,298     8,31     8,47     8,57     8,43     8,82     8,78     8,90  
Customer satisfaction (Enhanced PreCare/MaxiCare) (ratio)12 97,21     100,80     101,06     93,10     –     –     –     –     –     –     –  
Net raw water consumption (ML) 322 666     313 064     291 516     347 135     277 557     271 940     251 611     239 233     228 759     227 288     225 280  
Coal burnt (Mt) 125,3     119,1     112,1     136,4     109,6     104,4     96,5     94,1     92,5     88,5     87,2  
Average calorific value (MJ/kg) 18,51     19,06     19,58     19,36     19,42     19,41     19,54     19,42     19,50     19,53     19,84  
Average ash content (%) 29,09     29,70     29,10     29,60     29,60     28,90     28,40     28,80     28,60     28,50     29,10  
Average sulphur content (%) 0,87     0,86     0,88     0,87     0,87     0,92     0,92     0,93     0,90     0,96     0,93  
Overall thermal efficiency (%) 33,4     33,9     33,8     34,0     34,0     34,2     34,1     34,1     34,4     34,4     34,2  
Line losses (%) 8,0     8,4     8,2     8,28     7,8     8,3     8,2     7,2     7,4     6,2     5,9  
Nitrous oxide (N2O) (t) 13 2 872     2 730     3 134     3 552     2 924     2 580     2 246     2 154     2 093     2 010     2 031  
Carbon dioxide (CO2) (Mt) 13 223,6     208,9     203,7     247,0     197,7     190,1     175,2     169,3     161,2     159,4     163,2  
Sulphur dioxide (SO2) (kt) 13 1 950     1 876     1 763     2 236     1 779     1 728     1 494     1 500     1 505     1 506     1 583  
Nitrogen oxide (NOx as NO2) (kt) 13 984     930     877     994     797     760     702     684     674     673     669  
Particulate emissions (kt) 50,84     46,08     45,76     72,83     59,17     58,65     57,53     59,64     66,08     67,08     65,21  
Ash produced (Mt) 36,04     34,16     33,40     40,80     33,10     29,80     26,20     26,50     24,60     24,30     24,70  
Ash sold (Mt) 2,4     2,2     1,8     2,0     1,6     1,2     1,3     1,2     1,1     1,1     1,2  
Radiation release (mSv)14 –     –     –     –     –     –     0,0005     0,0007     0,0005     0,0005     0,0007  
Radiation release (mSv)15 0,0041     0,0034     0,0049     0,00798     0,0087     0,0123     0,0060     0,0192     0,0059     0,0112     0,0088  
Low-level radioactive waste (m3) 181,80     86,20     91,30     282,50     258,80     86,90     89,04     117,25     72,80     70,77     61,18  
Intermediate-level radioactive waste (m3) 26,8     36,0     52,4     114,5     97,5     37,4     30,21     45,65     22,10     37,11     22,77  
Low-level nuclear waste – fuel racks (m3)16 697     697     697     697     697     –     –     –     –     –     –  
Spent nuclear fuel (number of elements (cumulative figure)) 112 (1 673)    56 (1 561)    52 (1 505)    104 (1 453)    56 (1 405)    104 (1 349)    48 (1 245)17     104 (1 197)    52 (1 093)    104 (1 041)    52 (937) 
Sales to countries in southern Africa (GWh) 13 908   13 589   13 122   16 008   12 954   10 173   6 956   6 710   3 872   3 884   4 093
Botswana 2 181   1 959   1 727   2 111   1 699   1 390   1 124   1 183   986   934   689
Mozambique 8 491   8 435   8 167   10 108   8 076   5 875   3 907   3 899   1 331   68   385
Namibia 2 087   1 632   1 709   1 821   1 515   1 114   598   578   640   562   602
Zimbabwe 107   589   549   598   532   793   298   371   788   1 564   1 521
Lesotho18 50   50   23   13   12   38   16   40   12   55   209
Swaziland 770   856   760   872   697   796   799   639   115   701   687
Zambia 222   68   187   465   403   151   103        
Short-term energy market19       20   20   16   111        
1 Sales prior to 2005 include internal sales.
2 Difference between electricity available for distribution and electricity sold is due to transmission and other losses.
3 Actual sales growth was 0,8% when compared to the 12 months 1 April 2004 to 31 March 2005.
4 Includes Eskom electricity produced and delivered to neighbouring countries.
5 Used by Eskom for pumped storage facilities and synchronous condenser mode of operation.
6 Capacity hours available times 100 divided by total capacity hours in a year.
7 After excess capacity.
8 Represents the 12-month moving average for 1 April 2004 to 31 March 2005.
9 kWh produced times 100 divided by average net maximum capacity times hours in a year.
10 Volume of water consumed per unit of generated power sent out, excluding Camden and Grootvlei power stations as well as rain and mine water used.
11 2000 to 2002 reported in terms of the revised definition of the operational health dashboard index. Other environmental-related contraventions included since 1998. Only water-related incidents were reported prior to 1998. From 2008, repeat legal contraventions are included in the criteria.
12 Reflects the environmental element of Enhanced MaxiCare.The Enhanced MaxiCare replaced the PreCare/MaxiCare from January 2005.
13 Calculated annual figures based on coal characteristics and power station design parameters excluding Camden, Grootvlei and the gas turbine power stations.
14 Radiation releases, based on the methodology stipulated by the National Nuclear Regulator prior to 2003, included for reference purposes.
15 Indicators have been restated for meaningful comparison based on the more conservative methodology approved by the National Nuclear Regulator from 1 January 2003. The limit set by the National Nuclear Regulator is 0,25mSv.
16 Waste as a result of re-racking of spent fuel elements at Koeberg power station.
17 The 2002 figure was restated as one element was not reported.
18 Lesotho started its own generation in 1999.
19 The short-term energy market consists of all the utilities in the southern African countries that form part of the Southern African Power Pool. Energy is traded on a daily, weekly and monthly basis as there is no long- term bilateral contract.
 
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