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Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 1, Fourth Edition
K. R. Rao
K. R. Rao
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ASME Press
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This Chapter provides commentary and practical examples on the materials, design, fabrication, installation, and examination requirements for Core Support Structures (CSS) in Section III, Division 1, Subsection NG of the ASME Boiler & Pressure Vessel (ASME B&PV) Code [1]. In addition, commentary is provided on Section XI [2] of the Code, as the rules apply to CSS repair, replacement, examination, and inspection requirements.

The 4th Edition of this Chapter has been updated to reflect the 2010 Edition of the ASME B&PV Code with 2011 Addenda, and includes commentary on the following topics:

• Background on Subsection NG Development

• Definition of Class CS and Jurisdictional Boundaries

• Discussion of Typical Materials Used

• Design By Analysis Rules and Allowable Limits

• Owner's Design Specification and Design Reports

• Fabrication, Installation, and Examination

• Environmental Effects

• Selected Interpretations and Code Cases Applicable to NG

• Improvements and Future Developments in Subsection NG

• Material Degradation Issues

• Compatibility of Subsection NG with Other International Codes

• Realistic Design Loads for Reactor Internals

• Summary of Changes to 2010 Edition of the ASME Code for CSS

11.1 Introduction
11.2 Definition of Core Support Structures (NG-1120)
11.3 Jurisdictional Boundaries (NG-1130)
11.4 Unique Conditions of Serivce
11.5 Materials of Construction (NG-2000)
11.6 Special Materials
11.7 Design (NG-3000)
11.8 Fabrication and Installation (NG-4000)
11.9 Examination (NG-5000)
11.10 Testing
11.11 Overpressure Protection
11.12 Nameplates/Stamping Effects (NG-8000)
11.13 Environmental Effects (NG-3124)
11.14 Special Bolting Requirements (NG-3230)
11.15 Code Cases (NCA-1140)
11.16 Interpretations for Subsection NG
11.17 Elevated Temperature Applications
11.18 Additional Considerations
11.19 Beyond the State-of-the-Art
11.20 References
11.21 Abbreviations and Nomenclature
11.22 Summary of Changes
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