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SAFETY RE-ASSESSMENT of AECL TEST and RESEARCH REACTORS D. J. WINFIELD Chalk River Nuclear Laboratories ATOMIC ENERGY of CANADA
309 IAEA-SM-310/ 94 SAFETY RE-ASSESSMENT OF AECL TEST AND RESEARCH REACTORS D. J. WINFIELD Chalk River Nuclear Laboratories ATOMIC ENERGY OF CANADA LIMITED 310 IAEA-SM-310/94 SAFETY RE-ASSESSMENT OF AECL TEST AND RESEARCH REACTORS ABSTRACT Atomic Energy of Canada Limited currently has four operating engineering test/research reactors of various sizes and ages; a new isotope-production reactor MAPLE-X10, under construction at Chalk River Nuclear Laboratories (CRNL), and a heating demonstration/test reactor, SDR, undergoing high-power commissioning at Whiteshell Nuclear Research Establishment (WNRE). The company is also performing design studies of small reactors for hot water and electricity production. The older reactors are ZED-2, PTR, NRX and NRU; these range in age from 42 years (NRX) to 29 years (ZED-2). Since 1984, limited-scope safety re-assessments have been underway on three of these reactors (ZED-2, NRX and NRU). ZED-2 and PTR are operated by the Reactor Physics Branch, all other reactors are operated by the respective site Reactor Operations Branches. For the older reactors the original safety reports produced were entirely deterministic in nature and based on the design-basis accident concept. The limited scope safety re-assessments for these older reactors, carried out over the past 5 years, have comprised both quantitative probabilistic safety-assessment techniques, such as event tree and fault tree analysis, and/or qualitative techniques, such as failure mode and effect analysis. The technique used for an individual assessment was dependent upon the specific scope required. This paper discusses the types of analyses carried out, specific insights/recommendations resulting from the analysis and indicates the plan for future analysis. -
Heu Repatriation Project
HEU REPATRIATION PROJECT RATIONALE In April 2010, the governments of Canada and the United States (U.S.) committed to work cooperatively to repatriate spent highly- enriched uranium (HEU) fuel currently stored at the Chalk River Laboratories in Ontario to the U.S. as part of the Global Threat Reduction Initiative, a broad international effort to consolidate HEU inventories in fewer locations around the world. This initiative PROJECT BACKGROUND promotes non-proliferation This HEU is the result of two decades of nuclear fuel use at the by removing existing weapons Chalk River Laboratories for Canadian Nuclear Laboratories (CNL) grade material from Canada research reactors, the National Research Experimental (NRX) and and transferring it to the National Research Universal (NRU), and for the production of U.S., which has the capability medical isotopes in the NRU, which has benefitted generations of to reprocess it for peaceful Canadians. Returning this material to the U.S. in its existing solid purposes. In March 2012, and liquid forms ensures that this material is stored safely in a Prime Minister Harper secure highly guarded location, or is reprocessed into other forms announced that Canada and that can be used for peaceful purposes. the U.S. were expanding their efforts to return additional Alternative approaches have been carefully considered and inventories of HEU materials, repatriation provides the safest, most secure, and fastest solution including those in liquid form. for the permanent disposition of these materials, thereby eliminating a liability for future generations of Canadians. For more information on this project contact: Email: [email protected] Canadian Nuclear Laboratories 1-866-886-2325 or visit: www.cnl.ca persons who have a legitimate need to PROJECT GOAL know, such as police or emergency response To repatriate highly-enriched uranium forces. -
The Nuclear Sector at a Crossroads: Fostering Innovation and Energy Security for Canada and the World
THE NUCLEAR SECTOR AT A CROSSROADS: FOSTERING INNOVATION AND ENERGY SECURITY FOR CANADA AND THE WORLD Report of the Standing Committee on Natural Resources James Maloney Chair JUNE 2017 42nd PARLIAMENT, 1st SESSION Published under the authority of the Speaker of the House of Commons SPEAKER’S PERMISSION Reproduction of the proceedings of the House of Commons and its Committees, in whole or in part and in any medium, is hereby permitted provided that the reproduction is accurate and is not presented as official. This permission does not extend to reproduction, distribution or use for commercial purpose of financial gain. Reproduction or use outside this permission or without authorization may be treated as copyright infringement in accordance with the Copyright Act. Authorization may be obtained on written application to the Office of the Speaker of the House of Commons. Reproduction in accordance with this permission does not constitute publication under the authority of the House of Commons. The absolute privilege that applies to the proceedings of the House of Commons does not extend to these permitted reproductions. Where a reproduction includes briefs to a Standing Committee of the House of Commons, authorization for reproduction may be required from the authors in accordance with the Copyright Act. Nothing in this permission abrogates or derogates from the privileges, powers, immunities and rights of the House of Commons and its Committees. For greater certainty, this permission does not affect the prohibition against impeaching or questioning the proceedings of the House of Commons in courts or otherwise. The House of Commons retains the right and privilege to find users in contempt of Parliament if a reproduction or use is not in accordance with this permission. -
Tering Distributions Using MCNP Simulations of Critical Measurements and Simplified Calculation Benchmarks K.S
International Conference on Nuclear Data for Science and Technology 2007 DOI: Assessment of evaluated (n,d) energy-angle elastic scat- tering distributions using MCNP simulations of critical measurements and simplified calculation benchmarks K.S. Kozier Atomic Energy of Canada Limited, Chalk River Laboratories, Chalk River, Ontario, Canada, K0J 1J0 Abstract. Different evaluated (n,d) energy-angle elastic scattering distributions produce k-effective differences in MCNP5 simulations of critical experiments involving heavy water (D2O) of sufficient magnitude to suggest a need for new (n,d) scattering measurements and/or distributions derived from modern theoretical nuclear models, especially at neutron energies below a few MeV. The present work focuses on the small reactivity change of <1 mk that is observed in the MCNP5 D2O coolant-void-reactivity calculation bias for simulations of two pairs of critical experiments performed in the ZED-2 reactor at the Chalk River Laboratories when different nuclear data libraries are used for deuterium. The deuterium data libraries tested include ENDF/B-VII.0, ENDF/B-VI.4, JENDL-3.3 and a new evaluation, labelled Bonn-B, which is based on recent theoretical nuclear-model calculations. Comparison calculations were also performed for a simplified, two-region, spherical model having an inner, 250-cm radius, homogeneous sphere of UO2, without and with deuterium, and an outer 20-cm-thick deuterium reflector. 1 Introduction The present work focuses on the sensitivity of the ZED-2 MCNP5 CVR calculation bias to -
Nuclear in Canada NUCLEAR ENERGY a KEY PART of CANADA’S CLEAN and LOW-CARBON ENERGY MIX Uranium Mining & Milling
Nuclear in Canada NUCLEAR ENERGY A KEY PART OF CANADA’S CLEAN AND LOW-CARBON ENERGY MIX Uranium Mining & Milling . Nuclear electricity in Canada displaces over 50 million tonnes of GHG emissions annually. Electricity from Canadian uranium offsets more than 300 million tonnes of GHG emissions worldwide. Uranium Processing – Re ning, Conversion, and Fuel Fabrication Yellowcake is re ned at Blind River, Ontario, PELLETS to produce uranium trioxide. At Port Hope, Ontario, Nuclear Power Generation and Nuclear Science & uranium trioxide is At plants in southern Technology TUBES converted. URANIUM DIOXIDE Ontario, fuel pellets are UO2 is used to fuel CANDU loaded into tubes and U O UO URANIUM Waste Management & Long-term Management 3 8 3 nuclear reactors. assembled into fuel YUKON TRIOXIDE UO2 Port Radium YELLOWCAKE REFINING URANIUM bundles for FUEL BUNDLE Shutdown or Decommissioned Sites TRIOXIDE UF is exported for 6 CANDU reactors. UO enrichment and use Rayrock NUNAVUT 3 CONVERSION UF Inactive or Decommissioned Uranium Mines and 6 in foreign light water NORTHWEST TERRITORIES Tailings Sites URANIUM HEXAFLUORIDE reactors. 25 cents 400 kg of COAL Beaverlodge, 2.6 barrels of OIL Gunnar, Lorado NEWFOUNDLAND AND LABRADOR McClean Lake = 3 Cluff Lake FUEL PELLET Rabbit Lake of the world’s 350 m of GAS BRITISH COLUMBIA Cigar Lake 20% McArthur River production of uranium is NVERSION Key Lake QUEBEC CO mined and milled in northern FU EL ALBERTA SASKATCHEWAN MANITOBA F Saskatchewan. AB G R University of IN IC ONTARIO P.E.I. IN A Saskatchewan The uranium mining F T E IO 19 CANDU reactors at Saskatchewan industry is the largest R N TRIUMF NEW BRUNSWICK Research Council NOVA SCOTIA private employer of Gentilly-1 & -2 Whiteshell Point Lepreau 4 nuclear power generating stations Rophton NPD Laboratories Indigenous people in CANDU REACTOR Chalk River Laboratories Saskatchewan. -
The AECL Chalk River Laboratories (CRL) Was Established in 1944 In
WM’05 Conference, February 27 – March 3, 2005, Tucson, AZ STORED LIQUID WASTE REMEDIATION PROGRAM, PHASE 1, AT CHALK RIVER LABORATORIES R.P. Denault, P. Heeney, E. Plaice, K. Schruder, Waste Remediation & Enhancement Projects Division D. Wilder, Site Engineering & Project Management Division W. Graham, Components & Systems Division AECL, Chalk River Laboratories, MS #E4 Chalk River, ON, Canada K0J 1J0 [email protected] ABSTRACT Liquid intermediate- and high-level radioactive wastes presently stored in 21 tanks at the Chalk River Laboratories are being retrieved, conditioned and consolidated into a new storage system. The Liquid Waste Transfer and Storage project is responsible for designing, constructing and commissioning the storage system, specifying and procuring retrieval and transfer equipment and developing operating, maintenance and training procedures and materials. The project has characterized the existing wastes and completed an inspection of the present storage tanks and vaults. The conceptual design has progressed to include a criticality safety assessment, a safeguards analysis, selection of retrieval and transfer technologies and conceptual design of the new storage system. The transfer and collection of wastes from these 21 tanks will be a step forward in the goal of achieving a long-term management solution for the wastes. This paper provides an overview of the development of the conceptual design, including the new storage system, the retrieval system and the transfer systems, the laboratory program that supports the blending sequence and waste conditioning and the tank and vault inspection. INTRODUCTION Atomic Energy of Canada Limited (AECL) is a Federal Crown Corporation charged with leading the development of peaceful applications of nuclear technology in Canada. -
NPR81: South Korea's Shifting and Controversial Interest in Spent Fuel
JUNGMIN KANG & H.A. FEIVESON Viewpoint South Korea’s Shifting and Controversial Interest in Spent Fuel Reprocessing JUNGMIN KANG & H.A. FEIVESON1 Dr. Jungmin Kang was a Visiting Research Fellow at the Center for Energy and Environmental Studies (CEES), Princeton University in 1999-2000. He is the author of forthcoming articles in Science & Global Security and Journal of Nuclear Science and Technology. Dr. H.A. Feiveson is a Senior Research Scientist at CEES and a Co- director of Princeton’s research Program on Nuclear Policy Alternatives. He is the Editor of Science and Global Security, editor and co-author of The Nuclear Turning Point: A Blueprint for Deep Cuts and De-alerting of Nuclear Weapons (Brookings Institution, 1999), and co-author of Ending the Threat of Nuclear Attack (Stanford University Center for International Security and Arms Control, 1997). rom the beginning of its nuclear power program could reduce dependence on imported uranium. During in the 1970s, the Republic of Korea (South Ko- the 1990s, the South Korean government remained con- Frea) has been intermittently interested in the cerned about energy security but also began to see re- reprocessing of nuclear-power spent fuel. Such repro- processing as a way to address South Korea’s spent fuel cessing would typically separate the spent fuel into three disposal problem. Throughout this entire period, the constituent components: the unfissioned uranium re- United States consistently and effectively opposed all maining in the spent fuel, the plutonium produced dur- reprocessing initiatives on nonproliferation grounds. We ing reactor operation, and the highly radioactive fission review South Korea’s evolving interest in spent fuel re- products and transuranics other than plutonium. -
The Nuclear Generation Option
Maritime Link Appendix 6.01 Page 1 of 24 THE NUCLEAR GENERATION OPTION Prepared for Emera Inc. November 28, 2012 Maritime Link Appendix 6.01 Page 2 of 24 The Nuclear Generation Option 1.0 Introduction The objective of this report is to provide a general overview of the nuclear generation option by providing an overview of the technology, a summary of the experience in Canada with nuclear generation, and generalized or indicative estimates of the costs of constructing and operating nuclear power plants. The information contained in the report is drawn from publicly available sources and while Barra Strategies Incorporated has attempted to verify the quality of the information contained in the report, it may contain inaccuracies. In 2009, nuclear generation produced 15% of the electricity produced in Canada in 2009 and accounted for over 16.5% of the global production. Electricity Production by Fuel Source in TWh (2009) Fuel Source Canada World Coal and Peat 91.6 8,119 Oil 8.3 1,027 Gas 37.5 4,301 Biofuels 6.5 217 Waste 0.2 2,697 Hydro 364.0 3,329 Nuclear 90.4 2,697 Geothermal 0 67 Solar PV 0.1 20 Solar Thermal 0.0 1 Wind 4.5 273 Tide <0.1 <1 Other 10 TOTAL 603.2 20,132 Source: International Energy Agency 2.0 Nuclear Generation Technologies 2.1 Current Reactors There are a wide range of nuclear reactor technologies currently in service around the world. In all the designs, the heat produced by the continuous fission of atoms in the fuel is used to produce steam. -
National Neutron Strategy-Draft
DRAFT FOR CONSULTATION A National Strategy for Materials Research with Neutron Beams: Discussion on a “National Neutron Strategy” This consultation draft was updated in February 2021, following the outcomes of the Canadian Neutron Initiative Roundtable: Towards a National Neutron Strategy, organized in partnership with CIFAR on December 15–16, 2020. 1 DRAFT FOR CONSULTATION This Canadian Neutron Initiative (CNI) discussion paper and associated Roundtable Meeting are produced in partnership with CIFAR. We also thank the following sponsors: 2 DRAFT FOR CONSULTATION Contents 1 Executive summary and overview of the national neutron strategy ................................................... 5 2 Consultation on the strategy ................................................................................................................ 9 3 The present: A strong foundation for continued excellence .............................................................. 10 3.1 The Canadian neutron beam user community ........................................................................... 10 3.2 McMaster University ................................................................................................................... 14 3.3 Other neutron beam capabilities and interests .......................................................................... 15 4 Forging foreign partnerships ............................................................................................................... 17 4.1 Global renewal of advanced neutron sources ........................................................................... -
Chalk River Laboratories
Canada’s Nuclear Sacrifice Area Considerations related to the relicensing of the Chalk River Laboratories a brief submitted to the Canadian Nuclear Safety Commission by the Concerned Citizens of Renfrew County prepared by Gordon Edwards Ph.D. September 6, 2011 Considerations related to the relicensing of the Chalk River Laboratories Table of Contents List of Recommendations 3 Introduction 5 The Licence Application 6 Plan of the Present Submission 9 Importance of the NRU Reactor 10 The Reason for the 2007 Shutdown 11 The NRX Accident 12 The Nuclear Safety Culture 14 The Authority and Independence of the CNSC 15 The MAPLE Reactors 17 The NRU Reactor Vessel Leak of 2009 18 A Caveat on the Continued Operation of NRU 20 Mitigating Radioactive Releases at CRL 22 Case 1: The Rod Bay Leak (onsite) Case 2: Tritium Effluents into the Ottawa River (offsite) Reporting Radioactive Emissions from CRL 26 The Hazards of Isotope Production 28 Deterioration of the FISST 30 Eliminating Weapons Grade Uranium 32 Repatriation of Irradiated HEU to the USA 33 Map and Inventory of Radioactive Wastes at CRL 35 The Nuclear Legacy Liabilities Program 36 Appendix: Towards a Healthy Regulatory Culture 39 2 Considerations related to the relicensing of the Chalk River Laboratories List of Recommendations: 1. That the CRL licence application be split into several: one for the NRU reactor (and perhaps the Z-2 reactor as well), one for the isotope production operation (including FISST and HEU), one for the radioactive waste storage tanks and dumps (including the remediation work affecting degraded irradiated fuel elements, underground plumes and radioactive sediments in the Ottawa River), and one for the multitude of buildings, radioisotope laboratories, defunct facilities and other activities at CRL. -
Inventory of Radioactive Waste in Canada 2016 Inventory of Radioactive Waste in Canada 2016 Ix X 1.0 INVENTORY of RADIOACTIVE WASTE in CANADA OVERVIEW
Inventory of RADIOACTIVE WASTE in CANADA 2016 Inventory of RADIOACTIVE WASTE in CANADA 2016 Photograph contributors: Cameco Corp.: page ix OPG: page 34 Orano Canada: page x Cameco Corp.: page 47 BWX Technologies, Inc.: page 2 Cameco Corp.: page 48 OPG: page 14 OPG: page 50 OPG: page 23 Cameco Corp.: page 53 OPG: page 24 Cameco Corp.: page 54 BWX Technologies, Inc.: page 33 Cameco Corp.: page 62 For information regarding reproduction rights, contact Natural Resources Canada at [email protected]. Aussi disponible en français sous le titre : Inventaire des déchets radioactifs au Canada 2016. © Her Majesty the Queen in Right of Canada, as represented by the Minister of Natural Resources, 2018 Cat. No. M134-48/2016E-PDF (Online) ISBN 978-0-660-26339-7 CONTENTS 1.0 INVENTORY OF RADIOACTIVE WASTE IN CANADA OVERVIEW ���������������������������������������������������������������������������������������������� 1 1�1 Radioactive waste definitions and categories �������������������������������������������������������������������������������������������������������������������������������������������������� 3 1�1�1 Processes that generate radioactive waste in canada ����������������������������� 3 1�1�2 Disused radioactive sealed sources ����������������������������������������� 6 1�2 Responsibility for radioactive waste �������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 6 1�2�1 Regulation of radioactive -
Tritium Releases and Dose Consequences in Canada in 2006 Part of the Tritium Studies Project
Canada’s Nuclear Regulator Tritium Releases and Dose Consequences in Canada in 2006 Part of the Tritium Studies Project INFO-0793 December 2009 TRITIUM RELEASES AND DOSE CONSEQUENCES IN CANADA IN 2006 Tritium Releases and Dose Consequences in Canada in 2006 © Minister of Public Works and Government Services Canada 2009 Catalogue number CC172-52/2009E-PDF ISBN 978-1-100-13930-2 Published by the Canadian Nuclear Safety Commission (CNSC) Catalogue number: INFO-0793 Extracts from this document may be reproduced for individual use without permission provided the source is fully acknowledged. However, reproduction in whole or in part for purposes of resale or redistribution requires prior written permission from the Canadian Nuclear Safety Commission. Également publié en français sous le titre de : Rejets de tritium et conséquences sur les doses au Canada en 2006 Document availability This document can be viewed on the CNSC Web site at nuclearsafety.gc.ca. To order a printed copy of the document in English or French, please contact: Canadian Nuclear Safety Commission 280 Slater Street P.O. Box 1046, Station B Ottawa, Ontario K1P 5S9 CANADA Tel.: 613-995-5894 or 1-800-668-5284 (in Canada only) Facsimile: 613-995-5086 E-mail: [email protected] Web site: nuclearsafety.gc.ca Cover images (from left to right) 1. Tritium occurs as a byproduct of the operation of nuclear and research reactors. Pictured is a stack at Bruce A nuclear generating station. 2. Tritium is used in the production of self-luminescent lights, like Exit signs. 3. Environmental monitoring is a requirement of a CNSC licence.