Designing of new generation of the nuclear reactors

Okunev, V. S.

doi:10.1063/1.5140112

Cited by 16 publications

(23 citation statements)

References 12 publications

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“…As noted in work [5], "all emergency modes of a fast reactor with a liquid metal coolant can be initiated by a change (perturbation) of the coolant flow rate G, temperature T in coolant at the core inlet, reactivity ρ. The uncertainty scenarios of emergency situations is determined by the uncertainty of the perturbation (δG, δT in , δρ), initiating one or the other mode, the uncertainty of time to make the perturbation of the law by which the value of the perturbation varies with time (usually considered instantaneous perturbations, linear, exponential or hyperbolic laws) uncertainty of the delay time of a disturbance (at imposing emergency).…”

Section: Resultsmentioning

confidence: 99%

“…The groups of modes are considered: LOF WS (δG < 0), TOP WS (δρ > 0), LOHS WS (δT in > 0), OVC WS (δG > 0, δT in < 0) and LOCA WS [5].…”

Section: Resultsmentioning

confidence: 99%

“…This method can be used in any ooptimizations codes. If you are using more sophisticated (than in the "Dragon-M") models for calculating functionals, especially precision that it is now possible, thanks to the development of computer technology, it may be appropriate to use no iteration methods search for the optimum, for example, the penalty function method [11], and decomposition problems in the complexity of the mathematical model based on the use of hierarchical structures with controlled accuracy, precision designed on the basis of models [5]. The method proposed by the author corresponds to the phenomenological method of safety analysis described in [7].…”

Section: Discussionmentioning

confidence: 99%

“…The problem of optimal design (with one or several criteria) under conditions of uncertainty of the initial information was formulated by the author in [5] as follows.…”

Section: Methodsmentioning

confidence: 99%

“…known min n w and max n w (n = 1, 2,…, N)." The software package "Dragon-M" [5] for the first time made it possible to obtain the results of solving these problems with an indefinite source of information.…”

Section: Methodsmentioning

confidence: 99%

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An effective method for accounting for the uncertainty of scenarios for the development of emergency situations in nuclear reactors

Okunev

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The main goal of the research is to develop a method for accounting for uncertain data on scenarios for the development of emergency situations in nuclear reactors of a new generation. The method involves reducing the number of deterministic analogs (ideally, to two), in which the problems of reactor optimization (mathematical programming) should be solved. The proposed method is much more efficient in comparison with traditional techniques based on the use of uniformly distributed sequences. With the same accuracy, it was possible to reduce the calculation time by an order of magnitude. As an example, the layout of the BN-800 type reactor with sodium coolant and nitride fuel is considered. The most dangerous emergency situations - ATWS (anticipated transient without scram) - are considered. The researches carried out by the author make it possible to obtain the characteristics of a new generation reactor, which are optimal for a given criterion, in which severe accidents are excluded. This is the significance of research. The method can be used to study reactors of various types. The method is relevant at the initial stages of reactor development.

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Section: Resultsmentioning

confidence: 99%

“…The groups of modes are considered: LOF WS (δG < 0), TOP WS (δρ > 0), LOHS WS (δT in > 0), OVC WS (δG > 0, δT in < 0) and LOCA WS [5].…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…The problem of optimal design (with one or several criteria) under conditions of uncertainty of the initial information was formulated by the author in [5] as follows.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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An effective method for accounting for the uncertainty of scenarios for the development of emergency situations in nuclear reactors

Okunev

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Modeling Emergency Modes of a Nuclear Reactor: Minimization of the Amount of Information in Training Problems

Okunev

2023

Lecture Notes in Networks and Systems

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The concept of a fast reactor with liquid metal fuel in tungsten capsules

Okunev

2023

E3S Web Conf.

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The concept of a dual-purpose high-power nuclear reactor is proposed. One of the goals is the production of electricity, the other is the production of high-potential thermal energy. It is proposed to use liquid fuel based on waste uranium and plutonium extracted from the spent fuel of VVER reactors (purified from the 238Pu isotope). The fuel is in sealed tungsten capsules. Lead extracted from thorium ores is used to cool the reactor. The electrical power of the reactor is 3.3 GW. The layout of the reactor is identical to the BREST-OD-300 reactor under construction. The analysis of emergency modes from among ATWS (anticipated transients without scram) is carried out. The reactor is reliable and safe. The maximum temperature of a high-temperature reactor coolant is close to the boiling point of lead. By the nature of the change in the maximum temperatures of the core components, the reactor occupies an intermediate position between a reactor with solid metallic fuel and a reactor with cermets based on UN-PuN and metal uranium nanopowder.

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Designing of new generation of the nuclear reactors

Cited by 16 publications

References 12 publications

An effective method for accounting for the uncertainty of scenarios for the development of emergency situations in nuclear reactors

An effective method for accounting for the uncertainty of scenarios for the development of emergency situations in nuclear reactors

Modeling Emergency Modes of a Nuclear Reactor: Minimization of the Amount of Information in Training Problems

The concept of a fast reactor with liquid metal fuel in tungsten capsules

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