Nuclear power plants advanced nuclear reactors and. Westinghouse overview and ap plant projects update. Reactor coolant system piping is con gured with two identical main coolant loops, each of which employs a singleinc h inside diameter hot leg pipe to transport reactor coolanttoasteamgenerator. This stainless steel filler weld joins the seal ring. The ap is a twolooppressurized water reactor pwr with passive safety features and extensive plant. The ap pressurized water reactor s extensive use of modularization of plant construction mitigates both of these drivers. Replacement compressible thermal sleeve for reactor vessel heads. This figure includes pictorial representations of updates to the reactor internals design that will be discussed in a separate technical report. The original plan by nugeneration, a british subsidiary of toshibaowned westinghouse electric company, had the station coming online from 2024 with 3. Bulletshaped tips are used as plugs at the bottom of the rods to reduce hydraulic drag during reactor trip and to help guide the rods smoothly. These rcps were being fabricated for the vogtle electric generating plant vegp, units 3 and 4 and virgil c. Gda issue giaprc02 revision 0 primary sampling systems. Nuclear regulatory commission, and there are eight units currently being built, four in china and four in the us. There are some areas where work would be required by the operators if they decide to pursue construction of an ap reactor.
The ap reactor is an advanced reactor design with enhanced passive safety and improved operational performance. Based on the simulation platform, the typical 10% step load decrease transient is simulated and the pso algorithm is successfully implemented for control parameter optimization of ap reactor. Westinghouse published its submission on its website. Ap reactor design, fully ceramic microencapsulated fuel, excess reactivity worth, reactivity control worth, power distribution 1. Pdf analysis on neutronic parameters of the ap reactor core. The ihp installed at the ap plants across the globe incorporate the. The ap600 has passive safety features characteristic of the generation iii reactor concept. Introduction seeking inherently safe light water reactor lwr designs by certain direct modifications of existing lwrs has been a pressing research area worldwide over the past 15 years 17. The rcca absorber material is a very high thermal neutron absorber silverindiumcadmium alloy, with additional resonance absorption to enhance rod worth.
The design has been scaled up and improved with the ap. The ap reactor coolant pressure boundary is consistent with that of 10 cfr 50. Preliminary study of plutonium utilization in ap reactor. The provision of a tabular summary of the key aspects of a nuclear facilitys safety case, commonly referred to as a fault schedule, is considered relevant good practice in the uk. Assessment report for westinghouse ap part 1 issue 2. First shipment of two reactor coolant pumps expected in second. So ap reactor can incinerate almost 2 times the annual ma yield from a.
It achieved an interim design acceptance confirmation idac which had 51 gda issues attached to it. Ap reactor design is dangerous and not fit for purpose. Federal register ap standard technical specifications. Reactor ap design control document tier 2 material 4. Ap plants pressurized water reactor by westinghouse. Instrumentation and controls design control document epsgwgl700 7. Bwr underwater decontamination robot reactor vessel pool cleaning services udec download pdf. The westinghouse advanced passive pwr ap is an 1100.
Specifically, this report addresses gda issue gi ap fs08 fault schedule for ap. For nearly two decades, westinghouse has pursued an improved pressurized water reactor pwr design. Heart of reactor system each plant site includes two reactors 4 rcps per reactor 8 rcps per plant site rcps pump primary coolant through the reactor core the rcp provides a life of the plant solution canned motor rcps improve reliability ap reactor core ap reactor coolant pump the rcp is in the heart of the. Moorside nuclear power station is proposed for a site near sellafield, in cumbria, united kingdom. The following links on this page are to adobe portable document format pdf files. But unlike other pwr designs it is what is called an. The primary circuit pumps, pressurizer and steam generators with necessary secondary side are modeled using relap5. Thermalhydraulic and stress analysis of ap reactor.
The ap design uses sealless motor pump s for circulating primary reactor coolant through the reactor core, piping, and steam generators. Chapter 4, reactor, ap final safety evaluation report. The contract for the plant was agreed in july 2007. Three new reactors are planned for the moorside site next to europes biggest nuclear complex at sellafield, writes peter roche, with a combined capacity of 3.
The term reactor coolant system, as used in this section, is defined in section 5. Jan 01, 2011 westinghouse electric company once again sets a new industry standard with the ap reactor. Figure 6 of technical report 23 provides an updated dcd figure 3. I consider that from a containment thermal hydraulics and severe accident point of view, the ap reactor is suitable for construction in the uk, subject to assessment of additional information that becomes available as the gda design reference is supplemented with additional details on a sitebysite basis. The westinghouse ap advanced passive pressurized water reactor pwr is an 1117 mwe. Its core design is very similar to 3loop pwr with 157 fuel assemblies. The result of this commitment is the ap, a simpler and more economical pwr. Reactor coolant system and connected systems ap design control document tier 2 material 5. To obtain a free viewer for displaying this format, see our plugins, viewers, and other tools. Work up to 2018 would include acquiring the site licence, the development consent order. The total bypass flowrate which includes core barrel nozzle flow, head cooling flow, thimble flow, core shroud cooling flow and unallocated bypass flow is around 5% of the. Surfaces, which can become wetted during operation and refuelling, are clad with stainless steel welded overlay. The primary circuit of the ap reactor retains most of the general.
Reactor design although different from each other, the core, reactor vessel, and internals of both the ap600 and ap are. Westinghouse advanced passive pressurised water reactor ap design. Small modular reactors smrs offer simple, standardized, and safe. Thirdgeneration reactors have m any distinguished features such as. The ap reactor coolant pump utilizes a hermetically sealed canned motor of proven design. These relate to providing further information and resolving technical issues for a sitespecific design.
The first deployment of the ap plant formally began in july 2007 when westinghouse electric. A field weld is made, after the reactor vessel has been set, to install the permanent reactor vessel cavity seal ring. The reason is that the modified mshim controls the mbanks to move faster, which can be seen in figure 9c. It subsequently became the first ap reactor in the world to achieve first criticality at 2. Ml11171a303 westinghouse ap design control document rev. Proceedings of icapp 03 cordoba, spain, may 47, 2003 paper 3235 westinghouse ap advanced passive plant w. Analysis of passive residual heat removal system in ap nuclear. Construction of westinghouse ap nuclear power plants. The report specifically addresses gda issue gi ap rc02 revision 0, and two associated gda issue actions related to the primary sampling systems. Gi ap fs03 diversity for frequent faults gi ap fs04 provision of enhanced and diverse flux protection to protect against adverse power distribution faults. Hot testing of sanmen 1 was completed in june 2017, and fuel loading started on april 25, 2018. China industrial map editorial committee, industrial.
We are content that westinghouse has made sufficient progress against each of the gda is sues to complete this phase of regulatory assessment. The exact configuration of the ap reactor design can be found in ref. Oct 01, 2016 ap is a 2loop pressurized water reactor pwr with all the emergency core cooling systems based on natural circulation. Rovascan laser scanner delivery and positioning system. An important aspect of the gda process is the consideration of the disposability of the higher activity solid radioactive wastes and spent fuel that would be generated through reactor operation and decommissioning.
We identify these matters as assessment findings in our reports. Reactor coolant system and connected systems ap design. Ap is a trademark or registered trademark of westinghouse electric. Therefore, i have awarded a design acceptance confirmation dac, which marks the closure of gda and means that the reactor design is suitable for construction on. Twoinchinsidediameter cold leg pipes in each loop one per pump transport reactor coolant back to the reactor vessel to complete the circuit. The overshoot of the modified strategy is smaller than that of the original one. Generic design assessment ap nuclear power plant design. Specifically, this report addresses two closely related gda issues.
Announcement of the project start came roughly twelve months after westinghouse won a bidding contest over other companies. In this paper, a stress analysis of an ap reactor containment is performed in an loca, with the passive containment cooling system. Ap is a pwr reactors type with passive safety and large electric power output, which is mw electric. World nuclear performance report 2019 world nuclear association. Institute of electrical and electronics engineers ieee standards and us nrc. The onequarter scale reduced pressure integral system certified the passively safe systems that cool the reactor core using. Study of the reactor control system of mshim in ap. Borated water flows between fuel assembly region and core barrel. The ap600 is a model of relatively small, 600 mwe nuclear power plant designed by westinghouse electric company.
May 01, 2018 ap reactor is the improved versions of those currently operating pwrs, to study the effects to k eff after loading minor actinide transmutation material to ap reactors are also the important way finding an appropriate minor actinide transmutation material loading pattern. This report does not contain information on the gda process1, its background and development2 or the regulatory process and legal basis of our work. Pdf synopsis the comprehensive vibration assessment. International cofinancing of nuclear reactors between. The paper discusses the unique design features of ap. Sanmen unit 1 entered into commercial operation on september 21, 2018.
Sep 04, 2015 the ap plant is an 1100mwe pressurized water reactor pwr with passive safety features and extensive plant simplifications that enhance construction, operation, maintenance, safety, and costs. Mechanical control rod drive shaft unlatching tool. This is all clearly documented in published guidance on our website. Regarding to the ap reactor, it is equipped with a passive containment cooling system pcs. Certification testing and analysis of the ap600 and ap reactor designs for westinghouse were conducted at the apex facility at oregon state university. The ap is a nuclear power plant designed and sold by westinghouse electric company. Sanmen is the first implementation of the ap pressurized water reactor pwr developed by westinghouse electric company. Introduction and general description of the plant ap. Research article simulation of the westinghouse ap. Control parameter optimization for ap reactor using. As to ao, both of the two control strategies make similar effects. Overnight construction cost from the outset, the ap pwr was designed to reduce capital costs and to be economically competitive with contemporary fossilfueled plants. Spent ap fuel will be stored in a waterfilled pool.
Ap reactor is 3400 thermal mw pressurized water reactor design by american. But a new report for radiation free lakeland shows that the chosen ap reactor design, for all its claimed advanced passive safety features, is not fit for purpose and should be rejected as unsafe by uk regulators. Ap600 and ap have been proven in operating reactors under similar flow, temperature, and pressure conditions, except for the ap reactor coolant pump. Ap nuclear power plant design by westinghouse electric. Jan 01, 2016 the ap reactor core simulation platform is developed in matlabsimulink with implementation of the nodal core model and the mshim control strategy. The ap is a twolooppressurized water reactor pwr with passive safety features and extensive plant simplifications that enhance its construction, operation, maintenance and safety. These three reactors together would have a capacity of up to 3. The system consists of two heat transfer circuits, each with a steam generator, two reactor coolant.
Ap reactors at moorside in cumbria a site adjacent to sellafield. The akademik lomonosov floating nuclear power plant. From figure 9, it can be seen that the reactor power follows the desired power well for both the original and modified control strategies. Westinghouse completed generic design assessment gda step 4 in 2011 and paused the regulatory process.
Based on nearly 20 years of research and development, the ap builds and improves. Nuclear regulation onr gda for the ap reactor design within the topic of reactor chemistry. Energy and exergy based performance analysis of westinghouse. Great interest is given now to advanced nuclear reactors especially those using passive safety components. Simulation of the westinghouse ap response to sbloca. Gi ap rc02 arose because the design of the sampling systems that allow the operator. In the sealless design, all rotating components are inside a pressure vessel. Analysis of the ap passive containment cooling system. Curtisswright successfully completes qualification testing of lead. The addition of a heavy metal alloy flywheel to provide the rotating inertia needed for flow coastdown is based on the design of the ap600 reactor coolant pumps. Minor actinide transmutation characteristics in ap. The ap reactor vessel design pressure and temperature is 2500 psia 17.
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