@article{oai:nifs-repository.repo.nii.ac.jp:00010776,
 author = {NAKANISHI,  Hideya and Yokota,  Mitsuhiro and Aoyagi, Miwa and Ohsuna,  Masaki and Ito, Tatsuki and Imazu,  Setsuo and NONOMURA,  Miki and OGAWA,  Kunihoro and ISOBE,  Mitsutaka and Akata, Naofumi and TANAKA,  Masahiro and SAZE, Takuya and NISHIMURA,  Kiyohiko and Hayashi,  H. and MIYAKE,  Hitoshi and Ogawa,  Hideki and MAENO, Hiroya and EMOTO,  Masahiko and YOSHIDA,  Masanobu and Kawamura, T. and SAKAKIBARA,  Satoru and Ishiguro,  Seiji and OSAKABE,  Masaki},
 journal = {Fusion Engineering and Design},
 month = {Apr},
 note = {0000-0001-6388-4489, The Large Helical Device (LHD) successfully started the deuterium experiment in March 2017, in which further plasma performance improvement is envisaged to provide a firm basis for the helical reactor design. Some major upgrades of facilities have been made for safe and productive deuterium experiments. For radiation safety, the tritium removal system, the integrated radiation monitoring system, and the access control system have been newly installed. Each system has new interlock signals that will prevent any unsafe plasma operation or plant condition. Major interlock extensions have been implemented as a part of the integrated radiation monitoring system, which also has an inter-connection to the LHD central operation and control system. The radiation monitoring system RMSAFE (Radiation Monitoring System Applicable to Fusion Experiments) is already operating for monitoring γ(X)-rays in LHD. Some neutron measurements have been additionally applied for the deuterium experiments. The LHD data acquisition system LABCOM can acquire and process 24 h every day continuous data streams. Since γ(X)-ray and neutron measurements require higher availability, the sensors, controllers, data acquisition computers, network connections, and visualization servers have been designed to be duplicated or multiplexed for redundancy. The radiation monitoring displays in the LHD control room have been carefully designed to have excellent visual recognition, and to make users immediately aware of several alerts regarding the dose limits. The radiation safety web pages have been also upgraded to always show both dose rates of γ(X)-rays and neutrons in real time.},
 pages = {259--262},
 title = {Integrated radiation monitoring and interlock system for the LHD deuterium experiments},
 volume = {129},
 year = {2018}
}