CN104599729A - Method for dry protection of reactor core of dry reactor - Google Patents
Method for dry protection of reactor core of dry reactor Download PDFInfo
- Publication number
- CN104599729A CN104599729A CN201410834544.8A CN201410834544A CN104599729A CN 104599729 A CN104599729 A CN 104599729A CN 201410834544 A CN201410834544 A CN 201410834544A CN 104599729 A CN104599729 A CN 104599729A
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- dry
- protection
- test block
- temperature
- dry protection
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C21/00—Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- 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)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Manufacturing & Machinery (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention belongs to the technical field of building and construction of a nuclear power plant. Aiming at solving the problem that the drying work of current dry protection is not very convenient, the invention provides a method for dry protection of a reactor core of a dry reactor. The method comprises the following steps: (1) pre-burying an inner heater; (2) taking concrete in the step (1) as a test block; (3) assembling the dry protection; (4) fixing an outer heater; (5) fixing the outer heater on the test block; (6) starting the outer heater and the inner heater and heating and drying the dry protection and the test block; (7) keeping the heat of the dry protection and the test block until the weight of the test block is constant after the test block is continuously weighed for three times; and (8) naturally cooling the dry protection. The method is easy to operate so that the drying work of the dry protection becomes simple and convenient and the construction period is shortened.
Description
Technical field
The invention belongs to the technical field of Nuclear Power Station construction, be specifically related to a kind of method doing protection for dry reaction heap reactor core.
Background technology
Dry protection is the important component part of nuclear power plant reactor, and as shown in Figure 1, dry protection 10 is the cylindrical structure of heavy wall.Dry protection comprises the dry protection of the dry protection in top and bottom; the inner and outer diameter that protection is done on top is respectively 5560mm and 6710mm; high 3095mm; the inner and outer diameter that protection is done in bottom is respectively 5560mm and 6710mm; high 2200mm; need again dry protection integral hoisting to be introduced into nuclear island reactor core, to reach the object of radiation proof and thermoshield by after the dry protection assembling of dry for top protection and bottom.When making dry protection; need to build serpentine concrete, wherein after serpentine concrete is built and hardened, according to designing requirement between the inwall 12 and outer wall 11 of dry protection 10; drying to be carried out, to be evaporated away by the moisture dissociated in serpentine concrete to dry protection 10.Usually at present, large-scale drying oven is put in dry protection 10 carry out drying, but after dry protection 10 casting concrete heavily about 150 tons, the hoisting transportation work of dry protection is very difficult, causes the drying operation of dry protection very inconvenient.
Summary of the invention
In order to the problem that the drying operation solving dry protection is at present very inconvenient, the present invention proposes a kind of method doing protection for dry reaction heap reactor core, to make the drying operation of dry protection simple and convenient, is easy to operation.
The method doing protection for dry reaction heap reactor core of the present invention comprises the following steps:
(1) with when doing protection described in concreting, by pre-buried for several interior heaters in described dry protection;
(2) concrete in step (1) is got as test block, by pre-buried for several interior heaters in described test block;
(3) the dry protection of the dry protection in top and bottom is assembled;
(4) several external heaters are set respectively on the inside and outside wall of described dry protection; Then on the inside and outside wall of described dry protection, arrange heat-insulation layer, the inside and outside wall of dry protection and external heater wrap by described heat-insulation layer;
(5) be fixed on by external heater in described test block, then in described test block, arrange heat-insulation layer, described test block and the external heater be fixed in test block wrap by described heat-insulation layer;
(6) start described external heater and the interior heater of the upper setting of dry protection, the temperature of described dry protection is risen to 125-200 degree, and programming rate is no more than 25 degree/hour, after temperature rises to 125-200 degree, starts insulation, insulation 60-80 hour; Start external heater and interior heater that described test block is arranged simultaneously, the temperature of described test block is risen to the temperature identical with described dry protection, and programming rate is identical with the programming rate of described dry protection, the temperature of described test block rise to identical with the temperature of described dry protection after, start insulation, temperature retention time is identical with the dry temperature retention time protected; Temperature in this step, programming rate and temperature retention time all coordinate with the characteristic of serpentine concrete, can either carry out drying to serpentine concrete, can prevent again serpentine concrete from chapping;
(7) continue to heat up to dry protection, the temperature of described dry protection is risen to 200-300 degree, and programming rate is no more than 25 degree/hour; After the temperature of described dry protection rises to 200-300 degree, be incubated, be incubated more than 24 hours; Continue to heat up to test block simultaneously, the temperature of described test block is risen to identical with the temperature of dry protection, programming rate is identical with the dry programming rate protected, then be incubated, be incubated more than 24 hours, then start to weigh to described test block, when continuous three constant weight of weighing of described test block are constant, perform step (8) below, otherwise dry protection and test block all continue insulation;
(8) close interior heater and external heater, dry conservation of nature is cooled, cooling period, environment temperature is not less than 15 degree.Because in (7) step, the temperature of dry protection has risen to 200 degree, and temperature is higher; so dry conservation of nature cooling period environment temperature can not be too low; otherwise because environment temperature and the dry temperature difference protected are comparatively large, dry protection cooling is too fast, and easily causes concrete cracking.
Wherein, in described step (6), described temperature retention time is 72 hours.
Wherein, in described step (2), described test block is cubical structure.
Wherein, described step (4) is also included on the bottom surface of dry protection or top and installs thermopair.
Wherein, described step (5) is also included in test block and installs thermopair.
Wherein, described interior heater is round steel, uses AC welding set to heat described interior heater.
Wherein, described external heater comprises round steel and steel pipe, and described round steel is arranged in described steel pipe, is filled with cement and dry fine quartz sand between described round steel and steel pipe; AC welding set is used to heat described external heater.
Wherein, in described step (4), described external heater utilizes angle steel point to be welded on the inside and outside wall of described dry protection.
Wherein, described heat-insulation layer is heat-preservation cotton.
The method doing protection for dry reaction heap reactor core of the present invention has following beneficial effect:
1., in prior art, during dry dry protection, need dry protection to lift in large-scale drying oven, due to dry protection heavily about 150 tons, so hoisting process is very difficult, and the method doing protection for dry reaction heap reactor core of the present invention by by pre-buried for interior heater in dry protection, external heater is fixed on the inside and outside wall of dry protection, then use AC welding set to external heater and interior heater heating, the heat of external heater and interior heater makes the temperature of dry protection raise, and the temperature of external heater and interior heater is controlled by the change of AC welding set electric current, and then control the temperature of dry protection, the temperature of dry protection is raised, concrete water evaporates in protection will be done, realize the object of dry dry protection, compared with the dry method protected of prior art drying, method of the present invention need not to dry protection lifting, protection will be done to dry protection heating dry by external heater and interior heater, method of the present invention is easy to operation, what the operation of dry dry protection was become is simple and convenient, saves the construction period.
If 2. do protection to the dry protection in top and bottom to carry out intensification drying respectively, due to heat uneven, concrete expansion is uneven, remaining water cut is uneven and the reason such as concrete cracking may cause the dry protection in top and bottom to do protection to deform, causing top to do protection and bottom, to do the assembling of protection very difficult or cannot assemble; And method of the present invention does after protection group installs in the dry protection in top and bottom, restart external heater and interior heater, intensifications is carried out to dry protection dry, top can be avoided to do protect and the risk that protection can not assemble is done in bottom.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of dry protection;
Fig. 2 is the schematic diagram doing the method for protection for dry reaction heap reactor core of the present invention.
Embodiment
Method of the present invention is introduced below in conjunction with Fig. 2 and three embodiment.
Embodiment one:
The method doing protection for dry reaction heap reactor core of the present invention comprises the following steps:
(1) as shown in Figure 2, when doing protection 10 with concreting, by pre-buried for interior heater 15 in dry protection, the number of interior heater 15 is several, and interior heater 15 is uniformly distributed in dry protection 10, heating dry protection 10 equably;
(2) concrete in step (1) is got as test block, by pre-buried for interior heater in test block, this test block can be cubical structure, the pre-buried number to the interior heater in test block is several, interior heater is uniformly distributed in test block, heating test block equably; Test block is equivalent to be poured into the concrete sample in dry protection 10; in step below; identical with to the disposal route of dry protection 10 to the disposal route of test block, whether the effect of the concrete drying that the weight change situation eventually through test block judges in dry protection 10 meets the requirements.
(3) dry protection 10 comprises the dry protection of the dry protection in top and bottom, protection group is done in dry for top protection and bottom and dresses up as a whole.
(4) external heater 14 is set respectively on the inwall 12 and outer wall 11 of dry protection 10, external heater 14 can be welded in dry protection 10 by angle steel point inwall 12 and outer wall 11 on; The effect of external heater 14 is that the number of external heater 14 is several for dry protection 10 is heated, on the inwall 12 being evenly distributed on dry protection 10 and outer wall 11, can evenly heat dry protection 10; Then on the inwall 12 and outer wall 11 of dry protection 10, arrange heat-insulation layer 13 respectively, the inwall 12 of dry protection 10 and outer wall 11 and external heater 14 wrap by heat-insulation layer 13; Thermopair 16 is installed in the bottom surface or top of dry protection 10, in order to detect the temperature of dry protection 10;
(5) be fixed in test block by external heater, then in test block, arrange heat-insulation layer, test block and the external heater be fixed in test block wrap by heat-insulation layer; And in test block, thermopair is installed, to detect the temperature of test block;
(6) start the external heater 14 that dry protection 10 is arranged and interior heater 15, the temperature of dry protection 10 is risen to 125 degree, and programming rate is 25 degree/hour; After the temperature of dry protection 10 rises to 125 degree, be incubated 60 hours; Start the external heater that test block is arranged and interior heater, the temperature of test block is risen to 125 degree, and programming rate is 25 degree/hour simultaneously; After the temperature of test block rises to 125 degree, be incubated 60 hours;
(7) continue to heat up to dry protection 10, the temperature of dry protection 10 is risen to 200 degree, and programming rate is 25 degree/hour; After the temperature of dry protection 10 rises to 200 degree, be incubated, be incubated 24 hours; Continue to heat up to test block, the temperature of test block is risen to 200 degree, and programming rate is 25 degree/hour simultaneously; After the temperature of test block rises to 200 degree, be incubated, be incubated 24 hours, then start to weigh to test block, when continuous three constant weight of weighing of test block are constant, perform step (8) below, otherwise dry protection 10 and test block all continue insulation;
(8) close interior heater 15 and external heater 14, dry protection 10 is cooled naturally, cooling period, environment temperature is 15 degree.
Wherein, interior heater is 15 round steel; External heater 14 comprises round steel and steel pipe, and round steel is arranged in steel pipe, is filled with cement and dry fine quartz sand between round steel and steel pipe; AC welding set can be used to heat interior heater 15 and external heater 14.
Embodiment two:
The method doing protection for dry reaction heap reactor core of the present invention comprises the following steps:
(1) as shown in Figure 2, when doing protection 10 with concreting, by pre-buried for interior heater 15 in dry protection, the number of interior heater 15 is several, and interior heater 15 is uniformly distributed in dry protection 10, heating dry protection 10 equably;
(2) concrete in step (1) is got as test block, by pre-buried for interior heater in test block, this test block can be cubical structure, the pre-buried number to the interior heater in test block is several, interior heater is uniformly distributed in test block, heating test block equably; Test block is equivalent to be poured into the concrete sample in dry protection 10; in step below; identical with to the disposal route of dry protection 10 to the disposal route of test block, whether the effect of the concrete drying that the weight change situation eventually through test block judges in dry protection 10 meets the requirements.
(3) dry protection 10 comprises the dry protection of the dry protection in top and bottom, protection group is done in dry for top protection and bottom and dresses up as a whole.
(4) external heater 14 is set respectively on the inwall 12 and outer wall 11 of dry protection 10, external heater 14 can be welded in dry protection 10 by angle steel point inwall 12 and outer wall 11 on; The effect of external heater 14 is that the number of external heater 14 is several for dry protection 10 is heated, on the inwall 12 being evenly distributed on dry protection 10 and outer wall 11, can evenly heat dry protection 10; Then on the inwall 12 and outer wall 11 of dry protection 10, arrange heat-insulation layer 13 respectively, the inwall 12 of dry protection 10 and outer wall 11 and external heater 14 wrap by heat-insulation layer 13; Thermopair 16 is installed in the bottom surface or top of dry protection 10, in order to detect the temperature of dry protection 10;
(5) be fixed in test block by external heater, then in test block, arrange heat-insulation layer, test block and the external heater be fixed in test block wrap by heat-insulation layer; And in test block, thermopair is installed, to detect the temperature of test block;
(6) start the external heater 14 that dry protection 10 is arranged and interior heater 15, the temperature of dry protection 10 is risen to 165 degree, and programming rate is 20 degree/hour; After the temperature of dry protection 10 rises to 165 degree, be incubated 72 hours; Start the external heater that test block is arranged and interior heater, the temperature of test block is risen to 165 degree, and programming rate is 20 degree/hour simultaneously; After the temperature of test block rises to 165 degree, be incubated 72 hours;
(7) continue to heat up to dry protection 10, the temperature of dry protection 10 is risen to 250 degree, and programming rate is 20 degree/hour; After the temperature of dry protection 10 rises to 250 degree, be incubated, be incubated 30 hours; Continue to heat up to test block, the temperature of test block is risen to 250 degree, and programming rate is 20 degree/hour simultaneously; After the temperature of test block rises to 250 degree, be incubated, be incubated 30 hours, then start to weigh to test block, when continuous three constant weight of weighing of test block are constant, perform step (8) below, otherwise dry protection 10 and test block all continue insulation;
(8) close interior heater 15 and external heater 14, dry protection 10 is cooled naturally, cooling period, environment temperature is 20 degree.
Wherein, interior heater is 15 round steel; External heater 14 comprises round steel and steel pipe, and round steel is arranged in steel pipe, is filled with cement and dry fine quartz sand between round steel and steel pipe; AC welding set can be used to heat interior heater 15 and external heater 14.
Embodiment three:
The method doing protection for dry reaction heap reactor core of the present invention comprises the following steps:
(1) as shown in Figure 2, when doing protection 10 with concreting, by pre-buried for interior heater 15 in dry protection, the number of interior heater 15 is several, and interior heater 15 is uniformly distributed in dry protection 10, heating dry protection 10 equably;
(2) concrete in step (1) is got as test block, by pre-buried for interior heater in test block, this test block can be cubical structure, the pre-buried number to the interior heater in test block is several, interior heater is uniformly distributed in test block, heating test block equably; Test block is equivalent to be poured into the concrete sample in dry protection 10; in step below; identical with to the disposal route of dry protection 10 to the disposal route of test block, whether the effect of the concrete drying that the weight change situation eventually through test block judges in dry protection 10 meets the requirements.
(3) dry protection 10 comprises the dry protection of the dry protection in top and bottom, protection group is done in dry for top protection and bottom and dresses up as a whole.
(4) external heater 14 is set respectively on the inwall 12 and outer wall 11 of dry protection 10, external heater 14 can be welded in dry protection 10 by angle steel point inwall 12 and outer wall 11 on; The effect of external heater 14 is that the number of external heater 14 is several for dry protection 10 is heated, on the inwall 12 being evenly distributed on dry protection 10 and outer wall 11, can evenly heat dry protection 10; Then on the inwall 12 and outer wall 11 of dry protection 10, arrange heat-insulation layer 13 respectively, the inwall 12 of dry protection 10 and outer wall 11 and external heater 14 wrap by heat-insulation layer 13; Thermopair 16 is installed in the bottom surface or top of dry protection 10, in order to detect the temperature of dry protection 10;
(5) be fixed in test block by external heater, then in test block, arrange heat-insulation layer, test block and the external heater be fixed in test block wrap by heat-insulation layer; And in test block, thermopair is installed, to detect the temperature of test block;
(6) start the external heater 14 that dry protection 10 is arranged and interior heater 15, the temperature of dry protection 10 is risen to 200 degree, and programming rate is 18 degree/hour; After the temperature of dry protection 10 rises to 200 degree, be incubated 80 hours; Start the external heater that test block is arranged and interior heater, the temperature of test block is risen to 200 degree, and programming rate is 18 degree/hour simultaneously; After the temperature of test block rises to 200 degree, be incubated 80 hours;
(7) continue to heat up to dry protection 10, the temperature of dry protection 10 is risen to 300 degree, and programming rate is 18 degree/hour; After the temperature of dry protection 10 rises to 300 degree, be incubated, be incubated 35 hours; Continue to heat up to test block, the temperature of test block is risen to 300 degree, and programming rate is 18 degree/hour simultaneously; After the temperature of test block rises to 300 degree, be incubated, be incubated 35 hours, then start to weigh to test block, when continuous three constant weight of weighing of test block are constant, perform step (8) below, otherwise dry protection 10 and test block all continue insulation;
(8) close interior heater 15 and external heater 14, dry protection 10 is cooled naturally, cooling period, environment temperature is 25 degree.
Wherein, interior heater is 15 round steel; External heater 14 comprises round steel and steel pipe, and round steel is arranged in steel pipe, is filled with cement and dry fine quartz sand between round steel and steel pipe; AC welding set can be used to heat interior heater 15 and external heater 14.
Method of the present invention need not to dry protection lifting, and will do protection by external heater and interior heater to dry protection heating dry, method of the present invention is easy to operation, and what the operation of dry dry protection was become is simple and convenient, saves the construction period.Method of the present invention does after protection group installs in the dry protection in top and bottom, restarts external heater and interior heater, carry out intensifications dry to dry protection, top can be avoided to do protect and the risk that protection can not assemble is done in bottom; If do protection to the dry protection in top and bottom to carry out intensification drying respectively; due to heat uneven, concrete expansion is uneven, remaining water cut is uneven and the reason such as concrete cracking may cause the dry protection in top and bottom to do protection to deform, causing top to do protection and bottom, to do the assembling of protection very difficult or cannot assemble.
Claims (9)
1. do a method for protection for dry reaction heap reactor core, it is characterized in that, the method comprises the following steps:
(1) with when doing protection described in concreting, by pre-buried for several interior heaters in described dry protection;
(2) concrete in step (1) is got as test block, by pre-buried for several interior heaters in described test block;
(3) the dry protection of the dry protection in top and bottom is assembled;
(4) several external heaters are set respectively on the inside and outside wall of described dry protection; Then on the inside and outside wall of described dry protection, arrange heat-insulation layer, the inside and outside wall of dry protection and external heater wrap by described heat-insulation layer;
(5) be fixed on by external heater in described test block, then in described test block, arrange heat-insulation layer, described test block and the external heater be fixed in test block wrap by described heat-insulation layer;
(6) start the external heater that described dry protection is arranged and interior heater, the temperature of described dry protection is risen to 125-200 degree, and programming rate is no more than 25 degree/hour, after temperature rises to 125-200 degree, starts insulation, insulation 60-80 hour; Start external heater and interior heater that described test block is arranged simultaneously, the temperature of described test block is risen to the temperature identical with described dry protection, and programming rate is identical with the programming rate of described dry protection, the temperature of described test block rise to identical with the temperature of described dry protection after, start insulation, temperature retention time is identical with the dry temperature retention time protected;
(7) continue to heat up to dry protection, the temperature of described dry protection is risen to 200-300 degree, and programming rate is no more than 25 degree/hour; After the temperature of described dry protection rises to 200-300 degree, be incubated, be incubated more than 24 hours; Continue to heat up to test block simultaneously, the temperature of described test block is risen to identical with the temperature of dry protection, programming rate is identical with the dry programming rate protected, then be incubated, be incubated more than 24 hours, then start to weigh to described test block, when continuous three constant weight of weighing of described test block are constant, perform step (8) below, otherwise dry protection and test block all continue insulation;
(8) close interior heater and external heater, dry conservation of nature is cooled, cooling period, environment temperature is not less than 15 degree.
2. dry reaction heap reactor core according to claim 1 does the method for protection, and it is characterized in that, in described step (6), described temperature retention time is 72 hours.
3. dry reaction heap reactor core according to claim 1 and 2 does the method for protection, and it is characterized in that, in described step (2), described test block is cubical structure.
4. dry reaction according to claim 1 and 2 heap reactor core does the method for protection, it is characterized in that, described step (4) is also included on the bottom surface of dry protection or top and installs thermopair.
5. dry reaction heap reactor core according to claim 1 and 2 does the method for protection, and it is characterized in that, described step (5) is also included in test block installs thermopair.
6. dry reaction heap reactor core according to claim 1 and 2 does the method for protection, and it is characterized in that, described interior heater is round steel, uses AC welding set to heat described interior heater.
7. dry reaction heap reactor core according to claim 1 and 2 does the method for protection, it is characterized in that, described external heater comprises round steel and steel pipe, and described round steel is arranged in described steel pipe, is filled with cement and dry fine quartz sand between described round steel and steel pipe; AC welding set is used to heat described external heater.
8. dry reaction heap reactor core according to claim 1 and 2 does the method for protection, and it is characterized in that, in described step (4), described external heater utilizes angle steel point to be welded on the inside and outside wall of described dry protection.
9. dry reaction heap reactor core according to claim 1 and 2 does the method for protection, and it is characterized in that, described heat-insulation layer is heat-preservation cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410834544.8A CN104599729B (en) | 2014-12-26 | 2014-12-26 | A method of for the dry protection of dry reaction heap reactor core |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410834544.8A CN104599729B (en) | 2014-12-26 | 2014-12-26 | A method of for the dry protection of dry reaction heap reactor core |
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| CN104599729A true CN104599729A (en) | 2015-05-06 |
| CN104599729B CN104599729B (en) | 2018-09-14 |
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| CN201410834544.8A Active CN104599729B (en) | 2014-12-26 | 2014-12-26 | A method of for the dry protection of dry reaction heap reactor core |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219462A (en) * | 2019-04-22 | 2019-09-10 | 中国核工业华兴建设有限公司 | A kind of dry protective device serpentine concrete pour and its furnace drying method |
| RU2755018C1 (en) * | 2021-03-03 | 2021-09-09 | Акционерное общество "НПО Петропромсервис" | Method for conducting automated heat treatment of serpentinite concrete “dry protection” of a reactor of a nuclear power plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219462A (en) * | 2019-04-22 | 2019-09-10 | 中国核工业华兴建设有限公司 | A kind of dry protective device serpentine concrete pour and its furnace drying method |
| CN110219462B (en) * | 2019-04-22 | 2021-05-11 | 中国核工业华兴建设有限公司 | Method for pouring and drying serpentine concrete for dry protection device |
| RU2755018C1 (en) * | 2021-03-03 | 2021-09-09 | Акционерное общество "НПО Петропромсервис" | Method for conducting automated heat treatment of serpentinite concrete “dry protection” of a reactor of a nuclear power plant |
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| Publication number | Publication date |
|---|---|
| CN104599729B (en) | 2018-09-14 |
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