The 20th anniversary of JAEA-AMS-TONO

Ishimaru, Tsuneari

JAEA-Conf 2018-013, p.13 - 16, 2019/02

https://doi.org/10.11484/jaea-conf-2018-003

In the Tono Geoscience Center, JAEA-AMS-TONO was introduced in March 1997 and it will be the 20th year in this year. After introduction, we maintained the carbon-14 measurement first and we were able to steadily accumulate results.

Improved holdup blender assay system (IBAS) slope validation measurements to improve nuclear material accountancy of high alpha holdup

LaFleur, A. M.*; Nakamura, Hironobu; Menlove, H. O.*; Mukai, Yasunobu; Swinhoe, M. T.*; Marlow, J. B.*; Kurita, Tsutomu

Proceedings of 37th ESARDA Annual Meeting (Internet), p.435 - 441, 2015/08

The IBAS (Improved Holdup Blender Assay System) system for safeguards and nuclear material accountancy (NMA) of holdup measurements is used at PCDF. The purpose of this detector is to measure the doubles rate from each glovebox in order to determine the mass of Pu holdup. In order to establish calibration curves for the IBAS detector and improve the holdup measurement methodology, JAEA conducted the IBAS calibration exercise with LANL support using MOX standards in 2010. In 2011, a cleanout exercise was performed and the results showed that the holdup removed from the glovebox had a significantly higher alpha term (alpha = 15.8 - 31.5) than the MOX standards (alpha = 0.67) used to establish the 2010 calibration curves. To further investigate these findings, JAEA conducted slope validation measurements in 2013 to confirm the validity of IBAS calibration slopes for the case of high alpha holdup. This paper describes the IBAS slope validation tests, analysis of the experimental results, and the evaluation of the need for a correction factor for the high alpha holdup. Quantifying the alpha term of the holdup in each glove box and understanding how this value changes over time is important to improving the overall NMA at PCDF. The results from this work will provide invaluable experimental data that directly supports safeguards and NMA measurements of plutonium holdup in gloveboxes.

Results of DO release experiement; Transfer of deutrium and Carbon-13 from air to plant

Atarashi-Andoh, Mariko; Amano, Hikaru; Porntepkasemsan, B.; Kakiuchi, Hideki; Ichimasa, Michiko*; Ichimasa, Yusuke*

KURRI-KR-53, p.18 - 21, 2000/10

no abstracts in English

Instruments for the measurement of stable elements mass ratios and their application to environmental samples for the analysis of environmental behaviour of global warming gases and environmentally additional materials

Amano, Hikaru; Porntepkasemsan, B.; Atarashi-Andoh, Mariko; Kushita, Kohei

KURRI-KR-53, p.6 - 9, 2000/09

no abstracts in English

None

Iida, Takao*

JNC TJ6400 2000-008, 58 Pages, 1999/03

JNC-TJ6400-2000-008.pdf:1.9MB

None

The Development of Radiation Hardened Microcomputer System; System Design

Ishibashi, Yuzo; Kuroda, Yoshikatsu*; Nakajima, Atsushi*

PNC TJ8216 98-003, 243 Pages, 1998/03

PNC-TJ8216-98-003.pdf:6.5MB

no abstracts in English

None

PNC TJ6622 97-001, 38 Pages, 1997/03

PNC-TJ6622-97-001.pdf:1.33MB

None

Demonstration study on shielding safety analysis code (III)

Sawamura, Sadashi*

PNC TJ1600 96-003, 77 Pages, 1996/03

PNC-TJ1600-96-003.pdf:5.15MB

no abstracts in English

Bimodal nature of actinide fission

Otsuki, Tsutomu*; Nagame, Yuichiro; Ikezoe, Hiroshi; Tsukada, Kazuaki; Nakahara, Hiromichi*; *

Journal of Alloys and Compounds, 213-214, p.423 - 425, 1994/00

https://doi.org/10.1016/0925-8388(94)90950-4

no abstracts in English

Review on measurements of neutron resonance parameters and neutron capture cross sections for the fission product mass region in Japan

Nakajima, Yutaka

Proc. of a Specialists' Meeting on Fission Product Nuclear Data, p.147 - 161, 1993/00

no abstracts in English