МАКЕТ CRITICAL FACILITY (HEAVY WA TER ZERO-POWER REACTOR)

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I ц 3.б. A.I.ALIKHANOV iг{stitute FoR THEORETICAL AND EXPERIMENTAL PHYSICS l l 721 8, Моsсоц,, Bolshaya ChererTrrshkinskaya, 25 Теlерhопе: (499) 123-80-93 Fах: (499) 127-08-ЗЗ http :// п,r,"ri,. itep.

1 I ц 3.б. A.I.ALIKHANOV iг{stitute FoR THEORETICAL AND EXPERIMENTAL PHYSICS l l 721 8, Моsсоц,, Bolshaya ChererTrrshkinskaya, 25 Теlерhопе: (499) Fах: (499) ЗЗ http :// п,r,"ri,. itep.ru.,ff, E-mai Federal State-Funded Organization l : director(@itep.ru "State scientific center of the Russian Federation A.I. Alikhanov Institute fоr Theoretical and Experimental Physics" (ITEP) is а world-known multi-discipline scientific сепtец а leader in the A.I. ALlKHANov. МепtЬеr rlf the USSR Academv oj' Scieпces field оfпuсlеаr and parlicle physics, astrophysics, mathematical physics, solid-state radiation physics, ion-beam physics, medical physics, and physics of safe пuсlеаr power plants. YU.F, KoZLo\,. Dr. Sc. (Tech.), РrоJёssоr, Director ф ITEP particle physics, пuсlеаr physics and condensedmаttеr physics. 2. А heavy-water critical facility (zero-power rеасtоr), з. А ITEP headquarters Since 2011, Ьу а Russian Govemment оrdец the National Research Center "Kurchatov Institute" has exercised the functions and powers as the ITEP founder on behalf of the Russian Federation. ITEP supports and evolves the national system of knowledge in the field of пuсlеаr science, engineering and technologies. ITEP possesses а unique experimentation frаmеwоrk, which is employed primarily to investigate the fundamental properties of matter and offers а broad rапgе of development capabilities to support the prime tasks of the nuclear industry. At present time, the Institute includes the following base facilities: 1. The ITEP-T\,N integrated acceleration and accumulation Гасi l ity. comprising: а proton ассеlеrаtоц U-10, fоr the energy 10 GеЧ а multipurpose hadron faciliц IТЕР-Т\,Ъ{, for ion acceleration and accumulation; а linear high-curtent proton ассеlеrаtоr for the energy 24 MeV; а medical facility for proton l therapy of МАШТ. center for nuclear-scale research in condensed-matter radiation physics and reactor material science. The proton-beam medical center set up at the ТVN faciliф, which uses radiobiological methods of thetapy for malignant tumors, is the second largest in the world in the volume of medical services provided. The МАКЕТ zero-power rеасtоц which is part of the heavy-water nuclear reactors depaftment, is used fоr physical and mathematical modeling of the production heavy-water rеасtоr соrе. It is also where work is continued to decommission the TVR heavy-water reactor. ITEP has taken part in many international experiments at the largest foreign colliders and SLAC, JNAF, Наdrоп Соllidец Large LHC GSI, SIS/ESR, - ассеlеrаtоrs (КЕК, TEVATRON, FAIR). ITEP is Russia's and worldwide leader in а пumьеr of research activities, including search for and research into the properties of dark material, neutrino oscillation experiments, search fоr neutrinoless double beta decay and neutrino magnetic moment. The world's highest detector sensitivity and the best ечеr neutrino magnetic moment existence limit wеrе achieved in the neutrino magnetic moment measurement Kalinin NPP. oncologic diseases; at the unique experimental facilities for rеsеаrсh in matter high energy density physics, elementary ITEP's efforts аrе undertaken within the frameworks of Rosatom's long-term рrоgrаm

МАКЕТ CRIТICAL FACILIТY (HEAVY-WATER ZERO-POWER REACTOR) ITEP's nuclear research facility CF 1976 Apart from research in the fundameпtal properties of matter, IТEP's activities include applied

Program "Assurance of Nuclear and Radiation Safety for 2008-2015", "Research and Development in Top-Priority Evolution Fields of Russia's Scientific and Technological Complex for 2017-2012", and

For the ongoing decade, the evolution program for IТEP's integrated acceleration facility envisions the following: raising consideraьly the efficiency of the integrated facility utilization,

2 МАКЕТ CRIТICAL FACILIТY (HEAVY-WATER ZERO-POWER REACTOR) ITEP's nuclear research facility CF 1976 Apart from research in the fundameпtal properties of matter, IТEP's activities include applied scientific research and development work in top-priority evolution fields of science, technology and engineering in power and energyln operation 36 *Aso/2012 of activities and the Federal Target Program "Assurance of Nuclear and Radiation Safety for ", "Research and Development in Top-Priority Evolution Fields of Russia's Scientific and Technological Complex for ", and "Scientific and Educational Research Staff oflnnovative Russia". saving, and in creation of the nanosystems and nanomaterials industry. For the ongoing decade, the evolution program for IТEP's integrated acceleration facility envisions the following: raising consideraьly the efficiency of the integrated facility utilization, including ion therapy, radiobiological research, radiation stability tests of electronic components, research in physics of shock-wave processes, relativistic nuclear physics and physics of dense baryonic matter. МАКЕТ CRITICAL FACILITY (HEAVY WA TER ZERO-POWER REACTOR) The МАКЕТ heavy-water critical facility (CF) was put into operation in March 1977 (fust criticality was achieved on ). The МАКЕТ CF was built as а physical model of production reactor facilities and is intended for research on neutronic core parameters of the heavy-water reactor facilities in operation and under design. МАКЕТ CF building Maximum CF power Main performance of the МАКЕТ CF rated kw design... l kw Moderator... Heavy water Coolant (no forced heat removal)... Heavy water Reflector... Heavy water Maximum flux*:.... themшl neutron flux** cm 2 s ' fast neutron fiux**... З 10 8 cm 2-s 1 Maximum number ofcps rods: automatic control (АС)... 1 emergency protection and extra absorption (ЕР and ЕА)... 6 Number of CPS control and protection channels:..... cuпent... 6 pulse... 5 * Measu1 ed in expaiments ** Depends оп the investigated еше model

3 3-6- д].аl]кнаnоr IjiSTшUTE FoR THE)RETICAL дnd EXPERIMENTAL PHYSICS.я*тýi*ФЁ*Ёýа*, Rea(:tor п)оп1. Д l,iel,rj the lrllкет СF head asseпtlэlt, thtoughout to ensure that the moderator (healy water) is рrеsеruеd in the event the hydraulic system depressurization. Дп,апgеlпепl оf the!чц КЕТ СГ ц,slе,rш l - lower grid; 2 В-] tапk; З 5, cord сrапе : б - CPS ЕS-ЕД 8 - biological shieldiпg; I lock; 4 - bridge сrапе; 7 level gage ; апd ДС rod driyes ; B,Cl tапk; j ack pads The МАКЕТ СF was retrofitted in to give it increased operating capabilities and higher пuсlеаr safety. The reliability and stability of the CPS operution was improved, the facility's hydraulic system was upgraded and the reactoi rооm floor was hydraulically insulated The critical faciliф is deployed in а rооm, which is isolated from the control rооm and оthеr rooms in the building Ьу а biological shielding (the concrete wall thickness is -1.2 m), safety doors and а labyrinth passageway. The biological shielding is designed for the faciliф operation at up to 1 kw. То avoid the radioactivity release into the building in the event of an accident, there is а safety Ьох built очеr the critical facility. This has conditionally leak-tight walls and doors and -]***ýrý G),,, :, -.]... } _.i, ', ы]rrеýп в-з Ltц,оttt of the соlпраrll11епl; б_5 ъ, Б-4 : llдкет CI: Ьuilсliпg, sфеtу Ьох апd core decolllatttillatioп lock; baselпellt rooпls; 3 t, 1 'velltilatioп рltпi roolll" 5 сопtrоl rootll: 6, 7 laboralory rоопls; Е SсlёЬ, Ьо,; 9 соrе (юl?1раrlmепl: ]l) retlc:tor rооm

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5 3.б. А].дLIкнАNоТ INSTITL TE FоR тнеоrетiсдl дnd ЕхрЕRIмЕNтдL PHYSICS ' ' ],., The СF огfёrs capabilities fьr саrrуiпg out а Ьгоаd гапgе of static and dynamic ехреrimепts оп heavy-water multiplication The СF operating capabilities enable spacer grids and оthеr сошропепts to Ье rapidly rесопfigurеd to шоuпt the cores to Ье investigated, Local insert grids of the diameter 800 mm can Ье installed in the base Sрасеr grids fоr setting uр соrе models оr changing the grid spacing. The geometrical dimensions of the соrе tank make it possible to study full-scale core models. (sns о) The СF irtadiation volumes аrе used поrmаllу only fоr experimental rеsеаrсh; practically а11 w m /6-1ype FД; ;йý ýj]ý 0.бЗ3/6-tуре FД; \:ýi]r, Ф,.) o.aobzr-4,p" l,аt:апt LCS Лz; О ЕР ro,1 сhапп"l, } ДС rod simulator (Fe); ф shim rod siпulator; сhаппеl; о пеlllrоп sоl!гсе сhсппеl of the соrе space can Ье used as such. Different types of experimental channels installed into а fоrrпеd lattice can Ье used to iradiate samples rеquiгiпg а раrtiсulаr ffuепсе to Ье achieved, lt is also possible to fotm special cores tьr these purposes. Research into the neutronic раrаmеtеis of the rеаl heavy-water rеасtоr facility соrеs at design, commissioning and ореrаtiоп stages. The N4AKET СF had its ]ife expired Ьу the end ог Uпdеr the Requirements to the Feasibility Study fоr Extending the Specified LifЪ of Nuсlеаr Роwеr Facilities, since 2007 wоrk is under way at ITEP to evaluate if it is possible to extend the life of the N4AKET СF safety-related systems and components to очеr 30 уеаrs with their previous examination. Nuclear safety analysis fоr ореrаtiпg modes of rеаl production rеасtог facilities of the ок series, а physical rnodel of which is the МАКЕТ facility. Generation of precision ехреriшепtаl data banks for testing calculation systems. Experimental activities as pafi of joint efforls with the ISTC in 1995, 2000 and 200l for studying the physics of accelerator-driven facility biankets with miсrоmоdеls of' salt and Depending on the type of the lattice uпdеr investigation, the соrе configuration ditfers grеаtlу both in the пumьеr and iп the type of the FAs employed. As an ехаmрlе, а mар оf an investigated lattice is presented, ц,hiсh is а homogeneous соrеs. natural реrсепtаgе to 90 %. А сусlе of experimental rеsеаrсh was undertaken at the facility in to investigate the full-scale physical model of the TVR-M rеасtоr соrе. The fuel used fоr the experiments has its enrichment in 2j5U ranging broadly, frоm the тhеrе is no forced heat rеmочаl at the МАкЕт СF whiie being removed Ьу means of аir паtuгаl convection. The experiments as such at the МАКЕТ СF оссuру about 4 months реr year. The rest ofthe time is used to рrераrе fоr the ехреrimепts and саrrу out routine maintenance of the СF systems, neutronic and ореrаtiпg раrаmеtеrs of the TVR-M (upgraded heavy-water high-ltux

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