Office for Nuclear Regulation
An agency of HSE

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Office for Nuclear Regulation (ONR) Permissioning inspection - Technical assessment guides

The guides available below are the latest issues. As revised versions are produced they will replace the older versions.

Should an earlier issue be required, please request it via onrenquiries@hse.gov.uk.

Class Definition
CNS-TAST-GD-001 Guidance on the purpose , scope and quality of nuclear site security plan (NSSP)
T/AST/FWD Foreword
T/AST/002 Radiation Shielding
T/AST/003 Safety Systems
T/AST/004 Fundamental principles
T/AST/005 ONR Guidance on the Demonstration of ALARP (As Low As Reasonably Practicable)
T/AST/006 Deterministic safety analysis and the use of engineering principles in safety assessment
T/AST/008 Withdrawn
T/AST/009 Examination, Inspection, Maintenance and Testing of Items Important to Safety (Revision 2)
T/AST/010 Early initiation of safety systems
T/AST/011 The single failure criterion
T/AST/013 External hazards
T/AST/014 Internal hazards
T/AST/015 Electromagnetic compatibility
T/AST/016 Integrity of Metal Components and Structures
T/AST/017 Structural integrity: civil engineering aspects
T/AST/018 Criticality Warning Systems
T/AST/019 Containment: Essential services
T/AST/020 Containment: Reactor Plant
T/AST/021 Containment: Chemical plants
T/AST/022 Ventilation
T/AST/023 Control of processes involving nuclear matter
T/AST/024 Management of radioactive materials and radioactive waste on nuclear licensed sites
T/AST/026 Decommissioning on nuclear licensed sites
T/AST/027 Training and assuring personnel competence
T/AST/028 Control and instrumentation aspects of nuclear plant commissioning
T/AST/029 Withdrawn
T/AST/030 Probabilistic Safety Analysis
T/AST/031 Safety related instrumentation
T/AST/033 Licensee management of records
T/AST/034 Transient analysis for DBAs in nuclear reactors
T/AST/035 The Limits and Conditions for Nuclear Plant Safety
T/AST/036 Diversity, redundancy, segregation and layout of mechanical plant
T/AST/037 Heat transporter systems
T/AST/038 Radiological protection
T/AST/041 Criticality Safety
T/AST/042 Validation of computer codes and calculation methods
T/AST/043 Radiological Analysis – Normal Operation
T/AST/044 Fault analysis
T/AST/045 Radiological analysis – Fault conditions
T/AST/046 Computer based safety systems
T/AST/048 Organisational capability
T/AST/049 Licensee use of contractors and intelligent customer capability
T/AST/050 Periodic safety reviews (PSRs)
T/AST/051 Guidance on the purpose, scope and content of nuclear safety cases
T/AST/056 Nuclear Lifting Operations
T/AST/057 Design safety assurance
T/AST/058 Human factors integration
T/AST/059 Human Machine Interface
T/AST/060 Procedure Design and Administrative Controls
T/AST/061 Staffing levels and task organisation
T/AST/062 Workplaces and Work Environment
T/AST/063 Human Reliability Analysis
T/AST/064 Allocation of function between human and engineered systems
T/AST/065 Function and content of the Nuclear Baseline
T/AST/072 Function and content of a safety management prospectus
T/AST/076 Construction Assurance
T/AST/077 Procurement of nuclear safety related items or services
T/AST/079 Licensee design authority capability
T/AST/080 Nuclear safety advice and challenge
Updated 2013-03-25