Domestic projects:

  Project with National Park Plitvice  "Investigation of influence of forest ecosystems of National Park Plitvice to the quality of water and lakes" (2003-2006 ). Partners: Faculty of Forestry, University of Zagreb, Ruđer Bošković Institute and State Hydrometoeorolgical Institute in Zagreb (responsible person for RBI: N.Horvatinčić);

  Project No. 0098014 "Natural isotopes of low-level actitivies and development of instrumentation" with Ministry of Science and Technology of the Republic of Croatia (2002-2006 ) (principal investigator: B.Obelić);

  Theme No. 00980207   "Natural radioisotopes and processes in gases"  within the scientific program "Investigations from subatomic physics", with Ministry of Science and Technology of the Republic of Croatia (1996-2002 ) (principal investigator: B.Obelić).

International projects:

Technical co-operation programme of the International Agency for Atomic Energy (IAEA) CRO/8/007 : "Using Isotope Tracers as a Tool for Groundwater Vulnerability Assessment in the County of Split, Dalmatia" (2007-2008). In co-operation with the University of Rijeka, Dept. of Fhysics of the Faculty of Medicine (principal investigator) and Faculty of Geotechnics, Varaždin (responsible person for RBI: N.Horvatinčić);

  Project INCO-CT-2006-043584 of the Commission of the European Communities within the 6^th Framework Programme entitled: "AMS-14C - Preparation of carbon samples for ¹⁴C dating by the AMS technique" (2007-2008). Partner: Ruđer Bošković Institute, Zagreb (co-ordinator: I.Krajcar Bronić);

  Regional project of the International Agency for Atomic Energy (IAEA)  RER/8/012: "Isotope methods for management  of drinking water resources in water scarcity areas" (2007-2008) (responsible person for RBI: N.Horvatinčić); 

  Project INCO-CT-2006-518697 of the Commission of the European Communities within the 6^th Framework Programme entitled: "TRAINMONHER - Valorisation of Monumental Heritage through Higher Education and Professional Training. Socioeconomic study and analysis of National Policies on EU-MED-DEV countries and EC Directives" (2006-2008). Main co-ordinator: Universitat Autónoma de Barcelona. Partners: Spain (co-ordinator) , France, Morocco, México, Argentina, Croatia (responsible person for RBI and scientific secretary of the Project:B.Obelić);

  Regional technical co-operation programme of the International Agency for Atomic Energy (IAEA) RER/1/006 : "Nuclear Techniques for the Protection of Cultural Heritage Artifacts in the Mediterranean Region" (2005-2008) (principal investigator for RBI: S.Fazinić);

  Technical co-operation programme of the International Agency for Atomic Energy (IAEA) CRO/8/006: "Application of isotope techniques in investigation of water resources and water protection in the Karst area of Croatia" (2005-2006 ). In co-operation with the University of Rijeka, Dept. of Fhysics of the Faculty of Medicine and Geotechnical faculty in Varaždin. (principal investigator: N.Horvatinčić);

 Regional project of the International Agency for Atomic Energy (IAEA) RER/0/023: "Strategic Planning for Management, Self-reliance, and Sustainability of National Nuclear Institutions" (2004-2007) (member of RBI team: B.Obelić);

  Bilateral Croatian-Slovenian project "Isotopic composition of carbon dioxyde as an indicator of atmospheric pollution" - co-operation between Rudjer Bošković Institute and   Jožef  Stefan Institute, Ljubljana (2004-2005 ) (principal investigator: I.Krajcar Bronić);

  Project ICA2-CT-2002-10009 of the Commission of the European Communities within the 6^th Framework Programme entitled: "ANTHROPOL.PROT - Study of anthropogeinic influence after the war and establishing of protection measures of National Park Plitvice and Bihać Region at the border area between Croatia and Bosnia-Herzegovina" (2003-2005 ). Co-ordinator: Universitat Autónoma de Barcelona. Partners: Universitat Autónoma de Barcelona (Bellaterra, Spain), Leibniz Institute for Applied Geosciences (Hannover, Germany), Ruđer Bošković Institute (Zagreb, Croatia), Croatian Geological Survey (Zagreb, Croatia), Geological Institute Sarajevo (Bosnia and Herzegovina) and University of Bihać (Bosnia and Herzegovina) (principal investigator for RBI: B.Obelić); 

  Bilateral Croatian-Slovenian project "Isotopes in precipitation" - co-operation between Rudjer Bošković Institute and   Jožef  Stefan Institute, Ljubljana (2001-2003 ) (principal investigator: I.Krajcar Bronić); 

  Bilateral Croatian-Slovenian project "Monitoring of anthropogenic influence in karst" - co-operation between Rudjer Bošković Institute and Jožef  Stefan Institute in Ljubljana (2001-2003 ) (principal investigator: B.Obelić); 

  Technical co-operation programme of the International Agency for Atomic Energy (IAEA) CRO/2/002: "Nuclear Spectroscopy Techniques and Ion Beam Analysis in Environmental and Industrial Applications" (2001-2002 ) .Within the frame of this project LSC Quantulus 1220 was purchased (principal investigators: M.Jakšić and B.Obelić);

  Research Contract of the International Agency for Atomic Energy (IAEA) No. 11265: "Tritium and Stable Isotope Distribution in the Atmosphere at the Coastal Region of Croatia" (2000-2002 ) (principal investigator: N.Horvatinčić); 

  Regional project of the International Agency for Atomic Energy (IAEA) RER/2/004 "Quality Control and Quality Assurance of Nuclear Analytical Techniques" (1999-2002) (principal investigator: B.Obelić); 

  Bilateral Croatian-Slovene project "Isotopic investigations of speleothems and tufa in Croatian and Slovenian Karst with the application in paleoclimatic investigations" - co-operation between Rudjer Bošković Institute and Institute for Karst Research in Postojna (1999-2001 ) (principal investigator: N.Horvatinčić).