Maintenance activities in chemical processing facility, 1; Renewal of driving unit of negative pressure control valves

Kobayashi, Yuki; Takahashi, Tetsuro; Shinozaki, Tadahiro; Ogasawara, Koji; Koizumi, Kenji; Nakajima, Yasuo

Nihon Hozen Gakkai Dai-7-Kai Gakujutsu Koenkai Yoshishu, p.161 - 166, 2010/07

The negative pressure control valve is reliable apparatus which has been used in many nuclear facilities. In recent years, there are some troubles on those valves in CPF (Chemical Reprocessing Facility) by the aged deterioration because the valves were kept using for more than 25 years after facility had operated. Therefore, we have been carrying out renewal of driving units of the valves to assure performance of negative pressure control function and to keep stability of operation of the facility. In this presentation, we report knowledge provided through the renewal work, such as the renewal procedure, the deterioration situation of components and the cause of troubles.

Advanced thermal reactor "FUGEN"; The Investigation to revise the appendix 10 of the application document for permission of nuclear reactor establishement and amendment

*; *; *

PNC TN3720 88-007, 235 Pages, 1988/03

PNC-TN3720-88-007.pdf:16.69MB

As the irradiation test in developing high-burnup fuels for the ATR, a loading of MOX fuel assembly containing UO-GdO fuel rods to the "FUGEN" is planning. We have analyzed and evaluated the intergrity and the safety of these fuels based on the safety examination guides. The appendix 10 of the application document for permission of nuclear reactor establishment and amendment of the "FUGEN" were revised. The present report describes the results of these investigation refeing to the appendix 10 for LWRs.

A Computer Code to Study Error Magnetic Fields by a Model of Practical Poloidal Fields Coils of a Large Tokamak

*; *; ; ; *; *; ; ;

JAERI-M 6470, 14 Pages, 1976/03

JAERI-M-6470.pdf:0.45MB

no abstracts in English

Power Supply for Air-Core Transformer Coils of a Large Tokamak by Multi-Stage Inductive Energy Strage Systems; Optimal Design of the Electric Circuits by a Simplex Method

; *; ; Takeda, Tatsuoki; ; *; ; *

JAERI-M 6467, 32 Pages, 1976/03

JAERI-M-6467.pdf:1.09MB

no abstracts in English

Examination of determination to Pu amount in LASW from TRP

Makino, Risa; Kabuki, Toshihide*; Tomikawa, Hirofumi; Hina, Tetsuro; Ozone, Takashi; Kurosu, Kazutoshi; Fukuhara, Junichi; Kobayashi, Kentaro

no journal, , 

Tokai Reprocessing Center has developed method of determination of Pu contained in low activity solid wastes (LASWs), to make better accountancy control. Our final goal is to estimate of Pu amounts in wastes generated in Tokai Reprocessing Plant (TRP). Some of small size wastes (carton-boxes) and drums from TRP was measured by some kind of non-destructive assay system. It was found that high dose wastes have slight amounts of Pu. However, because some of wastes from TRP have FPs, the wastes could not be measured exactly. Near future, JAEA will try upgrading or development of NDA system, and determination of Pu amount of wastes from TRP.

Influence of heavy ion irradiation on magnetic tunnel junctions

Kobayashi, Daisuke*; Kakehashi, Yuya*; Hirose, Kazuyuki*; Ikeda, Shoji*; Yamanouchi, Michihiko*; Sato, Hideo*; Enobio, E. C.*; Endo, Tetsuo*; Ohno, Hideo*; Onoda, Shinobu; et al.

no journal, , 

no abstracts in English