Modeling of two-phase flow instabilities during startup transients utilizing RAMONA-4B methodology

Conference · Tue Oct 01 00:00:00 EDT 1996

OSTI ID:385575

Paniagua, J; Rohatgi, U S; Prasad, V

RAMONA-4B code is currently under development for simulating thermal hydraulic instabilities that can occur in Boiling Water Reactors (BWRs) and the Simplified Boiling Water Reactor (SBWR). As one of the missions of RAMONA-4B is to simulate SBWR startup transients, where geysering or condensation-induced instability may be encountered, the code needs to be assessed for this application. This paper outlines the results of the assessments of the current version of RAMONA-4B and the modifications necessary for simulating the geysering or condensation-induced instability. The test selected for assessment are the geysering tests performed by Prof Aritomi (1993).

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: Nuclear Regulatory Commission, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 385575
• Report Number(s): BNL-NUREG--63326; CONF-961105--14; ON: DE96015063
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
22 GENERAL STUDIES OF NUCLEAR REACTORS
BWR TYPE REACTORS
CIRCULATING SYSTEMS
FLOW MODELS
INSTABILITY
R CODES
REACTOR START-UP
TRANSIENTS
TWO-PHASE FLOW
UNSTEADY FLOW