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Step 2

The Preliminary Safety Report (PSR) was submitted to the regulators at the end of Step 2. The PSR set out a high level overview of the safety case, the environment case and the security claims for the proposed nuclear reactor design.

The main objective of the PSR was to provide sufficient information for the regulators to carry out Step 2 GDA and the scope of the report was agreed with the regulators during Step 1.

As part of the GDA process, the public was invited to review and comment on the PSR from 16 November 2017 until 31 August 2018. All comments were reviewed and responded to by GNS and were shared with the regulators.

The PSR set out the initial structure of the Pre-Construction Safety Report (PCSR) which, through Steps 3 and 4 of the GDA process, will provide the arguments and evidence to substantiate the safety case claims. For ease of access, the PSR has been split into 27 chapters as shown in the table below.

In November 2018, the Regulators concluded that the information submitted by GNS during Step 2 was sufficient to allow the start of Step 3.

ChapterTopic
1Introduction
2General Plant Description
3Generic Site Characteristics
4General Safety and Design Principles
5Reactor Core
6Reactor Coolant System
7Safety Systems
8Instrumentation & Controls
9Electric Power
10Auxiliary Systems
11Steam and Power Conversion System
12Design Basis Conditions Analysis
13Design Extension Conditions and Severe Accident Analysis
14Probabilistic Safety Assessment
15Human Factors
16Civil Works & Structures
17Structural Integrity
18External Hazards
19Internal Hazards
20MSQA and Safety Case Management
21Reactor Chemistry
22Radiological Protection
23Radioactive Waste Management & Fuel Storage
24Decommissioning
25Conventional Safety
26Environment
27Security