Published June 1992 | Version v1
Report Metadata-only

The influence of two different discretization schemes of the momentum equations of TRAC-BF1 on the code predictions

Creators

  • 1. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Lab. for Thermal-Hydraulics

Description

Recent work with TRAC-BF1 at the Thermal-Hydraulic Laboratory at PSI has shown that under certain conditions, the code runs into severe problems. This is seen to be the case when single-phase (α=1.0) steam is convected into single-phase (α=0) liquid, and shows up both when one is modelling injection of steam into a pool of stagnant water and also during the analysis of large-break separate effect tests eg. TLTA. The origin of these problems has been traced to the way the wall friction is defined by cell-length averaging of the phasic mass-flux at the cell-boundaries of the volume. In this work, we shall report on these problems and suggest one way of solving them by modifying the evaluation of some terms of the 1-Dimensional (1D) momentum equations. (author) 6 figs., 7 refs

Availability note (English)

Available from ENET, Administration und Versand, Postfach 142, CH-3000 Bern 6, Switzerland.

Additional details

Publishing Information

Imprint Pagination
13 p.
Report number
ENET--8900275/8

Conference

Title
First code application and maintenance program (CAMP) meeting.
Dates
24-26 Jun 1992.
Place
Villigen (Switzerland).

INIS

Country of Publication
Switzerland
Country of Input or Organization
Switzerland
INIS RN
24075235
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S42: ENGINEERING;
Resource subtype / Literary indicator
Conference, Numerical Data, Non-conventional Literature
Descriptors DEI
BWR TYPE REACTORS; COMPUTERIZED SIMULATION; HYDRAULICS; ONE-DIMENSIONAL CALCULATIONS; R CODES; STEAM; T CODES; THEORETICAL DATA; TRANSIENTS; WATER
Descriptors DEC
COMPUTER CODES; DATA; ENRICHED URANIUM REACTORS; HYDROGEN COMPOUNDS; INFORMATION; NUMERICAL DATA; OXYGEN COMPOUNDS; POWER REACTORS; REACTORS; SIMULATION; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS