ASME NTB 3 2020
$98.04
ASME – NTB – 3 -2020 Gap Analysis for Addressing Adequacy or Optimization of ASME Section III, Division 5 Rules for Metallic Components
| Published By | Publication Date | Number of Pages |
| ASME | 2020 | 48 |
The goal of this publication is to provide an assessment of an integrated list of 39 issues that have been assembled from three prior reviews of various forerunners of ASME Boiler and Pressure Vessel Code (“BPVC”), Section III Rules for Construction of Nuclear Facility Components, Division 5 High Temperature Reactors, Code rules for metallic coolant boundary components and core supports. The focus of the assessment has been on whether the current BPVC Section III, Division 5 Code rules provide reasonable assurance of adequate protection against identified structural failure modes with respect to these issues.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Table of Contents |
| 8 | LIST OF TABLES |
| 9 | Foreword |
| 10 | Executive Summary |
| 15 | Abbreviations and Acronyms |
| 16 | 1 RELATING TO STRAIN, DEFORMATION, AND FATIGUE LIMITS 1.1 Issue I. 1 – Identify Areas Where Appendix T Rules are not Met 1.1.1 Summary 1.1.2 General Assessment 1.1.3 Material Specific Remarks 1.1.4 Action Required 1.1.5 Conclusion |
| 17 | 1.2 Issue I. 2 – Simplified Bounds for Creep Ratcheting 1.2 1.2.1 Summary 1.2.2 General Assessment 1.2.3 Material Specific Remarks 1.2.4 Action Required 1.2.5 Conclusion 1.3 Issue I. 3 – Strain and Deformation Limits at Elevated-Temperature 1.3 1.3.1 Summary |
| 18 | 1.3.2 General Assessment 1.3.3 Material Specific Remarks 1.3.4 Action Required 1.3.5 Conclusion 1.4 Issue I. 4 – Creep-Rupture and Fatigue Damage 1.4 1.4.1 Summary 1.4.2 General Assessment 1.4.3 Material Specific Remarks 1.4.4 Action Required |
| 19 | 1.4.5 Conclusion 1.5 Issue I. 5 – Creep-Fatigue Analysis of Class 2 and 3 Piping 1.5 1.5.1 Summary 1.5.2 General Assessment 1.5.3 Material Specific Remarks 1.5.4 Action Required |
| 20 | 1.5.5 Conclusion 1.6 Issue I. 6 – Elastic Follow-Up 1.6 1.6.1 Summary 1.6.2 General Assessment 1.6.3 Material Specific Remarks 1.6.4 Action Required 1.6.5 Conclusion |
| 21 | 1.7 Issue I. 7 – Plastic Strain Concentration Factors / Lack of Conservatism in Code Rules for Simplified Fatigue Evaluation Based on Plastic Strain Concentration Factors 1.7 1.7.1 Summary 1.7.2 General Assessment 1.7.3 Material Specific Remarks 1.7.4 Actions Required 1.7.5 Conclusion 1.8 Issue I. 8 – Thermal Striping 1.8 1.8.1 Summary |
| 22 | 1.8.2 General Assessment 1.8.3 Material Specific Remarks 1.8.4 Action Required 1.8.5 Conclusion 1.9 Issue I. 9 – Use of Simplified Bounding Rules at Discontinuities 1.9 1.9.1 Summary 1.9.2 General Assessment 1.9.3 Material Specific Remarks 1.9.4 Action Required |
| 23 | 1.9.5 Conclusion 1.10 Issue I. 10 – Steam Generator Tubesheet Evaluation 1.10 1.10.1 Summary 1.10.2 General Assessment 1.10.3 Material Specific Remarks 1.10.4 Actions Required 1.10.5 Conclusion 1.11 Issue I. 11 – Creep Buckling Under Axial Compression – Design Margins 1.11 1.11.1 Summary 1.11.2 General Assessment |
| 24 | 1.11.3 Material Specific Remarks 1.11.4 Action Required 1.11.5 Conclusion |
| 25 | 2 RELATING TO MATERIAL PROPERTIES 2.1 Issue II. 1 – Creep-Rupture Damage due to Forming and Welding 2.1.1 Summary 2.1.2 General Assessment 2.1.3 Material Specific Remarks 2.1.4 Action Required 2.1.5 Conclusion 2.2 Issue II. 2 – Material Acceptance Criteria for Elevated-Temperature 2.2 2.2.1 Summary |
| 26 | 2.2.2 General Assessment 2.2.3 Material Specific Remarks 2.2.4 Action Required 2.2.5 Conclusion 2.3 Issue II. 3 – Elevated-Temperature Data Base for Mechanical Properties 2.3 2.3.1 Summary |
| 27 | 2.3.2 General Assessment 2.3.3 Material Specific Remarks 2.3.4 Action Required 2.3.5 Conclusion 2.4 Issue II. 4 – Thermal Aging Effects 2.4 2.4.1 Summary |
| 28 | 2.4.2 General Assessment 2.4.3 Material Specific Remarks 2.4.4 Action Required 2.4.5 Conclusion 2.5 Issue II. 5 – Lack of a Design Methodology for Modified 9Cr-1Mo Steel 2.5 2.5.1 Summary 2.5.2 General Assessment |
| 29 | 2.5.3 Material Specific Remarks 2.5.4 Actions Required 2.5.5 Conclusion 2.6 Issue II. 6 – Use of Average vs. Minimum Material Properties in Design 2.6 2.6.1 Summary 2.6.2 General Assessment 2.6.3 Material Specific Remarks 2.6.4 Actions Required 2.6.5 Conclusion |
| 30 | 2.7 Issue II. 7 – Material Property Representation for Inelastic Analysis / Lack of Inelastic Design Procedures for Piping 2.7 2.7.1 Summary 2.7.2 General Assessment 2.7.3 Material Specific Remarks 2.7.4 Actions Required 2.7.5 Conclusion |
| 31 | 3 Welds 3.1 Issue III. 1 – Transition Joints 3.1.1 Summary 3.1.2 General Assessment 3.1.3 Material Specific Remarks 3.1.4 Required Actions 3.1.5 Conclusions 3.2 Issue III. 2 – Weld Residual Stresses 3.2 3.2.1 Summary |
| 32 | 3.2.2 General Assessment 3.2.3 Material Specific Remarks 3.2.4 Action required 3.2.5 Conclusion 3.3 Issue III. 3 – Evaluation of Weldments 3.3 3.3.1 Summary |
| 33 | 3.3.2 General Assessment 3.3.3 Material Specific Remarks 3.3.4 Action Required 3.3.5 Conclusion |
| 34 | 4 MULTIAXIALITY 4.1 Issue IV. 1 – Uncertainty of Multiaxial Stress State Effects 4.1.1 Summary 4.1.2 General Assessment 4.1.3 Material Specific Remarks 4.1.4 Actions Required 4.1.5 Conclusion 4.2 Issue IV. 2 – Uncertainty of Non-Radial (Non-Proportional) Loading 4.2 4.2.1 Summary 4.2.2 General Assessment 4.2.3 Material Specific Remarks 4.2.4 Actions Required |
| 35 | 4.2.5 Conclusion 4.3 Issue IV. 3 – Notch Weakening / Lack of Understanding / Validation of Notch Weakening Effects 4.3 4.3.1 Summary 4.3.2 General Assessment 4.3.3 Material Specific Remarks 4.3.4 Actions Required 4.3.5 Conclusion |
| 36 | 5 COMPONENT AND CORE SUPPORTS 5.1 Issue V. 1 – Rules for Component Supports at Elevated-Temperature 5.1.1 Summary 5.1.2 General Assessment 5.1.3 Material Specific Remarks 5.1.4 Action Required 5.1.5 Conclusion 5.2 Issue V. 2 – Design Criteria for Elevated-Temperature Core Support Structures and Welds 5.2 5.2.1 Summary |
| 37 | 5.2.2 General Assessment 5.2.3 Material Specific Remarks 5.2.4 Action Required 5.2.5 Conclusion |
| 38 | 6 MISCELLANEOUS ISSUES 6.1 Issue VI. 1 – Are Limits of Case N-253 for Elevated-Temperature Class 2 and 3 Components Met? 6.1.1 Summary 6.1.2 General Assessment 6.1.3 Material Specific Remarks 6.1.4 Action Required 6.1.5 Conclusion 6.2 Issue VI. 2 – Degradation Effect of Small Cyclic Stresses 6.2 6.2.1 Summary 6.2.2 General Assessment |
| 39 | 6.2.3 Material Specific Remarks 6.2.4 Actions Required 6.2.5 Conclusion 6.3 Issue VI. 3 – Creep-Induced Failures at Temperatures Below Code Case N-47 Limits 6.3 6.3.1 Summary 6.3.2 General Assessment 6.3.3 Material Specific Remarks 6.3.4 Actions Required 6.3.5 Conclusion 6.4 Issue VI. 4 – Lack of Understanding / Validation of Effects of Short Term Overload Events on Subsequent Material Properties. 6.4 6.4.1 Summary |
| 40 | 6.4.2 General Assessment 6.4.3 Material Specific Remarks 6.4.4 Actions Required 6.4.5 Conclusion 6.5 Issue VI. 5 – Elevated-Temperature Seismic Effects / Lack of Validated Rules / Guidelines to Account for Seismic Effects at Elevated Temperature 6.5 6.5.1 Summary |
| 41 | 6.5.2 General Assessment 6.5.3 Material Specific Remarks 6.5.4 Actions Required 6.5.5 Conclusion 6.6 Issue VI. 6 – Need for Thermal Stratification Guidelines 6.6 6.6.1 Summary 6.6.2 General Assessment 6.6.3 Material Specific Remarks 6.6.4 Actions Required 6.6.5 Conclusion |
| 42 | 7 ISSUES OUTSIDE OF BPVC Section III, DIVISION 5 SCOPE 7.1 Issue VII. 1 – Design Loading Combinations 7.2 Issue VII. 2 – Mass Transfer Effects 7.3 Issue VII. 3 – Environmental Effects 7.4 Issue VII. 4 – Irradiation Effects 7.5 Issue VII. 5 – Fracture Toughness Criteria 7.6 Issue VII. 6 – Basis for Leak-before-Break at Elevated Temperatures 7.7 Issue VII. 7 – Lack of Flaw Assessment Procedures |
| 43 | 8 SUMMARY AND COMMENTARY |
| 45 | References |
