0

Full Content is available to subscribers

Subscribe/Learn More  >

Benchmarking of Pressurized Water Reactor Blowdown Analysis Using RELAP5 and ANSYS

[+] Author Affiliations
Olivia Luke, Heqin Xu, Tamas Liszkai

NuScale Power, LLC, Corvallis, OR

Paper No. PVP2015-45722, pp. V004T04A057; 9 pages
doi:10.1115/PVP2015-45722
From:
  • ASME 2015 Pressure Vessels and Piping Conference
  • Volume 4: Fluid-Structure Interaction
  • Boston, Massachusetts, USA, July 19–23, 2015
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5697-0
  • Copyright © 2015 by ASME

abstract

Mechanical design bases for pressurized water reactors typically include various transients involving line breaches or valve actuations in high energy pressure boundaries. Due to the rapidly changing thermal hydraulic conditions and the resulting dynamic mechanical loads caused by the depressurization wave, blowdown events require special treatment from a mechanical analysis standpoint in order to meet the requirements of 10 CFR 50 Appendix A, General Design Criteria 4 and 14. Specifically, the fluid-structure interaction (FSI) is important for accurate prediction of dynamic mechanical loads, and must be evaluated to ensure that a reasonably bounding loading profile can be assured for all components, reactor vessel internals, and supports subject to the blowdown event.

This paper proposes a methodology to evaluate dynamic responses during blowdown events for mechanical design, using the code RELAP5-3D to simulate the thermal hydraulic conditions and subsequently the code ANSYS to simulate the FSI and resulting dynamic mechanical loads. Results from the German Heissdampf Reactor (HDR) blowdown experiments are used for methodology benchmarking. HDR benchmarking cases are studied to demonstrate that the capabilities of the thermal-hydraulic code RELAP5-3D and the multi-physics code ANSYS are sufficient to analyze high energy pressure boundary breaches. Thermal hydraulic boundary conditions are generated first using a RELAP5-3D model of the HDR break location for the selected study cases. The resulting time history data from RELAP5-3D are utilized in the ANSYS model, which is comprised of structural and acoustic elements. The use of essential, natural and acoustic impedance boundary conditions is investigated to determine the optimal method for simulating the fluid-structure interaction. Simulated displacements, strains, and differential pressure on the reactor vessel and reactor vessel internals are in excellent agreement with the experimental data for the time period of interest.

Copyright © 2015 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In