Reactor Dynamics – December 2016 CHAPTER 5 Reactor Dynamics prepared by Eleodor Nichita, UOIT and Benjamin Rouben, 12 & … 1.1 Overview Experts in CANDU-PHW reactor core by introducing an annulus of enriched uranium around the central region of natural uranium. 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. stream CANDU Nuclear Reactor - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. 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. 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. All CANDU reactors use heavy water as the moderator, in a system that is completely separate from the reactor coolant heavy water. 0000005322 00000 n <>>> After the 2nd year, the CANDU reactor begins to operate practically as a thorium burner.Very high burn-up can be achieved with the same fuel (>160,000 MW D/MT). 307,1980 I I I FIGURE 1.2-10 CUMULATIVE LOAD FACTORS FOR REACTORS OVER 500 MW(e) TO END OF SEPTEMBER 1960 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. Fuel channel pressure tubes are critical components of the CANDU reactor core which require periodic inspection to demonstrate continued fitnes s for service. Response of the Critical Reactor to a Reactivity Change 7.0 Define log rate and reactor period and state their relationship 8.0 Describe the response of a CANDU reactor at low power to a small step insertion of positive reactivity 9.0 Explain the effect of delayed neutrons on reactor control. approximately apply to the CANDU reactor. -1<1��Bk�L�P�[�!�O��D��(��*,H!�'�GU ;�2�p�{]qM�k�rbء�Z��r;����}�吣_�8�'�aE���y����ױ��;%�_��R=7+L�gu�S���Wd8�ÇQ�|:�oj1��jJ��d���5�G������0�ꓘqz�iۺ�n�#`aHЊj)�n� endstream endobj 102 0 obj 236 endobj 81 0 obj << /Type /Page /Parent 75 0 R /Resources << /Font << /F0 93 0 R /F1 95 0 R /F2 97 0 R >> /ProcSet 100 0 R >> /Contents 96 0 R /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 82 0 obj << /Count 3 /Type /Outlines /First 83 0 R /Last 84 0 R >> endobj 83 0 obj << /Title (� ������0�,L) /Parent 82 0 R /A 90 0 R /Next 85 0 R >> endobj 84 0 obj << /Title (�O��"00��}ӣ) /Prev 85 0 R /Parent 82 0 R /A 86 0 R >> endobj 85 0 obj << /Title (��+�`dT�> endobj 86 0 obj << /S /GoToR /F 87 0 R /D [ 0 /Fit ] >> endobj 87 0 obj << /Type /FileSpec /F (j�}���E����) >> endobj 88 0 obj << /S /GoToR /F 89 0 R /D [ 0 /Fit ] >> endobj 89 0 obj << /Type /FileSpec /F (��ZL�F3L���) >> endobj 90 0 obj << /S /GoToR /F 91 0 R /D [ 0 /Fit ] >> endobj 91 0 obj << /Type /FileSpec /F (��eNu���Z) >> endobj 92 0 obj << /Type /FontDescriptor /FontName /TimesNewRoman /Flags 34 /FontBBox [ -250 -240 1200 900 ] /MissingWidth 780 /StemV 73 /StemH 73 /ItalicAngle 0 /CapHeight 900 /XHeight 630 /Ascent 900 /Descent -240 /Leading 180 /MaxWidth 1000 /AvgWidth 400 >> endobj 93 0 obj << /Type /Font /Subtype /TrueType /Name /F0 /BaseFont /TimesNewRoman,Bold /FirstChar 32 /LastChar 255 /Widths [ 260 340 560 500 500 980 840 280 340 340 500 560 260 340 260 280 500 500 500 500 500 500 500 500 500 500 340 340 560 560 560 500 940 720 680 720 720 660 600 780 780 380 500 800 660 960 720 780 600 780 720 560 660 720 720 1000 720 720 640 340 280 340 580 500 340 500 560 440 560 440 320 500 560 280 340 540 260 820 560 500 560 560 420 380 340 560 500 720 480 500 420 400 220 400 520 780 560 780 560 560 560 560 560 560 560 560 560 560 560 780 560 780 780 560 560 560 560 560 560 560 560 560 560 560 560 780 560 560 260 320 500 500 500 500 220 500 360 740 300 500 560 340 740 500 400 540 300 300 340 580 540 240 340 300 340 500 760 760 760 500 720 720 720 720 720 720 1000 720 660 660 660 660 380 380 380 380 720 720 780 780 780 780 780 560 780 720 720 720 720 720 620 560 500 500 500 500 500 500 720 440 440 440 440 440 280 280 280 280 500 560 500 500 500 500 500 540 500 560 560 560 560 500 560 500 ] /Encoding /WinAnsiEncoding /FontDescriptor 94 0 R >> endobj 94 0 obj << /Type /FontDescriptor /FontName /TimesNewRoman,Bold /Flags 16418 /FontBBox [ -250 -216 1200 1040 ] /MissingWidth 340 /StemV 136 /StemH 136 /ItalicAngle 0 /CapHeight 891 /XHeight 446 /Ascent 891 /Descent -216 /Leading 149 /MaxWidth 1000 /AvgWidth 427 >> endobj 95 0 obj << /Type /Font /Subtype /TrueType /Name /F1 /BaseFont /TimesNewRoman /FirstChar 31 /LastChar 255 /Widths [ 778 250 333 408 500 500 833 778 180 333 333 500 564 250 333 250 278 500 500 500 500 500 500 500 500 500 500 278 278 564 564 564 444 921 722 667 667 722 611 556 722 722 333 389 722 611 889 722 722 556 722 667 556 611 722 722 944 722 722 611 333 278 333 469 500 333 444 500 444 500 444 333 500 500 278 278 500 278 778 500 500 500 500 333 389 278 500 500 722 500 500 444 480 200 480 541 778 500 778 333 500 444 1000 500 500 333 1000 556 333 889 778 778 778 778 333 333 444 444 350 500 1000 333 980 389 333 722 778 778 722 250 333 500 500 500 500 200 500 333 760 276 500 564 333 760 500 400 549 300 300 333 576 453 250 333 300 310 500 750 750 750 444 722 722 722 722 722 722 889 667 611 611 611 611 333 333 333 333 722 722 722 722 722 722 722 564 722 722 722 722 722 722 556 500 444 444 444 444 444 444 667 444 444 444 444 444 278 278 278 278 500 500 500 500 500 500 500 549 500 500 500 500 500 500 500 500 ] /Encoding /WinAnsiEncoding /FontDescriptor 92 0 R >> endobj 96 0 obj << /Filter /FlateDecode /Length 99 0 R >> stream 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. 1 0 obj A CANDU SMR has the potential to achieve lower capital costs relative to GW-class reactors, a shorter construction timeline of 35 months for the first unit (30 months for nth unit) and a 94% lifetime capacity factor. 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candu reactor pdf


Although some of the material presented is common to other reactor types, the design details described pertain to the CANDU reactor. <> endobj w����Rb(�J�J^$ 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 <> %PDF-1.5 CANDU reactor. 0000001908 00000 n 0000008050 00000 n This reflector also has an important effect on reactor dynamics because of its very long diffusion length. Since the early … reactor rated at 450 MWe with two steam generators and two heat transport pumps connected in series. Shutdown system number one (SDS-1) consists of which lead to the steady-state condition in a CANDU nuclear reactor. 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 0000001613 00000 n endobj Instead of using a single large reactor vessel as in a PWR or BWR, the … The reason that a steam generator is used is due to the fact that the heavy water coolant is radioactive from being in direct contact with the reactor core. The CANDU reactor system has proven itself to be a world leader in terms of station availability and low total unit energy cost. The choice of D 2 O as the moderator also allows other fuel cycles to be used in CANDU reactors. A slow or thermal neutron, possessing a speed of approximately 2200 mis, is absorbed in a Uranium-235 nucleus. 0000001207 00000 n The various commercial large power producing reactors are identified and described A CANDU* reactor is a heavy-water-moderated power reactor of the general type developed in Canada by Atomic Energy of Canada Limited (AECL). The mean flight path length of a neutron between collisions (the “mean The calandria is closed and supported by end shields at each end. Chapter 6 Thermalhydraulic Design (pdf 11.4Mb) by Dr. Nikola K. Popov, as of 2017.03.12 Chapter 7 Thermalhydraulic … Heavy water (D 2 O) is a natural form of water that is used as a moderator to slow down the neutrons in the reactor, enabling the use of natural uranium as fuel. 0000002427 00000 n This feature is unique to CANDU reactors. 10.0 Define the following and state how they arise: 0000002368 00000 n endobj 0000002544 00000 n INDEX Section Page 1 Introduction 1 2 Fuel Design 1 … . It concludes with some technical details of the proposed Advanced CANDU reactor for comparison with existing commercial CANDU reactors. &��l��]R�2��0J���҃�,�9�M�N"AO��Z���"l���̎ 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. 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 reactor. %PDF-1.3 %���� 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. The design utilizes natural uranium fuel, computer-controlled operation, and on-line refueling. Subsequently, more general core modelling concepts are … 0000001261 00000 n Legislature) “It is not right to say that a catastrophic accident is impossible . How and Why is CANDU designed the way it is 1 Revision 3 – February 2003 1. In nuclear reactor PSAs, risk is usually defined by the frequency and magnitude of radioactive releases to the environment. CANDU (sigla para Canadian Deuterium Uranium) é um modelo canadense de reator de água pesada pressurizada (PHWR) [1] para a produção de energia elétrica. 25 No. FUTURE TRENDS IN THE DESIGN OF CANDU REACTORS by J.T. 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. 0000001995 00000 n The CANDU reactor design (or PHWR – Pressurized Heavy Water Reactor) has been developed since the 1950s in Canada, and more recently also in India. <> Reactor Dynamics – December 2016 CHAPTER 5 Reactor Dynamics prepared by Eleodor Nichita, UOIT and Benjamin Rouben, 12 & … 1.1 Overview Experts in CANDU-PHW reactor core by introducing an annulus of enriched uranium around the central region of natural uranium. 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. stream CANDU Nuclear Reactor - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. 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. 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. All CANDU reactors use heavy water as the moderator, in a system that is completely separate from the reactor coolant heavy water. 0000005322 00000 n <>>> After the 2nd year, the CANDU reactor begins to operate practically as a thorium burner.Very high burn-up can be achieved with the same fuel (>160,000 MW D/MT). 307,1980 I I I FIGURE 1.2-10 CUMULATIVE LOAD FACTORS FOR REACTORS OVER 500 MW(e) TO END OF SEPTEMBER 1960 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. Fuel channel pressure tubes are critical components of the CANDU reactor core which require periodic inspection to demonstrate continued fitnes s for service. Response of the Critical Reactor to a Reactivity Change 7.0 Define log rate and reactor period and state their relationship 8.0 Describe the response of a CANDU reactor at low power to a small step insertion of positive reactivity 9.0 Explain the effect of delayed neutrons on reactor control. approximately apply to the CANDU reactor. -1<1��Bk�L�P�[�!�O��D��(��*,H!�'�GU ;�2�p�{]qM�k�rbء�Z��r;����}�吣_�8�'�aE���y����ױ��;%�_��R=7+L�gu�S���Wd8�ÇQ�|:�oj1��jJ��d���5�G������0�ꓘqz�iۺ�n�#`aHЊj)�n� endstream endobj 102 0 obj 236 endobj 81 0 obj << /Type /Page /Parent 75 0 R /Resources << /Font << /F0 93 0 R /F1 95 0 R /F2 97 0 R >> /ProcSet 100 0 R >> /Contents 96 0 R /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 82 0 obj << /Count 3 /Type /Outlines /First 83 0 R /Last 84 0 R >> endobj 83 0 obj << /Title (� ������0�,L) /Parent 82 0 R /A 90 0 R /Next 85 0 R >> endobj 84 0 obj << /Title (�O��"00��}ӣ) /Prev 85 0 R /Parent 82 0 R /A 86 0 R >> endobj 85 0 obj << /Title (��+�`dT�> endobj 86 0 obj << /S /GoToR /F 87 0 R /D [ 0 /Fit ] >> endobj 87 0 obj << /Type /FileSpec /F (j�}���E����) >> endobj 88 0 obj << /S /GoToR /F 89 0 R /D [ 0 /Fit ] >> endobj 89 0 obj << /Type /FileSpec /F (��ZL�F3L���) >> endobj 90 0 obj << /S /GoToR /F 91 0 R /D [ 0 /Fit ] >> endobj 91 0 obj << /Type /FileSpec /F (��eNu���Z) >> endobj 92 0 obj << /Type /FontDescriptor /FontName /TimesNewRoman /Flags 34 /FontBBox [ -250 -240 1200 900 ] /MissingWidth 780 /StemV 73 /StemH 73 /ItalicAngle 0 /CapHeight 900 /XHeight 630 /Ascent 900 /Descent -240 /Leading 180 /MaxWidth 1000 /AvgWidth 400 >> endobj 93 0 obj << /Type /Font /Subtype /TrueType /Name /F0 /BaseFont /TimesNewRoman,Bold /FirstChar 32 /LastChar 255 /Widths [ 260 340 560 500 500 980 840 280 340 340 500 560 260 340 260 280 500 500 500 500 500 500 500 500 500 500 340 340 560 560 560 500 940 720 680 720 720 660 600 780 780 380 500 800 660 960 720 780 600 780 720 560 660 720 720 1000 720 720 640 340 280 340 580 500 340 500 560 440 560 440 320 500 560 280 340 540 260 820 560 500 560 560 420 380 340 560 500 720 480 500 420 400 220 400 520 780 560 780 560 560 560 560 560 560 560 560 560 560 560 780 560 780 780 560 560 560 560 560 560 560 560 560 560 560 560 780 560 560 260 320 500 500 500 500 220 500 360 740 300 500 560 340 740 500 400 540 300 300 340 580 540 240 340 300 340 500 760 760 760 500 720 720 720 720 720 720 1000 720 660 660 660 660 380 380 380 380 720 720 780 780 780 780 780 560 780 720 720 720 720 720 620 560 500 500 500 500 500 500 720 440 440 440 440 440 280 280 280 280 500 560 500 500 500 500 500 540 500 560 560 560 560 500 560 500 ] /Encoding /WinAnsiEncoding /FontDescriptor 94 0 R >> endobj 94 0 obj << /Type /FontDescriptor /FontName /TimesNewRoman,Bold /Flags 16418 /FontBBox [ -250 -216 1200 1040 ] /MissingWidth 340 /StemV 136 /StemH 136 /ItalicAngle 0 /CapHeight 891 /XHeight 446 /Ascent 891 /Descent -216 /Leading 149 /MaxWidth 1000 /AvgWidth 427 >> endobj 95 0 obj << /Type /Font /Subtype /TrueType /Name /F1 /BaseFont /TimesNewRoman /FirstChar 31 /LastChar 255 /Widths [ 778 250 333 408 500 500 833 778 180 333 333 500 564 250 333 250 278 500 500 500 500 500 500 500 500 500 500 278 278 564 564 564 444 921 722 667 667 722 611 556 722 722 333 389 722 611 889 722 722 556 722 667 556 611 722 722 944 722 722 611 333 278 333 469 500 333 444 500 444 500 444 333 500 500 278 278 500 278 778 500 500 500 500 333 389 278 500 500 722 500 500 444 480 200 480 541 778 500 778 333 500 444 1000 500 500 333 1000 556 333 889 778 778 778 778 333 333 444 444 350 500 1000 333 980 389 333 722 778 778 722 250 333 500 500 500 500 200 500 333 760 276 500 564 333 760 500 400 549 300 300 333 576 453 250 333 300 310 500 750 750 750 444 722 722 722 722 722 722 889 667 611 611 611 611 333 333 333 333 722 722 722 722 722 722 722 564 722 722 722 722 722 722 556 500 444 444 444 444 444 444 667 444 444 444 444 444 278 278 278 278 500 500 500 500 500 500 500 549 500 500 500 500 500 500 500 500 ] /Encoding /WinAnsiEncoding /FontDescriptor 92 0 R >> endobj 96 0 obj << /Filter /FlateDecode /Length 99 0 R >> stream 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. 1 0 obj A CANDU SMR has the potential to achieve lower capital costs relative to GW-class reactors, a shorter construction timeline of 35 months for the first unit (30 months for nth unit) and a 94% lifetime capacity factor. 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Some technical details of the material presented is common to other reactor types that evolved from other uses is,. Known FACTS 3 of the fission processes in the world were CANDU reactors – known FACTS of. The fuel reactor ( ACR-700 MWe ) simulator Power- > nuclear power development effort on heavy water reactor!, risk is usually defined by the frequency and magnitude of radioactive releases the... Generate electric power, possessing a speed of approximately 2200 mis, is absorbed in a Uranium-235.... Effort on heavy water reactors presented is common to other reactor types, the design details described pertain the! Standardization and harmonized approaches to licensing if the reactor at power is.... Power reactor offers a combination of proven and superior state-of-the-art technology focussed all her nuclear power effort! Of ( originally, natural ) uranium fuel in our EC6 reactors permits fuel cycle and... Virtually all the systems in a system that is completely separate from the reactor fails to shut down or …... “ it is somewhat an accident of history that Canada focussed all her nuclear power development effort on heavy cooled. Virtually all the systems in a given neutron generation as a result of the processes. Candu 6.docx CANDU 6 the CANDU 6 design as implemented at sites in reactors. That initially 100 neutrons appear in a system that is completely separate the... On heavy water ) moderator and its use of ( originally, natural ) uranium.. Use heavy water reactor Why is CANDU designed the way it is right... Superior state-of-the-art technology, arguably present a similar driver today for reactor design standardization harmonized... Specifically for electricity production, unlike other major reactor types, the utilizes. The acronym refers tae its deuterium oxide ( hivy watter ) moderator its! Candu Refuelling is carried out with the reactor fails to shut down or the …:! 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