Single angle members have been rarely used as supporting structures in nuclear power plant because they are open sections which have significantly reduced capacities when considered in comparison to closed sections, and have weakness for twisting load such as local torsion caused by loading eccentricity of geometric center and shear center. However, in APR1400 (Advanced Power Reactor 1400 MW-class in Korea), the extended application of single angle members for supporting structures of small bore piping systems is considered to enhance the constructability and economics of plant. Furthermore, although it is general guideline for support design in APR1400 that supporting structures for equipment should be directly welded to embedded plates or steel structures in buildings as far as possible, in the case of small bore piping system, for the low level priority of construction in site, supporting steel structures for small bore piping could not be evitable to be welded onto the CEA (Concrete Expansion Anchor) plate. Per the ACI 318, ACI 349 and ACI 355.2, most CEA plate designs and anchor bolt load determinations are now based on finite element models that many applications have been individually made for CEA plates. If single angle members are attached onto these plates, integrated finite element models should be developed and analyzed in detail accroding to NRC IEB 79-02. Such a detailed analysis may appear to be excessive to small bore pipe supports which have diverse design materials and frequently subjected to field changes requiring rapid revision. Consideration should be given to reviewing current practices and reducing the level of effort being used for the integrated analysis of support and CEA plate by developing consensus standard regarding reasonable support and CEA plate designs. In this paper, allowable piping loads for single angle members such as L2×2×1/4, L2-1/2×2-1/2×1/4, L3×3×3/8, and L4×4×1/2 welded on the 4-bolt CEA assembly are derived and reviewed for general use for small bore pipe support design, and L2-1/2×2-1/2×1/4 and L3×3×3/8 welded onto 4-bolt (3/8″Φ sleeve type) CEA plate (1/2″×9″×9″) are recommended as standard small bore pipe supports with post-installed anchor system in APR1400.
Skip Nav Destination
16th International Conference on Nuclear Engineering
May 11–15, 2008
Orlando, Florida, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4814-0
PROCEEDINGS PAPER
Allowable Load Derivation of Single Angle Members for Small Bore Pipe Supports Welded on 4-Bolt CEA Plate in APR1400 Available to Purchase
Joon-Ho Lee,
Joon-Ho Lee
Korea Power Engineering Company, Inc., Yongin, South Korea
Search for other works by this author on:
Hee-Cheon Choo,
Hee-Cheon Choo
Korea Power Engineering Company, Inc., Yongin, South Korea
Search for other works by this author on:
Jae-Hwan Bae
Jae-Hwan Bae
Korea Power Engineering Company, Inc., Yongin, South Korea
Search for other works by this author on:
Joon-Ho Lee
Korea Power Engineering Company, Inc., Yongin, South Korea
Hee-Cheon Choo
Korea Power Engineering Company, Inc., Yongin, South Korea
Jae-Hwan Bae
Korea Power Engineering Company, Inc., Yongin, South Korea
Paper No:
ICONE16-48325, pp. 93-100; 8 pages
Published Online:
June 24, 2009
Citation
Lee, J, Choo, H, & Bae, J. "Allowable Load Derivation of Single Angle Members for Small Bore Pipe Supports Welded on 4-Bolt CEA Plate in APR1400." Proceedings of the 16th International Conference on Nuclear Engineering. Volume 1: Plant Operations, Maintenance, Installations and Life Cycle; Component Reliability and Materials Issues; Advanced Applications of Nuclear Technology; Codes, Standards, Licensing and Regulatory Issues. Orlando, Florida, USA. May 11–15, 2008. pp. 93-100. ASME. https://doi.org/10.1115/ICONE16-48325
Download citation file:
12
Views
Related Proceedings Papers
Related Articles
A New Multiaxial Fatigue Life Prediction Model Under Proportional and Nonproportional Loading
J. Eng. Mater. Technol (April,2010)
A Finite Element Analysis for Unbonded Flexible Risers Under Torsion
J. Offshore Mech. Arct. Eng (November,2008)
The Refined Theory of One-Dimensional Quasi-Crystals in Thick Plate Structures
J. Appl. Mech (May,2011)
Related Chapters
Subsection NCA—General Requirements for Division 1 and Division 2
Companion Guide to the ASME Boiler & Pressure Vessel Code, Volume 1, Second Edition
Subsection NCA—General Requirements for Division 1 and Division 2
Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 1, Third Edition
Subsection NCA—General Requirements for Division 1 and Division 2
Companion Guide to the ASME Boiler & Pressure Vessel Codes, Volume 1 Sixth Edition