Olkiluoto 1

Operable

Details

Reactor Type	Boiling Water Reactor (or BWR)
Model	ABB-III, BWR-2500
Owner	Teollisuuden Voima Oyj
Operator	Teollisuuden Voima Oyj

Timeline

Construction Start	Friday, 1 February 1974
First Criticality	Friday, 21 July 1978
First Grid Connection	Saturday, 2 September 1978
Commercial Operation	Wednesday, 10 October 1979

Specifications

Capacity Net	890 MWe
Capacity Gross	920 MWe
Thermal Capacity	2500 MWt
Design Net Capacity	660 MWe

Operational History

Electricity Supplied (GWh)

Energy Availability Factor (%)

Total Electricity Supplied (GWh)

Reactor History

Year	Reference Unit Power (MWe)	Annual Time Online (Hours)	Electricity Supplied (GWh)	Operation Factor (%)	Energy Availability Annual (%)	Energy Availability Cumulative (%)	Load Factor Annual (%)	Load Factor Cumulative (%)
1978	660	374	103.20	-	-	-	-	-
1979	660	5614	3465.00	90.40	86.80	86.80	86.80	86.80
1980	658	6849	4280.80	78.00	76.30	78.40	74.10	76.60
1981	660	7353	4549.20	83.90	80.80	79.50	78.70	77.50
1982	658	7903	4997.50	90.20	86.70	81.70	86.70	80.40
1983	678	7651	4808.30	87.30	81.90	81.70	82.00	80.80
1984	710	8247	5505.61	93.90	91.90	83.80	90.30	82.60
1985	710	8180	5414.51	93.40	88.80	84.60	87.10	83.40
1986	710	8008	5463.21	91.40	90.10	85.40	87.80	84.00
1987	710	8142	5636.46	93.00	92.00	86.20	90.60	84.90
1988	710	8248	5778.87	93.90	94.10	87.10	92.70	85.70
1989	710	7278	5056.20	83.10	83.20	86.70	81.30	85.30
1990	710	8356	5857.31	95.40	95.60	87.50	94.20	86.10
1991	710	8373	5873.22	95.60	94.80	88.10	94.40	86.80
1992	710	8251	5803.04	93.90	93.20	88.50	93.00	87.30
1993	710	8433	5944.92	96.30	95.30	89.00	95.60	87.90
1994	710	8485	5978.04	96.90	96.00	89.50	96.10	88.40
1995	710	8427	5931.50	96.20	95.50	89.90	95.40	88.90
1996	710	8212	5938.60	93.50	92.10	90.00	95.20	89.20
1997	790	8254	6374.15	94.20	93.80	90.20	94.20	89.50
1998	840	8384	6807.01	95.70	95.00	90.50	92.50	89.70
1999	840	8542	7111.82	97.50	96.40	90.90	96.60	90.10
2000	840	8448	7043.10	96.20	95.20	91.10	95.40	90.40
2001	840	8561	7163.80	97.70	97.20	91.40	97.40	90.80
2002	840	8377	6997.54	95.60	95.00	91.60	95.10	91.00
2003	840	8515	7127.43	97.20	96.50	91.80	96.90	91.30
2004	840	8329	7009.02	94.80	94.70	92.00	95.00	91.40
2005	840	8588	7221.07	98.00	97.70	92.20	98.10	91.70
2006	860	8206	6973.38	93.70	92.60	92.20	93.60	91.80
2007	860	8554	7334.94	97.60	96.80	92.40	97.40	92.00
2008	860	8288	7066.02	94.40	93.10	92.40	93.50	92.10
2009	860	8548	7295.77	97.60	96.70	92.60	96.80	92.30
2010	880	8120	6976.89	92.70	91.40	92.50	91.50	92.20
2011	880	8410	7289.82	96.00	94.80	92.60	94.60	92.30
2012	880	8013	6973.36	91.20	90.10	92.50	90.20	92.20
2013	880	8555	7470.41	97.70	96.40	92.70	96.90	92.40
2014	880	8337	7266.09	95.20	94.00	92.70	94.30	92.50
2015	880	8506	7396.91	97.10	95.70	92.80	96.00	92.60
2016	880	8146	7047.81	92.70	90.90	92.70	91.20	92.50
2017	880	8289	7158.27	94.60	92.60	92.70	92.90	92.50
2018	880	7731	6755.36	88.20	87.60	92.60	87.60	92.40
2019	890	8539	7542.04	97.50	96.50	92.70	96.70	92.50
2020	890	8391	7310.06	95.50	93.20	92.70	93.50	92.60
2021	890	8375	7404.18	95.60	94.60	92.80	95.00	92.60
2022	890	7827	6931.89	89.40	88.50	92.70	88.90	92.50
2023	890	8517	7428.24	97.20	96.40	92.80	95.30	92.60