Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Sakakibara, Hiroshi; Aoki, Nobuhiro; Muto, Masahiro; Otabe, Jun; Takahashi, Kenji*; Fujita, Naoyuki*; Hiyama, Kazuhiko*; Suzuki, Hirokazu*; Kamogawa, Toshiyuki*; Yokosuka, Toru*; et al.
JAEA-Technology 2020-020, 73 Pages, 2021/03
JAEA-Technology-2020-020.pdf:8.26MB
The decommissioning is currently in progress at the prototype fast breeder reactor Monju. Fuel assemblies will be taken out of its core for the first step of the great task. Fuel assemblies stand on their own spike plugged into a socket on the core support plate and support with adjacent assemblies through their housing pads each other, resulting in steady core structure. For this reason, some substitutive assemblies are necessary for the purpose of discharging the fuel assemblies of the core. Monju side commissioned, therefore, Plutonium Fuel Development Center to manufacture the substitutive assemblies and the Center accepted it. This report gives descriptions of design, manufacture, and shipment in regard to the substitutive assemblies.
*; *; Kawahara, Kenichi*; *; *; *; *
JNC TJ8400 99-051, 61 Pages, 1999/02
In this study, a research and development plan for overpacks has been proposed by identifying issues for developing overpacks and organizing approaches for resolving them, as well as investigating a structural design methodology for overpacks and a quality control method in manufacturing them. The results are summarized as follows: (1)Technical Requirements for overpacks. Tentative technical requirements for overpacks are summarized on the survey of overseas literatures and performance assessment models discussed so far. (2)Determination of Reference Design. Handling and manufacturing methods for overpacks are discussed. Reference overpack structures are determined considering the discussion on the structural strength. (3)Approach to assuring structural integrity of overpacks. Load conditions and rupture modes after backfill are reviewed. A structural design methodology for overpacks was discussed based on FEM analyses. In addition, inspection items, which are necessary to assure that technical requirements are satisfied. (4)Destructive test. Destructive test is carried out in order to validate FEM analysis and others for basing a structural design methodology. As a consequence of the test, we could verify the sufficient reliability of FEM analysis and conservatism of the design methodology. (5)Quality control method. R&D items for quality control of overpacks are summarized based on the ideas of the order No. 73 issued by the Prime Minister's Office. Validation of measurement reliability for ultrasonic tests is the major R&D items in the future. (6)Preparation for R&D plan. A R&D plan for developing technical criteria for overpacks is summarized.
*; *; Kawahara, Kenichi*; *; *; *; *
JNC TJ8400 99-050, 310 Pages, 1999/02
In this study; a research and development plan for overpacks has been proposed by identifying issues for developing overpacks and organizing approaches for resolving them, as well as investigating a structural design methodology for overpacks and a quality control method in manufacturing them. The results are summarized as follows: (1)Technical Requirements for overpacks. Tentative technical requirements for overpacks are summarized on the survey of overseas literatures and performance assessment models discussed so far. (2)Determination of Reference Design. Handling and manufacturing methods for overpacks are discussed. Reference overpack structures are determined considering the discussion on the structural strength. (3)Approach to assuring structural integrity of overpacks. Load conditions and rupture modes after backfill are reviewed. A structural design methodology for overpacks was discussed based on FEM analyses. In addition, inspection items, which are necessary to assure that technical requirements are satisfied. (4)Destructive test. Destructive test is carried out in order to validate FEM analysis and others for basing a structural design methodology. As a consequence of the test, we could verify the sufficient reliability of FEM analysis and conservatism of the design methodology. (5)Quality control method. R&D items for quality control of overpacks are summarized based on the ideas of the order No. 78 issued by the Prime Minister's Office. Validation of measurement reliability for ultrasonic tests is the major R&D items in the future. (6)Preparation for R&D plan. A R&D plan for developing technical criteria, for overpacks is summarized.
Sakakibara, Hiroshi; Aoki, Nobuhiro; Muto, Masahiro; Otabe, Jun; Takahashi, Kenji*; Fujita, Naoyuki*; Hiyama, Kazuhiko*; Suzuki, Hirokazu*; Kamogawa, Toshiyuki*; Yokosuka, Toru*; et al.
no journal, ,
no abstracts in English