National Research Center Kurchatov Institute B P Konstantinov

National Research Center "Kurchatov Institute" B. P. Konstantinov Petersburg Nuclear Physics Institute (PNPI). Russia, 188300, Leningrad district, Gatchina, Orlova roscha IAEA-CN-231 -179 PIK Reactor: Updating the Reactor Core. Kovalchuk M. V. 1, Aksenov V. L. 1, Konoplev K. A. 1, Smolsky S. L. 1, Dragunov Y. G. 2 , Lopatkin A. V 2, Tretyakov I. T. 2. 1 - NRC KI PNPI, Moscow, Gatchina, Russia, 2 - NIKIET, Moscow, Russia. Reporter Kir Konoplev kir@pnpi. spb. ru Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 1

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 2

Design parameters of the PIK reactor Heat power – 100 MW 1. 2∙ 1015 n/cm 2∙s in the heavy water reflector 5∙ 1015 n/cm 2∙s in the light water neutron trap (vertical channel in center of core) 1011 n/cm 2∙s at channel outlet 10 horizontal channels for neutron beam extraction Up to 50 positions for placing experimental stations Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ”

Hot neutron sources Сold neutron sources Ultracold neutron sources Neutron guides (for cold and thermal neutrons). Total length of 300 meters Cryogenic loop at liquid helium temperatures Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 4

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ”

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 6

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 7

Operational cycle duration must be increased from 2 weeks to 4 weeks. Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 8

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 9

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ”

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 11

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 12

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 13

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 14

7. 14 g 235 U 8. 57 g 235 U Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ”

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 16

Conclusion The described changes in the PIK reactor core will solve the main problem of increasing the operational cycle from two weeks to four, and will improve the reactor's research capabilities. Neutron physics computations modeling the core with improved fuel assemblies show that neutron flux in experimental channels will remain at the high level of 1‒ 5 1015 n/cm 2∙s. Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 17

Thank you for attention. Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 17

Appendix Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 19

B-10 Ca-113 Gd - 155 Gd - 157 U - 235 Natural content, 20 12 % 2200 m/s 3837 20600 barn PIK 15 spectrum 41 19063 barn WWR-M spectrum 2177 22721 barn 15 16 90 enriched 60900 254000 681 10494 41725 273 20071 78617 378 Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ” 22

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ”

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ”

Vienna, Austria 16 – 20 November 2015, IAEA-CN-231 -179, ”PIK Reactor: Updating the Reactor Core. ”