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[en] One of the requirements in radiological safety in the operating condition of research reactor are the absence of radionuclide from fission product released to reactor cooling water and environment. Early detection of fission product that released from fuel element can be done by monitoring radioactivity level on primary cooling water.Reactor cooling water can be used as an important indicator in detecting radioactivity level of material fission product, when the leakage occurs. Therefore, it needs to build a monitoring system for measuring radioactivity level of cooling water directly and simple. The idea of this system is counting radioactivity water flow from reactor tank to the marinelli cube that attached to the HPGe detector on gamma spectrometer. Cooling water from tank aimed on plastic pipe to the marinelli cube. Water flows in gravitational driven to the marinelli cube, with volume flow rate 5.1 liters/minute in the inlet and 2.2 liters/minute in output. (author)
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Duyeh Setiawan; Rochestri Sofyan; Nurlaila Z; Poppy Intan Tjahaja; Efrizon Umar; Muhayatun; Nanny K Oekar; Sudjatmi K Alfa; Dani Gustaman Syarif; Didi Gayani; Djoko Hadi P; Saeful Hidayat (National Nuclear Energy Agency, Bandung (Indonesia)); Ari Darmawan Pasek; Nathanel P Tandian; Toto Hardianto (Bandung Institute of Technology, Bandung (Indonesia)) (eds.); Centre for Nuclear Technology Material and Radiometry, National Nuclear Energy Agency (Indonesia); 386 p; ISSN 1858-3601; 
; Nov 2009; p. 215-220; National Seminar in Nuclear Science Technology; Seminar Nasional Sains dan Teknologi Nuklir; Bandung (Indonesia); 3 Jun 2009; Also available from Center for Nuclear Technology Material and Radiometry, National Nuclear Energy Agency, Jl. Tamansari 71, Telp. 62-22-2503997 Fax. 62-22-2504081, Bandung 40132 (ID); 5 refs.; 5 figs.
; Nov 2009; p. 215-220; National Seminar in Nuclear Science Technology; Seminar Nasional Sains dan Teknologi Nuklir; Bandung (Indonesia); 3 Jun 2009; Also available from Center for Nuclear Technology Material and Radiometry, National Nuclear Energy Agency, Jl. Tamansari 71, Telp. 62-22-2503997 Fax. 62-22-2504081, Bandung 40132 (ID); 5 refs.; 5 figs.