Nuclear reactor systems
A technical, historical and dynamic approach
Bertrand Barré
Pascal Anzieu
Richard Lenain
Jean-Baptiste Thomas
edpsciences
Chapter 1. Introduction
1.1. General introduction1
1.2. The ebullient beginnings2
1.2.1. Prehistory [1-10]4
1.2.2. Uranium enrichment, the deus ex machina4
1.3. Bases for comparison [12, 13]5
1.3.1. Fertile and fissile isotopes5
1.3.2. Moderators6
1.3.3. Coolants6
1.4. The driving forces of selection7
1.5. Today (and tomorrow)8
1.5.1. Gas-cooled reactors9
1.5.2. Graphite-moderated and boiling water-cooled reactors RBMK9
1.5.3. Heavy water reactors CANDU10
1.5.4. Light water reactor PWR, BWR and VVER10
1.5.5. High temperature reactors10
1.5.6. Fast breeders [14]11
1.5.7. Molten salt reactors [1]12
1.6. Biotope, domination and selection12
1.7. From spontaneous selection to a formalized process [14, 15]13
1.7.1. GIF, the Generation IV International Forum13
1.7.2. INPRO, International Project on Innovative Nuclear Reactors et Fuel Cycles14
1.8. Fusion15
1.9. Conclusion15
Chapter 2. CO2 gas cooled reactors
2.1. Introduction17
2.2. General architecture18
2.3. General features of graphite-moderated reactors20
2.3.1. Fiel : natural uranium and magnesium clad (UNGG et Magnox)20
2.3.2. Graphite moderator21
2.3.3. General physical properties of graphite moderated reactors23
2.4. UNGG25
2.4.1 The French UNGG program25
2.4.2 St Laurent A example28
2.5. Magnox31
2.6. Advanced gas cooled reactor AGR35
Chapter 3. RBMK (Reactor Bolchoi Mochtnosti Kanali)
3.1. General43
3.2. General description44
3.3. Core physics53
3.4. Chernobyl accident56
3.5. Changes made to improve RBMK core behavior58
Chapter 4. Heavy water moderated nuclear reactors
4.1. Introduction61
4.2. General63
4.2.1. Heavy-water63
4.2.2. Natural uranium64
4.2.3. Pressure tubes66
4.3. Description of a CANDU 668
4.3.1. Reactor68
4.3.2. Primary system72
4.3.3. Moderator system74
4.3.4. Fuel74
4.3.5. Reactivity control systems75
4.3.6. Safety systems76
4.3.7. Fuel cycle79
4.3.8. The vacuum building79
4.3.9. Difficulties and incidents in the Canadian programme81
4.3.10. Economy83
4.4. Fuel cycle possibilities83
4.4.1. CANFLEX fuel83
4.4.2. Slightly enriched uranium84
4.4.3. Recycling of the LWR fuel84
4.4.4. Perspectives84
Chapter 5. Nuclear marine propulsion
5.1. Introduction93
5.2. Main properties required for propulsion93
5.3. History and development95
5.4. Naval reactor development96
5.5. Civilian fleet98
Chapter 6. Experimental reactors
6.1. Different types of experimental or research reactors101
6.2. Materials irradiation reactors (MTR, TRIGA...)102
6.2.1. OSIRIS, in Saclay102
6.2.2. TRIGA104
6.3. MTR Fuel, RERTR Programme105
6.4. Neutron source reactors105
6.5. Spallation sources106
6.6. Materials irradiation facilities in Europe, the JHR project108
6.7. Myrrha, Pallas109
Chapter 7. Advanced « Generation III » reactors
7.1. Introduction : Genesis of « Generation III »113
7.2. Evolutionary or Revolutionary ?114
7.3. EPR, the Evolutionary Power Reactor [1-6]114
7.3.1. Genesis of the EPR114
7.3.2. EPR General Characteristics116
7.3.3. Primary and secondary circuits116
7.3.4. Systems architecture118
7.3.5. Mitigation of severe accidents118
7.3.6. Future economics of the EPR119
7.3.7. EPR status in 2014121
7.4. The Korean APR 1400121
7.4.1. S 80+ basic options122
7.4.2. General characteristics122
7.4.3. Primary circuit123
7.4.4. The APR 1400123
7.5. The AP 600 and AP 1000 by Toshiba-Westinghouse [12-14]124
7.5.1. General characteristics125
7.5.2. Core and primary circuit126
7.5.3. Emergency systems127
7.5.4. From the AP 600 to the AP 1000129
7.6. Other generation III PWRs130
7.6.1. The ATMEA130
7.6.2. The APWR131
7.6.3. The AES 92131
7.7. Japanese and American ABWRs [17-22]132
7.7.1. General characteristics133
7.7.2. Architecture simplification133
7.7.3. Simplification of the primary circuit135
7.7.4. Additional improvements136
7.8. General Electric Simplified BWRs [24-29]136
7.8.1. General characteristics138
7.8.2. The SBWR (600-670 MWe)138
7.8.3. The ESBWR (1300-1550 MWe)138
7.9. The KERENA [30, 31]140
7.10. SMRs [32, 33]142
7.10.1. SMRs' potential advantages and drawbacks144
7.10.2. Short description of four SMRs144
7.10.3. Prospects for SMRs ?149
Chapter 8. High Temperature Reactor
8.1. Obsolete or futuristic151
8.2. HTR fuel [1-3]151
8.3. HTR demos : Dragon, AVR, Peach bottom153
8.3.1. Dragon153
8.3.2. The AVR154
8.3.3. Peach bottom155
8.4. The « Astronuclear » Saga [6, 7]156
8.5. Fort St Vrain and THTR Prototypes, the Thorium Cycle158
8.5.1. Fort St Vrain158
8.5.2. The Schemehausen (or Uentrop) THTR160
8.5.3. The thorium cycle [8-10]160
8.6. False start in the USA161
8.6.1. General atomic's 1160 and 770 project161
8.6.2. The French HTR programme (first period)163
8.6.3. An assessment of HTR programmes, a seen from 1980163
8.7. Why a renewed interest for HTRs ?165
8.7.1. A changing environment165
8.7.2. The GT-MHR, Gas turbine modular high temperature reactor [11-14]166
8.7.3. ESKOM PBMR pebble bed modular reactor [15]167
8.7.4. The VHTR and ANTARES168
8.7.5. The Chinese HTR-PM169
Chapter 9. Molten Salt Reactors
9.1. Liquid fuel reactors [1-6]171
9.2. MSRE, Molten Salt Reactor Experiment171
9.3. The Breeder MSR Projects172
9.4. Generation IV MSRs172
9.5. AHTR174
Chapter 10. Liquid metal cooled fast neutron reactors
10.1. Introduction177
10.1.1. Breeding177
10.1.2. Waste incineration179
10.1.3. Situation of the industry180
10.2. Description of Superphenix180
10.2.1. Principles180
10.2.2. General design182
10.2.3. Core and fuel184
10.2.4. Handling the assemblies186
10.2.5. Reactor block188
10.2.6. Sodium circuits188
10.2.7 Steam generators189
10.2.8. Decay Heat Removal systems189
10.2.9. Main Superphenix characteristics191
10.3. Fast reactor fuel192
10.3.1. Special characteristics192
10.3.2. Operating criteria192
10.3.3. Stresses in service192
10.3.4. Fuel material193
10.3.5. Clad materials and effects of irradiation194
10.3.6. Characteristics of fuel elements and behaviour problems195
10.3.7. Fuel behavior195
10.3.8. Reprocessing197
10.4. Fast reactor safety197
10.4.1. Containment197
10.4.2. Reactivity control200
10.4.3. Decay Heat removal201
10.4.4. Considering accidents involving fuel melting201
10.5. Sodium technology203
10.5.1. Sodium203
10.5.2. The choice of sodium203
10.5.3. Sodium chemistry and purification204
10.5.4. Compatibility of sodium with materials205
10.5.5. Circuits and instrumentation205
10.5.6. Interventions, inspection, repair206
10.5.7. Safety207
10.5.8. Overall assessment of the use of sodium208
10.6. Alternatives to sodium208
10.6.1. Liquid metals208
10.6.2. Corrosion by heavy liquid metals209
10.6.3. Lead-bismuth reactor feedback experience210
10.6.4. Lead-cooled reactors210
10.6.5. Conclusion214
10.7. Development prospects214
10.7.1. Current context214
10.7.2. Economy of sodium-cooled FRs215
10.7.3. FR plutonium burner and radioactive waste transmuter215
10.8. Conclusion216
Chapter 11. The gas-cooled fast reactor
11.1. Introduction219
11.2. History219
11.3. The GRF, a Generation-IV system220
11.4. GFR design options224
11.4.1. Fuel element224
11.4.2. Core design and performance225
11.4.3. Primary system225
11.4.4. Power conversion system228
11.4.5. Towards a demonstration reactor228
Chapter 12. BWR : specific features, trends
12.1. History, principles and architecture231
12.2. Neutronics, absorbers, fuel235
12.2.1. BWR vs. PWR : moderation ratio235
12.2.2. Core structures and fuel assemblies, Reactor Pressure Vessel (RPV)236
12.2.3. Distribution of enrichment and of poisons238
12.3. Thermal-hydraulics and its tight coupling with neutronics240
12.3.1. Recirculation ratio240
12.3.2. Coupling between neutronics and thermal-hydraulics240
12.3.3. Thermal-hydraulic instability241
12.3.4. Stability loops ; conceptual scheme of a sequence of feedback effects244
12.4. Operation244
12.4.1. Principles244
12.4.2. Operating envelope245
12.4.3. Operation, fuel and plutonium245
12.5. Chemistry of water and materials247
12.5.1. Radiolysis247
12.5.2. Cladding247
12.5.3. Intergranular stress corrosion248
12.5.4. Activation and gamma-emitting deposits, radiation protection in the turbine hall248
12.6. Safety248
12.6.1. Containment barriers248
12.6.2. Containment pressure reduction249
12.6.3. Safety injection, core meltdown and long-term containment250
12.7. Trends256
12.7.1. Safety, in the aftermath of Fukushima256
12.7.2. Fuel cycle improvements259
Chapter 13. The place and the potential of Light Water Reactors in the transition from Gen-III to Gen-IV
13.1. Introduction261
13.2. The stable and plentiful ground of physics and a changing world262
13.2. The Gen-IV vs Gen-III specification gap : the specifications for suistainable nuclear power264
13.3.1. Introduction264
13.3.2. The basic specifications : formulation and discussion264
13.4. The physical basis of sustainable nuclear power : high nuclear efficiency and the conditions required to achieve it269
13.5. Fast spectrum : the main constraints and specific issues272
13.5.1. The design constraints related to the fast neutron spectrum272
13.5.2. From the past to the future274
13.6. « smart » plutonium multi-recycling in LWR : The natural uranium saving context issue276
13.7. Energy scenarios and nuclear power worldwide : a prospective framework for the century278
13.8. Affordable natural uranium resources280
13.8.1. Rising natural uranium prices as ore of decreasing uranium concentrations has to be used280
13.8.2. The strategic risk of preclusion of access to natural uranium is latent and may take form for a number of reasons283
13.8.3. Shortages and price fluctuations in the short and long term uranium market283
13.9. Light Water Reactors, the current situation : Strenghts, Weaknesses, Opportunities, Threats284
13.9.1. Current situation284
13.9.2. LWR strenghts : robust options, wealth of experience289
13.9.3. Weaknesses290
13.9.1. Opportunities290
13.9.2. Threats291
13.10. LWR : further improvements in fuel cycle efficiency by spectral hardening292
13.10.1. LWR : an overview of the present fuel cycle performances, of the trends and of some possible improvements292
13.10.2. The last decades : fluctuations in the objectives, shooting on a mobile target296
13.10.3. The state of the art regarding the limits and the trends for the burn-up and for the recycling of plutonium298
13.10.4. What could be the next step ?299
13.11. A stepwise transition, a synergistic cohabitation : defining a flexible scheme for a sustainable nuclear fleet growth rate, worldwide, and transferring fissile material to the future through continuous valorization303
13.11.1. Introduction303
13.11.2. How to manage, from the uranium extraction rate viewpoint and from the nuclear plant type viewpoint, a strong nuclear energy growth after 2025/2030 ?304
13.11.3. Competing options around 2040-2050 for the utilities and for the countries launching a large fleet of nuclear reactors307
13.11.4. Best available technologies for « thrifty » Gen-3+NSSS310
13.11.5. Thorium and related strategies (basically, it is a 233U issue)312
13.11.6. An « exotic » enabler from « Nuclear Energy Synergetics » : fusion-fission hybrid as fissile plutonium (and 233U) factories313
13.11.7. FBR fleet breeding doubling time : estimates and sensitivity analysis314
13.11.8. Conclusion315
Chapter 14. Nuclear fusion
14.1. Introduction323
14.2. Principles and basic data324
14.2.1. General324
14.2.2. More on physical principles and basic data325
14.2.3. Plasma328
14.2.4. The ignition criterion329
14.3. Fusion by magnetic confinement331
14.3.1. Principles331
14.3.2. Confinement and the Tokamak principle333
14.3.3. Heating of magnetized plasma336
14.3.4. Findings : principles and noteworthy facts338
14.4. Fusion by inertial confinement343
14.4.1. Introduction : orders of magnitude343
14.4.2. Target ignition by hot point344
14.4.3. Instabilities345
14.4.4. Findings346
14.5. Reactor and associated technology348
14.5.1. Reactor principle348
14.5.2. Tritium production348
14.5.3. Materials352
14.6. The reactor : magnetic fusion353
14.6.1. Energy efficiency353
14.6.2. Superconducting electromagnets355
14.6.3. Divertor355
14.7. The reactor : inertial fusion356
14.7.1. The positive energy balance criterion356
14.7.2. Energy source356
14.7.3. Reaction chamber357
14.7.4. Targets357
14.7.5. In summary358
14.8. Nuclear safety358
14.8.1. Normal operation : containment of toxic substances358
14.8.2. Accident situations : a few remarks358
14.9. Waste358
14.10. Costs359
14.10.1. Composition of costs and orders of magnitude359
14.10.2. Ecological impact and external costs360
14.11. Historical trends, current challenges ; RetD ways and needs361
14.11.1. Historical trends and current challenges361
14.11.2. RetD trends and needs363
14.12. Conclusion365
Chapter 15. Futuristic systems : ADS, Space Nuclear propulsion and power generation, ADNIS
15.1. Accelerator Driven Systems (ADS)367
15.1.1. Introduction367
15.1.2. The physics of ADS. Basic principles and first design consequences368
15.1.3. Technology and design : main specific components, challenges, and key points for feasibility374
15.1.4. Preliminary techno-economic assessment381
15.1.5. Defining a role for the ADS in the nuclear fleet : elements for a rationale382
15.1.6. The R and D programs382
15.1.7. The future in the world, in Europe, in France383
15.2. Nuclear space power and propulsion383
15.3. Advanced neutron irradiation sources (NIS)389
Chapter 16. A few questions fostering further thought on some key issues
16.1. The designer's carrousel393
16.2. Entering a new era or circling around a carrousel ?393
16.3. Main questions to be addressed (combining innovation, design, marketing and acceptance issues)394
16.4. Some answers coming from past and recent history395
16.5. Design as a conceptual approach : design wheel and « helix »397
16.6. Beyond the incremental improvement of LWRs (safety, flexibility,fuel cycle (plutonium), lifetime, availability, uprating), what are the main achievements of recent (in the last three decades) design and operational qualification for power reactors ?397
16.7. Other examples399
16.8. The coolant issue : updating some questions400
16.9. As for the coolant choice, there is no single merit index401
16.10. Main topics involved in the coolant issue402
16.11. Multi-criteria assessment : the representation and computation issue ; a tentative representation diagram404
16.12. Making a positive contribution to the qualification of Gen-IV « enablers »405
16.13. Knowledge bases and tools405
16.14. « War » is (or should be) over406
16.15. Optimisation of a multi-strata nuclear fleet achieving « smart recycling » is the new frontier407
16.16. Qualification (including substantial operation feedback) of all efficient enablers, with an updated design fulfilling the post-Fukushima requirements, must be started ASAP407