Wylfa 1

Permanent Shutdown

Details

Reactor Type	Gas-Cooled Reactor (or GCR)
Model	MAGNOX
Owner	Nuclear Decommissioning Authority
Operator	Magnox, Ltd

Timeline

Construction Start	Sunday, 1 September 1963
First Criticality	Saturday, 1 November 1969
First Grid Connection	Sunday, 24 January 1971
Commercial Operation	Monday, 1 November 1971
Permanent Shutdown	Wednesday, 30 December 2015

Specifications

Capacity Net	490 MWe
Capacity Gross	530 MWe
Thermal Capacity	1650 MWt
Design Net Capacity	550 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 (%)
1971	495	5213	860.89	87.00	47.20	47.20	47.20	47.20
1972	495	0	1513.15	0.00	35.00	36.70	35.00	36.80
1973	420	0	1118.45	0.00	30.50	34.10	30.50	34.10
1974	420	8568	2182.00	98.10	59.50	41.60	59.50	41.60
1975	420	4437	791.50	50.80	21.60	37.00	21.60	37.00
1976	420	8633	2409.00	97.00	66.80	42.70	64.40	42.20
1977	420	8008	2492.00	91.70	70.00	46.90	67.90	46.20
1978	420	7739	1900.50	88.60	52.50	47.70	51.80	47.00
1979	420	8694	2600.00	99.50	74.90	50.90	70.90	49.80
1980	420	8609	2882.00	98.60	78.10	53.80	78.60	52.90
1981	420	8823	3117.00	99.10	83.20	56.70	83.40	55.90
1982	420	8700	3020.00	98.50	81.70	58.90	81.40	58.10
1983	420	8715	3148.00	99.80	83.90	60.90	85.80	60.40
1984	420	8728	3378.50	99.90	89.50	63.00	92.10	62.70
1985	420	8736	3341.25	100.00	88.40	64.80	91.10	64.70
1986	420	7939	2049.95	90.60	61.90	64.60	55.70	64.10
1987	420	8611	2249.70	96.70	58.80	64.30	60.20	63.90
1988	420	8530	3086.18	97.60	83.80	65.40	84.10	65.00
1989	420	8572	3307.02	97.60	86.90	66.60	89.60	66.40
1990	420	8549	3373.20	97.90	89.90	67.80	91.90	67.70
1991	420	8374	3725.65	95.90	89.70	68.80	101.50	69.30
1992	475	8904	3897.59	100.00	92.10	70.10	92.20	70.60
1993	475	8477	3607.61	97.00	86.80	70.90	86.90	71.40
1994	475	6933	3055.49	79.40	72.40	71.00	73.60	71.50
1995	475	6216	2928.82	71.00	69.70	70.90	70.40	71.40
1996	475	8438	3973.85	96.10	93.20	71.90	95.20	72.50
1997	490	7353	3534.78	83.90	81.90	72.30	82.40	72.90
1998	490	8079	3725.16	92.20	86.30	72.90	86.80	73.40
1999	490	7632	3130.26	87.10	72.70	72.90	72.90	73.40
2000	490	2460	1000.95	28.00	23.30	71.00	23.30	71.50
2001	490	3451	1306.51	39.40	30.40	69.50	30.40	70.00
2002	490	8541	4058.30	97.50	94.40	70.40	94.60	70.90
2003	490	6389	2916.04	72.90	67.90	70.30	67.90	70.80
2004	490	8784	4144.31	100.00	96.10	71.20	96.30	71.60
2005	490	7200	2967.86	82.20	69.10	71.10	69.10	71.60
2006	490	8598	3730.40	98.20	86.90	71.60	86.90	72.00
2007	490	4401	1569.94	50.20	36.60	70.50	36.60	71.00
2008	490	8784	3944.36	100.00	91.60	71.20	91.60	71.60
2009	490	5672	2343.01	64.80	54.60	70.70	54.60	71.10
2010	490	8760	3480.52	100.00	81.10	71.00	81.10	71.40
2011	490	5487	2270.31	62.60	52.90	70.50	52.90	70.90
2012	490	6624	2578.25	75.40	59.90	70.20	59.90	70.60
2013	490	8693	3648.93	99.20	85.00	70.60	85.00	70.90
2014	490	4355	1643.62	49.70	38.30	69.80	38.30	70.10
2015	490	8098	3265.82	92.70	76.00	69.90	76.30	70.30