CN108994559B - Underwater cutting method for cobalt isotope center rod - Google Patents
Underwater cutting method for cobalt isotope center rod Download PDFInfo
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- CN108994559B CN108994559B CN201810972588.5A CN201810972588A CN108994559B CN 108994559 B CN108994559 B CN 108994559B CN 201810972588 A CN201810972588 A CN 201810972588A CN 108994559 B CN108994559 B CN 108994559B
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Abstract
The invention belongs to the technical field of fuel transmission of nuclear power stations, and particularly relates to an underwater cutting method for a cobalt isotope center rod, aiming at developing and developing a high radioactive waste center rod generated after cobalt isotope production, implementing the underwater cutting method, and providing a standard underwater cutting method for ensuring safe and orderly disposal of subsequent high radioactive waste and waste generated after other commercial cobalt isotope reactor production. The method is characterized in that: the method comprises the steps of preparation before cutting, underwater positioning of a cutting machine, cutting implementation, disposal of cutting waste and decontamination of the cutting machine. The underwater cutting method for the cobalt isotope center rod, disclosed by the invention, is convenient to use, popular and easy to understand, strong in practicability, high in economic benefit and capable of ensuring safe and reliable cutting of the cobalt isotope center rod, optimizing and curing the operation steps through years of summary of underwater production experience, greatly improving the efficiency, and completely meeting the existing underwater cutting of the cobalt isotope center rod without low-level human factor events and other emergencies.
Description
Technical Field
The invention belongs to the technical field of fuel transmission of nuclear power stations, and particularly relates to an underwater cutting method for a cobalt isotope center rod.
Background
The invention belongs to the technical field of fuel transmission of nuclear power stations, and particularly relates to a method for conveniently storing and transporting a high-radioactivity central rod in a corresponding container after the disassembly of a heavy water reactor cobalt isotope is completed, aiming at developing and developing an underwater cutting method of the high-radioactivity central rod, and providing a standard underwater cutting method for subsequent safe and orderly disposal of high-radioactivity waste and waste generated after other commercial cobalt reactor isotopes are produced. The method is characterized in that: preparing before cutting, launching the cutting machine to be in place, cutting, transferring cutting wastes, and decontaminating the discharged water of the cutting machine. The underwater cutting method for the cobalt isotope center rod is convenient to use, popular and easy to understand, strong in practicability, safe, reliable and high in economic benefit, ensures that the center rod of high-level waste generated after the production of the cobalt isotope is orderly disposed, optimizes and solidifies the operation steps through years of summary of underwater cutting experiences, greatly improves the efficiency, completely meets the existing underwater cutting requirements of the cobalt isotope center rod, does not generate low-level human factors and other emergencies, and can be popularized to production of the cobalt isotope by similar power stations at home and abroad and underwater high-level metal cutting.
Disclosure of Invention
The invention aims to develop an underwater cutting method for generating a high radioactive waste center rod after cobalt isotope production, so as to ensure safe and orderly disposal of subsequent high radioactive waste and provide a standard underwater cutting method for waste generated after other commercial cobalt isotope stacking production.
The invention is realized by the following steps:
1. the underwater cutting method for the cobalt isotope center rod is characterized in that: the method comprises the following steps:
the method comprises the following steps: preparation work before cutting;
step 1.1: installing the high-definition underwater television monitoring system in place, hanging an underwater camera on a pool fence, connecting a video controller and a display which are positioned at the far end with the underwater camera, and adjusting the video controller to confirm that the image of the display is clear by electrifying;
step 1.2: transferring the cobalt rod center rod to be cut to an existing underwater equipment tipping machine, and turning for 180 degrees;
step 1.3: operating the underwater tipper to move the center rod of the cobalt rod up to the same plane of the tipper port;
step 1.4: rotating a cutting head of a feeding mechanism of the cutting machine for 13 circles anticlockwise;
step 1.5: rotating the clamping mechanism head of the cutting machine anticlockwise for 16 circles;
step 1.6: rotating the cutting clamping head of the cutting machine motor anticlockwise for 16 circles;
step two: launching and positioning a cutting machine;
step 2.1: connecting the 2T hanging strip and the 2T shackle with a lifting lug of the cutting machine;
step 2.2: the other end of the sling is connected with a 2T crane hook in the workshop, and the 2T crane is moved to the position above the underwater tipper, so that the cutting machine is positioned above the tipper;
step 2.3: confirming that the cutting machine and the center hole of the tipping machine are completely centered and positioned by using a high-definition underwater television monitoring system;
step 2.4: connecting a long rod operating tool with a clamping mechanism head of a cutting machine, and rotating the long rod tool clockwise for 12 circles; the long rod operating tool is integrally rod-shaped, and the end head of the long rod operating tool is provided with an inner hexagonal joint which is used for being connected and locked with an operating object;
step 2.5: connecting a long rod operating tool with a cutting machine motor cutting clamping head, and rotating for 11 circles anticlockwise;
step three: cutting;
step 3.1: the cutting implementation preparation work is completely put in place, and a 380V plug is connected with the power input of a submersible motor control box of the cutting machine;
step 3.2: pressing down a power switch of a submersible motor control box of the cutting machine, setting the frequency of the motor control box to be 12Hz, and setting the switch to be No. 1;
step 3.3: the long rod operating tool is connected with a cutting head of a feeding mechanism of the cutting machine and rotates clockwise for 1.5 circles;
step 3.4: confirming that the position of the central rod to be cut is close to by using a high-definition underwater television monitoring system, and rotating the long rod operation tool for 12 circles clockwise at the speed of one circle per minute until the cut part is completely cut off, wherein the confirmation is required by the high-definition underwater television monitoring system;
step 3.5: cutting off a 380V input plug of a submersible motor control box of the cutting machine, and moving the cutting machine to a position above a waste drum in a water pool by using a 2T crane of the factory building;
step four: disposal of cutting waste and decontamination of the cutting machine;
step 4.1: the long rod tool is utilized to rotate the motor anticlockwise in sequence to cut the clamping head, the feeding mechanism cutting head and the clamping mechanism head, and the initial positions of the clamping head, the feeding mechanism cutting head and the clamping mechanism head are confirmed;
step 4.2: pouring all wastes in the fence of the cutting machine into a waste drum by adopting a corresponding operation method;
step 4.3: lifting the 2T crane to lift the cutting machine out of the water surface, and carrying out dose monitoring in real time when the cutting machine is close to the water surface to prevent the occurrence of hot spots and accidental dose irradiation on field workers caused by the existence of the hot spots, wherein if the hot spots exist, the cutting machine can move up and down in the water pool for several times by only vertically operating the crane hook;
step 4.4: when the cutting machine discharges water, the periphery of the cutting machine is washed by a high-pressure water gun while discharging water, so that loose pollution on the surface is removed;
step 4.5, after the washing is finished, confirming that the cutting machine has no loose pollution, if the requirement is not met, correspondingly wiping the cutting machine until no loose pollution exists, and meeting the requirement;
step 4.6: and (3) disconnecting the power supply of the high-definition underwater television monitoring system, detaching the signal lines of the video controller, the display and the underwater camera, wiping and decontaminating the water discharged from the underwater camera, and recovering the normal state after the on-site cleaning is finished.
The invention has the beneficial effects that:
the underwater cutting method for the cobalt isotope center rod, which is described in the invention, is convenient to use, popular and easy to understand, has strong practicability, ensures safe and reliable cutting of the cobalt isotope center rod, has high economic benefit, optimizes and solidifies the operation steps through years of summary of underwater production experience, greatly improves the efficiency, completely meets the existing underwater cutting of the cobalt isotope center rod, does not generate low-level human factors and other emergencies, and can be popularized to the production of cobalt isotopes in similar power stations at home and abroad and the underwater cutting of high-radioactivity metal.
Drawings
FIG. 1 is a flow chart of the cobalt isotope center rod underwater cutting method of the present invention;
fig. 2 is a schematic view of the structure of the cutter used in the present invention.
Wherein: 1. the steel wire rope lifting lug, 2, the motor cutting and clamping head, 3, the feeding mechanism cutting head, 4, the clamping mechanism head and 5, the fence.
Detailed Description
The invention is further described below with reference to the figures and examples.
The specific structure of the cutting machine used in the present invention is disclosed in the issued patent, patent No. ZL 201420867045.4. The invention mainly relates to a cutting machine component shown in figure 2 in the process of using the cutting machine, which comprises a steel wire rope lifting lug 1, a motor cutting clamping head 2, a feeding mechanism cutting head 3, a clamping mechanism head 4 and a fence 5.
As shown in fig. 1, the underwater cutting method of the cobalt isotope center rod specifically comprises the following steps:
the method comprises the following steps: preparation before cutting (fig. one a sequence);
step 1.1: installing the high-definition underwater television monitoring system in place, hanging an underwater camera on a pool fence, connecting a video controller and a display which are positioned at the far end with the underwater camera, and adjusting the video controller to confirm that the image of the display is clear by electrifying;
step 1.2: transferring the cobalt rod center rod to be cut to an existing underwater equipment tipping machine, and turning for 180 degrees;
step 1.3: operating the underwater tipper to move the center rod of the cobalt rod up to the same plane (flush) of the tipper port;
step 1.4: rotating a cutting head 3 of a feeding mechanism of the cutting machine for 13 circles anticlockwise;
step 1.5: rotating the cutter clamping mechanism head 4 anticlockwise for 16 circles;
step 1.6: rotating the cutting clamping head 2 of the cutting machine motor anticlockwise for 16 circles;
step two: cutting machine launch positioning (sequence B of the figure);
step 2.1: the 2T hanging strip and the 2T shackle are connected with a lifting lug 1 of the cutting machine;
step 2.2: the other end of the sling is connected with a 2T crane hook in the workshop, and the 2T crane is moved to the position above the underwater tipper and above the tipper;
step 2.3: confirming that the cutting machine and the center hole of the tipping machine are completely centered and positioned by using a high-definition underwater television monitoring system;
step 2.4: connecting a long rod operating tool with a clamping mechanism head 4 of the cutting machine, and rotating the long rod tool clockwise for 12 circles; the long rod operating tool is integrally rod-shaped, and the end head of the long rod operating tool is provided with an inner hexagonal joint which is used for being connected and locked with an operating object.
Step 2.5: connecting a long rod operating tool with a cutting machine motor cutting clamping head 2, and rotating for 11 circles anticlockwise;
step three: performing cleavage (panel one C sequence);
step 3.1: the cutting implementation preparation work is completely put in place, and a 380V plug is connected with the power input of a submersible motor control box of the cutting machine;
step 3.2: pressing down a power switch of a control box of a submersible motor of the cutting machine, setting the frequency of an electric control box to be 12Hz, and setting the switch to be No. 1;
step 3.3: the long rod operating tool is connected with a cutting head 3 of a feeding mechanism of the cutting machine and rotates clockwise for 1.5 circles;
step 3.4: confirming that the position of the central rod to be cut is close to by using a high-definition underwater television monitoring system, and rotating the long rod operation tool for 12 circles clockwise at the speed of one circle per minute until the cut part is completely cut off, wherein the confirmation is required by the high-definition underwater television monitoring system;
step 3.5: cutting off a 380V input plug of a submersible motor control box of the cutting machine, and moving the cutting machine to a position above a waste drum in a water pool by using a 2T crane of the factory building;
step four: cutting waste disposal and cutter decontamination (fig. one D sequence);
step 4.1: the long rod tool is utilized to rotate the motor anticlockwise to cut the clamping head 2, the feeding mechanism cutting head 3 and the clamping mechanism head 4 in sequence, and the initial positions of the clamping head, the feeding mechanism cutting head and the clamping mechanism head are confirmed;
step 4.2: the corresponding operation method is adopted to pour all the wastes in the cutter fence 5 into a waste drum;
step 4.3: lifting the 2T crane to lift the cutting machine out of the water surface, and carrying out dose monitoring in real time when the cutting machine is close to the water surface to prevent the occurrence of hot spots and accidental dose irradiation on field workers caused by the existence of the hot spots, wherein if the hot spots exist, the cutting machine can move up and down in the water pool for several times by only vertically operating the crane hook;
step 4.4: when the cutting machine discharges water, the periphery of the cutting machine is washed by a high-pressure water gun while discharging water, so that loose pollution on the surface is removed;
step 4.5, after the washing is finished, confirming that the cutting machine has no loose pollution, if the requirement is not met, correspondingly wiping the cutting machine until no loose pollution exists, and meeting the requirement;
step 4.6: and (3) disconnecting the power supply of the high-definition underwater television monitoring system, detaching the signal lines of the video controller, the display and the underwater camera, wiping and decontaminating the water discharged from the underwater camera, and recovering the normal state after the on-site cleaning is finished.
The method of implementing the present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. The prior art can be adopted for the content which is not described in detail in the specification of the present invention.
Claims (1)
1. The underwater cutting method for the cobalt isotope center rod is characterized in that: the method comprises the following steps:
the method comprises the following steps: preparation work before cutting;
step 1.1: installing the high-definition underwater television monitoring system in place, hanging an underwater camera on a pool fence, connecting a video controller and a display which are positioned at the far end with the underwater camera, and adjusting the video controller to confirm that the image of the display is clear by electrifying;
step 1.2: transferring the cobalt rod center rod to be cut to an existing underwater equipment tipping machine, and turning for 180 degrees;
step 1.3: operating the underwater tipper to move the center rod of the cobalt rod up to the same plane of the tipper port;
step 1.4: rotating a cutting head (3) of a feeding mechanism of the cutting machine for 13 circles anticlockwise;
step 1.5: rotating the clamping mechanism head (4) of the cutting machine counterclockwise for 16 circles;
step 1.6: the cutting machine motor cutting clamping head (2) rotates anticlockwise for 16 circles;
step two: launching and positioning a cutting machine;
step 2.1: the 2T hanging strip and the 2T shackle are connected with a lifting lug (1) of the cutting machine;
step 2.2: the other end of the sling is connected with a 2T crane hook in the workshop, and the 2T crane is moved to the position above the underwater tipper, so that the cutting machine is positioned above the tipper;
step 2.3: confirming that the cutting machine and the center hole of the tipping machine are completely centered and positioned by using a high-definition underwater television monitoring system;
step 2.4: connecting a long rod operating tool with a clamping mechanism head (4) of the cutting machine, and clockwise rotating the long rod tool for 12 circles; the long rod operating tool is integrally rod-shaped, and the end head of the long rod operating tool is provided with an inner hexagonal joint which is used for being connected and locked with an operating object;
step 2.5: the long rod operating tool is connected with a cutting machine motor cutting clamping head (2) and rotates anticlockwise for 11 circles;
step three: cutting;
step 3.1: the cutting implementation preparation work is completely put in place, and a 380V plug is connected with the power input of a submersible motor control box of the cutting machine;
step 3.2: pressing down a power switch of a submersible motor control box of the cutting machine, setting the frequency of the motor control box to be 12Hz, and setting the switch to be No. 1;
step 3.3: the long rod operating tool is connected with a cutting head (3) of a feeding mechanism of the cutting machine and rotates clockwise for 1.5 circles;
step 3.4: confirming that the position of the central rod to be cut is close to by using a high-definition underwater television monitoring system, and rotating the long rod operation tool for 12 circles clockwise at the speed of one circle per minute until the cut part is completely cut off, wherein the confirmation is required by the high-definition underwater television monitoring system;
step 3.5: cutting off a 380V input plug of a submersible motor control box of the cutting machine, and moving the cutting machine to a position above a waste drum in a water pool by using a 2T crane of the factory building;
step four: disposal of cutting waste and decontamination of the cutting machine;
step 4.1: a long rod tool is utilized to rotate a motor anticlockwise in sequence to cut the clamping head (2), the feeding mechanism cutting head (3) and the clamping mechanism head (4), and the initial positions of the clamping head, the feeding mechanism cutting head and the clamping mechanism head are confirmed;
step 4.2: the corresponding operation method is adopted to pour all the wastes in the cutting machine fence (5) into a waste drum;
step 4.3: lifting the 2T crane to lift the cutting machine out of the water surface, and carrying out dose monitoring in real time when the cutting machine is close to the water surface to prevent the occurrence of hot spots and accidental dose irradiation on field workers caused by the existence of the hot spots, wherein if the hot spots exist, the cutting machine can move up and down in the water pool for several times by only vertically operating the crane hook;
step 4.4: when the cutting machine discharges water, the periphery of the cutting machine is washed by a high-pressure water gun while discharging water, so that loose pollution on the surface is removed;
step 4.5, after the washing is finished, confirming that the cutting machine has no loose pollution, if the requirement is not met, correspondingly wiping the cutting machine until no loose pollution exists, and meeting the requirement;
step 4.6: and (3) disconnecting the power supply of the high-definition underwater television monitoring system, detaching the signal lines of the video controller, the display and the underwater camera, wiping and decontaminating the water discharged from the underwater camera, and recovering the normal state after the on-site cleaning is finished.
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| CN114905552B (en) * | 2022-04-07 | 2023-06-13 | 中核核电运行管理有限公司 | Heavy water reactor spent fuel basket cutting device |
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| US3605673A (en) * | 1968-09-30 | 1971-09-20 | Mine Safety Appliances Co | Explosively operated cable cutter |
| US3751625A (en) * | 1972-03-01 | 1973-08-07 | Arcair Co | Underwater torch |
| KR101472732B1 (en) * | 2014-04-03 | 2014-12-26 | 주식회사 제이제이프로테크 | Under water demilitarization method for large propulsion unit using easily transferable device |
| CN204366158U (en) * | 2014-12-30 | 2015-06-03 | 中核核电运行管理有限公司 | Cobalt regulating rod center-pole imderwater cutting machine |
| CN107433354A (en) * | 2017-09-19 | 2017-12-05 | 中国核动力研究设计院 | A kind of high radioactivity pipeline imderwater cutting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4349538B2 (en) * | 1999-07-28 | 2009-10-21 | 大成建設株式会社 | Steel cutting device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3605673A (en) * | 1968-09-30 | 1971-09-20 | Mine Safety Appliances Co | Explosively operated cable cutter |
| US3751625A (en) * | 1972-03-01 | 1973-08-07 | Arcair Co | Underwater torch |
| KR101472732B1 (en) * | 2014-04-03 | 2014-12-26 | 주식회사 제이제이프로테크 | Under water demilitarization method for large propulsion unit using easily transferable device |
| CN204366158U (en) * | 2014-12-30 | 2015-06-03 | 中核核电运行管理有限公司 | Cobalt regulating rod center-pole imderwater cutting machine |
| CN107433354A (en) * | 2017-09-19 | 2017-12-05 | 中国核动力研究设计院 | A kind of high radioactivity pipeline imderwater cutting device |
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