CN104167228A

CN104167228A - Cylindrical baffle plate type main container for molten salt reactor

Info

Publication number: CN104167228A
Application number: CN201310192761.7A
Authority: CN
Inventors: 董沛; 谷济源; 董保国
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-15
Filing date: 2013-05-15
Publication date: 2014-11-26
Anticipated expiration: 2033-05-15
Also published as: CN104167228B

Abstract

The invention discloses a cylindrical baffle plate type main container for a molten salt reactor, and belongs to the technical field of molten salt reactors. Through a baffle plate type structure, the problem of the distribution of nuclide density, neutron flux, power density, burnup and the like generated by the flow of molten salt along the axis of the cylindrical main container is mainly solved, and the burnup and the like of molten salt slices differ and vary in an approximately continuous manner along the axis of a cylinder, so that stable nuclear burning waves transmitted along the axis of the cylinder can be formed in a molten salt medium, and high burnup of a material can be transformed. Baffle plates in an active area and close to the active area are replaced by compact plate type heat exchangers, so that the reactor output power and the like can be increased. Walls of the plate type heat exchangers can be taken as walls of the main container, so that the structure of a reactor core can become compact and be simplified. For the reactor core running under a low pressure, a thin-wall baffle plate type and a wall plate type heat exchanger into which the molten salt or a gas coolant is introduced are feasible technically, but the structure of the molten salt reactor becomes more complex. The cylindrical baffle plate type main container is mainly used for meeting the requirement of special performance during normal running of a special molten salt reactor for burning depleted uranium or thorium.

Description

The cylindrical iris type primary tank of MSR

Technical field MSR

The primary tank of background technology MSR is its critical component, inside has molted salt nuclear fuel, molten salt coolant, fused salt fertile material etc.Primary tank can have different shapes and structure.The type of cooling has interior cold-peace cooling type.To realize different functions.

The structure of the elongated cylindrical primary tank of the horizontal positioned of summary of the invention MSR, along cylinder axis lateral arrangement dividing plate, with the way-board of space-number centimetre, fused salt is cut off into the thin slice of cylinder of equal thickness or specific thicknesses, sealing requirements between dividing plate and primary tank inwall is not high, dividing plate can easily move along cylinder axis, to solve the problem that needs moveable partition board when fused salt expands and reloads, and can be easy to change dividing plate according to the needs in irradiation dose or serviceable life, the one or both ends of cylinder can be semisphere or plane, near start end, be provided with and change dividing plate and discharge fused salt spentnuclear fuel mechanism, the other end has charging mechanism.Fused salt is natural circulation cooling in thin slice of cylinder, the nucleic Density Distribution of each fused salt thin slice, neutron flux, power density, burnup etc. are different and along the approximately continuous variation of cylinder axis, also take easily thin slice of cylinder as unit interpolation fused salt virgin material or remove spentnuclear fuel, so just can, in the fused-salt type medium of depleted uranium or thorium, form the active region of the stable nuclear burning ripple of propagating along cylinder axis or the Critical Stability of movement.Can realize high burnup and the high high transmuting of putting fission product of fertile material.In emergency circumstances or when temperature of molten salt surpasses setting value, only need to discharge active region and near fused salt thereof, the fused salt in spentnuclear fuel and virgin material district still can be retained in reactor core, or is discharged in other storage tank, divides section discharge.Further develop, the high temperature resistant compact heat-exchangers of the plate type that can become metal or carbon carbon complex etc. to manufacture active region and near dividing plate Evolution Development thereof, to improve heap output power.Do not need whole dividing plates all to change iris type heat exchanger into.When nuclear fuel is all in primary tank and while using the wall heat transfer of primary tank, its wall can partly or entirely be made heat-exchangers of the plate type, this wall plate-type heat exchanger can be single or multiple lift, interior ventilation body or molten salt coolant, can be for the primary tank of various shapes as spherical, cylindrical etc., also can use together with iris type heat exchanger, the primary tank heat exchange area increasing considerably, is conducive to the more effective derivation of reactor core heat energy.Because reactor core low pressure operation, the thin wall barrier formula heat exchanger of interior logical fused salt or gaseous coolant and wall plate-type heat exchanger are technical should be feasible, but can make the structure of MSR become more complex.

The cylindrical iris type primary containment structure of appended drawings 1 schematic layout pattern.In figure, firing tip is that the spherical other end is plane.The wall of primary tank can be wall plate-type heat exchanger, can be also common wall, referring to accompanying drawing 2.The inner structure layout of accompanying drawing 2 iris type heat exchangers is partly cutd open schematic diagram.Bossing between two plates plays water conservancy diversion and support function, gas body or molten salt coolant in chute.

When embodiment is built special special-purpose MSR, the construction of its primary tank will be according to the structural requirement manufacture of cylindrical iris type primary tank, could meet the requirement of property of the normal operation of special special-purpose MSR.As realize high burnup, long-life etc.

Claims

1. the columniform primary tank with packaged type lateral partitions structure of MSR.

2. with dividing plate, form fused salt thin slice; Along the horizontal formation fused salt thin slice of the cylinder axis direction of horizontal positioned, the nucleic Density Distribution of each thin slice, neutron flux, burnup etc. are different and change along cylinder axis approximate continuity, can realize high burnup.

3. dividing plate can move and can change easily along cylinder axis direction; Sealing requirements between dividing plate and cylindrical inner wall is not high; Block board thickness and interval can be adjusted on demand and change.

4. there is more converting mechanism of dividing plate; Directly extract old dividing plate out and insert new dividing plate.

5. the unit that can take between two dividing plates is as unit interpolation fused salt virgin material and shift out fused salt spentnuclear fuel.

6. there is the mechanism that adds fused salt virgin material and shift out fused salt spentnuclear fuel.

7. the dividing plate of the flake structure such as metal; Way-board can sawtooth etc. shape strengthen to improve bending resistance equal strength.

8. the dividing plate of the internally cooled heat-exchangers of the plate type formula structure such as metal; Logical fused salt or gaseous coolant in it.

9. the wall of the primary tank of heat-exchangers of the plate type formula; This wall plate-type heat exchanger can be single or multiple lift for the part or all of wall of primary tank, and interior ventilation body or molten salt coolant can be for the primary tank of various shapes as spherical, cylindrical etc.; Also can use together with iris type heat exchanger.