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; ; Noda, Kimio
JNC TN8440 2002-001, 16 Pages, 2001/12
A series of attacks on America by terrorism on September 11, 2001 gave us a terrible shock. Two types of training against the act of terrorism had been held in Tokai Works of the Japan Nuclear Cycle Development Institute (JNC) to grasp the present situation of JNC Tokai Works and improve the countermeasure against the terrorism. The first training was for the incendiarism and the second one was for the injury. Consequently the revealed points to be improved were the followings. (1) Keeping a sense of crisis. The countermeasure against terrorism should be instructed and trained to realize the sense of crisis, that is, uncertainty of the time and the kind of terrorism. (2) Organization of the structure against the terrorism. The structure for the contingency should be organized to strengthen the guard structure by forming the pursuit team, the guard team and so on constituted by JNC's staff members. (3) Preparation of equipments against the terrorism. The coloring ball, club, two-pronged weapon, shield, knife proof vest and so on should be provided the guards of to strengthen the countermeasure before the police's arrival. (4) Preparation and announcement of manuals. The manuals against terrorism for the ordinary stuff members should be prepared and used in the training to make the ordinary stuff's countermeasure more effective.
Ito, Yasuhisa; Noda, Kimio; ;
JNC TN8410 2001-018, 67 Pages, 2001/04
There are waste storage pits where non-radioactive wastes generated from plutonium fuel facilities were stored in JNC Tokai Works. But radioactive wastes were found in one of the pit during wastes arrangement works. Therefore we set the pit temporary controlled area and recovered wastes from it. This report describes the radiation control technique of recovery work in detail.
Ito, Yasuhisa; Noda, Kimio; ; Izaki, Kenji; Ebana, Minoru*
JNC TN8410 2001-007, 81 Pages, 2001/03
Dust Monitor is one of the equipments that measure the concentration of air-borne radioactive materials. This monitor generally collects the dusts in the air by the air pumps, but this system has several problems. Therefore we made the prototypes of Dust Monitor and Dust Sampler that adopted static electrical collecting system, and examined these prototypes. As the result of examination, we confirmed that the static electrical collecting system has the same collection efficiency with air suction system and it is possible to use these prototypes in controlled area.
Izaki, Kenji; Noda, Kimio; ; Kashimuta, Yoshio*
JNC TN8410 2001-005, 30 Pages, 2001/01
Stack monitoring is the most important work in radiation control works. Exhaust monitors used for stack monitoring have the background (which is the counts by natural radio-nuclides) on normal condition, and the values of the background vary with the facilities. Therefore, if the value of background is high, it is difficult to estimate rapidly the radioactive concentration in the exhaust. In order to estimate rapidly the radioactive concentration in exhaust, we analyzed the behavior of natural radioactivity in the facilities and examine the technique fo reducing the value of the background. As a result of the examination, we found that it is possible to estimate rapidly if we change over the monitoring point to immediately after the HEPA filters on the exhaust duct. In this reports, the analyzed results of behavior of natural radio-nuclides in the facilities and the technique for reducing the values of the background are described. To reduce the value of the background has a major effect on not only rapidly estimating the radioactive density in the exhaust but also finding the unusual things on stack monitoring.
Noda, Kimio; Shinohara, Kunihiko; Kanamori, Masashi
JNC TN8410 2001-010, 35 Pages, 2000/10
We, the radiation control section of JNC have had two important experiences on the JCO critical accident and the JNC fire-explosion accident. Especially, at the critical accident in JCO, it was essential to take an action on the radiation protection activities for the evacuated neighboring inhabitants to the safety area. During the accident, we carried out the radiation protection activities, at the beginning of the accident, environmental monitoring of the surrounding area. Especially for the JCO accident, we took an action to terminate criticality, radiation shielding and monitoring, environmental monitoring, radiation survey of the residents, radiation monitoring of exhaust air.
Abu Naser Waheed, M. M.*; Mikami, Satoshi; Kobayashi, Hirohide; Noda, Kimio
PNC TN8410 98-101, 17 Pages, 1998/09
Power Reactor and Nuclear Fuel Development Corporation (PNC) has large-area 2 gas flow counter for the purpose of measuring activity of surface sources of alpha or beta ray emitter. Surface sources are used for the calibration of radiation measuring equipment for radiation control. Due to frequent use of sources, the surface of these sources are inclined to go in bad condition because of unwanted accidental incidents. For the better calibration achievement of radiation measuring instruments the rate of emission of these sources are to be checked periodically by the large-area 2 gas flow counter. In this paper described that eight UO surface sources were selected from many sources of PNC Tokai Works and activity of these sources was measured by the 2 gas flow counter. The results were compared with the values certified by Japan Radio Isotope Association (JRIA). It is evident from the result of comparison that the surface sources are in good condition, i.e., the sources are reliable to calibrate the radiation control instruments.
Ebana, Minoru; Noda, Kimio; Kobayashi, Hirohide; Soma, Susumu; Mikami, Satoshi; Toyoda, Motoko; Oyanagi, Katsumi*
PNC TN8410 98-075, 36 Pages, 1998/07
None
; Noda, Kimio; *; *; ; ; *
PNC TN8410 98-048, 176 Pages, 1998/02
On the fire and explosion incident at the bituminization demonstration facility on March 11, 1997, thirty-seven workers were internally exposed due to activity leakage from the filling room. Maximum committed effective dose equivalent from internal exposure was estimated and found to be approximately 0.4 to 1.6 mSv based on the results of whole body counting and nuclides analysis of nose-smear samples and air-sampler filters. Maximum effective dose equivalent from external exposure was estimated and found to be approximately 4SV. The explosion broke many windows and shutters of the facility and the radioactive material was released from the openings to outside. Radionuclides of Cs, Sr, Pu, and Am were detected by the environment monitoring within the site. In Oarai site (about 20 km away from the facility), a little amount of Cs radionuclides were detected from the air-dust sample. Some soot within the facility was sampled and radionuclides were analyzed. Based on the above information, the amount of released activities by the incident was evaluated and found to be approximately 1 to 4 GBq activity (principally Cs with 10% Cs excluding C) and 610910 GBq activity. Maximum committed effective dose equivalent to the public by the above amount of activity release was evaluated and found to be approximately 110 to 2 10 mSv.
Koyama, Kenji; ; Kamimura, Katsuichiro; Ikegami, Tetsuo; Noda, Kimio
PNC TN8440 96-001, 131 Pages, 1995/12
None
Yamamoto, Ken; Kobori, Tetsuo; Kanegae, Naomichi; Ozawa, Kenji; Komiya, Kazuyoshi; Tsubota, Toshihide; Nakashima, Fumiaki; Noda, Kimio; Suzuki, Takeo; Yoshino, Kenichi; et al.
PNC TN2450 93-001, 190 Pages, 1993/03
no abstracts in English
*; *; *; Noda, Kimio; Ebana, Minoru*; Maruo, Yoshihiro; Kobayashi, Hirohide*; *
PNC TN843 83-13, 56 Pages, 1983/11
None
*; Kishimoto, Yoichiro; *; Noda, Kimio; Kanamori, Masashi
PNC TN841 82-53, 185 Pages, 1982/10
no abstracts in English
*; Saito, Setsuko*; Noda, Kimio; Koizumi, Katsuzo
PNC TN843 77-07, 19 Pages, 1977/08
None
Kobayashi, Hirohide; Kanamori, Masashi; Noda, Kimio; Izaki, Kenji; Miyabe, Kenjiro;
Nihon Genshiryoku Gakkai-Shi, ,
None