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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
ATLAS MSLB Accident Analysis Using the SPACE Code
Author(s)
Bum-Soo Youn
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DOI:10.17265/1934-8975/2014.09.016
Affiliation(s)
ABSTRACT
An integral effect test for a MSLB (main stem line break) was performed with the ATLAS (advanced thermal-hydraulic test loop for accident simulation) by KAERI (Korea Atomic Energy Research Institute). A MSLB is defined as a pipe break in the main steam system. This data was used to validate the safety analysis code SPACE (safety and performance analysis code for nuclear power plants). In the test, a double-ended guillotined break of the main steam line was simulated. After steady-state was reached, the test was started by opening the break simulation valves. With the start of the test, the pressure of the secondary system decreased rapidly, and reached the set-point of the LSGP (low steam generator pressure) signal. With the occurrence of the LSGP signal, the main steam
isolation valves were closed. The SIPs (safety injection pumps) were started by the LPP (low pressurizer pressure) signal. In order to validate the SPACE code, a double-ended guillotine break of the main steam line at ATLAS was simulated. Most of the results show
good agreement between the experiment data and the code calculated values.
KEYWORDS
SPACE, MSLB, ATLAS
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