ROSALSTF Tests and RELAP5 Posttest Analyses for PWR Safety System Using Steam Generator Secondary-Side Depressurization against Effects of Release of Nitrogen Gas Dissolved in Accumulator Water
Joint Authors
Ohnuki, Akira
Kanamori, Daisuke
Ohtsu, Iwao
Takeda, Takeshi
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-06-06
Country of Publication
Egypt
No. of Pages
15
Abstract EN
Two tests related to a new safety system for a pressurized water reactor were performed with the ROSA/LSTF (rig of safety assessment/large scale test facility).
The tests simulated cold leg small-break loss-of-coolant accidents with 2-inch diameter break using an early steam generator (SG) secondary-side depressurization with or without release of nitrogen gas dissolved in accumulator (ACC) water.
The SG depressurization was initiated by fully opening the depressurization valves in both SGs immediately after a safety injection signal.
The pressure difference between the primary and SG secondary sides after the actuation of ACC system was larger in the test with the dissolved gas release than that in the test without the dissolved gas release.
No core uncovery and heatup took place because of the ACC coolant injection and two-phase natural circulation.
Long-term core cooling was ensured by the actuation of low-pressure injection system.
The RELAP5 code predicted most of the overall trends of the major thermal-hydraulic responses after adjusting a break discharge coefficient for two-phase discharge flow under the assumption of releasing all the dissolved gas at the vessel upper plenum.
American Psychological Association (APA)
Takeda, Takeshi& Ohnuki, Akira& Kanamori, Daisuke& Ohtsu, Iwao. 2016. ROSALSTF Tests and RELAP5 Posttest Analyses for PWR Safety System Using Steam Generator Secondary-Side Depressurization against Effects of Release of Nitrogen Gas Dissolved in Accumulator Water. Science and Technology of Nuclear Installations،Vol. 2016, no. 2016, pp.1-15.
https://search.emarefa.net/detail/BIM-1118600
Modern Language Association (MLA)
Takeda, Takeshi…[et al.]. ROSALSTF Tests and RELAP5 Posttest Analyses for PWR Safety System Using Steam Generator Secondary-Side Depressurization against Effects of Release of Nitrogen Gas Dissolved in Accumulator Water. Science and Technology of Nuclear Installations No. 2016 (2016), pp.1-15.
https://search.emarefa.net/detail/BIM-1118600
American Medical Association (AMA)
Takeda, Takeshi& Ohnuki, Akira& Kanamori, Daisuke& Ohtsu, Iwao. ROSALSTF Tests and RELAP5 Posttest Analyses for PWR Safety System Using Steam Generator Secondary-Side Depressurization against Effects of Release of Nitrogen Gas Dissolved in Accumulator Water. Science and Technology of Nuclear Installations. 2016. Vol. 2016, no. 2016, pp.1-15.
https://search.emarefa.net/detail/BIM-1118600
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1118600