Report a Safety Concern
Search

The U.S. Nuclear Regulatory Commission is in the process of rescinding or revising guidance and policies posted on this webpage in accordance with Executive Order 14151 Ending Radical and Wasteful Government DEI Programs and Preferencing, and Executive Order 14168 Defending Women From Gender Ideology Extremism and Restoring Biological Truth to the Federal Government. In the interim, any previously issued diversity, equity, inclusion, or gender-related guidance on this webpage should be considered rescinded that is inconsistent with these Executive Orders.

Home NRC Library Document Collections NUREG-Series Publications Publications Resulting from International Agreements

Analysis of the Critical Flow Model in TRAC-BF1 (NUREG/IA-0160)

On this page:

Download complete document

Publication Information

Date Published: May 1999

Prepared by:
M. Gómez, E. Valero, I. E. Parra

Department of Applied Mathematics and Statistics
Universidad Politécnica de Madrid
Spain

Prepared as part of:
The Agreement on Research Participation and Technical Exchange
under the International Code Application and Maintenance Program (CAMP)

Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

Availability Notice

Abstract

Five Marviken Tests are modelled using TRAC-BF1. The code simulations are compared to Marviken data so as to analyse the capacity of TRAC-BF1 to reproduce subcooled and saturated blowdowns under critical conditions. Consequently, the critical flow model included in TRAC-BF1 will be validated.

Owing to the quasi-steady flow arising through the waste pipe, conserved quantities are useful to check the results accuracy. The influence of mesh refinement is also analysed.

Conclusions indicate that critical conditions must be imposed at the adequate sections to assure the calculations admissibility. However, the critical flow model introduces intrinsic errors that cannot be eliminated by means of mesh refinement.

Page Last Reviewed/Updated Tuesday, March 09, 2021