Full Content is available to subscribers

Subscribe/Learn More  >

Hot Rod Statistical Method for Large Break Loss of Coolant Accident With CATHARE

[+] Author Affiliations
Magali Keldenich, Anthony Barbier, Marie-Christine Grouhel, Céline Pignoly

AREVA NP Sas, Paris-la Défense, France

Paper No. ICONE16-48591, pp. 615-622; 8 pages
  • 16th International Conference on Nuclear Engineering
  • Volume 3: Thermal Hydraulics; Instrumentation and Controls
  • Orlando, Florida, USA, May 11–15, 2008
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-4816-7 | eISBN: 0-7918-3820-X
  • Copyright © 2008 by ASME


For nearly 30 years, Areva NP has contributed, with CEA, EDF and IRSN, to the development of CATHARE, one of the most advanced computer codes in the field of thermal-hydraulics calculations on the system-wide scale, with the objective to have at its disposal a high-performance tool, as the basis for the development of best-estimate methods for design and safety studies. At the same time, Areva NP has conceived with EDF a generic safety analysis method called Deterministic Realistic Method (DRM), which has been applied to elaborate and license ECCS evaluation models on the basis of the current CATHARE 2 V1.3L code version. DRM has then been extended by Areva NP with the Hot Rod Statistical Method (HRSM) which adds a statistical treatment of the hot rod-related uncertainties to the deterministic reactor system thermal hydraulic calculation and that can be used with other LB LOCA evaluation models. With the HRSM, the value of the peak cladding temperature envelope with a 95% probability level is determined based on direct Monte Carlo calculations statistically combining three key hot rod parameters randomly varied according to their probability distribution. The final value of the peak cladding temperature is then calculated taking into account an uncertainty calculated using the Bootstrap method. The HRSM is a method, based on CATHARE that is easy to implement as a complement to LB LOCA evaluation model. The large number of direct calculations performed ensures a very high degree of precision when evaluating the peak cladding temperature and the equivalent cladding reacted. The HRSM is currently used and licensed in France for the LB LOCA transients, and is now extended to SB LOCA transients using CATHARE 2 v2.5. An illustrative comparison of HRSM versus DRM typical results for Areva NP 3-loop and 4-loop plants then underlines the significant margins provided by this method.

Copyright © 2008 by ASME



Interactive Graphics


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

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