PURPOSE AND SCOPE The purpose of this document is to detail National Grid’s technical and procedural requirements for the minimum security requirements on Integrated Security Solution (ISS) designated new and existing operational electricity substations. This Technical Security Specification (TSS) document has two parts; Part 1 is intended to be the minimum security requirements that shall be deployed and applied to existing sites, new sites, extensions to sites or any other site works on designated Integrated Security Solution (ISS) sites. Part 2 is intended to be the minimum requirements for delivering the ISS signals to the ARC. These will be applicable to all electricity substations that have been designated for the Physical Security Upgrade Programme (PSUP). The requirements listed below will form the basis of the integrated security solution and where there are several options the individual Site Specific Operational Requirements (SSOR) documents will specify which option to for a specific site. The SSOR can only select from the solutions in the TSS and a Technical Deviation should be sought for any other solution. The process flow is therefore TSS-SSOR-Front End Engineering Design (FEED) Design Intend Document (DID)-Detailed Design-Design Approval-Design Assurance-Construction.

This document also relates to additional measures that may be required on sites to enable the site to be further secured, such as tunnel security measures where applicable.

TSS Objectives

To provide minimum standards required for implementing an agreed integrated security solution to ISS designated sites.

To enable key stakeholders to understand the purpose and requirements of the ISS and the requirements for the successful implementation of the PSUP.

To obtain engagement from the business functions to support the implementation of the programme.

To ensure the most appropriate value engineered solutions are considered. Where options are given in the TSS, National Grid will retain the right to audit and challenge design decisions made from a value engineering perspective.

To provide temporary Security requirements during construction.

To provide a document that along with the SSOR can be utilised by the Home Office CAST auditors. These Fit for Purpose (FFP) audits are completed on DECC’s instructions at the end of both design and construction phases.

To provide a document that along with the SSOR can be utilised by the Value for Money (VFM) auditors. These Value for Money (VFM) audits are completed on DECC’s instructions at the end of both design and construction phases.

Critical Assets and Systems will be determined on a site by site basis and identified in the Asset Management Needs Case.