Oregon State University has hosted an International Atomic Energy Agency (IAEA)
International Collaborative Standard Problem (ICSP) through testing conducted on the
Multi-Application Small Light Water (MASLWR) facility. The MASLWR facility features
a full-time natural circulation loop in the primary vessel and a unique pressure suppression
device for accident scenarios. Automatic depressurization system (ADS) lines connect
the primary vessel to a high pressure containment (HPC) which dissipates steam heat
through a heat transfer plate thermally connected to another vessel with a large cool
water inventory. This feature drew the interest of the IAEA and an ICSP was developed
where a loss of feedwater to the steam generators prompted a depressurization of the
primary vessel via a blowdown through the ADS lines.
The purpose of the ICSP is to evaluate the applicability of thermal-hydraulic computer
codes to unique experiments usually outside of the validation matrix of the code
itself. RELAP5-3D 2:4:2 was chosen to model the ICSP. RELAP5-3D is a best-estimate
code designed to simulate transient
fluid and thermal behavior in light water reactors.
Modeling was conducted in RELAP5-3D to identify the strengths and weaknesses of the
code in predicting the experimental trends of the IAEA ICSP. This extended to nodalization
sensitivity studies, an investigation of built-in models and heat transfer boundary
conditions. Besides a qualitative analysis, a quantitative analysis method was also performed. / Graduation date: 2013
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/30438 |
| Date | 13 June 2012 |
| Creators | Bowser, Christopher Jordan |
| Contributors | Woods, Brian G. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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