Methods for Safety Assessment of Geological Disposal Facilities for Radioactive Waste

Foreword......Page 5
Acknowledgements......Page 6
Table of contents......Page 7
Safety assessment and safety case flowcharts......Page 11
System description and scenarios......Page 12
Modelling strategy......Page 13
Treatment of uncertainties......Page 14
Regulatory issues......Page 15
1. Introduction......Page 19
2. Overall regulatory perspective......Page 21
3.1 Definitions......Page 23
3.2 The safety case as context for safety assessment......Page 24
3.3 Scope of safety assessment......Page 25
3.6 Evolution of the safety assessment and the safety case over time......Page 26
3.8 Safety assessment results and communication......Page 27
3.9 Regulatory perspective......Page 28
4.1 Development of assessment strategy flowcharts......Page 29
4.2 Generic assessment strategy flowchart......Page 30
4.3 Regulatory perspective......Page 34
5.2 System description: initial state and evolution......Page 35
5.3 Derivation of scenarios......Page 37
5.4 Structuring scientific knowledge and identifying safety-relevant phenomena and uncertainties......Page 38
5.5 Scenario probabilities......Page 39
5.6 Regulatory perspective......Page 41
6.2 Process-level models......Page 45
6.3 Integrated or system-level modelling......Page 46
6.5 Data gathering and management......Page 48
6.6 Model qualification......Page 49
6.7 Regulatory perspective......Page 50
7.2 Classification of indicators......Page 53
7.3 Safety indicators......Page 54
7.5 Safety function indicators......Page 55
7.6 Reference values......Page 56
7.8 Transferability......Page 57
7.9 Regulatory perspective......Page 58
8.1 Classification of uncertainty......Page 61
8.2 Strategies for treating uncertainty......Page 62
8.4 Regulatory perspectives......Page 63
9. Conclusions and recommendations......Page 65
10. References......Page 67
11.1 Introduction and definitions......Page 71
11.2 The safety case as context for safety assessment......Page 73
11.3 The scope and basis of safety assessment......Page 77
11.4 The safety assessment and safety case in repository development......Page 79
11.5 Interpretation and presentation of safety assessment results......Page 82
11.6 Conclusions......Page 83
11.7 References......Page 84
Abstract......Page 87
12.2 Methodology......Page 88
12.3 Conclusions......Page 103
12.4 References......Page 104
13.1 Introduction......Page 117
13.2 History and recent developments......Page 118
13.3 Place and purpose of system description and scenario development in the safety strategy and safety case......Page 122
13.4 System description: Initial state and evolution......Page 125
13.5 Derivation of scenarios......Page 131
13.6  The regulator’s perspective......Page 143
13.7 Conclusions......Page 145
13.8 References......Page 147
14.1 Introduction......Page 151
14.2 Methodology......Page 152
14.3 Types of models and modelling strategy......Page 153
14.4 Process-level modelling......Page 155
14.5 Integrated or system-level modelling......Page 156
14.6 Advances in tools......Page 158
14.7 Data selection......Page 160
14.8 Model qualification......Page 162
14.9 Conclusions......Page 164
14.10 References......Page 165
Abstract......Page 167
15.2 Methodology......Page 168
15.3 Conclusions......Page 187
15.4 References......Page 188
16.1 Introduction......Page 197
16.2 Sources and classification of uncertainties......Page 201
16.4 Description and quantification of uncertainties......Page 204
16.5 Impacts of uncertainties......Page 207
16.6 Mathematical techniques......Page 210
16.7 Conclusions......Page 212
16.8 References......Page 214
17.1 Introduction......Page 223
17.3 Safety concept......Page 225
17.4 Assessment strategy......Page 226
17.5 Indicators and criteria......Page 229
17.6 System description......Page 231
17.7 System evolution and scenarios......Page 232
17.8 Modelling strategy......Page 236
17.10 References......Page 238