TA5 1UD, NNB Generation Company (HPC) Limited, EPR/XP3321GD/V005: environmental permit consultation

Closed 14 Jan 2024

Opened 5 Dec 2023

Published responses

View submitted responses where consent has been given to publish the response.


We have received two applications under the Environmental Permitting (England and Wales) (Amendment) Regulations 2016 from NNB Generation Company (HPC) Limited (NNB GenCo) to change (vary) an existing water discharge activity (WDA) permit (EPR/XP3321GD) for

Hinkley Point C (HPC) construction site at HPC power station

Wick Moor Drove
near Bridgwater

Under permit variation reference number EPR/XP3321GD/V005 the Company has applied to increase the concentration of Ammonia that it is allowed to discharge in the treated liquid generated from the construction sites existing sewage treatment plant (which serves the sites toilet and canteen facilities) into the Severn Estuary. This activity is already covered by the above construction phase permit.

The change is proposed due to daily and weekly changes of workforce numbers being present on site (and because the predicted number of workers required on site in the future is predicted to increase).

The Company has submitted a number of reports to support their application. These reports and the application details can be viewed from the 'Related' documents section below.

Our consultation does not relate to the UK EPR™ design. It is not about the need for nuclear power, UK energy policy, the siting of nuclear power stations, nor the safety and security of the design. You can find further information at: Hinkley Point: nuclear regulation - GOV.UK (www.gov.uk). Here are the aspects and issues we can and cannot take account of.

We can take account of

  • relevant environmental regulatory requirements and technical standards.
  • information on local population and sensitive sites.
  • Comments on whether the right process is being used for the activity, for example whether the technology is the right one.
  • Information that we have not been made aware of in the application, or by correcting incorrect information in the application.

We cannot take account of

  • issues beyond those in the relevant environmental regulations.
  • anything outside the remit of the EPR, e.g. the proposed location of the site, which is done by the local authority via land use planning.
  • whether a site should have a formal designation under Habitats Directive or other conservation legislation.
  • whether the activity should be allowed or not as a matter of principle - for example, we will not consider whether nuclear power generation is an appropriate process or whether alternative methods of generating electricity should be used instead.
  • land use issues when determining a permit application, even if changing the location of the activity would improve its environmental performance.
  • the impact of noise and odour from traffic on site or travelling to and from the site.
  • the legally defined process we follow to determine a permit.
  • the granting of a permit/variation if the operator is able to demonstrate that they can carry out the activity without significant risk to the environment or human health.
  • comments about the government’s energy policy.
  • the granting of a permit if the operator is able to demonstrate that they can carry out the activity without significant risk to the environment or human health.


  • Anyone from any background


  • Water quality
  • Nuclear
  • Environmental permitting