Draft Safety Analysis Report for the Vrbina Krško LILW Repository 4-1/100 ARAO 02-08-011-004, Revision 5 Procurer: Document: NSRAO2-POR-030 ARAO REPUBLIC OF SLOVENIA č č identification 02-08-011-004 Gregor i eva ulica 20, 1000 code: Ljubljana Date: March 2019 By authorisation of: Revision: 5 ARAO, Ljubljana Celovška cesta 182, 1000 Ljubljana Number of copies: Facility: Vrbina Krško LILW repository Contractor: ARAO, Ljubljana Contractor’s project mag. Sandi Viršek, univ. dipl. inž., geoteh. in rud. manager: Document title: Draft Safety Analysis Report for the Vrbina Krško LILW repository Chapter 4 Assessment of the area of the repository site Draft Safety Analysis Report for the Vrbina Krško LILW Repository 4-2/100 ARAO 02-08-011-004, Revision 5 DOCUMENT HISTORY Date of Brief description of changes relative to Revision: Notes: (previous) the previous version: revision: 1 May 2017 amendment of the document following review 2 January 2018 amendment of the document following review by an approved nuclear and radiation safety expert 3 November 2018 amendment following review by SNSA 4 February 2019 amendment following review by SNSA 5 March 2019 Supplementing of application Draft Safety Analysis Report for the Vrbina Krško LILW Repository 4-3/100 ARAO 02-08-011-004, Revision 5 ABBREVIATIONS AND TERMS ARAO - Agency for Radwaste Management ARSO - Slovenian Environment Agency CRO - Spodnji Stari Grad Waste Management Centre DOF – digital ortophotograph DPN - Državni prostorski na črt za Odlagališ če NSRAO Vrbina, Krško EPO - an ecologically important area, i.e. an area containing a habitat type, a portion of a habitat type or of a larger ecosystem unit that materially impacts the preservation of biodiversity GURS - Surveying and Mapping Authority of the Republic of Slovenia HE - hydroelectric plant IG unit - engineering geological layer of similar properties KOSTAK - municipal utilities and building company that provides local public utility services and performs market (commercial) activities MOP - Ministry of the Environment and Spatial Planning M4 – geological layers (Badenian age) M5–7 - geological layers (Sarmatian to Lower Pontian age) M7 - geological layers (Pontian age) N, E, W, S - directions of the sky: north (N), east (E), west (W) and south (S) NATO - North Atlantic Treaty Organization Natura 2000 - a European network of special protected areas that were determined by the EU member states with the primary objective to preserve biodiversity for future generations NPP - Krško Nuclear Power Plant LILW - low and intermediate level waste NV – a natural asset, which, in addition to being a rare, valuable or renowned natural phenomenon also comprises other phenomena of value, a part of life science (animate) or physical (inanimate) science, a natural area or a portion of natural area, an ecosystem, landscape or formed nature Disposal facility - disposal silo Draft Safety Analysis Report for the Vrbina Krško LILW Repository 4-4/100 ARAO 02-08-011-004, Revision 5 osnVP - Draft Safety Analysis Report for the Vrbina Krško LILW repository (Osnutek Varnostnega poro čila za odlagališ če NSRAO Vrbina, Krško) pH – concentration of oxonium ions in the solution PISO - Municipal spatial planning information system Pl,Q - geological Upper Pliocene and Lower Pleistocene layers RUŽV - Žirovski vrh uranium mine TE - thermal power plant TLD - thermoluminescent dosimeter SNSA - Slovenian Nuclear Safety Administration Decree on the DPN - Decree on the detailed plan of national importance for the low- and intermediate-level radioactive waste repository at Vrbina in the Municipality of Krško, Official Gazette of the RS, 114/09 VGL - High resolution gamma spectrometry VIPAP - the VIPAP cellulose plant (Tovarna VIPAP Videm Krško d.d.) VOG - deep boreholes (140–170 m) VOP - shallow borehole (up to 30 m) VP - Safety Analysis Report for the Vrbina Krško LILW repository VVO - water protection area ZVD - Occupational Safety Institute QPMF – flow rate (peak flow) in maximum probable floods Q100 – flow rate (peak flow) during 100-year floods Q2 – geological Holocene layers Draft Safety Analysis Report for the Vrbina Krško LILW Repository 4-5/100 ARAO 02-08-011-004, Revision 5 CONTENT 4 ASSESSMENT OF THE REPOSITORY SITE AREA .................................................................................. 6 4.1 GENERAL ................................................................................................................................................... 6 4.2 REFERENCE DATA ON THE AREA OF THE REPOSITORY SITE ..................................................................................... 9 4.3 HYDROLOGY ............................................................................................................................................. 24 4.3.1 SURFACE-WATER HYDROLOGY ........................................................................................................ 24 Earthquake parameters ................................................................................................................................ 26 4.3.2 HYDROGEOLOGY ............................................................................................................................. 30 4.4 METEOROLOGY ......................................................................................................................................... 38 4.4.1 Precipitation .................................................................................................................................... 38 4.4.2 Evaporation and evapotranspiration .............................................................................................. 39 4.4.3 Temperature .................................................................................................................................... 39 4.4.4 Air humidity ..................................................................................................................................... 40 4.4.5 Wind ................................................................................................................................................ 40 4.4.6 Diffusion .......................................................................................................................................... 41 4.4.7 Atmospheric stability ....................................................................................................................... 41 4.4.8 Exposure to sunlight ........................................................................................................................ 42 4.4.9 Long-term climate change............................................................................................................... 42 4.5 GEOLOGY AND SEISMOLOGY ........................................................................................................................ 43 4.5.1 Geological characteristics of the site ............................................................................................... 43 4.5.2 Seismological characteristics of the site .......................................................................................... 55 4.6 RADIOLOGICAL CHARACTERISTICS OF THE AREA OF THE REPOSITORY SITE AND PRE -OPERATIONAL RADIOLOGICAL MONITORING STATE ................................................................................................................................... 64 4.6.1 Radiological and geochemical characteristics ................................................................................. 64 4.6.2 Silt properties .................................................................................................................................. 65 4.6.3 Chemical composition and radiological characteristics of groundwater ........................................ 66 4.6.4 PRE-OPERATIONAL RADIOLOGICAL MONITORING AT THE LILW REPOSITORY SITE AND ITS SURROUNDINGS ........................................................................................................................................... 69 4.6.5 Chemical composition of surface water .......................................................................................... 90 4.7 ASSESSMENT OF RISKS CHARACTERISTIC OF THE AREA OF THE REPOSITORY SITE ...................................................... 91 4.8 IMPACT OF NEIGHBOURING FACILITIES ON THE REPOSITORY ................................................................................ 93 4.8.1 Krško Nuclear Power Plant .............................................................................................................. 93 4.8.2 Brestanica Thermal Power Station .................................................................................................. 93 4.8.3 VIPAP ............................................................................................................................................... 94 4.8.4 Cerklje ob Krki Military Airport ........................................................................................................ 94 4.8.5 Other facilities and infrastructure ................................................................................................... 96 4.9 IMPACT OF INTERNAL EVENTS ON REPOSITORY SAFETY ....................................................................................... 97 4.10 THE APPROPRIATENESS OF THE AREA OF THE REPOSITORY SITE FOR THE PROVISION OF PROTECTION AND RESCUE IN THE EVENT OF EMERGENCIES ............................................................................................................................