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Patent
State Nuclear Power Research Institute and State Nuclear Power Technology Corporation Ltd. | Date: 2015-04-03

A passive containment heat removal system and a control method thereof are provided. The system includes an outer containment; an inner containment disposed in the outer containment, an air duct formed between the inner containment and the outer containment having an air inlet and an air outlet; a spraying assembly disposed outside the inner containment and configured to passively spray cooling water to an outer wall of the inner containment to cool the inner containment; a built-in heat exchanger disposed in the inner containment; an air cooling channel having an air inlet of the air cooling channel and an air outlet of the air cooling channel; an external air cooler disposed in the air cooling channel with an inlet connected with an outlet of the built-in heat exchanger via a first communicating pipe and an outlet connected with an inlet of the built-in heat exchanger via a second communicating pipe.


Lin M.,Shanghai JiaoTong University | Chen P.,State Nuclear Power Technology Corporation
Annals of Nuclear Energy | Year: 2012

This paper reports an experimental study and photographic investigation of the subcooled flow boiling on plain and augmented (hypervapotron) surfaces. The test sections are single-side heated and have a projected heating surface of 12.25 × 100 mm. Subcooled flow boiling heat transfer results were obtained from onset of nucleate boiling to critical heat flux and film boiling under conditions of inlet subcooling range from 10 °C to 30 °C, outlet pressure range from 0.4 to 0.8 MPa and mass flow rate range from 124 to 372 kg/m 2 s. The data of bubble growth, bubble departure size, nucleation distribution are measured. Nucleation distribution has an exponential relationship with uniform heat flux under moderate and high heat flux in subcooled flow boiling. The high nucleation density results in liquid supply shortage for nucleation and local dryout, which possibly initiates CHF. The visualization data did not show significant difference in hypervapotron structure with respect to bubble growth, departure and nucleation distribution, although hypervapotron delivers 40-50% higher CHF under same thermohydraulic conditions. © 2012 Elsevier Ltd. All rights reserved.


Ge D.,Shanghai JiaoTong University | Zhang R.,State Nuclear Power Technology Corporation | Chou Q.,State Nuclear Power Technology Corporation | Yang Y.,Shanghai JiaoTong University
Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability | Year: 2015

Many sequence- and function-dependent failure behaviors may exist in fault-tolerant systems, in which the failure of the systems depends not only on the combination of basic events but also on their failure sequences. Such systems can be modeled by dynamic fault tree with Priority AND gate, Spare gate, Sequence Enforcing gate and Functional Dependence gate. The existing analytical methods for analyzing these dynamic gates are mainly Markov-based or inclusion-exclusion-based approaches. Compared with Markov approaches, the inclusion-exclusion-based method presents notable advantages. However, to the author's knowledge, no references by far have presented general multi-integration formulas applicable for solving a generalized minimal cut sequence, which is an unavoidable problem in inclusion-exclusion-based method. In this article, new multi-integration formulas are proposed based on traditional probabilistic models, which are applicable for solving a generalized minimal cut sequence as well as any dynamic gate. The rigorous derivation processes are given. The application and advantages of our proposed approach are demonstrated through a case study and the results indicate our proposed approach is reasonable. © IMechE 2014.


Liu Z.,State Nuclear Power Technology Corporation | Fan J.,State Nuclear Power Technology Corporation
Progress in Nuclear Energy | Year: 2014

Small Modular Reactor (SMR) is an emerging energy technology that meets the demand of safety, efficiency and sustainability. This paper reviews the representative SMR designs. Comparisons are made between each current SMR and its originating design, obtaining a summarization of the development course and the innovation features of each SMR version. To get a comprehensive understanding of SMR, this paper suggests a bidirectional assessment method. In the longitudinal direction, assessments focus on technology evolution, especially SMR's approaches to safety and its responses to Fukushima accident. In the transversal direction, a breakdown of SMR leads to the detailed assessment of its systems and equipments, thus identifying the maturity and inadequacy of a certain SMR design. Based on empirical analysis, this paper suggests an approximate ten year effort be needed for the leading light water reactor (LWR) based SMR to solidify the final form and operate under the full range of commissioning conditions. © 2013 Elsevier Ltd. All rights reserved.


Wang H.,State Nuclear Power Technology R and nter | Chen P.,State Nuclear Power Technology Corporation
International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015 | Year: 2015

The AP1000 nuclear power plant safety system is characterized by its unique passive Emergency Core Cooling System (ECCS), including Core Makeup Tanks (CMTs), Automatic Depressurization System (ADS), and In-containment Refueling Water Tank (IRWST), to mitigate SBLOCA accident. The most challenging period of AP1000 SBLOCA transient is the transition from CMT injection to IRWST injection after the actuation of the fourth stage ADS (ADS4). This paper is to report a transient evaluation model for AP1000 SBLOCA analysis during CMT to IRWST transition. The model simulates ADS4, CMT injection, IRWST injection, reactor core mixture level and upper plenum entrainment to hotlegs. Both critical and non-critical flow models are used to calculate mass flow loss through ADS 1-4 vents. The most important feature of this model is that it constantly traces core/upper plenum two-phase mixture level, which demonstrates cooling capability of ECCS during the transient. A baseline case is analyzed to study ADS-IRWST transient using AP1000 prototypic information. In addition, a sensitivity analysis is performed to further study the robustness of AP1000 ECCS during SBLOCA transient.


Patent
State Nuclear Power Technology Corporation Ltd., Shanghai Nuclear Engineering Research and Design Institute | Date: 2014-01-08

A flow distribution device (3) for a reactor, a lower internals (100) of a reactor and a reactor are provided. The lower internals (100) includes: a lower core support plate (2) defining a coolant hole therethrough; a flow distribution device (3) mounted on the lower core support plate (2) and including a distribution annular plate (8) and a distribution bottom plate (9); a vortex suppression plate (7) disposed below the distribution bottom plate (9); a support column (4) defining an upper end connected with the lower core support plate (2) and a lower end passing through the distribution bottom plate (9) to connect with the vortex suppression plate (7); an energy absorption device (5) defining an upper end connected with the vortex suppression plate (7); and an anti-break bottom plate (6) disposed on the lower end of the energy absorption device (5).


Patent
State Nuclear Power Technology Corporation Ltd. and Shandong Nuclear Power Equipment Manufacturing Co. | Date: 2014-04-09

A head module for a large-scale container, a large-scale container having the head module, and methods for manufacturing the head module and the large-scale container. The method for manufacturing a head module comprises providing a head having an annular opening, the head being composed of a plurality of petals, providing a plurality of cylinder plates, and forming a head cylindrical ring, connecting in order the plurality of cylinder plates to the end surface of the annular opening and joining facing sides of all adjacent cylinder plates. Based on the unfitness of the petals at the annular opening of the head, gaps between adjacent cylinder plates may be adjusted, and/or the positions of the cylinder plates on the end surface of the annular opening of the head may be adjusted radially inwards or outwards.


Trademark
State Nuclear Power Technology; Corporation Ltd. | Date: 2013-06-12

Moderating materials for nuclear reactors; fissionable material for nuclear energy; alkaline metals; soldering chemicals; sulphides; metal annealing preparations; fissionable chemical elements; fireproofing preparations; industrial chemicals; chemical preparations for scientific purposes, other than for medical or veterinary use. Electrical energy; nuclear fusion energy; electricity; coal; wax raw material; candles; dust binding compositions for sweeping. Alloys of common metal; pipes of metal; building materials of metal; ropes of metal; clips of metal for cables and pipes; washers of metal; handling pallets of metal; tanks of metal; signboards of metal; rods of metal for welding. Data processing apparatus; nuclear power station control system; power station automation equipment; distribution consoles electricity; measuring instruments; materials for electricity mains wires, cables; carbon materials (terms too vague in the opinion of the International Bureau - Rule 13(2)(b) of the Common Regulations); high voltage explosion protection device; protection devices for personal use against accidents; control panels electricity. Processing installations for fuel and nuclear moderating material; polymerisation installations; nuclear reactors; lighting apparatus and installations; refrigerating appliances and installations; ventilation air-conditioning installations and apparatus; heating apparatus for solid, liquid or gaseous fuels; solar thermal collectors heating; water purifying apparatus and machines; heating installations water. Printed matter; printed publications; magazines periodicals; office requisites, except furniture; stationery; paper; posters; prospectuses; document laminators for office use; clips for offices. Stuffing rings; caulking materials; reinforcing materials, not of metal, for pipes; shock absorbing buffers of rubber; asbestos coverings; soundproofing materials; insulating materials; insulators for electric mains; insulating oils; insulating paints. Building materials, not of metal; concrete building elements; tiles, not of metal; refractory construction materials, not of metal; bitumen; buildings, not of metal; building glass; non-metal building coating materials; coatings building materials; lighting slabs. Advertising; marketing studies; organization of technical exhibition; organization of trade fairs for commercial or advertising purposes; import-export agencies; computerized file management; systemization of information into computer databases; commercial administration of the licensing of the goods and services of others; procurement services for others purchasing goods and services for other businesses; personnel recruitment. Building construction supervision; construction; furnace installation and repair; burner maintenance and repair; machinery installation, maintenance and repair; electric appliance installation and repair; air conditioning apparatus installation and repair; lighting equipment installation and repair; motor vehicle maintenance and repair; rustproofing. Electricity distribution; distribution of energy; transport; storage; physical storage of electronically-stored data or documents; arranging of tours; parcel delivery; car rental; boat transport; freighting. Production of energy; material treatment information; metal treating; woodworking; paper finishing; optical glass grinding; firing pottery; photographic printing; decontamination of hazardous materials; air purification. Instruction services; arranging and conducting of congresses; arranging and conducting of symposiums; lending libraries; publication of electronic books and journals on-line; production of shows; club services entertainment or education; health club services health and fitness training; arranging and conducting of seminars; arranging and conducting of colloquiums. Technical research; engineering; quality inspection; chemical analysis; material testing; mechanical research; packaging design; development of construction projects; computer programming; evaluation of intangible assets. Licensing of intellectual property; intellectual property watching services; inspection of factories for safety purposes; monitoring of burglar and security alarms; security consultancy.


Trademark
State Nuclear Power Technology; Corporation Ltd. | Date: 2013-06-12

Moderating materials for nuclear reactors; fissionable material for nuclear energy; alkaline metals; soldering chemicals; sulphides; metal annealing preparations; fissionable chemical elements; fireproofing preparations; industrial chemicals; chemical preparations for scientific purposes, other than for medical or veterinary use. Electrical energy; nuclear fusion energy; electricity; coal; wax raw material; candles; dust binding compositions for sweeping. Alloys of common metal; pipes of metal; building materials of metal; ropes of metal; clips of metal for cables and pipes; washers of metal; handling pallets of metal; tanks of metal; signboards of metal; rods of metal for welding. Nuclear power station control system; power station automation equipment; distribution consoles electricity; quantity indicators; measuring instruments; materials for electricity mains wires, cables; carbon materials (terms too vague in the opinion of the International Bureau - Rule 13(2)(b) of the Common Regulations); control panels electricity; high voltage explosion protection device; protection devices for personal use against accidents. Processing installations for fuel and nuclear moderating material; polymerisation installations; nuclear reactors. Printed matter; printed publications; magazines periodicals; office requisites, except furniture; stationery; paper; posters; prospectuses; document laminators for office use; clips for offices. Concrete building elements; tiles, not of metal; refractory construction materials, not of metal; bitumen; sandstone for building; building glass; gypsum; cement; lighting slabs; safety glass. Advertising; marketing studies; organization of technical exhibition; organization of trade fairs for commercial or advertising purposes; import-export agencies; computerized file management; systemization of information into computer databases; commercial administration of the licensing of the goods and services of others; procurement services for others purchasing goods and services for other businesses; personnel recruitment. Building construction supervision; construction; furnace installation and repair; burner maintenance and repair; machinery installation, maintenance and repair; electric appliance installation and repair; air conditioning apparatus installation and repair; lighting equipment installation and repair; motor vehicle maintenance and repair; rustproofing. Electricity distribution; distribution of energy; vehicle rental; physical storage of electronically-stored data or documents; arranging of tours; parcel delivery; marine transport; freighting; water distribution; packaging of goods. Production of energy; material treatment information; metal treating; woodworking; paper finishing; optical glass grinding; firing pottery; photographic printing; decontamination of hazardous materials; air purification. Instruction services; arranging and conducting of congresses; arranging and conducting of symposiums; lending libraries; publication of electronic books and journals on-line; production of shows; club services entertainment or education; health club services health and fitness training; arranging and conducting of seminars; arranging and conducting of colloquiums. Technical research; engineering; quality inspection; chemical analysis; material testing; mechanical research; packaging design; development of construction projects; computer programming; evaluation of intangible assets. Licensing of intellectual property; intellectual property watching services; inspection of factories for safety purposes; monitoring of burglar and security alarms; security consultancy.


Trademark
State Nuclear Power Technology; Corporation Ltd. | Date: 2013-06-12

Moderating materials for nuclear reactors; fissionable material for nuclear energy; alkaline metals; soldering chemicals; sulphides; metal annealing preparations; fissionable chemical elements; fireproofing preparations; industrial chemicals; chemical preparations for scientific purposes, other than for medical or veterinary use. Electrical energy; nuclear fusion energy; electricity; fuel; lubricating oil; coal; wax raw material; candles; dust binding compositions for sweeping; industrial oil. Alloys of common metal; pipes of metal; building materials of metal; ropes of metal; clips of metal for cables and pipes; washers of metal; handling pallets of metal; tanks of metal; signboards of metal; rods of metal for welding. Data processing apparatus; nuclear power station control system; power station, automation equipment; control panels electricity; measuring instruments; materials for electricity mains wires, cables; carbon materials (terms too vague in the opinion of the International Bureau - Rule 13(2)(b) of the Common Regulations); distribution consoles electricity; high voltage explosion protection device; protection devices for personal use against accidents. Processing installations for fuel and nuclear moderating material; polymerisation installations; nuclear reactors; lighting apparatus and installations; refrigerating appliances and installations; ventilation air-conditioning installations and apparatus; heating apparatus for solid, liquid or gaseous fuels; solar thermal collectors heating; water purifying apparatus and machines; heating installations water. Printed matter; printed publications; magazines periodicals; office requisites, except furniture; stationery; paper; posters; prospectuses; document laminators for office use; clips for offices. Stuffing rings; caulking materials; reinforcing materials, not of metal, for pipes; shock absorbing buffers of rubber; asbestos coverings; soundproofing materials; insulating materials; insulators for electric mains; insulating oils; insulating paints. Building materials, not of metal; concrete building elements; tiles, not of metal; refractory construction materials, not of metal; bitumen; buildings, not of metal; building glass; non-metal building coating materials; coatings building materials; lighting slabs. Advertising; marketing studies; organization of technical exhibition; organization of trade fairs for commercial or advertising purposes; import-export agencies; computerized file management; systemization of information into computer databases; commercial administration of the licensing of the goods and services of others; procurement services for others purchasing goods and services for other businesses; personnel recruitment. Building construction supervision; construction; furnace installation and repair; burner maintenance and repair; machinery installation, maintenance and repair; electric appliance installation and repair; air conditioning apparatus installation and repair; lighting equipment installation and repair; motor vehicle maintenance and repair; rustproofing. Electricity distribution; distribution of energy; transport; storage; physical storage of electronically-stored data or documents; arranging of tours; parcel delivery; car rental; boat transport; freighting. Production of energy; material treatment information; metal treating; woodworking; paper finishing; optical glass grinding; firing pottery; photographic printing; decontamination of hazardous materials; air purification. Instruction services; arranging and conducting of congresses; arranging and conducting of symposiums; lending libraries; publication of electronic books and journals on-line; production of shows; club services entertainment or education; health club services health and fitness training; arranging and conducting of seminars; arranging and conducting of colloquiums. Technical research; engineering; quality inspection; chemical analysis; material testing; mechanical research; packaging design; development of construction projects; computer programming; evaluation of intangible assets. Licensing of intellectual property; intellectual property watching services; inspection of factories for safety purposes; monitoring of burglar and security alarms; security consultancy.

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