Horonobe Underground Research Laboratory Project; Investigation program for the 2010 fiscal year

Nakayama, Masashi; Sanada, Hiroyuki; Sano, Michiaki; Sugita, Yutaka

JAEA-Review 2010-041, 26 Pages, 2010/10

JAEA-Review-2010-041.pdf:3.2MB

As part of the research and development program on geological disposal of high-level radioactive waste (HLW), the Horonobe Underground Research Center, a division of the JAEA is implementing the Horonobe URL Project with the aim at investigating sedimentary rock formations. According to the research plan described in the Midterm Plan of JAEA, geological investigations are to be carried out during the drilling of a shaft down to around 350 m depth, while research and development in the areas of engineering technology and safety assessment are to be promoted by collaboration with other research organizations. The results of the R&D activities will be systematized as a "knowledge base" that supports a wide range of arguments related to the safety of geological disposal. The Horonobe URL Project is planned to extend over a period of 20 years. The investigations will be conducted in three phases, namely "Phase 1: Surface-based investigations", "Phase 2: Construction phase" (investigations during construction of the underground facilities) and "Phase 3: Operation phase" (research in the underground facilities). This report summarizes the investigation program for the 2010 fiscal year (2010/2011). In the 2010 fiscal year, investigations in "geoscientific research", including "development of techniques for investigating the geological environment", "development of techniques for long-term monitoring of the geological environment", "development of engineering techniques for use in the deep underground environment" and "studies on the long-term stability of the geological environment", are continuously carried out. Investigations in "research and development on geological disposal technology", including "improving the reliability of disposal technologies" and "enhancement of safety assessment methodologies", are also continuously carried out. Construction of the underground facilities is ongoing at Access Shaft (East) and 250 m depth drift.

Horonobe Underground Research Laboratory Project; Investigation report for the 2008 fiscal year

Nakayama, Masashi; Sano, Michiaki; Sanada, Hiroyuki; Sugita, Yutaka

JAEA-Research 2009-032, 68 Pages, 2009/11

JAEA-Research-2009-032.pdf:30.99MB

The Horonobe Underground Research Laboratory Project is planned to extend over a period 20 years. The investigations will be conducted in 3 phases, namely "Phase 1: Surface-based investigations", "Phase 2: Construction Phase" (investigations during construction of the underground facilities) and "Phase 3: Operation phase" (research in the underground facilities). This report summarizes the results of the investigations for the 2008 fiscal year (2008/2009), the 4th year of the Phase 2 investigations. The investigations, which are composed of "Geoscientific research" and "R&D on the geological disposal of high-level radioactive waste (HLW)", were carried out according to "Horonobe Underground Research Laboratory Project Investigation Program for the 2008 Fiscal year". The results of these investigations, along with the results which were obtained in other departments of Japan Atomic Agency (JAEA), are properly offered to the implementations and the safety regulations. JAEA proceeded with the project in collaboration with experts from domestic and overseas research organisation.

Proceeding of the Workshop on Gamma-ray Spectroscopy Utilizing Heavy-ion, Photon and RI Beams; July 15 and 16, 1997, JAERI, Tokai, JAPAN

Oshima, Masumi; Sugita, Michiaki; Hayakawa, Takehito*

JAERI-Conf 98-008, 109 Pages, 1998/03

JAERI-Conf-98-008.pdf:5.63MB

no abstracts in English

Quadrupole deformation of barium isotopes

Sugita, Michiaki; *; Furuno, Kohei*

Physics Letters B, 440(3-4), p.239 - 245, 1998/00

https://doi.org/10.1016/S0370-2693(98)01181-2

no abstracts in English

E1 transitions in rare earth nuclei and the SPDF boson model

Sugita, Michiaki; Otsuka, Takaharu*; P.von-Brentano*

Physics Letters B, 389(4), p.642 - 648, 1996/00

https://doi.org/10.1016/S0370-2693(96)80003-7

no abstracts in English

Double- phonon excitation in the Os nuclei

Sugita, Michiaki; Otsuka, Takaharu*

Nuclear Physics A, 557, p.643C - 652C, 1993/00

https://doi.org/10.1016/0375-9474(93)90576-J

no abstracts in English

Shape transition of nuclei with mass around A=100

Sugita, Michiaki; *

Nuclear Physics A, 515, p.77 - 92, 1990/00

https://doi.org/10.1016/0375-9474(90)90323-E

no abstracts in English

Proton-neutron sdg boson model and spherical-deformed phase transition

Otsuka, Takaharu; Sugita, Michiaki

Physics Letters B, 215(2), p.205 - 210, 1988/12

https://doi.org/10.1016/0370-2693(88)91421-9

no abstracts in English

Equivalence between -instability and rigid triaxiality in finite boson systems

Otsuka, Takaharu*; Sugita, Michiaki

Physical Review Letters, 59(14), p.1541 - 1544, 1987/10

https://doi.org/10.1103/PhysRevLett.59.1541

It is shown, by use of the O(6) limit of the interacting-boson model, that the -unstable state can be generated from the rigid triaxial intrinsic state with =30.