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Sizewell C: environmental permits for a new nuclear power station

NNB Generation Company (SZC) Limited applied for 3 environmental permits to operate Sizewell C. We want your views on our proposed decision and draft permits.

Last fetched 03 May 2026 · gov.uk
Detail

In May 2020, NNB Generation Company (SZC) Limited applied to the Environment Agency for 3 environmental permits to operate Sizewell C. We consulted on these applications from July to October 2020. We have come to a proposed decision on whether we should issue these permits, and if we do what conditions they should include.

The permits are to:

  • dispose of and discharge radioactive waste
  • operate standby power supply systems using diesel generators
  • discharge cooling water and liquid effluent into the North Sea

Our proposed decision is that we should issue all 3 permits. The conclusions of other assessments support our view, including these 4:

  • Radiological Impact Assessment
  • Habitats Regulations Assessment
  • Countryside and Rights of Way Sites of Special Scientific Interest assessment
  • Water Framework Directive

We want your views on our proposed decision, draft permits and supporting documents. We will consider your views before we make our final decision.

We welcome everyone’s views, for example from:

  • the public
  • the energy industry
  • academics with an interest in nuclear power, energy or the environment
  • non-governmental organisations
  • any other organisation or public body

We will publish our final decision in early 2023.

Ways to respond

Respond online through Citizen Space.

Email to psc@environment-agency.gov.uk

Write to:

Sizewell C Consultation
Environment Agency
Permit Support Centre
Quadrant 2
99 Parkway Avenue
Parkway Business Park
Sheffield
S9 4WF

If you need a different document format, email nuclear@environment-agency.gov.uk

Talk to our staff at events
  • Thursday 14 July, 2pm – 7.30pm, Saxmundham Market Hall, High Street, IP17 1AF
  • Friday 15 July, 2pm – 7.30pm, Aldeburgh Parish Church, Church Hall , Victoria Road, IP15 5DU
  • Saturday 16 July, 9am – 1.30pm, Leiston Community Centre, King George’s Avenue, IP16 4JX

We will also organise online events in September. These will be advertised on GOV.UK and Twitter @EnvAgencyAnglia.

Read our personal information charter Personal information charter.

Documents
Environmental permitting of Sizewell C: consultation summary documentNNB Generation Company (SZC) Limited - consultation document for radioactive substances activities draft permitapplication/pdfNNB Generation Company (SZC) Limited - draft permit for radioactive substances activitiesapplication/pdfNNB Generation Company (SZC) Limited - consultation document for water discharge activities draft permitapplication/pdfNNB Generation Company (SZC) Limited - draft permit for water discharge activitiesapplication/pdfNNB Generation Company (SZC) Limited - consultation document for a combustion activity draft permitapplication/pdfNNB Generation Company (SZC) Limited - draft permit for a combustion activityapplication/pdfRadiological impact assessment for the proposed Sizewell C nuclear power stationapplication/pdfHabitats regulations assessment report for the proposed Sizewell C nuclear power station application/pdfBook 1 Radioactive substances activity operational permit habitats regulations assessment reportapplication/pdfBook 2 Combustion activity operational permit habitats regulations assessment reportapplication/pdfBook 3 Water discharge activities operational permit habitats regulations assessment reportapplication/pdfLikely significant effect (LSE) screening: identification of sites and features potentially at riskapplication/pdfHabitats regulations assessment report: Annex 1 - relevant site plans application/pdfHabitats regulations assessment report: Annex 2 - relevant conservation site detailsapplication/pdfHabitats regulations assessment report: Annex 3 - ecological narrative of the designated featuresapplication/pdfSSSI assessment for Sizewell C operational permitsapplication/pdfSizewell C water discharge activity permit application - review of the Water Framework Directive compliance assessmentapplication/pdfEnvironmental permitting of Sizewell C: summary of decision Decision document radioactive substances activity permitapplication/pdfNNB Generation Company (SZC) Limited - permit for radioactive substances activitiesapplication/pdfDecision document water discharge activity permitapplication/pdfNNB Generation Company (SZC) Limited - permit for water discharge activitiesapplication/pdfDecision document combustion activity permitapplication/pdfNNB Generation Company (SZC) Limited - permit for a combustion activityapplication/pdfSizewell C: Water Framework Directive compliance assessment reportapplication/pdfSizewell C: independent dose assessment reportapplication/pdf