BSI PD 7974-7:2019 – TC
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Tracked Changes. Application of fire safety engineering principles to the design of buildings – Probabilistic risk assessment
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 206 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 158 | Foreword |
| 161 | 1 Scope 2 Normative references 3 Terms and definitions |
| 163 | 4 Design approach |
| 165 | Figure 1 — Flowchart for demonstrating adequate safety of a design |
| 166 | Figure 2 — General flowchart for design assessment using PRA methods |
| 168 | Figure 3 — Consolidated flowchart for a design through PRA |
| 169 | 5 Acceptance criteria Figure 4 — One-dimensional representation of generalized consequence-frequency (FC) |
| 171 | Figure 5 — Generalized consequence-frequency (FC) diagram with indication of tolerability limit and negligible limit |
| 172 | Figure 6 — Flowchart to determine the applicable PRA acceptance criteria for demonstrating adequate safety |
| 173 | Figure 7 — FN diagram (cumulative exceedance frequency versus number of casualties) |
| 183 | 6 Analysis methods |
| 184 | Table 1 — Summary of discussed methods and main characteristics |
| 186 | Figure 8 — Event tree analysis Figure 9 — Fault tree analysis |
| 192 | Figure 10 — Example of typical uncertainty distribution |
| 193 | Figure 11 — Example of Tornado Chart Showing Contribution to Variance |
| 194 | 7 Data collection for PRA |
| 195 | Annex A (informative) Acceptance and tolerability criteria Table A.1 — Individual risk limits Table A.2 — Parameters and valuation of benchmark proportionality constant SCCR1life Annex B (informative) indicative probabilities |
| 196 | Table B.1 — Sprinkler reliability by occupancy based on USA experience Table B.2 — Sprinkler effectiveness (%) by occupancy based on NZ experience Table B.3 — Overall probability of fire starting in various types of occupancy |
| 197 | Table B.4 — Fire growth rate distributions Table B.5 — Fire load energy density for various types of occupancy |
| 198 | Table B.6 — System effectiveness Table B.7 — Extent of Damage in USA Fire Incidents, 1989-1994 |
| 199 | Annex C (informative) Commentary on acceptance criteria Figure C.1 — Acceptability criteria |
| 204 | Bibliography |
