Published 2010 | Version v1
Journal article Metadata-only

Numerical Investigation of Startup Instabilities in Parallel-Channel Natural Circulation Boiling Systems

Creators

  • 1. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039 (India)

Description

The behaviour of a parallel-channel natural circulation boiling water reactor under a low-pressure low-power startup condition has been studied numerically (using RELAP5) and compared with its scaled model. The parallel-channel RELAP5 model is an extension of a single-channel model developed and validated with experimental results. Existence of in-phase and out-of-phase flashing instabilities in the parallel-channel systems is investigated through simulations under equal and unequal power boundary conditions in the channels. The effect of flow resistance on Type-I oscillations is explored. For nonidentical condition in the channels, the flow fluctuations in the parallel-channel systems are found to be out-of-phase

Additional details

Publishing Information

Journal Title
Science and Technology of Nuclear Installations (Print)
Journal Issue
V. 2010(2010
Journal Page Range
p. 8
ISSN
1687-6075

INIS

Country of Publication
Egypt
Country of Input or Organization
Egypt
INIS RN
41079118
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
BOUNDARY CONDITIONS; BWR TYPE REACTORS; EXPERIMENTAL CHANNELS; NATURAL CONVECTION; PARALLEL PROCESSING; REACTOR START-UP
Descriptors DEC
CONVECTION; ENERGY TRANSFER; ENRICHED URANIUM REACTORS; HEAT TRANSFER; MASS TRANSFER; POWER REACTORS; PROGRAMMING; REACTOR CHANNELS; REACTOR COMPONENTS; REACTOR EXPERIMENTAL FACILITIES; REACTORS; START-UP; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS