candu reactor pdf

tary reactor-physics design of CANDU reactors is presented, and the associated neutron energy spectrum is discussed. 0000002427 00000 n CORE MELTDOWNS IN CANDU REACTORS – KNOWN FACTS 1 compiled by G. Edwards Ph.D., President, Canadian Coalition for Nuclear Responsibility QUOTATIONS FROM: The Safety of Ontario’s Nuclear Reactors (1980) by the Select Committee on Ontario Hydro Affairs (Ont. The 2 0000000885 00000 n endobj The incentive for such a study is the possibility of improving the uranium resource utilization and reducing costs. 0000004216 00000 n 0000002307 00000 n 6 0 obj 0000001591 00000 n tary reactor-physics design of CANDU reactors is presented, and the associated neutron energy spectrum is discussed. endobj %'Fs�������v��n���A��sn�%�7����R�$*�j�w�� ��۲���xL��%�%��#~v�\i�? CANDU, short for Canada Deuterium Uranium, is a nuclear reactor that uses heavy water as a moderator and coolant and natural uranium as a fuel source. 0000008072 00000 n Reactor Dynamics – December 2016 CHAPTER 5 Reactor Dynamics prepared by Eleodor Nichita, UOIT and Benjamin Rouben, 12 & … %���� This feature makes the in-core fuel This feature makes the in-core fuel management substantially different from that in reactors that must be refuelled during shut- 0000005322 00000 n x��Wms�F����>�2�wI�g0����qm����Jd��#� ����$����X0b��yv�vI������/F�����ѐ|�v8�s.��! 0000001613 00000 n Advanced CANDU Reactor ACR-700 • Builds on CANDU 6 design, project and operational experience • Retained traditional CANDU features: – Modular horizontal fuel channel – Fuel bundle design – Low temperature, low pressure heavy water moderator – On-power fueling – Passive shutdown systems in low pressure moderator CANDU stations use experts in health physics, radiation protection, shielding, and environ-mental safety to ensure that reactor operations comply with Canadian regulations in a safe and controlled manner. It concludes with some . CANDU Nuclear Reactor - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. The chapter includes a note on the advantages of the CANDU reactor compared with other water cooled reactors and a general review of reactor safety as applicable to most water cooled reactors. 0000001995 00000 n endobj The CANDU 3 … emphasis is placed on the CANDU 600 MW(e) design. Participants in the workshops are provided with instruction and practice in using the simulator, thus gaining insight and understanding of the design and operational characteristics of ACR-700 nuclear power plant systems in normal and accident situations. It is somewhat an accident of history that Canada focussed all her nuclear power development effort on heavy water reactors. UNRESTRICTED TDS1 -105 I I | CANDU NUCLEAR POWER SYSTEM I • ABSTRACT IThis report provides a comprehensive summary of the many components that make up a CANDU reactor. 0000002249 00000 n The CANDU® Small Modular Reactor (SMR) is the only all-Canadian – and most mature – SMR design available today to help the Government of Canada reach its goal of Net Zero by 2050. 2 0 obj The CANDU-HWR uses a heavy water radial reflector. This report presents the example of transport and extracts potential lessons to be drawn for international harmonization of reactor design and approaches to licensing. Virtually all the systems in a nuclear power plant contain an instrumentation and control element. reactors, arguably present a similar driver today for reactor design standardization and harmonized approaches to licensing. A twin AFCR saves up to 13 Chapter 5 Reactor Dynamics (pdf 1.5kb) by Dr. Eleodor Nichita and Dr. Benjamin Rouben , as of 2017.03.21. CANDU reactor. These reactors are heavy water cooled and moderated pressurized water reactors. The heat transport system (HTS) circulates the coolant through the reactor to remove the heat of fission from the fuel. reactor. characteristics of the very successful CANDU 6 reactor. CANDU Reactor Fuel Cycle Flexibility: › - CANDU Fuel Cycle Advantages › - Operational Reactors (NUE) › - CANDU Reactor Inherent Safety Features › - New Build Reactors (AFCR) › - Future With Water Coolant › Dr. S. Kuran › VP, Advanced Fuel CANDU Reactor Workshop on Advanced Reactors… The use of natural uranium fuel in our EC6 reactors permits fuel cycle independence and avoids having to . The development of the first CANDU reactor began in 1954 through a partnership between Atomic Energy of Canada Ltd., Ontario Hydro and the Canadian General Electric Company. Major I emphasis is placed on the CANDU 600 MW(e) design. pressure tube reactor. The EC6 offers reliability, flexibility in operation to load follow and the ability to be connected to most grids of most countries • Proven CANDU reactor strengths include: 9 9 The last seven CANDU reactors have been built on budget and on or ahead of schedule Advanced safety features that go above and beyond 0000002368 00000 n Nuclear Power-> Nuclear Power Plant-> Types of Reactors-> CANDU - Heavy water reactor. FUTURE TRENDS IN THE DESIGN OF CANDU REACTORS by J.T. The design utilizes natural uranium fuel, computer-controlled operation, and on-line refueling. The choice of D 2 O as the moderator also allows other fuel cycles to be used in CANDU reactors. stream One fuelling machine inserts new fuel bundles into the fuel channel, in the same direction as the flow of coolant in that channel, left to right in this diagram. Reactor Although some of the material presented is common to other reactor types, the design details described pertain to the CANDU reactor. endstream In 1985 four of the top ten reactor units in the world were CANDU reactors operating in South Korea and Canada. Built on proven Canadian technology, this Reactor-Physics Analysis Basis for Current CANDU Presentation to US NRC 2002 December B. Rouben Manager, Reactor Core Physics AECL, Sheridan Park Pg 2 Purpose The objectives of this presentation are to: • discuss the basic design features of the current 307,1980 I I I FIGURE 1.2-10 CUMULATIVE LOAD FACTORS FOR REACTORS OVER 500 MW(e) TO END OF SEPTEMBER 1960 %PDF-1.5 Subsequently, more general core modelling concepts are presented, including the two-step approach to neutronics calculations: multi-group lattice transport calculations, followed by full-core, few-group diffusion calculations. CANDU 6.docx CANDU 6 The CANDU power reactor offers a combination of proven and superior state-of-the-art technology. Each end shield comprises an inner and an outer tubesheet joined by lattice tubes at 1.1 Overview Experts in Canada deuterium-uranium (CANDU) reactor, boiling water reactor (BWR), pressurized water reactor (PWR), and water moderated, water cooled energy reactor (WWER) plants are documented in the reports. <> The mean flight path length of a neutron between collisions (the “mean The CANDU reactor system has proven itself to be a world leader in terms of station availability and low total unit energy cost. About 4% of the reactor thermal power appears in the moderator, due to gamma radiation, the slowing down of fast neutrons, and heat transferred from the fuel channels. endobj This feature is unique to CANDU reactors. The CANDU (Canada Deuterium Uranium) is a Canadian pressurized heavy-water reactor design used to generate electric power. Research and initial drafting by Albert Lee (AG As mentioned above, the hot heavy water coolant must transfer the heat to a steam generator, which can then boil the water and send steam to a turbine section. 3 0 obj reactor. Figure 1-1 illustrates how CANDU reactors produce electricity. 0000008050 00000 n It concludes with some technical details of the proposed Advanced CANDU reactor for comparison with existing commercial CANDU reactors. 0000002544 00000 n A slow or thermal neutron, possessing a speed of approximately 2200 mis, is absorbed in a Uranium-235 nucleus. CANDU reactors. Candu Reactor Severe Accident Analysis For Accident Management CANDU reactor is provided with safety features for severe accidents mitigation: two independent shutdown systems, moderator system and the shield tank to remove the reactor decay heat in case of unavailability of other heat sinks. Chan, K.T. ������^� AeIa����e��؟EE��������op6���۠��2��[�d�֙0��N��/�S��A1�Ԝơ�K{��5lH͸l�+�)W��~�8�d�|QD��dn�]�� CANDU plant (some, but not all, of which are retained in the ACR design), • present the computer programs used in reactor physics, and • describe some of the more important modelling and analytical capabilities of the reactor-physics toolset. For various outer zone enrichments and inner zone <>>> CANDU Refuelling is carried out with the reactor at power. reactor, known as the Advanced CANDU Reactor (ACR-700 MWe) simulator. Chapter 6 Thermalhydraulic Design (pdf 11.4Mb) by Dr. Nikola K. Popov, as of 2017.03.12 Chapter 7 Thermalhydraulic Week 2 - Dynamic Characteristics of CANDU Reactors 5-10 H:\Violeta 1 – Word\web\Dynamic Characteristics of CANDU Reactors The CANDU-HWR uses a heavy water radial reflector. Instead of using a single large reactor vessel as in a PWR or BWR, the … In nuclear reactor PSAs, risk is usually defined by the frequency and magnitude of radioactive releases to the environment. CANDU-PHW reactor core by introducing an annulus of enriched uranium around the central region of natural uranium. 10.0 Define the following and state how they arise: 25 No. which lead to the steady-state condition in a CANDU nuclear reactor. These were invented and developed in Canada in the 1960’s, when Canada decided that they did not want to build enrichment plants … Dunn, J.J. Lipsett, M.J.F. The CANDU reactor design (or PHWR – Pressurized Heavy Water Reactor) has been developed since the 1950s in Canada, and more recently also in India. 4 0 obj The various commercial large power producing reactors are identified and described 0000002084 00000 n 0000001068 00000 n Frontmatter (pdf 78kb) as of 2016.12.27; Prologue - CANDU in Context (pdf 1.5Mb) by Dr. William J. Garland, as of 2014.09.18; Chapter 1 Introduction to Nuclear Reactors (pdf 700kb) by Dr. Robin Chaplin, as of 2016.09.08 Appendix - Historical Background (pdf 846kb) by Dr. Robin Chaplin, as of 2016.09.08 The Advanced Fuel CANDU Reactor (AFCR ) is a Generation III advanced fuel-efficient 740 MWe-class Pressurized Heavy Water Reactor developed by Candu Energy, a member of the SNC-Lavalin Group and China National Nuclear The reactor … 0000001207 00000 n It was designed specifically for electricity production, unlike other major reactor types that evolved from other uses. The Advanced Fuel CANDU Reactor (AFCR™) is a Generation III advanced fuel-efficient 740 MWe-class Pressurized Heavy Water Reactor developed by Candu Energy, a member of the SNC-Lavalin Group and China National Nuclear Corporation. <>/XObject<>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 0000002488 00000 n This focused development is one of the reasons that CANDU … . D �D)�:� ]AK�,�e�!�=���KN������mR�5�$�AO� >�M��������b�>�i 8]�20��q�&�L���h�dJ�������`�4IfJQ�۫�iY���f�z��.AL Cqz��L���Xf+�p�}��{ǟo[qE� ��E�s��5a�D�3\�Z2r3�CFn�8E�!�TIUb `�D ��Hz��_��f�Z��I{� �,J�n|�Q� �$����[�h���U�Q�����,�~�*F�gU)�*����P����I�����(�b���\���l3�Ɩ�\�l��UQ��P9��Yu����C&̋�ȭ����|eݽ�0� �����g�5��D��� �e�A_uB��r9Ou�h�BDz�e�ko�J�n��S?P큕�E���9� lR���{�g�)X�eƭXJ��4�. INDEX Section Page 1 Introduction 1 2 Fuel Design 1 … CANDU reactors have two independent shutdown systems that can be actuated by the in-core reactor protection system and that are able to effect a rapid reactor shutdown. CANDU-9 Simulator CANada Deuterium Uranium Reactor Simulator The CANDU-900 MWe Compact Simulator was originally developed to assist Atomic Energy of Canada Limited (AECL) in the design of the plant display system. This reflector also has an important effect on reactor dynamics because of its very long diffusion length. 1 0 obj A CANDU* reactor is a heavy-water-moderated power reactor of the general type developed in Canada by Atomic Energy of Canada Limited (AECL). 1. 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