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Kano, Yutaka; ; ; *; Hoshiba, Hideaki; ; Shindo, Katsutoshi
JNC TN9410 2002-009, 127 Pages, 2002/03
JNC-TN9410-2002-009.pdf:10.69MB
The 13th periodical inspection of the experimental fast reactor JOYO is being made from Jun. 2000 to Jan. 2003. While this inspection, from the end of oct. 2000 to Nov. 2001, the MK-III modification work on heat transport system was made in lower region of the reactor containment vessel in the reactor facility (under floor area). In the MK-III modification work, the works important to radiation control were the replacement of intermediate heat exchangers (IHxs) and fixtures, and the picking out of the surveillance material from primary heat transport piping carried out in the maintenance building. Because the working areas of these works were executed in small space around the complicated primary heat transport piping, workability was bad and dose rate from the corrosion products (CP) in piping or fixtures was high. In such condition, radiation control was performed mainly concerned about external exposure. The planned total external exposure of the IHX replacement and related works was 7135 man
mSv (target of total dose control: less than 5708 manmSv, 80% of the plan), derived from special radiation work plans for segmental works, concerned about work procedure, number of workers, period of work, dose rate of working area and surface dose rate of equipments. The special radiation control organization was established for such long and large-scale work. The special organization held detailed discussion about radiation control of this work with the execution section and contractors appropriately, performed carefal external/internal exposure control and surface contamination control and made effects to reduce the external exposure thoroughly. As a result of these action, the total external exposure was 2386 manmSv ( 
33% of the plan, 42% of the target) and the maximum individual exposure were 24.7 mSv for staffs and 21.7 mSv for contractors. The dose rate, surface contamination and air contamination while the works were ...
; Kano, Yutaka; ; Shindo, Katsutoshi
JNC TN9410 2000-001, 20 Pages, 1999/12
JNC-TN9410-2000-001.pdf:1.84MB
The 12th periodic inspection had been executed at the experimental fast reactor JOYO from February 24,1998 to June 28,1999. This inspection had been extended about three months because it was addtion to the work for the safety countermeasure. The result of collective dose equivalent was 263.92 man*mSv, whereas, the expected collective dose equivalent was about 407 man*mSv in the whole period of this inspection. It was confirmed that this inspection was carried out with the suitable radiation protection programmes. In this report, provided in 12th periodic inspection, were described with taking the results of the past periodic inspections into consideration.
Watanabe, Katsutoshi; Shindo, Masami; Nakajima, Hajime; Koikegami, Hajime*; Higuchi, Makoto*; Nakanishi, Tsuneo*; Sahira, Kensho*; Marushichi, Koki*; Takeiri, Toshiki*; Saito, Teiichiro*; et al.
JAERI-Research 97-009, 62 Pages, 1997/02
JAERI-Research-97-009.pdf:4.82MB
no abstracts in English
; Watanabe, Katsutoshi; Shindo, Masami
JAERI-Research 95-088, 16 Pages, 1996/01
JAERI-Research-95-088.pdf:1.07MB
no abstracts in English
*; Shindo, Katsutoshi*; *
PNC TN9440 87-003, 128 Pages, 1987/07
This annual report summarizes meteorological data (from JAN, to DEC., 1986) at the O-arai Engineering Center of PNC. Meteorological items are the temperature, precipitation, wind direction, windspeed and atmospheric stability. Also, this report includes calculated data such as sum of reciprocal windspeed for the atmospheric stability to be applied in the environmental dose evaluation.
*; Shindo, Katsutoshi*; *; *
PNC TN9440 87-004, 384 Pages, 1987/03
This Annual Report summarizes meteorological data (from JAN. to DEC., 1985) at the O-arai Engineering Center of PNC. Meteorological items are the temperature, precipitation, wind direction, windspeed and atmospheric stability. Also, this report includes calculated data such as sum of reciprocal windspeed for the atmospheric stability to be applied in the environmental dose evaluation.
*; Shindo, Katsutoshi*; *
PNC TN9440 87-002, 476 Pages, 1987/02
This annual report summarizes meteorological data (from JAN. to DEC., 1984) at the O-arai Engineering Center of PNC. Meteorological items are the temperature, precipitation, wind direction, windspeed and atmospheric stability. also, this report includes calculated data such as sum of reciprocal windspeed for the atmospheric stability to be applied in the environmental dose evaluation.
*; Shindo, Katsutoshi*; *
PNC TN9440 86-005, 485 Pages, 1986/12
This Annual Report summarizes meteorological data (from JAN. to DEC., 1983) at the O-arai Engineering Center of PNC. Meteorological items are the temperature, precipitation, wind direction, windspeed and atmospheric stability. Also, this report includes calculated data such as sum of reciprocal windspeed for the atmospheric stability to be applied in the environmental dose evaluation.
*; Shindo, Katsutoshi*; *
PNC TN9440 86-004, 485 Pages, 1986/11
This Annual Report summarizes meteorological data (from Jan. to Dec., 1982) at the O-arai Engineering Center of PNC. Meteorological items are the temperature, precipitation, wind direction, windspeed and atmospheric stability. Also, this report includes calculated data such as sum of reciprocal windspeed for the atmospheric stability to be applied in the environmental dose evaluation.
*; Shindo, Katsutoshi*; *
PNC TN9440 86-003, 485 Pages, 1986/10
This Annual Report summarizes meteorological data (from JAN. to DEC., 1981) at the O-arai Engineering Center of PNC. Meteorological items are the temperature, precipitation, wind direction, windspeed and atmospheric stability. Also, this report includes calculated data such as sum of reciprocal wind speed for the atmospheric stability to be applied in the environmental dose evaluation.
*; Shindo, Katsutoshi*; *
PNC TN9410 86-117, 145 Pages, 1986/10
An accident has occurred at the Chernobyl atomic power station, USSR on April 26, 1986. By this accident, a lot of radioactive debris was released into the atomosphere, and in all parts of Japan, as well as European countries, that debris was observed in the rain, airborne just and other environmental samples. This report presents a summary of the environmental monitoring performed at O-arai Engineering Center for the period of April 30 - July 4, 1986. Furthermore, preliminary estimation of commited dose equivalent to the public in O-arai area is included.
*; Shindo, Katsutoshi*; *
PNC TN9440 86-001, 494 Pages, 1986/03
This Annual Report summarizes meteorological data (from JAN. to DEC., 1980) at the O-arai Engineering Center of PNC. Meteorological items are the temperature, precipitation, wind direction, windspeed and atmospheric stability. Also, this report includes calculated data such as sum of reciprocal windspeed for atmospheric stability to be applied in the environmental dose evaluation.