RELAP5 Analysis of OECDNEA ROSA Project Experiment Simulating a PWR Loss-of-Feedwater Transient with High-Power Natural Circulation
Joint Authors
Asaka, Hideaki
Nakamura, Hideo
Takeda, Takeshi
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-03-04
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
A ROSA/LSTF experiment was conducted for OECD/NEA ROSA Project simulating a PWR loss-of-feedwater (LOFW) transient with specific assumptions of failure of scram that may cause natural circulation with high core power and total failure of high pressure injection system.
Auxiliary feedwater (AFW) was provided to well observe the long-term high-power natural circulation.
The core power curve was obtained from a RELAP5 code analysis of PWR LOFW transient without scram.
The primary and steam generator (SG) secondary-side pressures were maintained, respectively, at around 16 and 8 MPa by cycle opening of pressurizer (PZR) power-operated relief valve and SG relief valves for a long time.
Large-amplitude level oscillation occurred in SG U-tubes for a long time in a form of slow fill and dump while the two-phase natural circulation flow rate gradually decreased with some oscillation.
RELAP5 post-test analyses were performed to well understand the observed phenomena by employing a fine-mesh multiple parallel flow channel representation of SG U-tubes with a Wallis counter-current flow limiting correlation at the inlet of U-tubes.
The code, however, has remaining problems in proper predictions of the oscillative primary loop flow rate and SG U-tube liquid level as well as PZR liquid level.
American Psychological Association (APA)
Takeda, Takeshi& Asaka, Hideaki& Nakamura, Hideo. 2012. RELAP5 Analysis of OECDNEA ROSA Project Experiment Simulating a PWR Loss-of-Feedwater Transient with High-Power Natural Circulation. Science and Technology of Nuclear Installations،Vol. 2012, no. 2012, pp.1-15.
https://search.emarefa.net/detail/BIM-511331
Modern Language Association (MLA)
Takeda, Takeshi…[et al.]. RELAP5 Analysis of OECDNEA ROSA Project Experiment Simulating a PWR Loss-of-Feedwater Transient with High-Power Natural Circulation. Science and Technology of Nuclear Installations No. 2012 (2012), pp.1-15.
https://search.emarefa.net/detail/BIM-511331
American Medical Association (AMA)
Takeda, Takeshi& Asaka, Hideaki& Nakamura, Hideo. RELAP5 Analysis of OECDNEA ROSA Project Experiment Simulating a PWR Loss-of-Feedwater Transient with High-Power Natural Circulation. Science and Technology of Nuclear Installations. 2012. Vol. 2012, no. 2012, pp.1-15.
https://search.emarefa.net/detail/BIM-511331
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-511331