BS ISO 18195:2019
$215.11
Method for the justification of fire partitioning in water cooled nuclear power plants (NPP)
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 78 |
The document provides:
-
guidelines for determining the thermal effects to consider on fire barriers inside a given room;
-
guidelines for determining the global performance of the fire barriers based on standard test characterization;
-
guidelines for assessing the need for additional tests to verify the robustness of the solution.
Requirements of applicable standards, numerical tools validation and verification (V&V), and the expected qualification of fire resistance laboratories are detailed.
The limitations of the method’s applicability and scope are discussed.
The purpose and justification of this document is to describe a new methodology for the verification of the efficiency of fire barriers, which is initially based on a standardized fire resistance test.
The significance of this work relates to the fact that the present methodology will enhance the level of safety by providing more realism to hazards analysis in combination with standardized test data. It completes the standard ISO-fire rating required for justifying the performance.
The most relevant benefit of this method concerns the determination of the global performance of a barrier in a fire of extended duration compared to the classification given by the ISO-fire rating.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 7 | Foreword |
| 8 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms, definitions, symbols and abbreviated terms |
| 10 | 3.1 Terms and definitions |
| 12 | 3.2 Symbols |
| 13 | 3.3 Abbreviated terms 4 Method for justification of nuclear safety fire partitioning: global approach 4.1 Objective of the method 4.1.1 The basis of design: standard fire resistance tests |
| 14 | 4.1.2 Aim, limitations, and precautions |
| 16 | 4.1.3 Minimum requirements concerning the qualification of the method practitioners 4.2 General principle of the method |
| 18 | 4.3 Design of the partitioning: justification of the adequate performance of fire barriers 4.4 Fire barriers and structural elements |
| 19 | 4.5 Overall flowchart (flowchart 1) |
| 20 | 5 Determination of the design basis fire temperature curve (room fire curve) 5.1 General considerations in room fire scenarios 5.1.1 Typical development stages of a compartment fire |
| 21 | 5.2 Defining the design basis fire temperature curve for a room |
| 22 | 5.3 Requirements concerning calculation tools |
| 23 | 5.4 Assumptions and input data for numerical calculations 5.4.1 Fixed automatic fire fighting system (credited or not) |
| 24 | 5.4.2 Modeling assumptions 5.4.3 Characteristics of a room |
| 25 | 5.4.4 Nature of fuels |
| 26 | 5.4.5 Fire scenarios |
| 31 | 5.4.6 Recommended value for pyrolysis rates 5.5 Design basis fire temperature curve calculation process 5.5.1 Data input 5.5.2 Modelling of the fire volume and scenarios 5.5.3 Modelling options |
| 32 | 5.6 Determination of the fire temperature curve |
| 34 | 6 Determination of the performance of fire barriers (performance curve diagram) 6.1 Principles 6.2 Characterization of the performance diagram: global methodology |
| 35 | 6.3 Phase 1: analysis of the standard test |
| 36 | 6.4 Phase 2 branch A: determination by calculation 6.4.1 Study approach |
| 37 | 6.4.2 Selection of representative experimental curves 6.4.3 Calculation tools and choice of the modelling |
| 38 | 6.4.4 Thermal properties of materials |
| 40 | 6.4.5 Plotting performance curves from the reference curves |
| 42 | 6.4.6 Plotting “steady state” curves 6.4.7 Plotting the performance diagram 6.5 Phase 2 BRANCH B: working out a new family system |
| 43 | 6.5.1 Study approach for branch B 6.5.2 Experimental check (step 5B) |
| 44 | 6.6 Phase 2 branch C: specific characterization tests |
| 45 | 6.7 Alternative performance curves 6.8 Performance curve diagram 6.9 Validation of the models 7 Uncertainty and sensitivity |
| 46 | 7.1 Use of average values (zone model vs. CFD model) 7.2 Uncertainties and sensitivities in fire temperature curve calculation 7.3 Uncertainties and sensitivities in the performance curve process |
| 48 | Annex A (informative) Spreading criterion PFG/PFL (examples) |
| 50 | Annex B (informative) Value examples for fire scenarios |
| 59 | Annex C (informative) Loss of classification criteria : examples |
| 60 | Annex D (informative) Example of performance diagram of a cable fire-wrap |
| 73 | Bibliography |
Related products
-
BS ISO 18195:2019
Method for the justification of fire partitioning in water cooled nuclear power plants (NPP) Published…
