### Abstract

The fuel assembly design with tightened fuel rod pitch gives a possibility of higher conversion ratio for Boiling Water Reactor. Pressure drop is one of the key design parameters to evaluate the possibility of BWR core with higher conversion ratio. The pressure drop tests for tight lattice rod bundle under steady conditions have been done under BWR fluid conditions. Two kind of a mini tight lattice bundle were used. One was a 7-rod test bundle with a hexagonal channel box. The other was a 14-rod test bundle with a rectangular channel box. The purpose of the 7-rod bundle tests was to survey the rod gap effect and the heating length effect on pressure drop. That of the 14-rod bundle test is to check the bundle shape and flow shape. The each pressure drop elements (head loss, friction loss, acceleration loss and spacer loss) were predicted based on the appropriate correlations for each item. The total pressure drop was obtained by sum of each pressure drop element. It was found from the compassion with data that the present prediction method has reasonable performance. The average and the standard deviation for the ratio of the predicted and the measured value is 1.05 and 9.7%.

Original language | English |
---|---|

Pages (from-to) | 701-708 |

Number of pages | 8 |

Journal | Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |

Volume | 72 |

Issue number | 3 |

Publication status | Published - 2006 Mar |

Externally published | Yes |

### Fingerprint

### Keywords

- BWR
- Friction Loss
- Pressure Drop
- Tight Lattice Bundle
- Triangular Array

### ASJC Scopus subject areas

- Mechanical Engineering

### Cite this

*Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B*,

*72*(3), 701-708.

**Study for pressure drop of rod bundle with tight lattice array.** / Morooka, Shinichi; Yamamoto, Yasushi; Shirakawa, Kenetsu.

Research output: Contribution to journal › Article

*Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B*, vol. 72, no. 3, pp. 701-708.

}

TY - JOUR

T1 - Study for pressure drop of rod bundle with tight lattice array

AU - Morooka, Shinichi

AU - Yamamoto, Yasushi

AU - Shirakawa, Kenetsu

PY - 2006/3

Y1 - 2006/3

N2 - The fuel assembly design with tightened fuel rod pitch gives a possibility of higher conversion ratio for Boiling Water Reactor. Pressure drop is one of the key design parameters to evaluate the possibility of BWR core with higher conversion ratio. The pressure drop tests for tight lattice rod bundle under steady conditions have been done under BWR fluid conditions. Two kind of a mini tight lattice bundle were used. One was a 7-rod test bundle with a hexagonal channel box. The other was a 14-rod test bundle with a rectangular channel box. The purpose of the 7-rod bundle tests was to survey the rod gap effect and the heating length effect on pressure drop. That of the 14-rod bundle test is to check the bundle shape and flow shape. The each pressure drop elements (head loss, friction loss, acceleration loss and spacer loss) were predicted based on the appropriate correlations for each item. The total pressure drop was obtained by sum of each pressure drop element. It was found from the compassion with data that the present prediction method has reasonable performance. The average and the standard deviation for the ratio of the predicted and the measured value is 1.05 and 9.7%.

AB - The fuel assembly design with tightened fuel rod pitch gives a possibility of higher conversion ratio for Boiling Water Reactor. Pressure drop is one of the key design parameters to evaluate the possibility of BWR core with higher conversion ratio. The pressure drop tests for tight lattice rod bundle under steady conditions have been done under BWR fluid conditions. Two kind of a mini tight lattice bundle were used. One was a 7-rod test bundle with a hexagonal channel box. The other was a 14-rod test bundle with a rectangular channel box. The purpose of the 7-rod bundle tests was to survey the rod gap effect and the heating length effect on pressure drop. That of the 14-rod bundle test is to check the bundle shape and flow shape. The each pressure drop elements (head loss, friction loss, acceleration loss and spacer loss) were predicted based on the appropriate correlations for each item. The total pressure drop was obtained by sum of each pressure drop element. It was found from the compassion with data that the present prediction method has reasonable performance. The average and the standard deviation for the ratio of the predicted and the measured value is 1.05 and 9.7%.

KW - BWR

KW - Friction Loss

KW - Pressure Drop

KW - Tight Lattice Bundle

KW - Triangular Array

UR - http://www.scopus.com/inward/record.url?scp=33745082479&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33745082479&partnerID=8YFLogxK

M3 - Article

VL - 72

SP - 701

EP - 708

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 3

ER -