CN110972405B - Method and device for preventing silver ion electromigration of nuclear-grade circuit board of nuclear power plant - Google Patents
Method and device for preventing silver ion electromigration of nuclear-grade circuit board of nuclear power plant Download PDFInfo
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- CN110972405B CN110972405B CN201911198195.4A CN201911198195A CN110972405B CN 110972405 B CN110972405 B CN 110972405B CN 201911198195 A CN201911198195 A CN 201911198195A CN 110972405 B CN110972405 B CN 110972405B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/225—Correcting or repairing of printed circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
Abstract
The invention provides a method and a device for preventing silver ion electromigration of a nuclear-grade circuit board of a nuclear power plant, which comprise an emergency technical means, wherein the method comprises the steps of combing and analyzing the unexpected transient interference of a unit possibly caused by equipment misoperation, and making a relieving measure; the method also comprises a medium-long term treatment means, namely painting a three-proofing paint on the nuclear-grade circuit board silver pin module and upgrading the functional module. The method and the device for preventing silver ion electromigration of the nuclear-grade circuit board of the nuclear power plant are novel in design and high in practicability.
Description
Technical Field
The invention relates to the field of maintenance of nuclear-grade circuit boards of nuclear power plants, in particular to a method and a device for preventing silver ion electromigration of a nuclear-grade circuit board of a nuclear power plant.
Background
Silver ion electromigration of a nuclear-grade circuit board of a nuclear power plant can cause address serial codes and card faults, so that communication between a CPU and the card is abnormal; the instructions of the received CPU are changed, so that the safety equipment such as special safety facilities and the like are refused to operate or are operated mistakenly, and the safety of the nuclear power plant is influenced. And the method has the advantages of quickly searching the fault reason, providing effective correction measures, preventing fault retransmission and ensuring the safe and stable operation of the unit.
Disclosure of Invention
The invention provides a method and a device for preventing silver ion electromigration of a nuclear-grade circuit board of a nuclear power plant, aiming at the problems.
The technical scheme provided by the invention for the technical problem is as follows:
a method for preventing silver ion electromigration of a nuclear-grade circuit board of a nuclear power plant is characterized by comprising an emergency technical means for relieving unit operation risks and reducing fault time; the method also comprises a medium-long term means of eliminating silver ion electromigration paths and/or upgrading clamping pieces and adding fault monitoring and alarming functions to the system by painting three-proofing paint.
In the above prevention method of the present invention, the emergency technical means includes the steps of: screening a list of functional cards of the nuclear-grade circuit board of the nuclear power plant according to the failure result; working tasks of corresponding operation intervention plans and special emergency maintenance work orders are formulated according to the function card piece list, so that timely corrective maintenance can be carried out on the function card pieces with faults;
the preventive intervention plan comprises a maintenance intervention plan, an operation intervention plan and a supplement daily inspection requirement plan.
In the above prevention method of the present invention, the method further comprises: identifying the criticality of the card, and identifying a card list used for controlling equipment which is considered to be the most important function of the power plant;
the equipment with the most important functions of the power plant comprises single failure sensitive equipment, equipment which needs to be withdrawn within 8 hours in the first group of unavailable events recorded by the unit, and equipment which automatically acts when an emergency safety program is executed after the first group of unavailable events recorded by the unit; a single failure sensitive device is a device that fails causing the unit to shut down automatically or by being forced to shut down.
In the prevention method, the medium-long term means comprises painting a three-proofing paint on the nuclear-grade circuit board silver pin module and/or upgrading a functional module.
In the above prevention method of the present invention, the step of painting the three-proofing paint on the core-level circuit board with silver pin module includes the following steps:
step Sa1, cleaning the surface of the silver-carrying pin module by using alcohol, and removing surface dust and silver ion migration products;
step Sa2, carrying out surface inspection on the silver-carrying pin module by using a microscope, and brushing three-proofing paint on the silver-carrying pin module if the surface meets the preset cleaning requirement;
if the surface of the module with the silver pins does not meet the preset cleaning requirement, repeating the step Sa 1;
and step Sa3, airing the silver-carrying pin module.
In the above prevention method of the present invention, the step of upgrading the functional module includes the following steps:
step Sb1, adding a locking device on the functional module, electrically connecting one end of the locking device with the comparator, electrically connecting the other end of the locking device with the silver pin module, recording the state of each silver pin module in an initialization state when the functional module is put into use for the first time, and locking the silver pin module;
and step Sb2, adding a detector on the functional module, wherein the detector is electrically connected with the silver pin module and the locking device respectively and is used for sending out a fault alarm and keeping the card clamping function by taking the latched information as a default value when the state of the silver pin module is not consistent with the locked information.
In another aspect of the present invention, an apparatus for preventing silver ion electromigration in a nuclear-grade circuit board of a nuclear power plant is provided, which is characterized in that the apparatus is mounted on a pin status detection module; the pin state detection module comprises a comparator;
the preventing device comprises a locking device, one end of the locking device is electrically connected with the comparator, and the other end of the locking device is respectively electrically connected with the SLOTA interface outside the pin state detecting module and the silver-containing pin module and used for locking the state of each silver-containing pin module in the initialization state;
the preventing device further comprises a detector which is electrically connected with the silver pin module, the SLOTA interface and the locking device respectively and used for detecting whether the state of the silver pin module is the same as the information locked by the locking device or not.
The invention provides a set of complete correction measure technical scheme for nuclear-grade circuit boards with large quantity and high importance degree. The method comprises the steps of combing and analyzing unexpected transient interference of a unit possibly caused by equipment misoperation, identifying the criticality of a card, identifying a card list of equipment which is used for controlling the most important function of a power plant, formulating a fault prevention driving protection scheme and an emergency scheme, wherein the fault prevention driving protection scheme comprises a maintenance intervention scheme, an operation intervention scheme and daily operation inspection contents, ensuring timely and effective treatment after a fault, and reducing the fault time as much as possible; coating a conformal paint on the clamping piece and upgrading the functional module during the overhaul period of the unit by a medium-long term correction measure, and coating the conformal paint on a hardware layer to block the EC-mg phenomenon so as to prevent the pins of the module with the silver pins from being polluted by ions; on the software level, the pin state is latched through the software upgrading of the functional module, the change of the pin state is monitored in real time, an alarm is given out when the pin state changes, the output mode of the card is locked, and the misoperation or the refusal of equipment is prevented. The method and the device for preventing silver ion electromigration of the nuclear-grade circuit board of the nuclear power plant are novel in design and high in practicability.
Drawings
FIG. 1 shows a picture of a painting spot of a nuclear grade circuit board of a nuclear power plant;
fig. 2 is a schematic diagram illustrating a device for preventing silver ion electromigration of a nuclear-grade circuit board of a nuclear power plant provided by the invention.
Detailed Description
The technical problem to be solved by the invention is as follows: the silver ion electromigration of the nuclear-grade circuit board can cause address serial codes and card faults, and can also cause the instruction of a receiving CPU to change, thereby causing the refusal or misoperation of safety equipment such as special safety facilities and the like. The invention provides a solution idea for the technical problem: the emergency technical means of alleviating the unit operation risk and reducing the fault time is adopted, the tri-proof paint is coated on the silver pin module of the nuclear-grade circuit board, and the problems of address string codes and clamping part faults caused by silver ion electromigration are solved by medium and long term means such as upgrading the functional module, and the nuclear potential safety hazard is eliminated.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The first embodiment of the method for preventing silver ion electromigration of the nuclear-grade circuit board of the nuclear power plant, which is provided by the invention, comprises the following three links:
1) an emergency technical means for relieving the unit operation risk and reducing the fault time is adopted;
2) a medium-long term means of eliminating silver ion electromigration paths by painting three-proofing paint;
3) and a medium-long term means of upgrading the card or the system to increase fault monitoring and alarming functions.
According to another embodiment of the invention, the method comprises the following 2 steps:
1) an emergency technical means for relieving the unit operation risk and reducing the fault time is adopted;
2) a medium-long term means of eliminating silver ion electromigration paths by painting three-proofing paint;
according to another embodiment of the invention, the method comprises the following 2 steps:
1) an emergency technical means for relieving the unit operation risk and reducing the fault time is adopted;
2) and a medium-long term means of upgrading the card or the system to increase fault monitoring and alarming functions.
The following is described for the portions related to the above embodiments:
1) the emergency technical means comprises the following steps: screening a list of functional cards of the nuclear-grade circuit board of the nuclear power plant according to the failure result; working tasks of corresponding operation intervention plans and special emergency maintenance work orders are formulated according to the function card piece list, so that timely corrective maintenance can be carried out on the function card pieces with faults;
the preventive intervention plan comprises a maintenance intervention plan, an operation intervention plan and a supplement daily inspection requirement plan.
2) The steps further include: identifying the criticality of the card, and identifying a card list used for controlling equipment which is considered to be the most important function of the power plant;
the equipment with the most important functions of the power plant comprises single failure sensitive equipment, equipment which needs to be withdrawn within 8 hours in the first group of unavailable events recorded by the unit, and equipment which automatically acts when an emergency safety program is executed after the first group of unavailable events recorded by the unit; a single failure sensitive device is a device that fails causing the unit to shut down automatically or by being forced to shut down.
3) The medium and long term means comprises the steps of painting a three-proofing paint on the nuclear-grade circuit board silver pin module to eliminate a silver ion electromigration path and/or upgrading a functional module.
4) The method comprises the following steps of coating a three-proofing paint on a nuclear-grade circuit board silver pin module:
step Sa1, cleaning the surface of the silver-carrying pin module by using alcohol, and removing surface dust and silver ion migration products;
step Sa2, carrying out surface inspection on the silver-carrying pin module by using a microscope, and brushing three-proofing paint on the silver-carrying pin module if the surface meets the preset cleaning requirement;
if the surface of the module with the silver pins does not meet the preset cleaning requirement, repeating the step Sa 1;
and step Sa3, airing the silver-carrying pin module.
5) The step of upgrading the functional module comprises the following steps:
step Sb1, adding a locking device on the functional module, electrically connecting one end of the locking device with the comparator, electrically connecting the other end of the locking device with the silver pin module, recording the state of each silver pin module in an initialization state when the functional module is put into use for the first time, and locking the silver pin module;
and step Sb2, adding a detector on the functional module, wherein the detector is electrically connected with the silver pin module and the locking device respectively and is used for sending out a fault alarm and keeping the card clamping function by taking the latched information as a default value when the state of the silver pin module is not consistent with the locked information.
6) The upgrading card comprises the step of upgrading the pin state detection module 100; the pin status detecting module 100 includes a comparator 110; the comparator 110 is electrically connected with the SLOTA interface 200 and the silver pin module 300 respectively; the step of upgrading the pin status detection module 100 specifically includes the following substeps:
step Sb1, add the locking device 120 on the pin status detection module 100, so that one end of the locking device 120 is electrically connected to the comparator 110, and the other end of the locking device 120 is electrically connected to the SLOTA interface 200 and the silver-containing pin module 300, respectively, for locking the status of each silver-containing pin module in the initialization state;
step Sb2, add a detector 130 on the pin status detection module 100, where the detector 130 is electrically connected to the silver-containing pin module 300, the SLOTA interface 200, and the locking device 120 respectively, and is used to detect whether the status information of the silver-containing pin module 300 is the same as the information locked by the locking device 120.
In the technical scheme, the emergency technical means comprises the steps of screening a list of functional cards of the nuclear-grade circuit board of the nuclear power plant according to failure results; a corresponding preventive intervention plan is made according to the list of the functional cards so as to carry out timely corrective maintenance on the functional cards with faults;
preventive intervention plans include maintenance intervention plans, operation intervention plans, and supplement daily patrol requirement plans (as needed). Through formulating preventive driving protection scheme and emergency plan, carry out timely corrective maintenance to the fastener that breaks down, reduce down time as far as possible.
And preparing a daily operation period according to the function card piece list. By integrating technical resources, the integrity and the performability of important function analysis, card piece identification and intervention plan are ensured through ODM operation decision management flow, spare part conditions without quality defects are screened out to be used as spare parts of emergency plans, and spare part information sharing is well done.
The equipment with the most important functions of the power plant comprises single failure sensitive equipment, equipment which needs to be withdrawn within 8 hours in the first group of unavailable events recorded by the unit, and equipment which automatically acts when an emergency safety program is executed after the first group of unavailable events recorded by the unit; a single failure sensitive device is a device that fails causing the unit to shut down automatically or by being forced to shut down.
Further, the medium-long term means comprises a step of painting a three-proofing paint on the core-grade circuit board silver pin module and/or a step of upgrading the pin state detection module 100.
Specifically, as shown in fig. 1 and 2, fig. 1 shows a picture of a painting point of a nuclear-grade circuit board of a nuclear power plant, and fig. 2 shows a schematic diagram of a silver ion electromigration prevention device of the nuclear-grade circuit board of the nuclear power plant. The step of painting the three-proofing paint on the silver pin module 300 of the nuclear-grade circuit board comprises the following substeps:
step Sa1, cleaning the surface of the silver-carrying pin module 300 with alcohol to remove surface dust and silver ion migration products;
step Sa2, performing surface inspection on the silver pin module 300 by using a microscope, and painting a three-proofing paint on the silver pin module 300 if the surface of the silver pin module 300 meets a preset cleaning requirement;
if the surface of the module 300 with the silver pins does not meet the preset cleaning requirement, repeating the step Sa 1;
and step Sa3, airing the silver-carrying pin module 300.
By coating the three-proofing paint on the nuclear-grade circuit board with silver pin module 300, as shown in fig. 1, the electrochemical migration process can be inhibited, the silver pin module 300 is prevented from being polluted by ions, and the problem of code string caused by silver migration is effectively solved. In fig. 1, the nearly circular painting places are painting points.
Further, as shown in fig. 2, the method for preventing silver ion electromigration of the nuclear-grade circuit board in the nuclear power plant further includes the step of upgrading the pin status detection module 100; the pin status detection module 100 includes a comparator 110; the comparator 110 is electrically connected with the SLOTA interface 200 and the silver pin module 300 respectively;
the step of upgrading the pin status detection module 100 specifically includes the following substeps:
step Sb1, add the locking device 120 on the pin status detection module 100, so that one end of the locking device 120 is electrically connected to the comparator 110, and the other end of the locking device 120 is electrically connected to the SLOTA interface 200 and the silver-containing pin module 300, respectively, for locking the status of each silver-containing pin module in the initialization state;
step Sb2, add a detector 130 on the pin status detection module 100, where the detector 130 is electrically connected to the silver-containing pin module 300, the SLOTA interface 200, and the locking device 120 respectively, and is used to detect whether the status information of the silver-containing pin module 300 is the same as the information locked by the locking device 120.
By adding the locking device 120, after the card is powered on for the first time, the state information of each silver-containing pin in the initialization state is read, and the information is recorded in the pin state detection module 100 and locked. By locking the state information, even if silver ion electromigration occurs, the state of the silver pin module 300 cannot be changed, and the control function of the card is not influenced.
By adding the detector 130, the state information of the silver pin module 300 is compared with the information locked by the locking device 120, and if the state information is not consistent with the information locked by the locking device 120, an alarm is given through the engineering tool 400.
Through upgrading the pin state detection module, the consequence of the short-circuit serial code fault of the silver-containing pin module 300 is controlled, the condition that equipment is unavailable is prevented, the function of the silver-containing pin module 300 is not affected after modification, the increased response time is less than 0.1S, and the increased response time can be ignored.
Further, as shown in fig. 2, the present invention also provides a device for preventing silver ion electromigration of a nuclear-grade circuit board in a nuclear power plant, which is installed on the pin status detecting module 100; the pin status detection module 100 includes a comparator 110;
the preventing device comprises a locking device 120, one end of the locking device 120 is electrically connected with the comparator 110, and the other end of the locking device 120 is electrically connected with the SLOTA interface 200 and the silver-containing pin module 300 outside the pin state detecting module 100 respectively, and is used for locking the state of each silver-containing pin module in the initialization state;
the preventing device further comprises a detector 130, wherein the detector 130 is electrically connected to the silver pin module 300, the SLOTA interface 200 and the locking device 120, respectively, and is used for detecting whether the state information of the silver pin module 300 is the same as the information locked by the locking device 120.
By adding the locking device 120, after the card is electrified for the first time, the state of each silver pin module in the initialization state is read, and information is recorded in the pin state detection module 100 and locked. By locking the state information, even if silver ion electromigration occurs, the state of the silver pin module 300 cannot be changed, and the control function of the card is not influenced.
By adding the detector 130, the state information of the silver pin module 300 is compared with the information locked by the locking device 120, and if the state information is not consistent with the information locked by the locking device 120, an alarm is given through the engineering tool 400.
Through upgrading the pin state detection module, the consequence of the short-circuit serial code fault of the silver-containing pin module 300 is controlled, the condition that equipment is unavailable is prevented, the function of the silver-containing pin module 300 is not affected after modification, the increased response time is less than 0.1S, and the increased response time can be ignored.
The invention provides a set of complete correction measure technical scheme for nuclear-grade circuit boards with large quantity and high importance degree. The method comprises the steps of combing and analyzing unexpected transient interference of a unit possibly caused by equipment misoperation, screening a minimum list of important function clamping pieces according to failure results, formulating a fault prevention driving protection scheme and an emergency scheme including a maintenance intervention scheme, an operation intervention scheme and daily operation inspection contents, ensuring timely and effective treatment after a fault, and reducing fault time as much as possible; according to the method, through medium-long term correction measures, the three-proofing paint is coated on the clamping piece during the overhaul period of the unit, the functional module is upgraded, and on the hardware level, the three-proofing paint is coated to block the EC-mg phenomenon, so that the pins of the module with the silver pins are prevented from being polluted by ions; on the software level, the pin state is latched through the software upgrading of the functional module, the change of the pin state is monitored in real time, an alarm is given out when the pin state changes, the output mode of the card is locked, and the misoperation or the refusal of equipment is prevented. The method and the device for preventing silver ion electromigration of the nuclear-grade circuit board of the nuclear power plant are novel in design and high in practicability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A method for preventing silver ion electromigration of a nuclear-grade circuit board of a nuclear power plant is characterized by comprising an emergency technical means for relieving unit operation risks and reducing fault time; the method also comprises a medium-long term means of eliminating silver ion electromigration paths and/or upgrading the clamping piece and adding fault monitoring and alarming functions to the system by painting three-proofing paint;
the medium and long term means comprises upgrading a functional module;
the step of upgrading the functional module comprises the following steps:
step Sb1, adding a locking device on the functional module, electrically connecting one end of the locking device with the comparator, electrically connecting the other end of the locking device with the silver pin module, recording the state of each silver pin module in an initialization state when the functional module is put into use for the first time, and locking the silver pin module;
and step Sb2, adding a detector on the functional module, wherein the detector is electrically connected with the silver pin module and the locking device respectively and is used for sending out a fault alarm and keeping the card clamping function by taking the latched information as a default value when the state of the silver pin module is not consistent with the locked information.
2. The prevention method according to claim 1, characterized in that said emergency technical means comprise the following steps: screening a list of functional cards of the nuclear-grade circuit board of the nuclear power plant according to the failure result; working tasks of corresponding operation intervention plans and special emergency maintenance work orders are formulated according to the function card piece list, so that timely corrective maintenance can be carried out on the function card pieces with faults;
the preventive intervention plan comprises a maintenance intervention plan, an operation intervention plan and a supplement daily inspection requirement plan.
3. The prevention method according to claim 2, further comprising: identifying the criticality of the card, and identifying a card list used for controlling equipment which is considered to be the most important function of the power plant;
the equipment with the most important functions of the power plant comprises single failure sensitive equipment, equipment which needs to be withdrawn within 8 hours in the first group of unavailable events recorded by the unit, and equipment which automatically acts when an emergency safety program is executed after the first group of unavailable events recorded by the unit; a single failure sensitive device is a device that fails causing the unit to shut down automatically or by being forced to shut down.
4. The prevention method according to claim 1, wherein the medium-long term means further comprises painting a three-proofing paint on the nuclear grade circuit board silver pin module; the step of painting the three-proofing paint on the nuclear-grade circuit board silver pin module comprises the following steps:
step Sa1, cleaning the surface of the silver-carrying pin module by using alcohol, and removing surface dust and silver ion migration products;
step Sa2, carrying out surface inspection on the silver-carrying pin module by using a microscope, and brushing three-proofing paint on the silver-carrying pin module if the surface meets the preset cleaning requirement;
if the surface of the module with the silver pins does not meet the preset cleaning requirement, repeating the step Sa 1;
and step Sa3, airing the silver-carrying pin module.
5. A device for preventing silver ion electromigration of a nuclear-grade circuit board of a nuclear power plant is characterized by being installed on a pin state detection module (100); the pin state detection module (100) comprises a comparator (110);
the preventing device comprises a locking device (120), one end of the locking device (120) is electrically connected with the comparator (110), and the other end of the locking device (120) is respectively electrically connected with an SLOTA interface (200) outside the pin state detecting module (100) and the silver-containing pin module (300) and used for locking the state of each silver-containing pin module in an initialization state;
the preventing device further comprises a detector (130), wherein the detector (130) is electrically connected with the silver pin module (300), the SLOTA interface (200) and the locking device (120) respectively and used for detecting whether the state of the silver pin module (300) is the same as the information locked by the locking device (120).
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| CN201911198195.4A CN110972405B (en) | 2019-11-29 | 2019-11-29 | Method and device for preventing silver ion electromigration of nuclear-grade circuit board of nuclear power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11186673A (en) * | 1997-12-22 | 1999-07-09 | Canon Inc | Printed board |
| CN100437836C (en) * | 2005-03-25 | 2008-11-26 | 大亚湾核电运营管理有限责任公司 | Severe accident diagnosis and handling method for pressurized-water reactor nuclear power station |
| CN101576858A (en) * | 2008-05-06 | 2009-11-11 | 宇瞻科技股份有限公司 | Automatic locking device and automatic locking method for storage medium |
| SG193213A1 (en) * | 2008-08-18 | 2013-09-30 | Semblant Ltd | Halo-hydrocarbon polymer coating |
| CN104657235A (en) * | 2015-03-04 | 2015-05-27 | 广东威创视讯科技股份有限公司 | Self recovery system and state detecting method of self recovery system |
| CN108256713A (en) * | 2016-12-29 | 2018-07-06 | 中核核电运行管理有限公司 | Nuclear power plant system measure of supervision based on ERDB |
| CN107192937B (en) * | 2017-04-19 | 2019-08-30 | 深圳市中兴移动软件有限公司 | Fingerprint chip detecting method and device, electronic equipment and storage medium |
| CN107124831A (en) * | 2017-05-31 | 2017-09-01 | 安徽金诚天骏汽车零部件制造有限公司 | The surface treatment method of PCB |
| CN108710959A (en) * | 2018-06-05 | 2018-10-26 | 广东核电合营有限公司 | Reduce method, nuclear power generating sets and the storage medium of nuclear power generating sets failure rate |
| CN109102089A (en) * | 2018-10-23 | 2018-12-28 | 中核核电运行管理有限公司 | A kind of system monitor method based on effectiveness of maintenance assessment |
| CN109521751A (en) * | 2018-10-23 | 2019-03-26 | 中核核电运行管理有限公司 | A kind of nuclear power plant's key work center method failure mitigation method |
| CN109581185B (en) * | 2018-11-16 | 2021-11-09 | 北京时代民芯科技有限公司 | SoC chip laser simulation single particle irradiation detection and fault positioning method and system |
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