In CANDU reactor one of the two reactor shutdown systems is the liquid poison injection system which injects the highly pressurized liquid neutron poison into the moderator tank via small holes on the nozzle pipes. To ensure the safe shutdown of a reactor it is necessary for the poison curtains generated by jets provide quick, and enough negative reactivity to the reactor during the early stage of the accident. In order to produce the neutron cross section necessary to perform this work, the poison concentration distribution during the transient is necessary. In this study, a set of models for analyzing the transient poison concentration induced by this high pressure poison injection jet activated upon the reactor trip in a CANDU-6 reactor moderator tank has been developed and used to generate the poison concentration distribution of the poison curtains induced by the high pressure jets injected into the vacant region between the pressure tube banks. The poison injection rate through the jet holes drilled on the nozzle pipes is obtained by a 1-D transient hydrodynamic code called, ALITRIG, and this injection rate is used to provide the inlet boundary condition to a 3-D CFD model of the moderator tank based on CFX4.3, a CFD code, to simulate the formation of the poison jet curtain inside the moderator tank. For validation, an attempt was made to validate this model against a poison injection experiment performed at BARC. As conclusion this set of models is judged to be appropriate.
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10th International Conference on Nuclear Engineering
April 14–18, 2002
Arlington, Virginia, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-3597-9
PROCEEDINGS PAPER
A CFD Model for High Pressure Liquid Poison Injection for CANDU-6 Shutdown System No. 2
Bo Wook Rhee,
Bo Wook Rhee
Korea Atomic Energy Research Institute, Daejeon, Korea
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Chang Joon Jeong,
Chang Joon Jeong
Korea Atomic Energy Research Institute, Daejeon, Korea
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Hye Jeong Yun,
Hye Jeong Yun
Choongnam National University, Daejeon, Korea
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Dong Soon Jang
Dong Soon Jang
Choongnam National University, Daejeon, Korea
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Bo Wook Rhee
Korea Atomic Energy Research Institute, Daejeon, Korea
Chang Joon Jeong
Korea Atomic Energy Research Institute, Daejeon, Korea
Hye Jeong Yun
Choongnam National University, Daejeon, Korea
Dong Soon Jang
Choongnam National University, Daejeon, Korea
Paper No:
ICONE10-22168, pp. 195-203; 9 pages
Published Online:
March 4, 2009
Citation
Rhee, BW, Jeong, CJ, Yun, HJ, & Jang, DS. "A CFD Model for High Pressure Liquid Poison Injection for CANDU-6 Shutdown System No. 2." Proceedings of the 10th International Conference on Nuclear Engineering. 10th International Conference on Nuclear Engineering, Volume 3. Arlington, Virginia, USA. April 14–18, 2002. pp. 195-203. ASME. https://doi.org/10.1115/ICONE10-22168
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