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[en] The auxiliary vacuum tube used for helium leak detection has been designed. The aim is to increase measured leak test sensitivity of existing helium leak detection system from the level of 10-3∼10-5 standard cm3/second to 10-8∼10-10 standard cm3/second. The goals of installed auxiliary vacuum tube in the existing leak detection system are used for quality control test product of Fission Product Molybdenum (FPM) capsule and AgInCd safety control rod. The design requirements were established based on both of their quality control test requirement to assure their safety and reliability. The vacuum tube length was designed at least as long as 100 cm with 6 inch diameter and have leakage tightness till as low as 1010 standard cm3/second. The temperature and pressure could be controlled up to 100oC and negative pressure 10 inch Hg respectively. The vacuum tube was equipped with temperature controller system consisting of covered heater and installed 3 thermocouples which were evenly distributed along the length of tube. Pressure control system controls the inside pressure vacuum tube according to prior setpoint values. Vacuum tube temperature and pressure were controlled using combination of both prior its set-up temperature and pressure. Aluminum disks were installed at the end of covered heater used for cooling system and to protect heat hazard to operator. (author)
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Geni Rina Sunaryo; Sony Tjahjani, D.T.; Anhar Riza Antariksawan; Sudarno; Djoko Hari Nugroho; Roziq Himawan; Ari Satmoko; Histori; Sumijanto (Centre for Development of Nuclear Safety Technology, National Nuclear Energy Agency, Serpong (Indonesia)) (eds.); Centre for Development of Nuclear Safety Technology, National Nuclear Energy Agency, Serpong (Indonesia); 278 p; ISSN 1410-0533; 
; Feb 2003; p. 196-210; 8. Scientific Presentation on Nuclear Safety Technology; Presentasi Ilmiah Teknologi Keselamatan Nuklir VIII; Serpong (Indonesia); 26-27 Feb 2003; Also available from Center for Development of Nuclear Informatics, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX 4274, Jakarta (ID); 7 refs.; 2 tabs.; 5 figs.
; Feb 2003; p. 196-210; 8. Scientific Presentation on Nuclear Safety Technology; Presentasi Ilmiah Teknologi Keselamatan Nuklir VIII; Serpong (Indonesia); 26-27 Feb 2003; Also available from Center for Development of Nuclear Informatics, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX 4274, Jakarta (ID); 7 refs.; 2 tabs.; 5 figs.