Residual doses with 400 MeV injection energy at J-PARC rapid cycling synchrotron

Yamamoto, Kazami; Kinsho, Michikazu; Hayashi, Naoki

Proceedings of 5th International Particle Accelerator Conference (IPAC '14) (Internet), p.3379 - 3381, 2014/07

http://accelconf.web.cern.ch/AccelConf/IPAC2014/papers/thpme063.pdf

Last summer shutdown an injection energy of J-PARC rapid cycling synchrotron was upgraded from 181 MeV to 400 MeV to aim for reduction of the space charge effect during injection period. By the commissioning after the shutdown, 300 kW operation condition was established. In this condition, the doses of most areas were kept at the same level as 181 injection energy operation or decreased except to the injection foil chamber, 100 degrees and H dumps.

Detailed investigation on the environmental effects from the liquid effluent of JNC reprocessing plant (IV); (April, 1996March, 2000)

; Shinohara, Kunihiko; ; ; ; Isozaki, Tokuju; ; *

JNC TN8440 2000-003, 93 Pages, 2000/08

JNC-TN8440-2000-003.pdf:2.2MB

The investigation on the radioactivity concentration for gross beta, H and Cs in seawater collected around the discharge point had been performed in order to grasp the change of the activity level of the coastal seawater offshore the JNC Tokai Works from the low level liquid effluent of the reprocessing plant. After the investigation on the radioactivity in seawater during the hot examination, the detailed investigation on the environmental effects from the liquid effluent of JNC reprocessing plant has been performed since July 1978 on the basis of the request from Ibaraki prefecture as the full-scale operation of the reprocessing plant. Consequently, no increase of the radioactive concentration due to the discharged effluent has been observed. And also, as the result of the consideration to the investigation on the environmental effect from the liquid effluent throughout 22 years since 1978, no change of the radioactive concentration level in seawater was recognized.

Progress with tests on melting of low-level metallic waste at JAERI

Fujiki, Kazuo;

EUR-15691, 0, p.133 - 146, 1994/00

no abstracts in English

Induced radioactivities in silicon and germanium irradiated with high-energy heavy ions

IEEE Transactions on Nuclear Science, NS-31(1), p.316 - 319, 1984/00

no abstracts in English