Abstract
Control Rod Drive Mechanism (CRDM) is contained in control rod stand-pipes for the High Temperature Engineering Test Reactor (HTTR). The CRDM, which consists of clutch and motor mechanism, is exposed to helium gas. If the temperature of helium gas around the CRDM exceeds 60degC, the CRDM would malfunction because of the low heat resistance of the electrical insulator. In experiments with an one-half scale model of all stand-pipes, the air flow around the stand-pipes was visualized by the surface tuft method and optimized condition for air flow inlet and outlet was chosen from a viewpoint of cooling performance for the CRDM. Experimental results show that a set of five air inlet and outlet at thirty degree intervals on a pair of ring-ducts surrounding the stand-pipes is selected as optimized condition. In addition, the temperature distribution of helium gas around the DRDM was analyzed by two computational fluid dynamic codes `STREAM` and `SSPHEAT` under this condition. Analytical results show that the temperature of helium gas around the CRDM in any control rod stand-pipe is below the limit of 60degC. (author).
Takeda, Takeshi;
Kunitomi, Kazuhiko;
[1]
Ishihara, Keisuke
- Japan Atomic Energy Research Inst., Oarai, Ibaraki (Japan). Oarai Research Establishment
Citation Formats
Takeda, Takeshi, Kunitomi, Kazuhiko, and Ishihara, Keisuke.
A study on cooling air flow around stand-pipes for the High Temperature Engineering Test Reactor.
Japan: N. p.,
1993.
Web.
Takeda, Takeshi, Kunitomi, Kazuhiko, & Ishihara, Keisuke.
A study on cooling air flow around stand-pipes for the High Temperature Engineering Test Reactor.
Japan.
Takeda, Takeshi, Kunitomi, Kazuhiko, and Ishihara, Keisuke.
1993.
"A study on cooling air flow around stand-pipes for the High Temperature Engineering Test Reactor."
Japan.
@misc{etde_10120892,
title = {A study on cooling air flow around stand-pipes for the High Temperature Engineering Test Reactor}
author = {Takeda, Takeshi, Kunitomi, Kazuhiko, and Ishihara, Keisuke}
abstractNote = {Control Rod Drive Mechanism (CRDM) is contained in control rod stand-pipes for the High Temperature Engineering Test Reactor (HTTR). The CRDM, which consists of clutch and motor mechanism, is exposed to helium gas. If the temperature of helium gas around the CRDM exceeds 60degC, the CRDM would malfunction because of the low heat resistance of the electrical insulator. In experiments with an one-half scale model of all stand-pipes, the air flow around the stand-pipes was visualized by the surface tuft method and optimized condition for air flow inlet and outlet was chosen from a viewpoint of cooling performance for the CRDM. Experimental results show that a set of five air inlet and outlet at thirty degree intervals on a pair of ring-ducts surrounding the stand-pipes is selected as optimized condition. In addition, the temperature distribution of helium gas around the DRDM was analyzed by two computational fluid dynamic codes `STREAM` and `SSPHEAT` under this condition. Analytical results show that the temperature of helium gas around the CRDM in any control rod stand-pipe is below the limit of 60degC. (author).}
place = {Japan}
year = {1993}
month = {Oct}
}
title = {A study on cooling air flow around stand-pipes for the High Temperature Engineering Test Reactor}
author = {Takeda, Takeshi, Kunitomi, Kazuhiko, and Ishihara, Keisuke}
abstractNote = {Control Rod Drive Mechanism (CRDM) is contained in control rod stand-pipes for the High Temperature Engineering Test Reactor (HTTR). The CRDM, which consists of clutch and motor mechanism, is exposed to helium gas. If the temperature of helium gas around the CRDM exceeds 60degC, the CRDM would malfunction because of the low heat resistance of the electrical insulator. In experiments with an one-half scale model of all stand-pipes, the air flow around the stand-pipes was visualized by the surface tuft method and optimized condition for air flow inlet and outlet was chosen from a viewpoint of cooling performance for the CRDM. Experimental results show that a set of five air inlet and outlet at thirty degree intervals on a pair of ring-ducts surrounding the stand-pipes is selected as optimized condition. In addition, the temperature distribution of helium gas around the DRDM was analyzed by two computational fluid dynamic codes `STREAM` and `SSPHEAT` under this condition. Analytical results show that the temperature of helium gas around the CRDM in any control rod stand-pipe is below the limit of 60degC. (author).}
place = {Japan}
year = {1993}
month = {Oct}
}