Nuclear indicators

Transparency

In 2023, installed nuclear power capacity corresponded to 5% of the Group's total installed capacity. Electricity production from nuclear power accounted for 14.1% of total production (excluding steam generation) and sales from nuclear power production are less than 2% of the Group's total sales.

Unplanned automatic shutdowns for every 7000 H*

(WANO UA7)

*Iberdrola joint value calculated on the WANO  UA7 (24 months) indicators of nuclear power plants weighted by Iberdrola share power and ownership. Indicator does not take into account the Sta. María de Garoña NPP which was not included on WANO indicators during 2013.

Year Automatic shutdowns
2013 0.54
2014 0.51
2015 0.24
2016 0.16
2017 0.20
2018 0.08
2019 0.18
2020 0.30
2021 0.49
2022 0.64
2023 0.68

 

Number of notified events by type according INES Scale*

Annual values depend much on the number of refueling outages within the year and are subjected to normal statistical fluctuations.

*Iberdrola joint value calculated on the events notified by nuclear power plants weighted by Iberdrola share power and ownership. Notified events according to the Safety Instructions IS-10 of the Nuclear Safety Council 

YEAR N0 N1 N2 N≥3
2013 5.7 0 0 0
2014 4.4 0.1 0 0
2015 5.6 0.3 0 0
2016 2 0.3 0 0
2017 5.5 0.3 0 0
2018 4.8 0 0 0
2019 3.8 0.1 0 0
2020 1.9 0.1 0 0
2021 4,5 0.6 0 0
2022 5.0 0.3 0 0
2023 5 0.3 0 0

 

Public Collective Dose IB Fleet (Public) (mSv*Person)

* Collective dose received by all the inhabitants of the population closest to the plant, weighted by Iberdrola's Power, considering that all the inhabitants have received the same dose as that of the critical individual (fictitious person who receives the maximum envelope dose of the of any person living in the area.) The dose received by the critical individual is calculated by the radiological protection services of each plant and is published in the monthly operating report, which is controlled by the regulator (CSN). people is obtained from the data published by the National Institute of Statistics (INE). The values depend on the number of recharges made in the year.

YEAR

PUBLIC COLLECTIVE DOSE
(mSv*Person)

2019 0.69
2020 0.56
2021 1.07
2022 0.83
2023 1.71

 

Collective dose (WANO CRE) (Workers) Sv-Person*

Variations of this indicator depend on the number and lenght of refueling outages within the year. Actions continue to be taken to optimize the collective dose

*Iberdrola joint value calculated on the WANO CRE indicators of nuclear power plants weighted by Iberdrola share power and ownership and considering its fuel cycle. Indicator does not take into account the Sta. Mª de Garoña NPP which it is not included in WANO  indicators since 2013.

YEAR

COLLECTIVE DOSE
(Sv-Person)

2013 0.71
2014 0.7
2015 0.72
2016 0.69
2017 0.64
2018 0.71
2019 0.67
2020 0.52
2021 0.53
2022 0.51
2023 0.52

 

Generated and conditioned waste of low and medium activity (m³)

Annual values depend on the number of refueling outages within the year and are subjected to normal statistical fluctuations

*Iberdrola joint value calculated on the amount of generated waste of low and medium activity and packed in each plant weighted by Iberdrola share power and ownership.

YEAR

GENERATED AND CONDITIONED WASTE OF LOW AND MEDIUM ACTIVITY (m3)

2013 129.7
2014 121.8
2015 132.3
2016 150.4
2017 150.8
2018 147.2
2019 152.4
2020 109.4
2021 144.5
2022 125.1
2023 114.9

 

Generated and conditioned waste of low activity (m³)

 

*Iberdrola joint value calculated on the amount of generated waste of low activity and packed in each plant weighted by Iberdrola share power and ownership.

YEAR

GENERATED AND CONDITIONED WASTE OF LOW ACTIVITY (m3)

2019 99.13
2020 67.97
2021 93.50
2022 69.87
2023 69.87

 

Generated and conditioned waste of medium activity (m³)

*Iberdrola joint value calculated on the amount of generated waste of medium activity and packed in each plant weighted by Iberdrola share power and ownership.

YEAR

GENERATED AND CONDITIONED WASTE OF MEDIUM ACTIVITY (m3)

2019 53.22
2020 41.45
2021 51.02
2022 55.24
2023 58.72

 

High-level waste generated annually (Spent Fuel) (tU Initial)*

Cumulative value obviously increases every year and annual value fluctuates because it depends much on the number of refueling outages within the year

*Iberdrola joint value calculated on the amount of initial U of each element discharged annually in the fuel pool at each plant weighted by Iberdrola share power and ownership.

YEAR

ANNUAL SPENT FUEL

(tU Initial)

2013 21
2014 13
2015 25
2016 16
2017 23
2018 14
2019 25
2020 9
2021 28
2022 12
2023 18

 

Cumulative spent fuel (tU Initial)*

Cumulative value obviously increases every year and annual value fluctuates annualy because depend much on the number of refueling outages within the year

*Iberdrola joint value calculated on the amount of initial U of each element in the fuel pool at each plant weighted by Iberdrola share power and ownership.

YEAR

CUMULATIVE SPENT FUEL
(tU Initial)

2013 596
2014 609
2015 634
2016 650
2017 673
2018 688
2019 713
2020 722
2021 750
2022 762
2023 773

 

 

Volume of radioactive operational waste per year (m³)*

  2021 2022 2023
High radioactive waste (spent fuel) 1.1 0.8 0.9
Medium radioactive waste 51.0 55.2 58.7
Low radioactive waste 93.5 69.9 56.1
Medium and low combined 144.5 125.1 114.9
Aggregate of all thre types of radioactive wastes 145.6 125.9 115.8

*Values for Iberdrola calculated by taking the individualvalues of each type of waste generated at each power plant, weighted by Iberdrola share power and ownership.

 

 

Amount of decommissioning waste (m³)

Increase in 2015 value is due to AVANGRID operation (Ownership percentage has raised from 9 % to 15.5 % in Connecticut Yankee Atomic)

*Spent Fuel from Maine Yankee, Yankee Rowe and Connecticut Yankee is considered in this indicator. These spent fuel elements are stored in one ISFSI per site, waiting for USA Federal Government to remove it.

YEAR

AMOUNT OF DECOMMISSIONING WASTE (m3)

2013 2,031
2014 2,031
2015 2,202
2016 2,202
2017 2,202
2018 2,202
2019 2,202
2020 2,202
2021 2,202
2022 2,202
2023 2,202