Sodium coolant purification systems for a nuclear power station equipped with a BN-1200 reactor

Алексеев, В. В.; Kovalev, Yu. P.; Kalyakin, S. G.; Kozlov, F. A.; Kumaev, V.Ya.; Кондратьев, А. С.; Matyukhin, Vladislav; Pirogov, E. P.; Sergeev, G. P.; Сорокин, А. П.; Torbenkova, I. Yu.

doi:10.1134/s0040601513050017

Cited by 8 publications

(5 citation statements)

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“…Emphasis was required to be placed on the development of a cold trap for a large reactor with its single-tank design (Alekseev et al 2013). A conceptually new combined impurity removal system has been proposed and justified for a high-temperature hydrogen producing NPP with the sodium coolant temperature of ~ 900 °С, which allows all possible modes of operation .…”

Section: Removal Of Impurities and Control Of Impurity Content In Alk...mentioning

confidence: 99%

Study into the physical chemistry and technology of alkali liquid metal coolants for nuclear and thermonuclear power plants

Сорокин¹,

Kuzina²,

Ashadullin³

et al. 2023

NUCET

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It is shown that, as the result of developing alkali liquid metal coolants, including sodium, eutectic sodium-potassium alloy, lithium and cesium, the scientific basis has been established for their application in nuclear power. The paper presents data from investigations of thermophysical, neutronic and physicochemical properties and characteristics of various alkali liquid metal coolants, the content of solid-phase and dissolved impurities in coolants, mass transport of impurities in circulation circuits with alkali liquid metal coolants, development of systems for removal of impurities, and control of the content of impurities in alkali liquid metal coolants. Alkali liquid metal coolants are considered as a part of a system that includes a structural material in contact with the coolant, and a gas space that compensates for the thermal expansion of the coolant. The state of the system is defined by the physicochemical properties of the system’s components. And the coolant and the structural materials also represent subsystems consisting of a base material, a coolant and impurities contained both in the material and in the coolant. It has been shown that each alkali liquid metal coolant has its own set of impurities that define its technology. It depends on the physicochemical properties of the solution of the structural material impurities and components in the coolant. Objectives have been formulated for investigating further alkali liquid metal coolants, as stemming from the need to improve the efficiency, environmental friendliness, reliability and safety, and for extending the life of nuclear power plants in operation or under design. Alkali liquid metals are promising candidate materials for being used in thermonuclear power not only as the coolant but also as the tritium breeding medium. These include, first of all, lithium and its eutectic alloy with lead (17 at. % of lithium). The possibility for using lithium or a lithium-lead alloy as a coolant in the blanket of the international thermonuclear power reactor is compared.

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Section: Removal Of Impurities and Control Of Impurity Content In Alk...mentioning

confidence: 99%

Study into the physical chemistry and technology of alkali liquid metal coolants for nuclear and thermonuclear power plants

Сорокин¹,

Kuzina²,

Ashadullin³

et al. 2023

NUCET

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“…Two trap designs, with argon and sodium cooling, have been proposed for the large reactor (Alekseev et al 2013, Kalyakin et al 2014.…”

Section: In-tank Cold Trapsmentioning

confidence: 99%

“…The trap height was reduced and its geometrical parameters were somewhat optimized for the second version developed with cooling by argon pressurized to 1.5 MPa. The working space volume is 1.75 m 3 (Alekseev et al 2013), and the estimated impurity capacity is 350 kg.…”

Section: In-tank Cold Trapsmentioning

confidence: 99%

“…The table shows that the efficiency and capacity of the purification system for the advanced argon-cooled BN reactor are nearly thrice as low as for the BN-600 reactor and nearly 2.5 times as low with sodium cooling respectively. This means that the time for the advanced reactor primary coolant purification using three argon-cooled CTs, other conditions being equal, will be nearly three times as great as for BN-600 (Alekseev et al 2013). It should be noted that an economic analysis is required for the final selection of the cold trap version.…”

Section: In-tank Cold Trapsmentioning

confidence: 99%

“…The goal is to improve the trap in terms of safety, cost effectiveness and environmental friendliness. The first versions of such traps have been developed (Kozlov et al 2012, Alekseev et al 2013, Kalyakin et al 2014. For the initial consideration, argon has been selected as the coolant for the trap cooling.…”

Section: Introductionmentioning

confidence: 99%

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Conceptual issues of the cold filter trap development for the sodium coolant purification in fast-neutron reactors

Alekseev¹,

Kuzina²,

Сорокин³

2020

NUCET

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The paper presents the results of studying the peculiarities of heat and mass exchange in cold traps for the sodium purification of impurities in fast reactor circuits both in dedicated test areas simulating various trap components (isothermal sump, nonisothermal sump, filters, final cooling area) and in trap prototype models. As a result, a scientific rationale has been formed for developing traps of a unique design for various reactors. The impurity capacity of the traps is three to four times as high as that of the best foreign counterparts. Tests have shown these to be highly efficient in purifying sodium of oxygen and hydrogen and much less efficient in sodium purification of corrosion products and carbon. Taking into account the leakage of radioactive sodium during operation of the BN-600 reactor primary circuit traps, a decision was made to install the purification system in the reactor tank to improve the safety of the large fast reactor. It was resolved to exclude the accumulation of hydrogen in the primary circuit traps in nominal conditions. Two trap designs, with argon and sodium cooling, are discussed. It has been shown that operation of the reactor purification system with argon cooling will require 20 trap replacements during the reactor operating life and seven replacements if the deposition of hydrogen into the primary circuit cold traps is excluded. The sodium-cooled version of the trap built in the reactor tank has the same overall dimensions as the argon-cooled trap. The cooling sodium circulates in two trains: outside the jacketed working space body (up to 30% of the flow rate) and in the coil inside of the working space (up to 70% of the flow rate). Updates have been proposed to the trap design based on the calculations using the codes simulating the in-trap processes of heat and mass exchange.

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Physical Chemistry and Technology of Alkaline Liquid-Metal Coolant: A Retrospective-Perspective Look

2020

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Sodium coolant purification systems for a nuclear power station equipped with a BN-1200 reactor

Cited by 8 publications

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Study into the physical chemistry and technology of alkali liquid metal coolants for nuclear and thermonuclear power plants

Study into the physical chemistry and technology of alkali liquid metal coolants for nuclear and thermonuclear power plants

Conceptual issues of the cold filter trap development for the sodium coolant purification in fast-neutron reactors

Physical Chemistry and Technology of Alkaline Liquid-Metal Coolant: A Retrospective-Perspective Look

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Sodium coolant purification systems for a nuclear power station equipped with a BN-1200 reactor

Cited by 8 publications

References 0 publications

﻿Study into the physical chemistry and technology of alkali liquid metal coolants for nuclear and thermonuclear power plants

﻿Study into the physical chemistry and technology of alkali liquid metal coolants for nuclear and thermonuclear power plants

Conceptual issues of the cold filter trap development for the sodium coolant purification in fast-neutron reactors

Physical Chemistry and Technology of Alkaline Liquid-Metal Coolant: A Retrospective-Perspective Look

Contact Info

Product

Resources

About

Study into the physical chemistry and technology of alkali liquid metal coolants for nuclear and thermonuclear power plants

Study into the physical chemistry and technology of alkali liquid metal coolants for nuclear and thermonuclear power plants