Title:
原子炉ヘッド、このような原子炉ヘッドを含む原子炉および原子炉のメンテナンス方法
Document Type and Number:
Japanese Patent JP7340698
Kind Code:
B2
Abstract:
A nuclear reactor head (12) comprising a vessel top head (14), a penetration (36) extending through the vessel top head (14) along a penetration axis (B) for allowing passage of a control shaft (34) of a control rod drive mechanism (32) through the vessel top head (14) and to a corresponding control guide tube (30) of the nuclear reactor (2), the penetration (36) comprising a penetration tube (38) extending through the vessel top head (14) and a thermal sleeve (40) extending inside the penetration tube (38) and coaxially with the penetration tube (38) with an axial play between the thermal sleeve (40) and the penetration tube (38), wherein the nuclear reactor head further comprises a spacer (60) attached to a lower end of the thermal sleeve (40) for maintaining minimal spacing with the upper end of the corresponding control rod guide tube (30).
Inventors:
Melcher, Ryan
Graves, Charles
Graves, Charles
Application Number:
JP2022520663A
Publication Date:
September 07, 2023
Filing Date:
October 03, 2019
Export Citation:
Assignee:
Framatome Incorporated
International Classes:
G21C7/16; G21C13/00; G21C13/032
Domestic Patent References:
| JP7096463A | ||||
| JP8036081A |
Foreign References:
| FR2727560A1 | ||||
| FR2701785A1 |
Attorney, Agent or Firm:
Keiichi Ohta