CN106531250A - Detecting method and system for integrity of nuclear power station fuel element cladding - Google Patents
Detecting method and system for integrity of nuclear power station fuel element cladding Download PDFInfo
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- CN106531250A CN106531250A CN201611161278.2A CN201611161278A CN106531250A CN 106531250 A CN106531250 A CN 106531250A CN 201611161278 A CN201611161278 A CN 201611161278A CN 106531250 A CN106531250 A CN 106531250A
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- fission gas
- activity concentration
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- radioactive fission
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/02—Devices or arrangements for monitoring coolant or moderator
- G21C17/04—Detecting burst slugs
- G21C17/044—Detectors and metering devices for the detection of fission products
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Measurement Of Radiation (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a detecting method and system for integrity of a nuclear power station fuel element cladding. The detecting system comprises a detecting assembly, a comparing assembly and an alarm assembly, wherein the detecting assembly is used for detecting and outputting activity concentration of inert gas contained in loop coolant; the comparing assembly is used for receiving the output activity concentration obtained through detection, comparing the detected activity concentration with a preset alarm threshold value condition and generating and sending an alarm signal if the alarm threshold value condition is met; the alarm assembly is used for receiving the sent alarm signal and giving an alarm according to the preset alarm mode. The breakage rate of the fuel element cladding can be detected by monitoring the activity concentration of the inert gas contained in the loop coolant, the detecting system is higher in feasibility and sensitivity, and mistake measurement possibly caused by non-fuel element failure can be avoided; one or more alarm threshold values can be set, and the breakage rate limit value of the fuel element cladding concerned during safe operation of a nuclear power plant can be monitored quantitatively.
Description
Technical field
The present invention relates to nuclear power plant instrument control field, more particularly to a kind of detection side of fuel for nuclear power plant cladding integrity
Method and system.
Background technology
Nuclear power station has three road protective barriers, wherein the 1st road barrier is can, it is therefore desirable to in fortune nuclear power
Can integrity of standing is monitored on-line, to guarantee that nuclear power plant being capable of safe operation.
When fuel element is not damaged, the radioactivity in primary Ioops coolant essentially from activation products and corrosion product,
The gamma dose rate level of relative which produces is relatively low；If can is damaged, the fission being included in fuel element is produced
Thing (mainly noble gases) is also will go in primary Ioops coolant, and now the gamma dose rate of primary Ioops coolant will increase.
In prior art, it is cold for controlling primary Ioops with volume control system (abbreviationization appearance system) that nuclear power plant arranges chemistry
But the total amount and component of agent.And radiation monitoring device then being arranged in hold systematic pipeline beside, for monitoring primary Ioops coolant
In radioactivity parameter, for judging Reactor fuel element cladding breakage.For example, by settingization appearance system letdown line
On gamma radiation detector (such as ionization chamber etc.) carrying out real-time detection, by the change for monitoring primary Ioops coolant gamma dose rate
Change the monitoring realized to can integrity.
But there is following defect in above-mentioned prior art：
1) as the gamma dose rate that the reasons such as unfuled part breakage also result in coolant or environment increases, therefore will
Have influence on the reliability of measuring method；
2) existing method can only qualitative monitoring breakage rate, and be unable to the breakage rate of Quantitative Monitoring can.
The content of the invention
For above-mentioned problems of the prior art, the invention provides a kind of fuel for nuclear power plant cladding integrity
Detection method and system, reached by monitoring the activity concentration of noble gases isolated from primary Ioops coolant quantitative
The purpose of monitoring fuel sheath failure rate.
The technical scheme that the present invention is proposed with regard to above-mentioned technical problem is as follows：
On the one hand, there is provided a kind of detection method of fuel for nuclear power plant cladding integrity, comprise the steps：
S1, fuel for nuclear power plant cladding and primary Ioops cooling system are attached；
S2, the primary Ioops coolant in the primary Ioops cooling system is detected by detector, determine described one
The activity concentration of radioactive fission gas in the coolant of loop；
S3, carry out when the activity concentration of the radioactive fission gas for detecting meets default alarm threshold value condition
Report to the police.
Preferably, step S2 includes：
S21, by chemistry with volume control system the primary Ioops coolant is transported to into letdown line, by separate dress
Separated in putting the primary Ioops coolant by the radioactive fission gas from the letdown line；
S22, the activity concentration of isolated radioactive fission gas is detected by the detector, and determined
The activity concentration of isolated radioactive fission gas.
Preferably, the radioactive fission gas are noble gases.
Preferably, the segregation apparatuss are gas and water separator；The detector includes NaI and ionization chamber detector.
Preferably, in step S3, the alarm threshold value is based on the default radioactivity of the can breakage rate
The activity concentration of fission gas；When the activity concentration of the radioactive fission gas for detecting is split more than default the penetrating property
Reported to the police during the activity concentration for becoming gas.
Preferably, the activity concentration based on the default radioactive fission gas of the can breakage rate is extremely
Rare one；When the activity concentration of the radioactive fission gas for detecting exceedes default penetrating property fission gas described in any of which
Activity concentration when, reported to the police using pattern corresponding with the activity concentration of default radioactive fission gas this described.
Preferably, the activity concentration bag based on the default radioactive fission gas of the can breakage rate
Include：
The of corresponding radioactive fission gas when the can breakage rate is default first breakage rate
One activity concentration；
And when the can breakage rate be default second breakage rate when corresponding radioactive fission gas
The second activity concentration；
When the radioactive fission gas activity concentration exceed first activity concentration when, with first activity
The corresponding first mode of concentration is reported to the police；
When the radioactive fission gas activity concentration exceed second activity concentration when, with second activity
The corresponding second mode of concentration is reported to the police.
On the other hand, a kind of detecting system of fuel for nuclear power plant cladding integrity is also provided, including：
Probe assembly, the primary Ioops cooling system that its connection is connected with fuel for nuclear power plant cladding are described for detecting
The activity concentration of the radioactive fission gas contained by the primary Ioops coolant of primary Ioops cooling system is simultaneously exported；
Component is compared, its described probe assembly of connection, for receiving the activity concentration detected described in output, and will inspection
The activity concentration for measuring is compared with default alarm threshold value condition, if meeting alarm threshold value condition, produces warning
Signal simultaneously sends；
And alarm assemblies, its described comparison component of connection, for receiving the alarm signal for sending, according to default warning
Pattern is reported to the police.
Preferably, also include：
Chemistry and volume control system, its described primary Ioops cooling system of connection, for controlling the primary Ioops coolant
Total amount and component, and the primary Ioops coolant is delivered to be connected with volume control system with the chemistry under let out pipe
Line；
And the segregation apparatuss being connected with the letdown line, the segregation apparatuss are for by the radioactive fission gas
Separated in primary Ioops coolant from the letdown line, and by isolated radioactive fission gas be delivered to
The probe assembly of the segregation apparatuss connection.
Preferably, the radioactive fission gas are noble gases.
Preferably, the segregation apparatuss are gas and water separator；The detector includes NaI and ionization chamber detector.
Preferably, the alarm threshold value is based on the default radioactive fission gas of the can breakage rate
Activity concentration；When the activity concentration of the radioactive fission gas for detecting exceedes the work of default the penetrating property fission gas
During degree concentration, the contrast component produces alarm signal and sends.
Preferably, the activity concentration based on the default radioactive fission gas of the can breakage rate is extremely
Rare one；
When the activity concentration of the radioactive fission gas for detecting exceedes default penetrating property fission gas described in any of which
Activity concentration when, the contrast component produces different alarm signals and simultaneously sends；The alarm assemblies are according to receiving not
Same alarm signal, is reported to the police using pattern corresponding with the alarm signal.
Preferably, the activity concentration bag based on the default radioactive fission gas of the can breakage rate
Include：
The of corresponding radioactive fission gas when the can breakage rate is default first breakage rate
One activity concentration；
And when the can breakage rate be default second breakage rate when corresponding radioactive fission gas
The second activity concentration；
When the activity concentration of the radioactive fission gas for detecting exceedes first activity concentration, the contrast
Component produces the first alarm signal and sends；The alarm assemblies according to the first alarm signal for receiving, using with this first
The corresponding first mode of alarm signal is reported to the police；
When the activity concentration of the radioactive fission gas for detecting exceedes second activity concentration, the contrast
Component produces the second alarm signal and sends；The alarm assemblies according to the second alarm signal for receiving, using with this second
The corresponding second mode of alarm signal is reported to the police.
Technical scheme has the following technical effect that：
1) present invention can be by monitoring the activity concentration of the noble gases in primary Ioops coolant come to fuel unit involucrum
Breakage rate detected, its for the method for existing qualitative monitoring breakage rate, with higher feasibility and sensitive
Degree, can avoid caused may measuring by mistake due to unfuled part Breakage Reasons；
2) present invention can set one or more alarm threshold values, be capable of achieving to run npp safety fuel unit of concern
Part clad failure rate limit value carries out Quantitative Monitoring.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to making needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, can be obtaining other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the detection method flow chart of the can integrity in the embodiment of the present invention one；
Fig. 2 is the detecting system structural representation of the can integrity in the embodiment of the present invention one.
Specific embodiment
The present invention is directed to present in prior art can only be by monitoring the change of primary Ioops coolant gamma dose rate come right
Can integrity carries out qualitative monitoring, and is unable to detection by quantitative, and as the reasons such as unfuled part breakage are made
Into mistake measurement defect, there is provided a kind of detection method and system of fuel for nuclear power plant cladding integrity.Its core is thought
Think be：Noble gases result from the nuclear fission process of nuclear fuel inside nuclear power plant reactor, in fission process release nuclear energy and
Noble gases are included in fission product, decay constant, wherein fission product and decay constant.If can produces broken
Damage, then only described noble gases can just discharge can, the present invention is lazy in primary Ioops coolant by monitoring
Property gas is reaching the purpose of Quantitative Monitoring fuel sheath failure rate.
Embodiment one：
Fig. 1 shows the detection method flow chart of nuclear power station can integrity in the present invention, and which specifically includes
Following steps：
S1, fuel for nuclear power plant cladding and primary Ioops cooling system are attached；If can is damaged,
The radioactive fission and decay constant being then included in fuel element is will go in the coolant of the primary Ioops cooling system；
S2, the primary Ioops coolant in the primary Ioops cooling system is detected by detector, determine described one
The activity concentration of radioactive fission gas in the coolant of loop；Noble gases result from the nuclear fission of nuclear fuel inside reactor
Journey, releases nuclear energy and fission product, decay constant, wherein includes indifferent gas in fission product and decay constant in fission process
Body, therefore, the radioactive fission gas in above-mentioned steps S2 are preferably noble gases, and the detector is included but is not limited to
It is NaI and ionization chamber detector, other any noble gas activity activity concentrations that can detect in described primary Ioops coolants
Detection means each fall within protection scope of the present invention；
S3, carry out when the activity concentration of the radioactive fission gas for detecting meets default alarm threshold value condition
Report to the police.
Preferably, specifically include in step S2：
S21, by chemistry with volume control system the primary Ioops coolant is transported to into letdown line, by separate dress
Separated in putting the primary Ioops coolant by the radioactive fission gas from the letdown line；
S22, the activity concentration of isolated radioactive fission gas is detected by the detector, and determined
The activity concentration of isolated radioactive fission gas.
In the present embodiment, the segregation apparatuss are gas and water separator, existing by indifferent gas by above-mentioned gas and water separator
Body is separated from the primary Ioops coolant, is then detected again, can avoid being produced by other in addition to noble gases
The activity concentration error brought by the radioactive material of life, thus greatly improves feasibility and the sensitivity of detection, can keep away
Exempt from caused to measure by mistake due to unfuled part Breakage Reasons.
Further, in step S3, the alarm threshold value is based on the default radiation of the can breakage rate
The activity concentration of property fission gas；When the activity concentration of the radioactive fission gas for detecting exceedes default the penetrating property
Reported to the police during the activity concentration of fission gas；
The activity concentration at least one based on the default radioactive fission gas of the can breakage rate
It is individual；When the activity concentration of the radioactive fission gas for detecting exceedes the activity of default penetrating property fission gas described in any of which
During concentration, reported to the police using pattern corresponding with the activity concentration of default radioactive fission gas this described.
Specifically, the activity concentration bag based on the default radioactive fission gas of the can breakage rate
Include：
The of corresponding radioactive fission gas when the can breakage rate is default first breakage rate
One activity concentration；Preferably, when first breakage rate is 0.25%, corresponding first activity concentration is b1=1E10Bq/m3；
And when the can breakage rate is default second breakage rate corresponding radioactive fission gas
Second activity concentration；Preferably, when second breakage rate is, corresponding second activity concentration is b2=1E11Bq/m3；
When the radioactive fission gas activity concentration exceed first activity concentration when, with first activity
The corresponding first mode of concentration is reported to the police；The type of alarm can be sound and light alarm mode, such as using yellow display lamp or
The continuous sound of person is reported to the police；
When the radioactive fission gas activity concentration exceed second activity concentration when, with second activity
The corresponding second mode of concentration is reported to the police；Likewise, the type of alarm can be sound and light alarm mode, such as using red finger
Show that lamp or the sound of interruption are reported to the police.
Thus, Nuclear Power Plant Operators can judge fuel according to different type of alarms after fuel sheath failure is found
The damaged degree of cladding element, thus will take different nuclear power plant's operation reserves, to reduce release and the biography of radioactive substance
Broadcast.
Embodiment two：
Fig. 1 shows the detection method system structure diagram of nuclear power station can integrity in the present invention, its
Specifically include：
Probe assembly 6, the primary Ioops cooling system 2 that its connection is connected with fuel for nuclear power plant cladding 1, for detecting
State the activity concentration of contained radioactive fission gas in the primary Ioops coolant of primary Ioops cooling system 2 and export；
Component 7 is compared, its described probe assembly 6 of connection, for receiving the activity concentration detected described in output, and will
The activity concentration for detecting is compared with default alarm threshold value condition, if meeting alarm threshold value condition, produces report
Alert signal simultaneously sends；
And alarm assemblies 8, its connection comparison component 7, for receiving the alarm signal for sending, according to default report
Alert pattern is reported to the police.
Preferably, also include in 6 upstream of the probe assembly：
Chemistry and volume control system 3, its described primary Ioops cooling system 2 of connection, for controlling the primary Ioops cooling
The total amount and component of agent, and the primary Ioops coolant is delivered to be connected with volume control system 2 with the chemistry under let out
Pipeline 4；
And the segregation apparatuss 5 being connected with the letdown line 4, the segregation apparatuss 5 are for by the radioactive fission
Gas is separated in the primary Ioops coolant from the letdown line 4, and will be isolated radioactive fission gas defeated
Deliver to the probe assembly 6 being connected with the segregation apparatuss 5.
Additionally, the setting of alarm threshold value described in the present embodiment, the generation of alarm signal and type of alarm with enforcement
Example one is identical, will not be described here.
It should be noted that the detection method and system in the present invention can operate with PWR of Nuclear Power Station fuel element bag
The detection of shell integrity.
In sum, the present invention can be by monitoring the activity concentration of the noble gases in primary Ioops coolant come to nuclear power station
Fuel unit involucrum breakage rate detected, its relative to it is existing it is qualitative monitoring breakage rate method for, with higher
Feasibility and sensitivity, can avoid caused may measuring by mistake due to unfuled part Breakage Reasons；And can set 1 or
Multiple alarm threshold values, are capable of achieving quantitatively to supervise npp safety operation can breakage rate limit value of concern
Survey.
One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware
To complete, it is also possible to instruct the hardware of correlation to complete by program, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read only memory, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (14)
1. a kind of detection method of fuel for nuclear power plant cladding integrity, it is characterised in that
Comprise the steps：
S1, fuel for nuclear power plant cladding and primary Ioops cooling system are attached；
S2, the primary Ioops coolant in the primary Ioops cooling system is detected by detector, determine the primary Ioops
The activity concentration of radioactive fission gas in coolant；
S3, reported when the activity concentration of the radioactive fission gas for detecting meets default alarm threshold value condition
It is alert.
2. the system as claimed in claim 1, it is characterised in that step S2 includes：
S21, by chemistry with volume control system the primary Ioops coolant is transported to into letdown line, by segregation apparatuss will
The radioactive fission gas are separated in the primary Ioops coolant from the letdown line；
S22, the activity concentration of isolated radioactive fission gas is detected by the detector, and determine separation
The activity concentration of the radioactive fission gas for obtaining.
3. method as claimed in claim 2, it is characterised in that the radioactive fission gas are noble gases.
4. method as claimed in claim 2, it is characterised in that the segregation apparatuss are gas and water separator；The detector
Including NaI and ionization chamber detector.
5. the method for claim 1, it is characterised in that in step S3, the alarm threshold value are based on fuel unit
The activity concentration of the default radioactive fission gas of part clad failure rate；When the activity of the radioactive fission gas for detecting
Concentration is reported to the police when exceeding the activity concentration of default the penetrating property fission gas.
6. method as claimed in claim 5, it is characterised in that described to put based on the can breakage rate is default
The activity concentration of penetrating property fission gas at least one；Wherein appoint when the activity concentration of the radioactive fission gas for detecting exceedes
Described in one during the activity concentration of default penetrating property fission gas, using dense with the activity of default radioactive fission gas this described
Spend corresponding pattern to be reported to the police.
7. method as claimed in claim 6, it is characterised in that described to put based on the can breakage rate is default
The activity concentration of penetrating property fission gas includes：
The first work of corresponding radioactive fission gas when the can breakage rate is default first breakage rate
Degree concentration；
And when the can breakage rate is default second breakage rate corresponding radioactive fission gas
Two activity concentrations；
When the radioactive fission gas activity concentration exceed first activity concentration when, with first activity concentration
Corresponding first mode is reported to the police；
When the radioactive fission gas activity concentration exceed second activity concentration when, with second activity concentration
Corresponding second mode is reported to the police.
8. a kind of detecting system of fuel for nuclear power plant cladding integrity, it is characterised in that include：
Probe assembly, the primary Ioops cooling system that its connection is connected with fuel for nuclear power plant cladding, for detecting described a time
The activity concentration of the radioactive fission gas contained by the primary Ioops coolant of line cooling system is simultaneously exported；
Component is compared, its described probe assembly of connection for receiving the activity concentration detected described in output, and will be detected
The activity concentration compare with default alarm threshold value condition, if meeting alarm threshold value condition, produce alarm signal
And send；
And alarm assemblies, its described comparison component of connection, for receiving the alarm signal for sending, according to default alarm mode
Reported to the police.
9. system as claimed in claim 8, it is characterised in that also include：
Chemistry and volume control system, its described primary Ioops cooling system of connection, for controlling the total of the primary Ioops coolant
Amount and component, and the primary Ioops coolant is delivered to the letdown line being connected with volume control system with the chemistry；
And the segregation apparatuss being connected with the letdown line, the segregation apparatuss for by the radioactive fission gas from institute
Separated in stating the primary Ioops coolant in letdown line, and by isolated radioactive fission gas be delivered to it is described
The probe assembly of segregation apparatuss connection.
10. system as claimed in claim 9, it is characterised in that the radioactive fission gas are noble gases.
11. systems as claimed in claim 9, it is characterised in that the segregation apparatuss are gas and water separator；The detector
Including NaI and ionization chamber detector.
12. systems as claimed in claim 8, it is characterised in that the alarm threshold value is broken based on the can
The activity concentration of the default radioactive fission gas of loss rate；When the activity concentration of the radioactive fission gas for detecting exceedes
During the activity concentration of default the penetrating property fission gas, the contrast component produces alarm signal and sends.
13. systems as claimed in claim 12, it is characterised in that described default based on the can breakage rate
The activity concentration of radioactive fission gas at least one；
When the activity concentration of the radioactive fission gas for detecting exceedes the work of default penetrating property fission gas described in any of which
During degree concentration, the contrast component produces different alarm signals and sends；The alarm assemblies are different according to what is received
Alarm signal, is reported to the police using pattern corresponding with the alarm signal.
14. systems as claimed in claim 13, it is characterised in that described default based on the can breakage rate
The activity concentration of radioactive fission gas includes：
The first work of corresponding radioactive fission gas when the can breakage rate is default first breakage rate
Degree concentration；
And when the can breakage rate is default second breakage rate corresponding radioactive fission gas
Two activity concentrations；
When the activity concentration of the radioactive fission gas for detecting exceedes first activity concentration, the contrast component
Produce the first alarm signal and send；The alarm assemblies are adopted and first warning according to the first alarm signal for receiving
The corresponding first mode of signal is reported to the police；
When the activity concentration of the radioactive fission gas for detecting exceedes second activity concentration, the contrast component
Produce the second alarm signal and send；The alarm assemblies are adopted and second warning according to the second alarm signal for receiving
The corresponding second mode of signal is reported to the police.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611161278.2A CN106531250A (en) | 2016-12-15 | 2016-12-15 | Detecting method and system for integrity of nuclear power station fuel element cladding |
| PCT/CN2017/116334 WO2018108138A1 (en) | 2016-12-15 | 2017-12-15 | Method and system for detecting integrity of fuel element cladding of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611161278.2A CN106531250A (en) | 2016-12-15 | 2016-12-15 | Detecting method and system for integrity of nuclear power station fuel element cladding |
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| WO (1) | WO2018108138A1 (en) |
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| CN107102350A (en) * | 2017-05-03 | 2017-08-29 | 中国核动力研究设计院 | A kind of radioactivity inert gas monitor calibration method and system |
| CN108182980A (en) * | 2017-11-27 | 2018-06-19 | 中核控制系统工程有限公司 | It is a kind of to sob the air-channel system for inhaling detection device online suitable for fuel can |
| WO2018108138A1 (en) * | 2016-12-15 | 2018-06-21 | 中广核工程有限公司 | Method and system for detecting integrity of fuel element cladding of nuclear power station |
| CN108389637A (en) * | 2018-02-07 | 2018-08-10 | 中广核研究院有限公司 | A kind of lead bismuth heap fuel element cladding integrality on-line monitoring system and method |
| CN109003688A (en) * | 2018-07-03 | 2018-12-14 | 中广核工程有限公司 | A kind of PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION coolant activity activity monitoring method and system |
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| CN110729062A (en) * | 2019-09-30 | 2020-01-24 | 阳江核电有限公司 | Fuel assembly cladding integrity analysis and prediction method, system and storage medium |
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| CN112735613A (en) * | 2019-10-28 | 2021-04-30 | 中核核电运行管理有限公司 | Tracking and monitoring method for integrity of domestic nuclear fuel assembly |
| CN113571213A (en) * | 2021-06-23 | 2021-10-29 | 中国原子能科学研究院 | Method for detecting integrity of neptunium target in irradiation process |
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