Guidance

LLW Repository 2026 Environmental Safety Case

Nuclear Waste Services’ (NWS) purpose is to safely manage the UK’s radioactive waste – today and for the future.

• From: Nuclear Waste Services
• Published: 11 May 2026
• Last updated: 22 June 2026
  Show all updates

  1. 22 June 2026

     19 ESC Reports published

  2. 12 May 2026

     Page updated to remove HTML please refer to the PDF

  3. 11 May 2026

     First published.

Documents

2026 Environmental Safety Case for the LLWR - Guide to the Key Points

PDF, 15.7 MB, 31 pages

LLWR ESC R 26 10166 Main Report

PDF, 4.37 MB, 188 pages

LLWR ESC R 26 10167 Management and Dialogue

PDF, 1.03 MB, 94 pages

LLWR ESC R 26 10168 Site History and Description

PDF, 4.55 MB, 84 pages

LLWR ESC R 26 10169 Disposal Facility Inventory

PDF, 4.27 MB, 198 pages

LLWR ESC R 26 10170 Engineering Design

PDF, 6.04 MB, 161 pages

LLWR ESC R 26 10171 Near Field

PDF, 7.6 MB, 208 pages

LLWR ESC R 26 10172 Hydrogeology

PDF, 8.82 MB, 160 pages

LLWR ESC R 26 10173 Site Evolution

PDF, 3.58 MB, 111 pages

LLWR ESC R 26 10174 Monitoring

PDF, 5.83 MB, 144 pages

LLWR ESC R 26 10175 Optimisation and Site Development_Plan

PDF, 2.2 MB, 156 pages

LLWR ESC R 26 10176 Waste Management Plan

PDF, 2.71 MB, 142 pages

LLWR ESC R 26 10177 Safety Functions

PDF, 1.83 MB, 112 pages

LLWR ESC R 26 10178 Engineering Performance Assessment

PDF, 3.58 MB, 211 pages

LLWR ESC R 26 10179 Environmental Safety During the Period of Authorisation

PDF, 5.1 MB, 170 pages

LLWR ESC R 26 10180 Assessment of Long-term Radiological Impacts

PDF, 10.5 MB, 397 pages

LLWR ESC R 26 10181 Hydrogeological Risk Assessment

PDF, 6.24 MB, 252 pages

LLWR ESC R 26 10182 Assessment of impacts on non-human biota

PDF, 3.71 MB, 105 pages

LLWR ESC R 26 10183 Implementation

PDF, 2.01 MB, 204 pages

LLWR ESC R 26 10184 Addressing Regulatory Requirements and Feedback

PDF, 1.71 MB, 280 pages

Details

NWS has submitted a major update to its Environmental Safety Case (ESC) for the Low Level Waste Repository to the Environment Agency. This is a requirement of the Repository’s Environmental Permit to dispose of solid radioactive waste.

The Environmental Safety Case is a rigorous set of reports which considers environmental safety now, and up to thousands of years in the future.