EDF / 2019 Universal registration document

1. The Group, its strategy and activities Description of the Group’s activities

CURRENT OPERATING LIVES* AND CLOSURE DATES

Life Extensions (Already Formally Declared)

Associated Scheduled Closure Date

Scheduled Periodic Safety Reviews

Type of reactor

Start of Generation Feb. 1976 Feb. 1976 Apr. 1983 Jul. 1983 August 1983

Power Station Lifetime (Formally Declared)

Power Plant

Hinkley Point B Hunterston B Dungeness B

AGR AGR AGR AGR AGR AGR AGR PWR

47 years 47 years 45 years 41 years 41 years 42 years 42 years 40 years

22 years 22 years 20 years 15 years 15 years 17 years 17 years

2023 2023 2028 2024 2024 2030 2030 2035

2017 2017 2018 2019 2019 2020 2020 2025

Heysham 1 Hartlepool

Torness

May 1988 Jul. 1988 Feb. 1995

Heysham 2 Sizewell B

-

As formally recorded by EDF Energy and approved by the NDA. *

CAPACITY AND OUTPUT BY POWER PLANT

Output  (2) (in TWh)

Power Plant

Power  (1) (in MW)

AGR Power Plants

2019 (0.2)

2018

Dungeness B Hartlepool Heysham 1 Heysham 2 Hinkley Point B Hunterston B

1,090 1,185 1,060 1,240

5.7 8.1 7.4 8.9 7.2 3.8 8.6

7.6 6.8

10.3

965 985

6.9 1.0

Torness

1,200

10.1

PWR Power Plant Sizewell B

1,198 8,923

8.5

9.4

TOTAL

51.0

59.1

LOAD FACTOR  (3)

65%

76%

Capacities are stated net of all power consumed for the power stations’ own use, including power imported from the Grid. (1) Output in each year reflects any refuelling, planned and unplanned outages. (2) Load factors are obtained by dividing the actual output by the output that would have been achieved by each power plant operated at its stated capacity (3) appropriate for the period.

Operational review of the existing nuclear generation fleet The nuclear generation fleet produced 51.0TWh during 2019, 8.1TWh less than 2018 (59.1TWh). The reduction in output is largely due to the extended outages at Dungeness B to address corrosion on cooling water pipework and the discovery of steam pipework cracking and the extended outages at Hunterston B for graphite inspections and safety case work. Planned statutory outages were completed on Hartlepool Reactor 2, Hinkley Point B Reactor 3, Hunterston B Reactor 3 and Sizewell B. A statutory outage was started on Dungeness B Reactor 22 in August 2018 with an associated outage on Reactor 21 starting in September for work on common systems. These outages have been extended to address corrosion on cooling water pipework and the discovery of steam pipework cracking. The units are expected to return to service in May/April 2020. Hunterston B Reactor 3 was shut down for a scheduled graphite core inspection in March 2018. Following the discovery of new keyway root cracks in the reactor core at a slightly higher rate than modelled in the current safety case, EDF Energy took the decision to keep the reactor offline for further inspections and safety case work. A graphite core inspection on Hunterston B Reactor 4 planned for 2019 was also brought forward to October 2018. A safety case for the return to service of Reactor 3

was submitted to the ONR in June 2019 and is being assessed. Meanwhile, Reactor 4 was returned to service in August 2019 but was shut down again in December 2019 awaiting approval of the Reactor 3 case. Both units are expected to return to service in Q1 2020, provided that the examination of the safety case confirms the proposed schedule. The scheduled dates for the return of these units have been postponed several times throughout the year 2019 due to the complexity of this case. Radioactive Waste Management In the UK, radioactive waste is classified into four categories: Low Level Waste (LLW), for which a near surface disposal route exists – including ■ the LLW Repository at Drigg West Cumbria; Intermediate Level Waste (ILW), for which no disposal route is currently available ■ in the UK; High Level Waste (HLW) is defined as radioactive waste in which the temperature ■ may rise significantly as a result of the radioactivity, so this factor has to be taken into account in the design of storage and disposal facilities; Higher Activity Waste (HAW) – this is effectively HLW, ILW and any LLW that are ■ unsuitable for near-surface disposal.

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EDF | Universal registration document 2019