UN Security Council
2015

channels (IIC) inside the core and twelve lateral irradiation chenna ls (LIC) just next to the outer ring of fuel assemblies. • The location of the in-core and lateral irradiation channels should be designed and fixed to meet the best anticipated performances. • Consistent with relevant section of Annex 1, subsidiary laboratories are part of the modernization project of the Arak Research Reactor. In Addition, Annex III reinforce design and construction of subsidiary laboratories. • The highest tolerable pressure for the first and second loop is 0.33 Mpa (at the interance of the reactor pit). • The highest possible flow rate for coolant is 610 kg/s at the pressure of 0.33 MPa in the main piping system and 42 Kg/sec for Moderator with the same conditions. 15-12243 35/104 S/RES/2231 (2015) Preliminary Characteristics: Core Parameters Values Power (MW) 20 Number of fuel assemblies ~ 78 Active length (cm) ~ 110 Lattice configuration Hexagonal Fuel pellets Material UO 2 Fuel enrichment level Up to 3.67 % Clad material Zr Alloys Burnable poison Yes, if necessary Lattice pitch (cm) ~ 11