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Electric Power Generation after the Great East Japan Earthquake

On 11 March a big earthquake and tsumani hit the eastern part of Japan. The incident of Fukushima Daiichi nuclear power plant has had a certain impact on the electricity production in Japan.

After the Earthquake on 11 of March, the total electricity production in Japan has considerably declined; 64.4 billiion kWh in April, showing 11 million kWh of decrease over the previous month, a slight recover in May (6.51 billion kWh), followed by another recovery in June (6.91 billion kWh). Focusing on the electricity production in June 2011, it shows a 2.75 million decrease compared with the same month last year. After the Earthquake, the nuclear power generation shows a large decrease (from 21.23 million kWh in March 2011 to 12.95 million in June 2011). The hydro power generation compensates the decrease, doubled from 4.71 million kWh in March to 8.59 million kWh in June. On the other hand, the thermal power generation decreased from 48.93 million kWh in March to 40.89 million kWh in April, but it showed a quick recovery in May and June (47.39 million kWh in June). The solar power generation still makes only a very small part of the total generation, but it has jumped sharply to 1,5 million kWh after the Earthquake compared with 35 thousand kWh in 2010).

Table 1 : Power production in Japan (April 2010~June 2011)（Unit：1,000kWh）

Generation methods	2010
	Apr.	May.	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.
Hydro Power	7,811,251	8,296,524	7,988,666	9,295,049	7,631,681	5,765,970	4,903,093	4,362,275	5,045,776
Thermal Power	38,350,362	35,879,848	40,458,322	49,057,652	56,257,984	49,755,398	39,890,854	41,846,544	48,793,963
(Biomass)*	(117,986)	(137,288)	(137,000)	(129,975)	(129,594)	(146,909)	(132,944)	(143,321)	(145,634)
(Waste Material)*	(25,150)	(31,169)	(15,016)	(28,739)	(31,079)	(30,804)	(19,146)	(20,535)	(20,604)
Nuclear Power	23,516,456	22,564,874	23,249,050	25,424,987	25,495,910	23,458,728	26,257,416	25,070,660	24,673,973
Wind Force Power	3,000	2,356	1,549	1,573	1,226	2,073	2,326	2,334	18,839
Solar Power	31	36	29	32	37	53	230	388	480
Geothermal Power	217,060	236,205	201,119	203,807	213,430	205,172	184,914	180,049	218,973
TOTAL	69,898,160	66,979,843	71,898,735	83,983,100	89,600,268	79,187,394	71,238,833	71,462,250	78,752,004

 

Generation methods	2011
	Jan.	Feb.	Mar.	Apr.	May.	Jun.
Hydro Power	4,560,123	3,807,001	4,707,337	5,381,470	8,257,888	8,587,049
Thermal Power	56,902,682	47,140,284	48,930,415	40,888,916	41,726,673	47,388,632
(Biomass)*	(146,913)	(150,168)	(156,979)	(134,074)	(141,086)	(140,148)
(Waste Material)*	(19,338)	(11,917)	(18,962)	(17,508)	(22,490)	(14,325)
Nuclear Power	24,035,068	23,247,122	21,236,236	17,958,995	14,883,021	12,959,092
Wind Force Power	25,585	13,828	18,017	18,122	14,804	9,392
Solar Power	736	778	1,701	1,873	1,360	1,509
Geothermal Power	215,049	191,715	201,982	191,481	201,972	200,380
TOTAL	85,739,243	74,400,728	75,095,688	64,440,857	65,085,718	69,146,054

(Resources：Agency for Natural Resources and Energy)
（　）* Out of the thermal power generation

After the Earthquake on 11 of March, the total electricity production in Japan has considerably declined; 64.4 billiion kWh in April, showing 11 million kWh of decrease over the previous month, a slight recover in May (6.51 billion kWh), followed by another recovery in June (6.91 billion kWh). Focusing on the electricity production in June 2011, it shows a 2.75 million decrease compared with the same month last year. After the Earthquake, the nuclear power generation shows a large decrease (from 21.23 million kWh in March 2011 to 12.95 million in June 2011). The hydro power generation compensates the decrease, doubled from 4.71 million kWh in March to 8.59 million kWh in June. On the other hand, the thermal power generation decreased from 48.93 million kWh in March to 40.89 million kWh in April, but it showed a quick recovery in May and June (47.39 million kWh in June). The solar power generation still makes only a very small part of the total generation, but it has jumped sharply to 1,5 million kWh after the Earthquake compared with 35 thousand kWh in 2010).

 

Chart 1 : Shift in power generated (%) after the Earthquake by generator type (March-June 2011)

(Resources：Agency for Natural Resources and Energy)

Chart 2: Total power generated in Japan (April 2010 – June 2011)（Unit：1,000kWh）

(Resources：Agency for Natural Resources and Energy)

 

(Resources：Agency for Natural Resources and Energy)

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