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JAEA Reports

Preliminary study on the corrosion behavior of carbon steel in Horonobe groundwater environment

Taniguchi, Naoki; Kogawa, Noritaka*; Maeda, Kazuto*

JAEA-Research 2006-051, 60 Pages, 2006/08

JAEA-Research-2006-051.pdf:6.45MB

It is necessary to understand the corrosion behavior of candidate overpack materials to plan the in-situ engineered barrier test at underground laboratory constructing at Horonobe and to design the overpacks suitable to Horonobe environment. The preliminary corrosion tests of carbon steel which is a candidate material for overpacks were carried out using artificial groundwater and actual groundwater sampled at Horonobe. As the results of anodic polarization experiments, the anodic polarization curves of carbon steel in buffer material were active dissolution type, and the corrosion type of carbon steel in Horonobe groundwater environment was expected to be general corrosion. The results of immersion test under air equilibrium condition and anaerobic condition showed that the corrosion rate and the degree of corrosion localization were not exceeded the data obtained in previous studies. Based on the experimental results, it was confirmed that the corrosion assessment model and assumed corrosion rate in second progress report (H12 report) can be applied to the assessment for Horonobe groundwater condition.

JAEA Reports

Study on the structural integrity of overpacks

*; *; Kawahara, Kenichi*; *; *; *; *

JNC TJ8400 99-051, 61 Pages, 1999/02

JNC-TJ8400-99-051.pdf:3.49MB

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.

JAEA Reports

Study on the structural integrity of overpacks

*; *; Kawahara, Kenichi*; *; *; *; *

JNC TJ8400 99-050, 310 Pages, 1999/02

JNC-TJ8400-99-050.pdf:8.92MB

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.

JAEA Reports

None

Fusaeda, Shigeki*; Yanagisawa, Ichiro*; Kataoka, Shinichi*; Shimada, Takashi*; *; *; *

PNC TJ1216 98-007, 46 Pages, 1998/02

PNC-TJ1216-98-007.pdf:1.59MB

None

JAEA Reports

None

Fusaeda, Shigeki*; Yanagisawa, Ichiro*; Kataoka, Shinichi*; Shimada, Takashi*; *; *; *

PNC TJ1216 98-006, 673 Pages, 1998/02

PNC-TJ1216-98-006.pdf:17.22MB

None

JAEA Reports

Development Study on the Geochemical Database

Kataoka, Shinichi*; Kitao, Hideo*; Tachikawa, Hirokazu*; Shimada, Takashi*; Maeda, Kazuto*; Nemoto, Kazuaki*; Yanagisawa, Ichiro*

PNC TJ1216 98-002, 676 Pages, 1998/02

PNC-TJ1216-98-002.pdf:17.64MB

None

JAEA Reports

None

*; Fusaeda, Shigeki*; Kataoka, Shinichi*; Nemoto, Kazuhiko*; Yanagisawa, Ichiro*; Fukui, Hiroshi*; Doi, Motoo*

PNC TJ1216 97-007, 77 Pages, 1997/03

PNC-TJ1216-97-007.pdf:2.93MB

None

JAEA Reports

None

*; *; Kataoka, Shinichi*; Nemoto, Kazuhiko*; Yanagisawa, Ichiro*; Fukui, Hiroshi*; Doi, Motoo*

PNC TJ1216 97-006, 202 Pages, 1997/03

PNC-TJ1216-97-006.pdf:10.03MB

None

JAEA Reports

Integration study (IV) for performance assessment system of geological disposal

Yanagisawa, Ichiro*; Ezaki, Masahiro*; Ishihara, Yoshinao*; Fusaeda, Shigeki*; Mukai, Satoru*; Doi, Hideo*; Maeda, Kazuto*; Nakahara, Yutaka*

PNC TJ1214 93-001, 544 Pages, 1993/03

PNC-TJ1214-93-001.pdf:16.47MB

None

JAEA Reports

Measurement of double-differential neutron emission cross sections of $$^{238}$$U, $$^{232}$$Th and $$^{12}$$C for 18 MeV neutrons

Baba, Mamoru*; *; *; *; *; *

JAERI-M 91-059, 30 Pages, 1991/04

JAERI-M-91-059.pdf:1.06MB

no abstracts in English

JAEA Reports

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