CN106908826A - HTO content measurement device and method - Google Patents
HTO content measurement device and method Download PDFInfo
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- CN106908826A CN106908826A CN201710127217.2A CN201710127217A CN106908826A CN 106908826 A CN106908826 A CN 106908826A CN 201710127217 A CN201710127217 A CN 201710127217A CN 106908826 A CN106908826 A CN 106908826A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/02—Dosimeters
- G01T1/12—Calorimetric dosimeters
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Abstract
The present invention relates to content of radioactive substance field of measuring technique, aim to solve the problem that the low problem of tritium level measurement big, certainty of measurement affected by environment in the prior art, a kind of HTO content measurement device is provided, the measurement apparatus include the structure of controlling temperature with cavity, the hot lazy body with cavity volume is provided with cavity, core measuring unit is provided with cavity volume.Core measuring unit is included for accommodating the sample room containing tritium sample and the control room for accommodating tester.Core measuring unit also includes measuring circuit, and measuring circuit includes being electrically connected to each other by some temperature-sensitive elements being respectively arranged on sample room and control room the external circuitses part of the thermoelectric unit and connection thermoelectric unit for being formed.Being additionally provided with sample room can adjust the check thermal source of its heating power.The present invention also provides a kind of tritium-containing amount measuring method based on above-mentioned measurement apparatus.It is low the beneficial effects of the invention are as follows tritium level measurement big, certainty of measurement affected by environment.
Description
Technical field
The present invention relates to content of radioactive substance field of measuring technique, in particular to a kind of HTO content measurement dress
Put and method.The invention further relates to a kind of HTO content measuring method.
Background technology
Tritium is one of isotope of hydrogen, with radioactivity.Tritium be caused serious injury into meeting after human body to human organ.
The measurement of tritium level be tritium processing procedure in an indispensable link.
But the precision that draws of HTO content measuring method of the prior art is low and measurement result is unstable.
The content of the invention
The present invention is intended to provide a kind of HTO content measurement device, to solve HTO content measurement device of the prior art
The low problem of certainty of measurement.
Another object of the present invention is to provide a kind of HTO content measuring method, to solve tritium level of the prior art
The low problem of certainty of measurement.
What embodiments of the invention were realized in：
A kind of HTO content measurement device, the measurement apparatus include the structure of controlling temperature with cavity, and being provided with cavity has
The hot lazy body of cavity volume, is provided with core measuring unit in cavity volume.Core measuring unit is included for accommodating the sample room containing tritium sample
With the control room for accommodating tester.Core measuring unit also includes measuring circuit, and measuring circuit is included by being respectively arranged at
Some temperature-sensitive elements on sample room and control room are electrically connected to each other the thermoelectric unit to be formed, and are electrically connected simultaneously with thermoelectric unit
External circuitses part for measuring thermoelectric unit both end voltage value.Being additionally provided with the sample room can adjust its heating power
Check thermal source.
Further：
Temperature-sensitive element is Peltier, and the temperature-sensitive element being arranged on sample room compares on room temperature-sensitive element and connects with being arranged at
Form thermoelectric unit.
Further：
Sample room and control room are constituted by aluminium, and its inner surface is provided with gold plate.
Further：
Sample room and control room are vacantly hung in hot lazy body by the first suspension rod and the second suspension rod respectively.
Further：
Structure of controlling temperature includes temperature control box and the vacuum tank with cavity being arranged in temperature control box.
Further：
Vacuum tank is by the first supports support in the bottom surface in temperature control box.
The lazy body of heat is arranged in vacuum tank.
Further：
This measurement apparatus also includes Vacuuming structure.
Vacuuming structure includes molecular pump and oil-sealed vacuum pump.
Molecular pump connects vacuum tank, oil-sealed vacuum pump connection molecule pump.Vacuuming structure also includes connection vacuum tank and use
In the vacuum meter of the vacuum of measurement vacuum tank.
Further：
Checking thermal source includes the adding thermal resistance being arranged in sample room and is electrically connected with adding thermal resistance and can control heating
The heater circuit that resistance generates heat by the heating power of setting.
Further：
The lazy body of heat is by the second supports support in the bottom surface of cavity.
A kind of HTO content measuring method, the measuring method is based on above-mentioned HTO content measurement device.The measuring method bag
Include following steps：
Temperature setting step：Start structure of controlling temperature, and set and keep structure of controlling temperature internal temperature constant；
Check step：A series of heat release performance number W of different sizes are taken, the big of the heat release power of thermal source is checked in regulation successively
It is small equal to above-mentioned heat release power, and record the magnitude of voltage U at the thermoelectric unit two ends that measuring circuit measurement is obtained；Then thermoelectricity is drawn
The magnitude of voltage U at unit two ends with heat release changed power curve U-W；
The tritium heat release power of sample containing tritium asks for step：To adding quantitative sample containing tritium in sample room, in control room plus
Enter the tester of equivalent；Magnitude of voltage U2 during the voltage value stabilization at the thermoelectric unit two ends shown in record measuring circuit, and in school
The value W2 of the corresponding heat release power of magnitude of voltage U2 is found out in the U-W curves obtained in core step；
Tritium level calculation procedure：The result of step is asked for according to the tritium heat release power of sample containing tritium, is counted by formula m=W2/K
Calculate the content of tritium in sample containing tritium；In formula：M is the content of tritium in sample, and K is the heat release performance number of the tritium of unit quality.
In sum, in the cavity that the HTO content measurement device in the present embodiment is measured by structure of controlling temperature precise control
Temperature so that hot lazy body therein can keep stationary temperature, in sample room add the heat release of sample emission containing tritium with temperature
The thermal field of stable and uniform is formed between the constant hot lazy body of degree, the thermal field between control group and hot lazy body is equivalent to sample room and warm
Measured value between lazy body in the non-heat release of sample containing tritium, by with some on sample room and control room by being respectively arranged at
Temperature-sensitive element is electrically connected to each other the measuring circuit to form thermoelectric unit, can eliminate the influence of other disturbing factors, measure merely due to
The influence that sample exotherms containing tritium bring, can accurately draw the power of the heat release containing tritium sample, and then obtain accurate tritium level.
In addition before the heat release power of actual measurement of tritium sample, the voltage-power curve of thermoelectric unit is carried out by checking thermal source
Check, then the magnitude of voltage reverse at thermoelectric unit two ends goes out the heat release power of tritium sample in the thermal field formed by measurement of tritium sample,
With the beneficial effect for measuring result high precision.
HTO content measuring method in the present embodiment is same to have measurement essence because based on above-mentioned HTO content measurement device
Degree beneficial effect high.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, thus be not construed as it is right
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the structural representation of the HTO content measurement device in the present embodiment；
Fig. 2 is the structural representation of the structure of controlling temperature in Fig. 1；
Fig. 3 is the structural representation of the hot lazy body in Fig. 1；
Fig. 4 is the structural representation of the core measuring unit in Fig. 1；
Fig. 5 is the flow chart of the HTO content measuring method in the embodiment of the present invention two；
Fig. 6 is the magnitude of voltage U at the thermoelectric unit two ends in the embodiment of the present invention two with the curve map of heat release changed power.
Icon：010- measurement apparatus；100- structure of controlling temperature；101- cavitys；110- temperature control boxs；120- vacuum tanks；130-
One support member；140- Vacuuming structures；141- molecular pumps；142- oil-sealed vacuum pumps；143- vacuum meters；The lazy body of 200- heat；201-
Cavity volume；The support members of 210- second；300- core measuring units；310- sample rooms；311- gold plates；320- compares room；330- is surveyed
Amount circuit；340- thermoelectric units；341- temperature-sensitive elements；350- external circuitses part；The suspension rods of 360- first；The suspension rods of 370- second；
380- checks thermal source；381- adding thermal resistances；382- heater circuits；383- vacuum electrodes.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Present invention implementation generally described and illustrated in accompanying drawing herein
The component of example can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it need not be further defined and explained in subsequent accompanying drawing.
In the description of the invention, it is necessary to explanation, if occur term " " center ", " on ", D score, "left", "right",
The orientation or position relationship of the instruction such as " vertical ", " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship,
Or the orientation usually put when using of the invention product or position relationship, it is for only for ease of the description present invention and simplification is retouched
State, rather than indicate imply signified device or element must have specific orientation, with specific azimuth configuration and operation,
Therefore it is not considered as limiting the invention.If additionally, occur term " first ", " second " etc. in description of the invention only using
Described in distinguishing, and it is not intended that indicating or implying relative importance.
If additionally, occur the term such as term " level ", " vertical " in description of the invention to be not offered as requiring that part is absolute
Level or pendency, and can be to be slightly tilted.If " level " refers to only its direction with respect to more level for " vertical ", not
It is to represent that the structure must be fully horizontal, and can be to be slightly tilted.
In the description of the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, if there is term
" setting ", " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or detachably connecting
Connect, or be integrally connected；Can mechanically connect, or electrically connect；Can be joined directly together, it is also possible to by middle matchmaker
Jie is indirectly connected to, and can be two connections of element internal.For the ordinary skill in the art, can be with concrete condition
Understand above-mentioned term concrete meaning in the present invention.
Embodiment one
Fig. 1 is the structural representation of the HTO content measurement device 010 in the present embodiment.Fig. 1 is refer to, the present embodiment is carried
For a kind of HTO content measurement device 010, the measurement apparatus 010 include the structure of controlling temperature 100 with cavity 101, in cavity 101
The hot lazy body 200 with cavity volume 201 is provided with, core measuring unit 300 is provided with cavity volume 201.
Fig. 2 is the structural representation of the structure of controlling temperature 100 in Fig. 1.Fig. 2 is refer to, the structure of controlling temperature 100 in the present embodiment
Including temperature control box 110 and the vacuum tank 120 being arranged in temperature control box 110.Vacuum tank 120 is supported in by the first support member 130
Bottom surface in temperature control box 110.Vacuum tank 120 is communicated with Vacuuming structure 140.Vacuuming structure 140 includes being used for what is vacuumized
Molecular pump 141 and oil-sealed vacuum pump 142, and for the vacuum meter 143 of measurement of vacuum.Molecular pump 141 connects vacuum tank
120, the connection molecule pump 141 of oil-sealed vacuum pump 142.Vacuum meter 143 connects vacuum tank 120, the vacuum for measuring vacuum tank 120
Degree.Above-mentioned hot lazy body 200 is arranged in vacuum tank 120.
The acting as of temperature control box 110 ensures that internal temperature is constant, will not be because of the temperature of external environment when making Tritium measurement
Change and introduce internal measuring error, the present embodiment can reach more than 0.1 DEG C of temperature control box 110 preferably by temperature-controlled precision.
Vacuum tank 120 can be made using L stainless steels, and be arranged to the casing of upper end open and covered the case lid of casing
The structure being tightly connected by bolt and sealing ring.
Vacuum tank 120 is connected with the molecular pump 141 and oil-sealed vacuum pump 142 in the external world and is vacuumized, and uses vacuum meter 143
Survey vacuum is carried out, the purpose is to further reduce the internal heat exchange with the external world.In embodiment, preferably by vacuum tank 120
Vacuum be set to not higher than 100Pa.
First support member 130 is made preferably by the good material of heat-proof quality, such as plastics, to reduce inside and outside heat
Exchange, it is to avoid the accuracy and precision of influence measurement result.
Fig. 3 is the structural representation of the hot lazy body 200 in Fig. 1.Fig. 3 is referred to, the hot lazy body 200 in the present embodiment can be with
It is using the consistent shell-like structure of the wall thickness everywhere of making of pure aluminum.It is cavity volume 201 in it.Preferably, its wall thickness can be set
Into 30-50mm.Fine aluminium has good heat conductivility, therefore, when certain of hot lazy body 200 is heated, its heat for receiving
Amount rapidly will conduct on hot lazy body 200 so that heat is uniformly distributed thereon, and wall thickness is consistent everywhere for hot lazy body 200 in addition,
Temperature on its wall everywhere can remain dynamic stability, can make the uniform stabilization of the thermal field produced by it, be conducive to temperature
Certainty of measurement is improved when control and follow-up measurement.The wall thickness of the lazy body 200 of heat sets thicker, to ensure that the heat that internal tritium is radiated dissipates
The hot temperature change of lazy body 200 after being absorbed by hot lazy body 200 is issued substantially zeroed, to be further able to ensure thermoelectric unit below
340 measurement is accurate.In fact, because every gram of power of tritium is 0.324W, heat release is few, and generally the tritium of measurement is milligram
Level, influence of its thermal discharge to the hot temperature of lazy body 200 is negligible.The lazy body 200 of heat is provided with and picks out hole, convenient to set in the inner
Structure, the wire of circuit etc. pick out.After structure, wire for needing to connect etc. sets, hole can be picked out to this and be thermally shielded
Treatment, such as blocks this and picks out hole using the good closure glue of heat-proof quality, influences to survey to ensure that heat will not pick out hole and shed from this
Measure the accuracy of result.The lazy body 200 of heat is made up of the cupule of upper end open with the covering part for covering the cupule.Covering part and
Cupule is detachably coordinated using countersunk head mode, and coordinates seam crossing glued using the good sealing of heat conduction at both, it is ensured that
The transmission of heat between the two and form isothermal body on the wall of hot lazy body 200.The connect setting into being detachably connected mode, with
Just it is put into and taking-up by sample room 310 or with control room 320.Please refer to Fig. 1, hot lazy body 200 passes through the second support member
210 inside bottom surfaces for being supported in vacuum tank 120.Second support member 210 is made preferably by heat-barrier material, to reduce hot biography
Pass, it is ensured that certainty of measurement.
In other embodiments, the shape of hot lazy body 200 can be for spherical shell, cuboid housing and other are any
The structure of closing or base closed with cavity volume 201.The material for constituting the hot lazy body 200 in the present embodiment also can be used aluminium to close
The metal materials such as gold, titanium alloy, fine copper even other any nonmetallic materials with Thermal conductivity.
Fig. 4 is the structural representation of the core measuring unit 300 in Fig. 1.Fig. 4 is referred to, the core in the present embodiment is surveyed
Amount unit 300 is included for accommodating the sample room 310 containing tritium sample and the control room 320 for accommodating tester, also including surveying
Amount circuit 330 and check thermal source 380.
Sample room 310 is made up of aluminum, and its inner surface is provided with gold plate 311.Due to the measurement apparatus in the present embodiment
010 when in use, and the sample containing tritium in sample room 310 when to external radiation, receive by the inwall of the sample room 310 being mainly made up of aluminium
Radiation may be oxidized and carry out heat release.The partial heat will contaminated samples radiation thermal field, influence measurement result it is accurate
Property.And the stable performance of gold, oxidation heat liberation or other heat absorptions will not occur when being radiated under the protection of gold plate 311 or put
Heat situation, it is ensured that measurement it is accurate.The structure for compareing room 320 is identical with sample room 310, as control group, eliminates and removes sample
Factor influence outside product radiation, corrects checking measurements result, improves the precision of measurement result.Please refer to Fig. 1, sample room
310 are vacantly hung in hot lazy body 200 by the first suspension rod 360 and the second suspension rod 370 respectively with control room 320.
Wherein, measuring circuit 330 includes some temperature-sensitive elements by being respectively arranged on sample room 310 and control room 320
341 are electrically connected to each other the thermoelectric unit 340 to be formed, and the external circuitses part 350 electrically connected with thermoelectric unit 340.Temperature-sensitive
Element 341 is Peltier.The temperature-sensitive element 341 being arranged on sample room 310 compares temperature-sensitive element 341 on room 320 with being arranged at
Series connection forms above-mentioned thermoelectric unit 340.Incorporated by reference to referring to Fig. 1, for connecting the thermal element on sample room 310 and control room 320
The wire of part 341 can be passed by the hole being arranged on hot lazy body 200, vacuum tank 120 and temperature control box 110, be set in wire
After good, the hole can be blocked using heat-barrier material.External circuitses part 350 is located at outside structure of controlling temperature 100, and it can be by setting
Through hole on structure of controlling temperature 100 connects the thermoelectric unit 340 in it.Temperature-sensitive element 341 uses Peltier, the element and thermoelectricity
Even operation principle is consistent, temperature difference directly can be converted into voltage.Measurement apparatus 010 can be connected using multipair temperature-sensitive element 341
Form composition thermoelectric unit 340, such as more than 200 to (for expression is clear, merely illustrated in the accompanying drawing of the present embodiment quantity compared with
Few Peltier), for measuring sample containing tritium in the discharged power that decays.External circuitses part 350 may also include and thermoelectricity
The dc amplifier (not shown) of the electrical connection of unit 340, dc amplifier can be carried out to the output voltage of thermoelectric unit 340
Amplify, to improve the precision of sensitivity and the measurement of measuring circuit 330.After tested, in this programme thermoelectric unit 340 sensitivity
It is 52mV/K, resolution ratio is 0.1mV, measurable minimum temperature difference is 2 × 10-6K, the precision of measurement structure is high, meets work
Industry needs.
Checking thermal source 380 includes the adding thermal resistance 381 that is arranged in sample room 310 and is electrically connected with adding thermal resistance 381
Heater circuit 382, heater circuit 382 may be disposed at outside structure of controlling temperature 100.Check thermal source 380 in the present embodiment also includes
Two vacuum electrodes 383 through sample room 310, the two ends of adding thermal resistance 381 are connected to two vacuum electrodes 383 and are located at
Connection end in sample room 310, the two ends of heater circuit 382 connect two vacuum electrodes 383 and are exposed at outside sample room 310 respectively
Connection end so that constitute as check thermal source 380 circuit.
Measurement apparatus 010 in the present embodiment when in use, can first pass through check thermal source 380 to the two ends of thermoelectric unit 340
The change curve that radiates of thermal power for being subject to it of voltage, the thermoelectric unit caused when then by measurement of tritium sample emission
The magnitude of voltage at 340 two ends, then the corresponding heat radiation power of the magnitude of voltage is drawn in above-mentioned change curve, it is designated as the heat of tritium sample
Radiant power.Finally sample can be calculated by the heat release power of the tritium of the heat radiation power/unit mass of formula tritium-containing amount=tritium
The content of middle tritium.
In sum, the measurement apparatus 010 in the present embodiment at least have the advantages that：
1) sample room 310 in the present embodiment with compare room 320 by the way of aluminium is gold-plated, neither influence HTO thermal power
To the transmission of outside thermoelectric unit 340, decrease the error caused by aluminium parts surface oxidation heat release, sample room 310 with it is right
Set by the way of suspension according to room 320, reduce the tritium heat release lost by heat transfer, increased certainty of measurement；
2) thermoelectric unit 340 being in series using temperature-sensitive element 341 compare traditional thermocouple have it is higher sensitive
Degree and resolution ratio, more preferably measurement temperature can change, and directly can export in the form of voltage.Thermoelectricity in this measurement apparatus 010
The sensitivity of unit 340 and high resolution, measurable temperature difference precision are low, therefore the low sample containing tritium of measurable concentration
3) structure of controlling temperature 100 in the present embodiment is by the precise control of temperature of temperature control box 110, then is completely cut off with vacuum tank 120
Ambient temperature effect, enabling to the thermal field of inside only to receive sample exotherms containing tritium influences, so as to avoid environmental disturbances factor to surveying
Measure the influence of result, it is ensured that the precision of measurement.
Embodiment two
The present embodiment provides a kind of HTO content measuring method, and the measuring method is based on the HTO described in embodiment one
Content measurement device 010.Fig. 5 is refer to, the measuring method is comprised the following steps：
Temperature setting step：Start structure of controlling temperature 100, and set and keep the internal temperature of structure of controlling temperature 100 constant；
Check step：A series of heat release performance number W of different sizes are taken, the heat release power of thermal source 380 is checked in regulation successively
Size be equal to above-mentioned heat release power, and record measuring circuit 330 and measure the magnitude of voltage U at the two ends of thermoelectric unit 340 for obtaining；So
The magnitude of voltage U at the two ends of thermoelectric unit 340 is drawn afterwards with the curve U-W of heat release changed power, and the curve map refers to Fig. 6；
The tritium heat release power of sample containing tritium asks for step：To quantitative sample containing tritium is added in sample room 310, to control room
The tester of equivalent is added in 320；Electricity during the voltage value stabilization at the two ends of thermoelectric unit 340 shown in record measuring circuit 330
Pressure value U2, and the value W2 of the corresponding heat release power of magnitude of voltage U2 is found out in the U-W curves obtained in checking step；
Tritium level calculation procedure：The result of step is asked for according to the tritium heat release power of sample containing tritium, is counted by formula m=W2/K
Calculate the content of tritium in sample containing tritium；In formula：M is the content of tritium in sample, and K is the heat release performance number of the tritium of unit quality.
The HTO of sample containing tritium content measuring method in the present embodiment is based on HTO content measurement device in embodiment one
010, therefore also there is certainty of measurement beneficial effect high.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of HTO content measurement device, it is characterised in that：
The measurement apparatus include the structure of controlling temperature with cavity, and the hot lazy body with cavity volume, the appearance are provided with the cavity
Core measuring unit is provided with chamber；
The core measuring unit is included for accommodating the sample room containing tritium sample and the control room for accommodating tester；
The core measuring unit also includes measuring circuit, and the measuring circuit is included by being respectively arranged at the sample room and institute
The some temperature-sensitive elements stated on control room are electrically connected to each other the thermoelectric unit to be formed, and are electrically connected with the thermoelectric unit and be used in combination
In the external circuitses part for measuring the thermoelectric unit both end voltage value；
Being additionally provided with the sample room can adjust the check thermal source of its heating power.
2. HTO content measurement device according to claim 1, it is characterised in that：
The temperature-sensitive element be Peltier, the temperature-sensitive element being arranged on the sample room be arranged at described control on room
The temperature-sensitive element connects to form the thermoelectric unit.
3. HTO content measurement device according to claim 1, it is characterised in that：
The sample room and the control room are constituted by aluminium, and its inner surface is provided with gold plate.
4. HTO content measurement device according to claim 1, it is characterised in that：
The sample room and the control room are vacantly hung in the hot lazy body by the first suspension rod and the second suspension rod respectively.
5. the HTO content measurement device according to claim any one of 1-4, it is characterised in that：
The structure of controlling temperature includes temperature control box and the vacuum tank with the cavity being arranged in the temperature control box.
6. HTO content measurement device according to claim 5, it is characterised in that：
By the first supports support in the bottom surface in the temperature control box, the hot lazy body is arranged at the vacuum to the vacuum tank
In case.
7. HTO content measurement device according to claim 5, it is characterised in that：
The measurement apparatus also include Vacuuming structure, and the Vacuuming structure includes molecular pump and oil-sealed vacuum pump；Described point
Sub- pump connects the vacuum tank, and the oil-sealed vacuum pump connects the molecular pump；
The Vacuuming structure also includes the connection vacuum tank and the vacuum meter for measuring the vacuum of the vacuum tank.
8. the HTO content measurement device according to claim any one of 1-4, it is characterised in that：
The thermal source of checking includes the adding thermal resistance that is arranged in the sample room and is electrically connected with the adding thermal resistance and can
The heater circuit for controlling the adding thermal resistance to be generated heat by the heating power of setting.
9. HTO content measurement device according to claim 1, it is characterised in that：
The hot lazy body is by the second supports support in the bottom surface of the cavity.
10. a kind of HTO content measuring method, it is characterised in that：
The measuring method is based on the HTO content measurement device as described in claim any one of 1-9, the measuring method bag
Include following steps：
Temperature setting step：Start the structure of controlling temperature, and set and keep structure of controlling temperature internal temperature constant；
Check step：A series of heat release performance number W of different sizes are taken, the big of the heat release power for checking thermal source is adjusted successively
It is small equal to above-mentioned heat release power, and record the magnitude of voltage U at the thermoelectric unit two ends that the measuring circuit measurement is obtained；Then
The magnitude of voltage U at the thermoelectric unit two ends is drawn with the curve U-W of heat release changed power；
The tritium heat release power of sample containing tritium asks for step：To quantitative sample containing tritium is added in the sample room, to the control room
The tester of middle addition equivalent；Record the voltage during voltage value stabilization at thermoelectric unit two ends shown in the measuring circuit
The value W2 of the corresponding heat release power of magnitude of voltage U2 is found out in value U2, and the U-W curves obtained in the check step；
Tritium level calculation procedure：The result of step is asked for according to the tritium of sample containing the tritium heat release power, is counted by formula m=W2/K
Calculate the content of tritium in sample containing tritium；In formula：M is the content of tritium in sample, and K is the heat release performance number of the tritium of unit quality.
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