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EDF Energy, Sizewell B power station, Nr Leiston, Suffolk, IP16 4UR
IP16 4UR
Last updated: 19 Jul 2025 15:17 UTC
26 Components Nuclear EDF Energy Nuclear Generation Limited
Total Capacity: 2851.35 MW
Components: 26
Technologies:
Nuclear
Unique CMUs: 6

Secondary Trading Contacts

Contact Information

Component Descriptions

Sizewell B Power Station CMU 1: [SZ1-16] T_SIZB-1 + (50% x T_SIZB-D)

Used by 2 CMUs

Sizewell B Power Station CMU 1: [SZ1-17] T_SIZB-1 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 1: [SZ1-18] T_SIZB-1 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 1: [SZ1-19] T_SIZB-1 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 1: [SZ1-20] T_SIZB-1 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 1: [SZ1-21] T_SIZB-1 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 1: [SZ1-22] T_SIZB-1 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 1: [SZ1-23] T_SIZB-1 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 1: [SZ1-24] T_SIZB-1 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 2: [SZ2-16] T_SIZB-2 + (50% x T_SIZB-D)

Used by 2 CMUs

Sizewell B Power Station CMU 2: [SZ2-17] T_SIZB-2 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 2: [SZ2-18] T_SIZB-2 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 2: [SZ2-19] T_SIZB-2 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 2: [SZ2-20] T_SIZB-2 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 2: [SZ2-21] T_SIZB-2 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 2: [SZ2-22] T_SIZB-2 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 2: [SZ2-23] T_SIZB-2 + (50% x T_SIZB-D)

Used by 1 CMU

Sizewell B Power Station CMU 2: [SZ2-24] T_SIZB-2 + (50% x T_SIZB-D)

Used by 1 CMU

CMU Identifiers

6 CMUs at this location (showing first 5):

SIZB-1 SIZB-2 SZ1-16 SZ1-18 SZ2-16 + 1 more

Components at this Location

Click on yellow auction year badges to see individual component pages

Sizewell B Power Station CMU 1: [SZ1-16] T_SIZB-1 + (50% x T_SIZB-D)
CMU: SZ1-16
None EDF ENERGY NUCLEAR GENERATION LIMITED
Capacity Information:
De-Rated Capacity (Registry) 519.658
Connection/DSR Capacity 616
Anticipated Capacity 519.658
2020-21 (T-4) Four Year Ahead Capacity Auction 2017-18 (T-1) One Year Ahead Capacity Auction (2/2) 2 2017-18 (T-1) One Year Ahead Capacity Auction (1/2) 2
CMU: SZ1-18
None EDF ENERGY NUCLEAR GENERATION LIMITED Parent: EDF Energy Holdings Limited
Capacity Information:
De-Rated Capacity (Registry) 518.672
Connection/DSR Capacity 616
Anticipated Capacity 544.774
2017-18 (T-1) One Year Ahead Capacity Auction
Sizewell B Power Station CMU 1: [SZ1-17] T_SIZB-1 + (50% x T_SIZB-D)
CMU: SIZB-1
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2021-22 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 1: [SZ1-18] T_SIZB-1 + (50% x T_SIZB-D)
CMU: SIZB-1
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2022-23 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 1: [SZ1-19] T_SIZB-1 + (50% x T_SIZB-D)
CMU: SIZB-1
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2023-24 (T-4) Four Year Ahead Capacity Auction 2022-23 (T-3) Three Year Ahead Capacity Auction
Sizewell B Power Station CMU 1: [SZ1-20] T_SIZB-1 + (50% x T_SIZB-D)
CMU: SIZB-1
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2024-25 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 1: [SZ1-21] T_SIZB-1 + (50% x T_SIZB-D)
CMU: SIZB-1
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2025-26 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 1: [SZ1-22] T_SIZB-1 + (50% x T_SIZB-D)
CMU: SIZB-1
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2026-27 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 1: [SZ1-23] T_SIZB-1 + (50% x T_SIZB-D)
CMU: SIZB-1
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2027-28 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 1: [SZ1-24] T_SIZB-1 + (50% x T_SIZB-D)
CMU: SIZB-1
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2028-29 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 2: [SZ2-16] T_SIZB-2 + (50% x T_SIZB-D)
CMU: SZ2-16
None EDF ENERGY NUCLEAR GENERATION LIMITED
Capacity Information:
De-Rated Capacity (Registry) 519.658
Connection/DSR Capacity 616
Anticipated Capacity 519.658
2020-21 (T-4) Four Year Ahead Capacity Auction 2017-18 (T-1) One Year Ahead Capacity Auction (2/2) 2 2017-18 (T-1) One Year Ahead Capacity Auction (1/2) 2
CMU: SZ2-18
None EDF ENERGY NUCLEAR GENERATION LIMITED
2017-18 (T-1) One Year Ahead Capacity Auction
Sizewell B Power Station CMU 2: [SZ2-17] T_SIZB-2 + (50% x T_SIZB-D)
CMU: SIZB-2
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2021-22 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 2: [SZ2-18] T_SIZB-2 + (50% x T_SIZB-D)
CMU: SIZB-2
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2022-23 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 2: [SZ2-19] T_SIZB-2 + (50% x T_SIZB-D)
CMU: SIZB-2
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2023-24 (T-4) Four Year Ahead Capacity Auction 2022-23 (T-3) Three Year Ahead Capacity Auction
Sizewell B Power Station CMU 2: [SZ2-20] T_SIZB-2 + (50% x T_SIZB-D)
CMU: SIZB-2
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2024-25 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 2: [SZ2-21] T_SIZB-2 + (50% x T_SIZB-D)
CMU: SIZB-2
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2025-26 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 2: [SZ2-22] T_SIZB-2 + (50% x T_SIZB-D)
CMU: SIZB-2
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2026-27 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 2: [SZ2-23] T_SIZB-2 + (50% x T_SIZB-D)
CMU: SIZB-2
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2027-28 (T-4) Four Year Ahead Capacity Auction
Sizewell B Power Station CMU 2: [SZ2-24] T_SIZB-2 + (50% x T_SIZB-D)
CMU: SIZB-2
Nuclear EDF Energy Nuclear Generation Limited
Capacity Information:
De-Rated Capacity (Registry) 507.03
Connection/DSR Capacity 616
Anticipated Capacity 507.03
2028-29 (T-4) Four Year Ahead Capacity Auction