Characteristic examination and IAEA acceptance test for waste container assay system (WCAS) #2

; *; *; Aoki, Isao; ;

JNC TN8410 2002-008, 136 Pages, 2002/04

JNC-TN8410-2002-008.pdf:9.98MB

The Plutonium Fuel Center at Tokai Works has installed the Waste Container Assay System #2 made by Canberra Industries in US to assay the quantity of plutonium at 2 PWSF. The Center had performed characteristic examination for WCAS#2 since June of 2000, and IAEA had performed the acceptance test for this equipment with MEXT JSGO inspectors in March of 2001. Therefore, WCAS|#2 was available to use as an accountancy control device and a safeguards inspection device since June of 2001. This characteristic examination was performed based on the experience of a similar examination of WCAS#1 using the PuO powder of standard samples which were arranged to enter a state near real waste container. As a result, Assay error became about 9%(16) or less and the lower limit of detection is about 2mg(Pu-eff). The safeguards inspection parameter was able to be set by this acceptance test.

None

; ; Aoki, Isao; *; *; *

PNC TN8440 91-051, 6 Pages, 1991/10

PNC-TN8440-91-051.pdf:0.16MB

None

Japan experimental fast reactor "JOYO" operation report; Incidents recorded during operation (April 1980 March 1981)

Nakano, Makoto*; *; *; *; *; *; *

PNC TN942 82-02, 57 Pages, 1982/03

PNC-TN942-82-02.pdf:1.45MB

This reports deals with the incidents recorded during the period from April 1980 to March 1981. During this period JOYO operated the second, third and the half of forth normal operation cycles with the second annual maintenance. JOYO has 247 reported incidents and troubles in this period. 0f these 17% were associated with the secondary sodium cooling system and 16% with the service building air conditioning system. During this period the frequency of incidents involving instrument is highest and amounted to 17% of total numbers of incidents however, that of valves, detectors, control panels, piping and cabling, and belts are also high.

Technical support for planning and installation of simple ground repository; FY2011 status of support activities for promotion of decontamination in the Fukushima Environmental Safety Center, JAEA

Abe, Hironobu; Ikeda, Koki; Mikake, Shinichiro; Nagasaki, Yasushi; Niizato, Tadafumi; Asazuma, Shinichiro; Aoki, Isao; Ishikawa, Nobuyuki; Ishikawa, Hiroyasu; Ishizaki, Nobuhiro; et al.

no journal, , 

no abstracts in English

JAEA's technical experiences and lessons learned for environmental remediation of Fukushima, 2; Technical supports for local governments (decontamination of concrete)

Hata, Katsuro; Ishikawa, Nobuyuki; Uesaka, Takahiro; Sudo, Tomoyuki; Matsumoto, Masaki; Aoki, Isao; Ishizaki, Nobuhiro; Imamura, Hiroaki; Uchida, Shinichi; Kikuchi, Sakae; et al.

no journal, , 

JAEA supports the decontamination activity that the local government of Fukushima carries out. In addition, JAEA carries out instruction and the advice about decontamination. I explain the concrete-based decontamination method of the house which polluted by the accident of the nuclear power plant.

Technical know-how on the decontamination work taking into consideration of the transport behavior of radiocaesium accompanied with transport and deposition of soil particles, and stream flow

Niizato, Tadafumi; Aoki, Isao; Asazuma, Shinichiro

no journal, , 

This paper presents current status on the JAEA's study of the dynamic behavior of radiocaesium in the Fukushima environment and technical know-how on the decontamination work.

Estimation of dose reduction factor before and after decontamination

Ishizaki, Azusa; Mori, Airi; Kawase, Keiichi; Kato, Mitsugu; Watanabe, Masanori; Aoki, Isao; Munakata, Masahiro

no journal, ,