Abstract
A high pressure test (0.42 MPa) on the reflood phenomena was performed with the CCTF. The result of the test was compared with the experimental result of the base case test (0.2 MPa). (1) The overall flow characteristics in the high pressure test were qualitatively similar to that of the base case test. Any qualitatively different phenomena were not recognized during reflood phase. This indicates that it is reasonable to utilize the physical reflood model developed from the result of the base case test to the high pressure condition at least up to 0.42 MPa for prediction of reflood behavior of PWRs. (2) On the other hand, following quantitative influence of high pressure on reflood phenomena was observed. The core cooling was better, and the mass flow rate of the steam generated in the core was larger. However, the steam velocity was smaller due to higher density of the steam. Therefore, the steam discharge through loops was easier and hence the so-called steam binding effect was weaker. And, the water accumulation rate in the core was larger. Consequently the core flooding mass flow rate was larger. Since the core cooling was better, the maximum core temperature was lower and the
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Iguchi, Tadashi;
Sugimoto, Jun;
Akimoto, Hajime;
Okubo, Tsutomu;
Murao, Yoshio
[1]
- Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment
Citation Formats
Iguchi, Tadashi, Sugimoto, Jun, Akimoto, Hajime, Okubo, Tsutomu, and Murao, Yoshio.
Evaluation report on CCTF Core-II reflood test C2-1 (Run 55). Effect of pressure on reflood phenomena.
Japan: N. p.,
1991.
Web.
Iguchi, Tadashi, Sugimoto, Jun, Akimoto, Hajime, Okubo, Tsutomu, & Murao, Yoshio.
Evaluation report on CCTF Core-II reflood test C2-1 (Run 55). Effect of pressure on reflood phenomena.
Japan.
Iguchi, Tadashi, Sugimoto, Jun, Akimoto, Hajime, Okubo, Tsutomu, and Murao, Yoshio.
1991.
"Evaluation report on CCTF Core-II reflood test C2-1 (Run 55). Effect of pressure on reflood phenomena."
Japan.
@misc{etde_10117118,
title = {Evaluation report on CCTF Core-II reflood test C2-1 (Run 55). Effect of pressure on reflood phenomena}
author = {Iguchi, Tadashi, Sugimoto, Jun, Akimoto, Hajime, Okubo, Tsutomu, and Murao, Yoshio}
abstractNote = {A high pressure test (0.42 MPa) on the reflood phenomena was performed with the CCTF. The result of the test was compared with the experimental result of the base case test (0.2 MPa). (1) The overall flow characteristics in the high pressure test were qualitatively similar to that of the base case test. Any qualitatively different phenomena were not recognized during reflood phase. This indicates that it is reasonable to utilize the physical reflood model developed from the result of the base case test to the high pressure condition at least up to 0.42 MPa for prediction of reflood behavior of PWRs. (2) On the other hand, following quantitative influence of high pressure on reflood phenomena was observed. The core cooling was better, and the mass flow rate of the steam generated in the core was larger. However, the steam velocity was smaller due to higher density of the steam. Therefore, the steam discharge through loops was easier and hence the so-called steam binding effect was weaker. And, the water accumulation rate in the core was larger. Consequently the core flooding mass flow rate was larger. Since the core cooling was better, the maximum core temperature was lower and the last quenching was earlier. This result was the same as that previously observed in CCTF tests in the scope of the pressure upto 0.3 MPa. (3) The higher pressure leads to the better core cooling, and hence the safety margin increases with the increase in the pressure. (author).}
place = {Japan}
year = {1991}
month = {Oct}
}
title = {Evaluation report on CCTF Core-II reflood test C2-1 (Run 55). Effect of pressure on reflood phenomena}
author = {Iguchi, Tadashi, Sugimoto, Jun, Akimoto, Hajime, Okubo, Tsutomu, and Murao, Yoshio}
abstractNote = {A high pressure test (0.42 MPa) on the reflood phenomena was performed with the CCTF. The result of the test was compared with the experimental result of the base case test (0.2 MPa). (1) The overall flow characteristics in the high pressure test were qualitatively similar to that of the base case test. Any qualitatively different phenomena were not recognized during reflood phase. This indicates that it is reasonable to utilize the physical reflood model developed from the result of the base case test to the high pressure condition at least up to 0.42 MPa for prediction of reflood behavior of PWRs. (2) On the other hand, following quantitative influence of high pressure on reflood phenomena was observed. The core cooling was better, and the mass flow rate of the steam generated in the core was larger. However, the steam velocity was smaller due to higher density of the steam. Therefore, the steam discharge through loops was easier and hence the so-called steam binding effect was weaker. And, the water accumulation rate in the core was larger. Consequently the core flooding mass flow rate was larger. Since the core cooling was better, the maximum core temperature was lower and the last quenching was earlier. This result was the same as that previously observed in CCTF tests in the scope of the pressure upto 0.3 MPa. (3) The higher pressure leads to the better core cooling, and hence the safety margin increases with the increase in the pressure. (author).}
place = {Japan}
year = {1991}
month = {Oct}
}