This mark may also be used andor registered in other countries throughout the world. Design of the ap power reactor warsaw university of. It belongs in the same class of reactors as the areva epr but with a net electrical power of 1100mw compared to 1600 mw of the epr. For aps nuclear and secondary steam supply system, despite numerous evolutionary improvements, it is similar to the conventional pwrs. Nuclear regulatory commission nrc is soliciting public comment on its generic technical specification travelers gtsts for the development of standard technical specifications sts for the ap certified reactor design based on the ap generic technical specifications gts. The advancedpassive safety systems on the ap pwr provide an unmatched level of defenseindepth. Ap reactor projects in the us, the uk and india wise. The reactor coolant system rcs consists of two heat transfer circuits, with each circuit containing one steam generator, two reactor coolant pumps, and a single hot leg and two cold legs for circulating coolant between the reactor and the steam generators. Instrumentation and controls ap design control document tier 2 material 7. Ultimately, the goal of assessment is to reach an independent and informed judgment on the adequacy of safety in the generic design. Generic design assessment ap nuclear power plant design by. A bittersweet milestone for the worlds safest nuclear reactors. Ap is a twoloop pressurized water reactor pwr developed by.
China loads fuel at worlds first ap nuclear reactor. The ap nuclear reactor design executive summary the ap advanced passive nuclear reactor design has a weaker containment, and fewer backup safety systems than current reactor designs. Nugen preparing to apply for a nuclear site licence to build and operate three ap reactors at moorside in cumbria. Nuclear reactor types 3 the most widely used reactor type in the world is the pressurised water reactor pwr see fig 1. Sensitivity evaluation of ap nuclear power plant best. Download pdfreactor convert html to pdf, html to pdf. Jan 02, 2020 final safety evaluation report related to certification of the ap standard design september 2011 supplement 1. Slide 4 naturally occurring physical phenomena used in operation of safety systems znatural circulation of air, water, and steam zgravity and gas pressure drive flow of cooling water. Westinghouse ap technical report office for nuclear. The plant is a pressurized water reactor with improved use of passive nuclear safety and many design features intended to lower its capital cost and improve its economics. Final safety evaluation report related to certification of the ap standard design september 2004. For nearly two decades, westinghouse has pursued an improved pressurized water reactor pwr design. The ap is a pressurized water reactor pwr moderated and cooled by light normal water using enriched uranium fuel. Apr 07, 2010 by design, the ap containment has an even higher vulnerability to corrosion than containment systems of current reactor designs because the outside of the ap containment is subject to a highoxygen and highmoisture environment conducive to corrosion and is prone to collect moisture in numerous inaccessible.
In the sealless design, all rotating components are inside a pressure vessel. Ap reactor plans in india world nuclear news reported on june 2 that six ap reactors planned for the mithi virdi plant in the bhavnagar district of indias northern gujarat state will now be constructed at the kovvada site in the southern state of andhra pradesh. With the ap, westinghouse sought to design a reactor that operated using conventional pressurized water reactor principles, while incorporating novel safety measures in order to increase reliability and costcompetiveness relative to competing reactor plants. These two systems are the passive core cooling system. The ap is a twoloop mwe pressurizer water reactor pwr. Federal register ap standard technical specifications. For both, the reactor vessel is the same as that for a standard.
The rcca absorber material is a very high thermal neutron absorber silverindiumcadmium alloy, with additional resonance absorption to enhance rod worth. China begins construction of worlds first ap reactor. The ap reactor vessel design pressure and temperature is 2500 psia 17. The ap is a twoloop pressurized water reactor planned to produce a net power output of 1,117 mwe. Westinghouse ap pressurized water reactor steam generator. Aug 29, 2015 reactor coolant pumps for ap still a problem august 29, 2015 by rod adams 27 comments this is a story that i really dont want to tell, but bad news is like old fish. Final safety evaluation report related to certification of the ap standard design december 2005 initial report. Westinghouse ap advanced passive plant sciencedirect. In particular, the aps passive safety features are described as.
Benchmarking of the wims9parcstrace code system for. In this paper, as per the plant design requirements, ap control systems were simulated, and plant thermalhydraulic performance analysis have been performed with relap5 thermalhydraulic computer code under five typical operational transients, i. This stainless steel filler weld joins the seal ring. The primary circuit of the ap reactor retains most of the general. Design acceptance confirmation issued in march 2017. The reactor primary coolant has two steam generators with four coolant pumps 2x4 configuration. Abstract the ap is a twoloop, mwe pressurized water reactor pwr with passive safety features and extensive plant simplifications that enhance. Apr 28, 2018 beijing, april 28 reuters china started loading fuel this week at a westinghousedesigned ap nuclear reactor the worlds first in sanmen, eastern zhejiang province, as the long. Westinghouse electric company llc ap nuclear reactor. The aps ascent in china began in 2004 when the government launched a rigorous twoyear evaluation aimed at selecting an advanced western reactor design that would underpin its future. 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. The westinghouse advanced passive pwr ap is an 1100. Reactor coolant pumps for ap still a problem august 29, 2015 by rod adams 27 comments this is a story that i really dont want to tell, but bad news is like old fish.
The four pipes 101, 104106 simulate the annular downtake channels from different directions. Ap reactor design is dangerous and not fit for purpose. Enhanced modeling features in wims9 facilitated neutronics modeling of the reactor. A field weld is made, after the reactor vessel has been set, to install the permanent reactor vessel cavity seal ring. Figure 2 shows that the ap nuclear power plant reactor has two cold legs and two hot legs, which are the entrance and discharge boundaries, respectively. Pressurized water reactor power plant this material was, for a purpose to be used in a nuclear education, compiled comprehensively with a caution on appropriateness and neutrality of information, based on references of neutral organizations, suh as nrc, wikipedia and atomica, and vendors information especially on advanced reactors. Passive safety systems are used to provide significant and measurable improvements in plant simplification, safety, reliability, investment protection and plant costs. Roger hannah senior public affairs officer region ii. Passive safety related systems the ap plant safety. Study of the reactor control system of mshim in ap hindawi. The advanced passive ap is a nuclear pressurized water reactor pwr originally designed by westinghouse electric company.
Ap is a registered trademark in the united states of westinghouse electric company llc, its subsidiaries andor its affiliates. Passive safety systems and timeline for station blackout. Beijing, april 28 reuters china started loading fuel this week at a westinghousedesigned ap nuclear reactor the worlds first in sanmen, eastern zhejiang province, as the long. Operation and maintenance manual air power pack models ap, ap q ap 1025 conroy place, easton pa 18040 u. Reactor design the ap reactor coolant pump motors are rated on the less dense hot water at operating temperature in lieu of although different from each other, the core, reactor the more dense ambient temperature water for the ap600. Chapter 4, reactor, ap final safety evaluation report. Operation and maintenance manual air power pack models ap, apq ap 1025 conroy place, easton pa 18040 u. Nodal dynamics modeling of ap reactor for control system.
Pctrans right hand side control panels are similar to a conventional pwr. Zhao, nodal dynamics modeling of ap reactor for control system design and. For ap s nuclear and secondary steam supply system, despite numerous evolutionary improvements, it is similar to the conventional pwrs. Study of the reactor control system of mshim in ap. Parcstrace coupled code system was used to model the temperature feedback effects. The proposed code was used to model neutronicsth behavior of the ap reactor. The result of this commitment is the ap, a simpler and more economical pwr. Enclosure safety evaluation report with open items for. The ap tm is a twoloop pressurized water reactor pwr that uses a simplified, innovative and effective approach to safety.
Construction of the worlds first nuclear power plant to use u. The saps require that reactor chemistry on a nuclear power plant be identified and considered in safety assessments. This report is the first of our public statements for the ap reactor designed by. The shippingport reactor was the prototype of the large pressurized water reactors that were built subsequently in the u.
Chapter 4, reactor, ap final safety evaluation report fser. Design of the ap power reactor bernd doehnert westinghouse electric belgium key words. Reactor design although different from each other, the core, reactor vessel, and internals of both the ap600 and ap are essentially those of conventional westinghouse pwrs. The two commercial reactor types based on this principle are both american designs, but are widely used in over 20 countries. The ap plant is equipped with two passivesafety systems see fig. The ap is an advanced pressurized water reactor pwr design developed by westinghouse which implements passive safety systems to provide core cooling in case of accident.
Using the contested approval of the ap reactor by the us nuclear regulatory commission nrc as a case. Trace code system for neutronic calculations of the. Nis integrates the broad capabilities and deep technical knowledge of experienced people in a broad range of disciplines. Nuclear integrated services nis has extensive experience solving technical, licensing and operational issues for operating nuclear plants. Nrc slams westinghouse aps flawed design two new reactor designs were forecast at least in europe and northamerica make the nuclear renaissance happen.
The pdfreactor software license agreement can be found here. Final safety evaluation report related to certification. The reactor coolant system rcs is described in chapter 5. The ap plant and the china project commissioning success. The ap is a nuclear power plant designed and sold by westinghouse electric company. Nov, 20 introduction the westinghouse electric company llc westinghouse ap pressurized water reactor pwr reactor coolant system rcs is similar in design to the combustion engineering ce rcs design, with a reactor vessel rv housing the core, two steam generators sgs, four reactor coolant pumps rcps, and a pressurizer. The ap plant safetyrelated passive systems and equipment are sufficient to automatically establish and maintain core cooling and containment integrity indefinitely following designbasis events, assuming the most limiting single failure, with no operator action, and no onsite or offsite ac power sources. By design, the ap containment has an even higher vulnerability to corrosion than containment systems of current reactor designs because the outside of the ap containment is subject to a highoxygen and highmoisture environment conducive to corrosion and is prone to collect moisture in numerous inaccessible. Final safety evaluation report related to certification of the ap standard design september 2011 supplement 1. 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. Surfaces, which can become wetted during operation and refuelling, are clad with stainless steel welded overlay. 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. The westinghouse ap pressurized water reactor pwr is the most advanced commercially available nuclear power plant. Conventional reactors rely on defenceindepth made up of layers of redundancy and diversity this is where, say, two valves are fitted instead of one.
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