CN108597628B - A kind of radiation protection method for Spent Fuel Pool dilatation - Google Patents
A kind of radiation protection method for Spent Fuel Pool dilatation Download PDFInfo
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- CN108597628B CN108597628B CN201810494020.7A CN201810494020A CN108597628B CN 108597628 B CN108597628 B CN 108597628B CN 201810494020 A CN201810494020 A CN 201810494020A CN 108597628 B CN108597628 B CN 108597628B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/06—Magazines for holding fuel elements or control elements
- G21C19/07—Storage racks; Storage pools
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/32—Apparatus for removing radioactive objects or materials from the reactor discharge area, e.g. to a storage place; Apparatus for handling radioactive objects or materials within a storage place or removing them therefrom
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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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- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The present invention relates to the fields of million kilowatt nuclear power station core supplement heat rejecter water, provide a kind of radiation protection method for Spent Fuel Pool dilatation, include the following steps, first against the first screen work, its radiation intensity are measured and are marked；Secondly size of the resulting numerical value respectively with the first preset value and the second preset value will be measured to judge；The first fence operation, the second fence operation or third fence operation are executed to the first screen work respectively by judging result, while following ALARA principle, radiation intensity classification and radiation protection corresponding with radiation intensity level processing are carried out to the first screen work, significantly reduce the radioactivity of the first screen work, and operating efficiency is high, implementation is strong, convenient for carrying out transport and aftertreatment technology to the first screen work, the program has filled up the blank that old screen work in domestic and international Spent Fuel Pool dilatation operation removes technique, has certain reference value and landmark meaning.
Description
Technical field
The present invention relates to the technical fields of million kilowatt nuclear power station core supplement heat rejecter water, specifically, being to be related to one kind
Radiation protection method for Spent Fuel Pool dilatation.
Background technique
Spentnuclear fuel refers to through overshoot irradiation, used nuclear fuel, is generated by the nuclear reactor of nuclear power station.Core is anti-
Include a large amount of radioactive elements in nuclear fuel after answering heap to react, therefore there are a large amount of radioactivity, if do not located properly
Reason, can seriously affect the health of environment with the personnel for contacting them.Therefore via the weary combustion after the nuclear reactor reaction of nuclear power station
Material needs to store many decades in Spent Fuel Pool, until its radioactivity is reduced to and can carry out the subsequent post-processing to spentnuclear fuel
When technique.With domestic nuclear power be increasing and the lasting operation of nuclear power station, most domestic nuclear power station is weary at present
The old screen work of fuel pit screen work completely holds, and it is impossible to meet the need of spentnuclear fuel storage inside nuclear power station for existing container
It asks, therefore Spent Fuel Pool must expand Spent Fuel Pool storage capacity by transformation, guarantee the normal production in nuclear power station.
When carrying out Spent Fuel Pool dilatation operation, it is necessary first to first remove the old screen work inside Spent Fuel Pool, In
It needs first to transport the spentnuclear fuel inside old screen work to external storage before carrying out old screen work dismounting, but the weary combustion inside old screen work
The radioactivity of material is not reduced to emittance value needed for can transporting and carrying out the aftertreatment technology of subsequent spentnuclear fuel generally, therefore
Transport and storage to spentnuclear fuel bring great difficulty.
It after spentnuclear fuel empties, needs to remove old screen work, the dismounting of old screen work is at home and abroad to carry out for the first time, old lattice
Frame is soaked in the inside with radioactive pond due to being used to store spentnuclear fuel for a long time, therefore with a large amount of on old screen work
Radioactivity, staff can not directly close to old screen work and touching, staff can not slip into association inside weary pond
The operation for lifting old screen work is helped and observed, also brings great difficulty to entire work, in the installation of the old screen work of new screen work,
Due to also containing radioactive substance in pond, installation difficulty is also very big.
As a result, when carrying out Spent Fuel Pool dilatation operation, develop it is a kind of convenient for it is manned, can effectively reduce old lattice
The radioactive completely new old screen work radiation protection technique of frame is to carry out transport to old screen work and post-processing operation seems and very must
It wants.
Summary of the invention
The purpose of the present invention is to provide a kind of radiation protection methods for Spent Fuel Pool dilatation, it is intended to solve existing
In technology when carrying out Spent Fuel Pool dilatation operation, causes it to be not easy to transport since old screen work radioactivity is higher, post-processes work
The technical issues of skill performance difficulty.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of spoke for Spent Fuel Pool dilatation is provided
Penetrate means of defence, comprising the following steps: A) one first screen work is provided, the radiation intensity of first screen work is measured and marked
Note；B) radiation intensity of measurement and the first preset value and the second preset value are compared respectively；And C) if the radiation of measurement is strong
Degree is not more than first preset value, then executes the first fence operation to first screen work；If the radiation intensity of measurement is greater than
First preset value and be not more than second preset value, then to first screen work execute the second fence operation；If measurement
Radiation intensity be greater than second preset value, then to first screen work execute third fence operation.
Further, the step A) in, first screen work has multiple for accommodating the chamber of spentnuclear fuel, measurement institute
The first screen work radiation intensity is stated the following steps are included: a1) multiple measurement points are chosen in each chamber partition respectively, and survey
Measure the rad equivalent dosage rate values of each measurement point；And a2) position to each measurement point and each measurement point
The measured value at place is marked.
Further, multiple chambers are the rectangular fluid chamber with a side opening, and each chamber is indoor more
Longitudinal direction of a measurement point respectively from the bottom surface of the chamber along the chamber is successively equidistantly selected to the opening
It takes.
Further, the indoor multiple measurement points of each chamber are four, between the two neighboring measurement point
Away from for 800mm~1200mm.
Further, the step a2) in, the measured value of each measurement point is carried out with third preset value respectively pair
Than, if the measured value of a certain measurement point is greater than the third preset value, position and measured value to the measurement point into
Line flag；If the measured value of a certain measurement point is not more than the third preset value, not to the position of the measurement point and
Measured value is marked.
Further, the step C) in, when the measured value of all measurement points in first screen work is no more than described
When the first preset value, first fence operation is the following steps are included: C11) by first screen work from the Spent Fuel Pool
It is moved in the preparation well being located near the Spent Fuel Pool；And C12) outer surface flushing waterborne is carried out to first screen work
Operation.
Further, the step C) in, when the measured value of at least one measurement point in first screen work is greater than described
First preset value and be not more than second preset value when, second fence operation is the following steps are included: C21) described weary
Underwater flushing operation is carried out to the inner surface of the chamber in fuel pit；C22) again to the rad equivalent of first screen work
Dosage rate values are measured and are marked；And C23) if measuring resulting numerical value again no more than first preset value, by institute
The first screen work is stated from the preparation well that the Spent Fuel Pool is moved near the Spent Fuel Pool, in the preparation well
In outer surface flushing operation waterborne is carried out to first screen work；It is preset if measuring resulting numerical value again and being still greater than described first
It is worth and is not more than second preset value, then moves first screen work from the Spent Fuel Pool except the first pre-determined distance
Out into the preparation well, underwater inner surface flushing operation first is carried out to the chamber of first screen work in the preparation well,
Outer surface flushing operation waterborne then is carried out to first screen work in the preparation well.
Further, the step C) in, when the measured value of at least one measurement point in first screen work is greater than described
When the second preset value, the third fence operation is the following steps are included: C31) in the Spent Fuel Pool to the chamber
Inner surface carries out underwater flushing operation；C32) the rad equivalent dosage rate values of first screen work are measured and marked again
Note；And C33) if measuring resulting numerical value again is not more than second preset value, it will be described except the second pre-determined distance
First screen work is moved in the preparation well near the Spent Fuel Pool from the Spent Fuel Pool；If the numerical value is little
In first preset value, then outer surface flushing operation waterborne is carried out to first screen work in the preparation well；If again
Resulting numerical value is measured greater than first preset value and no more than second preset value, then first in the preparation well to institute
The chamber for stating the first screen work carries out underwater inner surface flushing operation, then carries out water to first screen work in the preparation well
Upper outer surface flushing operation；If measuring resulting numerical value again is still greater than second preset value, according to default emergency plan
Radiation protection processing is carried out to first screen work.
Further, first screen work is moved to from the Spent Fuel Pool includes following step in the preparation well
It is rapid: S11) the first hanging apparatus is fixed on first screen work；S12 first hanging apparatus) is controlled by described first
Screen work promotes the first preset height along the vertical direction；And S13) move to first screen work in the preparation well.
Further, further include following steps, carrying out the step A) before, if step A) in be located at first lattice
It is mounted with spentnuclear fuel in second screen work on frame periphery, the spentnuclear fuel in second screen work is moved to far from first screen work
Empty third screen work in or the loading that is moved to the spentnuclear fuel in second screen work near the Spent Fuel Pool
In well.
Further, the loading well location is between the Spent Fuel Pool and the preparation well.
Further, further include following steps, carrying out the step C) after, S21) the second hanging apparatus is fixed on
Step C) in the first screen work on；S22 it) controls second hanging apparatus and first screen work is promoted second along the vertical direction
Preset height；And S23) move to first screen work on delivery vehicle.
Further, further include following steps, carrying out the step S23) before, the first screen work in step S22)
Upper installation, to reduce the turnover device of its vertical height, and passes through the turnover device and described for overturning first screen work
The cooperation of second hanging apparatus overturns first screen work on the delivery vehicle into step S23).
Further, the first plastic cloth is equipped on the delivery vehicle, first plastic cloth is equipped with blotting paper；Institute
The pallet being additionally provided on the first plastic cloth for water receiving is stated, the pallet is equipped with corresponding with the turnover device and is used to turn over
Turn and support the sleeper of first screen work.
A kind of beneficial effect of radiation protection method for Spent Fuel Pool dilatation provided by the invention is: with it is existing
Technology comparison, a kind of radiation protection method for Spent Fuel Pool dilatation proposed by the present invention, i.e., first against one first lattice
Frame is measured and is marked to its radiation intensity；Secondly resulting numerical value will be measured to preset with the first preset value and second respectively
The size of value is judged；The first fence operation, the second fence operation or the are executed to the first screen work respectively by judging result
Three fence operations are following ALARA (as low as reasonably achievable, optimization of radiation protection) principle
Meanwhile it is anti-to the first screen work (one of them old screen work) progress radiation intensity classification and radiation corresponding with radiation intensity level
Shield processing significantly reduces the radioactivity of the first screen work, and operating efficiency is high, and implementation is strong, convenient for carrying out to the first screen work
Transport and aftertreatment technology, the program have filled up the blank that domestic and international old screen work removes technique, have had certain reference value
With landmark meaning.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the schematic top plan view of Spent Fuel Pool provided in an embodiment of the present invention；
Fig. 2 is the stereoscopic schematic diagram of the first screen work provided in an embodiment of the present invention；
The floor map that Fig. 3 is Spent Fuel Pool provided in an embodiment of the present invention, loads well, prepares well；
Fig. 4 is the stereoscopic schematic diagram of the second hanging apparatus provided in an embodiment of the present invention；
Fig. 5 is the stereoscopic schematic diagram of delivery vehicle provided in an embodiment of the present invention.
Wherein, each appended drawing reference in figure:
1: the first screen work 10: chamber
11: opening 12: measurement point
2: the second screen works 3: third screen work
4: preparing well 5: loading well
6: 7: the first hanging apparatus of Spent Fuel Pool
8: the second hanging apparatus 9: delivery vehicle
91: pallet 92: sleeper
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.
It is to be appreciated that term " length ", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outside" etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term should broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
It as shown in Figures 1 to 5, is a preferred embodiment provided by the invention.
A kind of radiation protection method for 6 dilatation of Spent Fuel Pool provided in this embodiment, comprising the following steps:
A) one first screen work 1 is provided, the radiation intensity of the first screen work 1 is measured and marked；
B) radiation intensity of measurement and the first preset value and the second preset value are compared respectively；
C) if the radiation intensity of measurement is not more than the first preset value, the first fence operation is executed to the first screen work 1；
If the radiation intensity of measurement is greater than the first preset value and is not more than the second preset value, the is executed to the first screen work 1
Two fence operations；
If the radiation intensity of measurement is greater than the second preset value, third fence operation is executed to the first screen work 1.
It should be noted that the first preset value in the present embodiment is chosen as 2mSv/h (milli west not/hour), second is pre-
If value is chosen as 10mSv/h, certainly, other numerical value can also be selected default as the first preset value or second according to the actual situation
Value, does not limit uniquely herein.
ALARA principle is also referred to as three principle of radiation protection comprising justification, optimization of radiation protection, a is practiced in radiation
People's dose equivalent limit, referring to will weigh the advantages and disadvantages before implementing any practice with radiation irradiation by sufficiently demonstration；Only
When the cost for having society's total benefit brought by this to be greater than to be paid for it, it is proper for just thinking that this practices.
This programme carries out radiation intensity classification and corresponding with radiation intensity level while following ALARA principle, to the first screen work 1
Radiation protection processing, significantly reduce the radioactivity of the first screen work 1, and operating efficiency is high, implementation is strong, convenient for first
Screen work 1 carries out transport and aftertreatment technology；The program has filled up the blank that domestic and international old screen work removes technique, has centainly
Reference value and landmark meaning.
In one embodiment of the invention, referring to Fig. 2, step A) in, the first screen work 1 has multiple weary for accommodating
The chamber 10 of fuel, as shown, multiple chambers 10 can arrange in length and breadth, and respectively transversely and longitudinally through capitalization English letter
It is numbered one by one with Arabic numerals, in this way, each chamber 10 can be accurately positioned by the two combination, such as A1
Chamber, B3 chamber etc., and 11 shape of opening of each chamber 10 can be rectangle, certainly, the arrangement mode of multiple chambers 10, number
Mode and 11 shapes of opening can also be other, not limit uniquely herein；
Measure 1 radiation intensity of the first screen work the following steps are included:
A1) multiple measurement points 12 are chosen at interval in each chamber 10 respectively, and the radiation measured at each measurement point 12 is worked as
Dosage rate values are measured, in the present embodiment, using rad equivalent dosage rate values as the radiation intensity measured at each measurement point 12, when
So, if selecting different meter device or there is the reason of such as required precision, the radiation intensity at each measurement point 12 be can also be used
Other indexs are measured, therefore, measuring the rad equivalent dosage rate values at each measurement point 12 herein is only preferred reality of the invention
Apply example, no restriction effect；Specifically, please continue to refer to Fig. 2, multiple chambers 10 are the rectangular body cavity with a side opening 11
Room, multiple measurement points 12 in each chamber 10 respectively from the bottom surface of chamber 10 along chamber 10 longitudinal direction at opening 11 according to
Secondary equidistant selection；Further, in the A1 chamber of the present embodiment, longitudinal direction is the vertical direction in figure, wherein
The indoor multiple measurement points 12 of A1 chamber are specially four, and first measurement point 12 is located at the bottom surface of the chamber 10, then along vertical
Upwardly direction successively its excess-three measurement point 12 of spaced set, and the spacing for limiting two neighboring measurement point 12 (please refers to
H in Fig. 2) it is 800mm~1200mm, herein preferably 1000mm.
A2) measured value at the position to each measurement point 12 and each measurement point 12 is marked；Specifically, step a2)
In, the measured value at each measurement point 12 can be compared with third preset value respectively, if the measured value at a certain measurement point 12
Greater than third preset value, then the position and measured value of the measurement point 12 are marked；If the measured value at a certain measurement point 12
No more than third preset value, then the position and measured value of the measurement point 12 are not marked；Specifically, third preset value can be set
It is set to 0.5mSv/h~1mSv/h, herein preferably 1mSv/h；Instrument, tool used by being marked in the step, and it is specific
Mark pattern do not limit uniquely herein；By carrying out the label of selectivity to measurement result, spoke on entire screen work may make
It is very clear to penetrate the higher position of intensity, while improving labeling effciency, is established for subsequent screen work radiation protection operation
Good basis.
Further, step C) in, referring to Fig. 3, in the first screen work 1 all measurement points 12 measured value no more than
When the first preset value, i.e., when 12 measured value of all measurement points of chamber 10 each in the first screen work 1, which is respectively less than, is equal to 2mSv/h,
First fence operation is the following steps are included: C11) first the first screen work 1 is moved to from Spent Fuel Pool 6 positioned at Spent Fuel Pool 6
In neighbouring preparation well 4, C12) and then outer surface flushing operation waterborne is carried out to the first screen work 1.
It should be noted that in the present embodiment, outer surface flushing operation waterborne passes through specific outer surface and rinses dress
It sets and the outer wall surface of the first screen work 1 is rushed with SED demineralized water (i.e. demineralized water used in nuclear island desalination water distribution system)
It washes, without rinsing 10 inner surface of chamber of the first screen work 1, while realizing the protection of 1 external radiation of the first screen work, is promoted
Working efficiency.
Further, step C) in, when the measured value of at least one measurement point 12 in the first screen work 1 is greater than the first preset value
And be not more than the second preset value when, the second fence operation the following steps are included:
C21 underwater flushing operation) is carried out to the inner surface of chamber 10 in Spent Fuel Pool 6, it is preferable that without to first
10 inner surface of all chambers of screen work 1 carries out underwater flushing operation, can in Spent Fuel Pool 6 to at least one above-mentioned measurement
The inner surface of 12 corresponding chambers 10 of point carries out underwater flushing operation, further, can also be greater than first to above-mentioned measured value
Preset value and there is targetedly underwater flushing operation no more than what is concentrated at each measurement point 12 of the second preset value, this
Place does not limit uniquely；
C22) the rad equivalent dosage rate values of the first screen work 1 are measured and marked again, optionally, without right again
All chambers 10 of first screen work 1 carry out re-measuring label, only can carry out repetition measurement mark at least one above-mentioned measurement point 12
Note, does not limit uniquely herein；
C23) if measuring resulting numerical value again no more than the first preset value, the first screen work 1 is moved from Spent Fuel Pool 6
Out into the preparation well 4 being located near Spent Fuel Pool 6, outer surface waterborne is carried out to the first screen work 1 in preparing well 4 and rinses behaviour
Make；
If measuring resulting numerical value again is still greater than the first preset value and no more than the second preset value, first it is default away from
The first screen work 1 is moved to from Spent Fuel Pool 6 from except and is prepared in well 4, first to the chamber of the first screen work 1 in preparing well 4
10 carry out underwater inner surface flushing operation, then carry out outer surface flushing operation waterborne to the first screen work 1 in preparing well 4, this
First pre-determined distance at place is a preset safe distance value, i.e. operator need to remotely control the first screen work 1, from
And it is avoided to be injured due to by the radio exposure for exceeding dose limit, it ensure that the personal safety of operator；Specifically
Ground, the first pre-determined distance size can be configured and adjust according to equipment scale size or practical operation situation, not make herein only
One limits；
It should be noted that in the present embodiment, underwater flushing operation pass through it is specific it is underwater rinse decontamination plant and
SED demineralized water is rinsed 10 inner wall of chamber of the first screen work 1, with remove in chamber 10 it is loose stain, to realize the
Radiation protection inside one screen work, 1 chamber 10.
Further, step C) in, when the measured value of at least one measurement point 12 in the first screen work 1 is greater than the second preset value
When, third fence operation the following steps are included:
C31 underwater flushing operation) is carried out to the inner surface of chamber 10 in Spent Fuel Pool 6, it is similar with C21), specifically
Flush position does not limit uniquely herein；
C32) the rad equivalent dosage rate values of the first screen work 1 are measured and marked again, it is similar with C22), specifically
The position of repetition measurement and label does not also limit uniquely herein；
C33) if measuring resulting numerical value again no more than the second preset value, by the first lattice except the second pre-determined distance
Frame 1 is moved in the preparation well 4 near Spent Fuel Pool 6 from Spent Fuel Pool 6, and the second pre-determined distance herein is another
Preset safe distance range, i.e., operator equally need to remotely control the first screen work 1 at this time, to avoid it because super
Out the radio exposure of dose limit and come to harm, wherein the second pre-determined distance size also can according to practical operation situation and
Equipment scale size is configured and adjusts, the second pre-determined distance may be configured as it is identical as the first pre-determined distance, can also be different, tool
Body does not limit uniquely herein；If numerical value is not more than the first preset value, first screen work 1 is carried out in preparing well 4 waterborne outer
Surface washing operation；If measuring resulting numerical value again greater than the first preset value and no more than the second preset value, first preparing
Underwater inner surface flushing operation is carried out to the chamber 10 of the first screen work 1 in well 4, then first screen work 1 is carried out in preparing well 4
Outer surface flushing operation waterborne；
If measuring resulting numerical value again is still greater than the second preset value, according to preset emergency plan to the first screen work 1 into
Row radiation protection processing.
It should be noted that in the present embodiment, above-mentioned default emergency plan can be following several:
1, without all removing the screen work in Spent Fuel Pool 6 when 6 dilatation of Spent Fuel Pool, thus, if the first screen work 1
Repetition measurement numerical value is still greater than the second preset value, it is contemplated that abandons removing first screen work 1, then removes remaining screen work；
2, underwater inner surface flushing operation is carried out to 1 chamber 10 of the first screen work in Spent Fuel Pool 6, it can also specific aim
Ground rinses measurement numerical value and is still greater than at the measurement point 12 of the second preset value, to reduce the radiation intensity of entire first screen work 1；
3, it in practical operation, needs that bottom plate (i.e. above-mentioned 1 chamber of the first screen work, 10 bottom surface) is arranged in screen work bottom mostly,
And at bottom plate often it is the radiation intensity highest point in the chamber 10, so, using particular jig by the bottom of first screen work 1
Plate removes, and then after reducing its integral radiation intensity, is moved out Spent Fuel Pool 6.
Certainly, other emergency measures are certainly existed according to different practical operation situations, above is the excellent of the present embodiment
Select scheme；By several default emergency plans more than being arranged, operator may make to radiate implementations from actual screen work,
It because of object suiting measures to different conditions, preferentially chooses, while improving 6 dilatation efficiency of Spent Fuel Pool, optimizes screen work radiation protection process flow.
Further, prepare to include following step in well 4 referring to Fig. 3, the first screen work 1 is moved to from Spent Fuel Pool 6
It is rapid: S11) the first hanging apparatus 7 is fixed on the first screen work 1；S12) the first hanging apparatus 7 of control is by the first screen work 1 along perpendicular
Histogram is to promoting the first preset height；S13) the first screen work 1 is moved to and is prepared in well 4.
It should be noted that in the present embodiment, the first above-mentioned hanging apparatus 7 can implement formula of revealing all the details to the first screen work 1
Lifting, it may include the first suspending head component (not shown) for directly being contacted with the first screen work 1 and for promoting first suspending head
First electric hoist (not shown) of component, specific structure do not limit uniquely herein；Above-mentioned first preset height can meet the
One screen work 1 is set as small a, side as far as possible under the premise of not interfered when moved to above preparation well 4 above Spent Fuel Pool 6
The load of the first hanging apparatus 7 is reduced in face, energy saving, and operational safety on the other hand can be improved；The number of first preset height
Value is related to 6 depth value of Spent Fuel Pool, does not limit uniquely herein specifically.
Further, further include following steps, carry out step A) before, if step A) in be located at 1 periphery of the first screen work
The second screen work 2 in be mounted with spentnuclear fuel (not shown), the spentnuclear fuel in the second screen work 2 is moved to far from the first screen work 1
It is moved in the loading well 5 near Spent Fuel Pool 6 in empty third screen work 3 or by the spentnuclear fuel in the second screen work 2, such as
Shown in Fig. 1, if the first screen work 1 is No. 9 screen works, then the second screen work 2 for being located at 1 periphery of the first screen work may include No. 5 in figure,
No. 6, No. 7, No. 8, No. 10, No. B entire screen work and No. 11, No. 12, No. 13 part screen works, i.e., positioned at 1 periphery of the first screen work
Spentnuclear fuel in overstriking wire inner cavity chamber 10 is both needed to be moved in the empty third screen work 3 far from the first screen work 1, third screen work 3
Can not it make herein unique for outer remaining screen work in addition to No. 9 screen works of overstriking wire in figure, such as No. 1, No. 4, No. 16, No. 20 screen works
It limits；Specifically, the setting of well 5 is loaded in Spent Fuel Pool 6 and is prepared between well 4.
Above scheme is on the basis of meeting the requirement of nuclear safety office, by the way that spentnuclear fuel removing method and removal is reasonably arranged
Position is conducive to shorten lifting path, optimizes 6 dilatation process of Spent Fuel Pool, reduce energy consumption.
Further, further include following steps, referring to Fig. 4, carrying out step C) after, S21) by the second hanging apparatus
8 are fixed on step C) in the first screen work 1 on, the second hanging apparatus 8 herein may include being fixed on 1 shell of the first screen work
Second suspending head component (not shown) and the second electric hoist (not shown) for promoting the second suspending head component, the first electric hoist and
Two electric hoists may be configured as same electric hoist, and when specific operation, operator can be by the first suspending head component of the first hanging apparatus 7
The second suspending head component directly is replaced with, to improve operating efficiency；Certainly, the first hanging apparatus 7 and the second hanging apparatus 8 can also
For completely self-contained two devices, the specific structure of device does not limit uniquely herein；S22) the second hanging apparatus 8 of control is by the
One screen work 1 promotes the second preset height along the vertical direction, wherein the second preset height can be with step S12) in the first default height
It is similar to spend setting means, does not repeat herein；S23) the first screen work 1 is moved on delivery vehicle 9, the present embodiment uses flat car
As delivery vehicle 9；Further, further include following steps, carrying out step S23) before, due to spentnuclear fuel workshop door (figure
Do not show) limitation, the first screen work 1 can not be vertically through, thus, need to be in step S22) in the first screen work 1 on installation for turning over
Turn the first screen work 1 to reduce the turnover device of its vertical height, and passes through turnover device and above-mentioned the second hanging apparatus 8 cooperation
By the overturning of the first screen work 1 on the delivery vehicle 9 into step S23), specific turnover device, turnover device and above-mentioned second are hung
8 fit system of assembling device, does not limit uniquely herein.
Further, it referring to Fig. 5, being equipped with the first plastic cloth (not shown) on delivery vehicle 9, is set on the first plastic cloth
There is blotting paper (not shown)；The pallet 91 for water receiving is additionally provided on first plastic cloth, pallet 91 is equipped with and turnover device phase
Sleeper 92 corresponding and for overturning and supporting the first screen work 1；Certainly, it can be also equipped with for wrapping up the first screen work 1 on pallet 91
The second plastic cloth (not shown) or showerproof cloth (not shown)；Preferably, herein the first plastic cloth and the second plastic cloth be
Red plastic cloth.
By structures such as setting blotting paper, pallet 91, showerproof clothes, it can avoid the water after being radiated and transporting the first screen work 1
During splash down everywhere, to cause stained problem, have effectively achieved the radiation during transportation to the first screen work 1
Protection, securely and reliably.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (11)
1. a kind of radiation protection method for Spent Fuel Pool dilatation, comprising the following steps:
A) one first screen work is provided, the radiation intensity of first screen work is measured and marked, first screen work has
Multiple chambers for being used to accommodate spentnuclear fuel；
B) radiation intensity of measurement and the first preset value and the second preset value are compared respectively；With
C) if the radiation intensity of measurement is not more than first preset value, the first fence operation is executed to first screen work；
First fence operation is the following steps are included: C11) first screen work is moved to from the Spent Fuel Pool positioned at described
In preparation well near Spent Fuel Pool；And C12) outer surface flushing operation waterborne is carried out to first screen work；
If the radiation intensity of measurement is greater than first preset value and is not more than second preset value, to first screen work
Execute the second fence operation；Second fence operation is the following steps are included: C21) in the Spent Fuel Pool to the chamber
The inner surface of room carries out underwater flushing operation；C22) the rad equivalent dosage rate values of first screen work are measured again and
Label；And C23) if the rad equivalent dosage rate values measured again are not more than first preset value, by first screen work
It is moved in the preparation well near the Spent Fuel Pool from the Spent Fuel Pool, to described in the preparation well
One screen work carries out outer surface flushing operation waterborne；If the rad equivalent dosage rate values measured again are still greater than first preset value
And be not more than second preset value, then first screen work is removed from the Spent Fuel Pool except the first pre-determined distance
To in the preparation well, underwater inner surface flushing operation first is carried out to the chamber of first screen work in the preparation well, and
Outer surface flushing operation waterborne is carried out to first screen work in the preparation well afterwards；
If the radiation intensity of measurement is greater than second preset value, third fence operation is executed to first screen work；It is described
Third fence operation is the following steps are included: C31) inner surface of the chamber is rinsed under water in the Spent Fuel Pool
Operation；C32) the rad equivalent dosage rate values of first screen work are measured and marked again；And C33) if measuring again
Rad equivalent dosage rate values be not more than second preset value, then except the second pre-determined distance by first screen work from institute
It states in the preparation well that Spent Fuel Pool is moved near the Spent Fuel Pool；If the rad equivalent dosage rate measured again
Value is not more than first preset value, then carries out outer surface flushing operation waterborne to first screen work in the preparation well；
If the rad equivalent dosage rate values measured again are greater than first preset value and are not more than second preset value, first in institute
It states and prepares to carry out underwater inner surface flushing operation to the chamber of first screen work in well, then to described in the preparation well
First screen work carries out outer surface flushing operation waterborne；If it is default that the rad equivalent dosage rate values measured again are still greater than described second
Value then carries out radiation protection processing to first screen work according to default emergency plan.
2. a kind of radiation protection method for Spent Fuel Pool dilatation according to claim 1, which is characterized in that described
Step A) in, measure the first screen work radiation intensity the following steps are included:
A1 multiple measurement points) are chosen in each chamber partition respectively, and measure the rad equivalent of each measurement point
Dosage rate values；With
A2) measured value of the position to each measurement point and each measurement point is marked.
3. a kind of radiation protection method for Spent Fuel Pool dilatation according to claim 2, which is characterized in that multiple
The chamber is the rectangular fluid chamber with a side opening, and each indoor multiple measurement points of chamber are respectively by described
It is successively equidistantly chosen along the longitudinal direction of the chamber to the opening bottom surface of chamber.
4. a kind of radiation protection method for Spent Fuel Pool dilatation according to claim 3, which is characterized in that each
The indoor multiple measurement points of chamber are four, and the spacing of the two neighboring measurement point is 800mm~1200mm.
5. according to a kind of described in any item radiation protection methods for Spent Fuel Pool dilatation of claim 2~4, feature
It is, the step a2) in, the measured value of each measurement point is compared with third preset value respectively, if a certain institute
The measured value for stating measurement point is greater than the third preset value, then the position of the measurement point and measured value is marked；If certain
The measured value of one measurement point is not more than the third preset value, then does not mark to the position of the measurement point and measured value
Note.
6. a kind of radiation protection method for Spent Fuel Pool dilatation according to claim 1, which is characterized in that by institute
State the first screen work be moved in the preparation well from the Spent Fuel Pool the following steps are included:
S11) the first hanging apparatus is fixed on first screen work；
S12 it) controls first hanging apparatus and first screen work is promoted into the first preset height along the vertical direction；With
S13) first screen work is moved in the preparation well.
7. a kind of radiation protection method for Spent Fuel Pool dilatation according to claim 6, which is characterized in that also wrap
Include following steps, carrying out the step A) before, if step A) in be located in second screen work on first screen work periphery and fill
It is loaded with spentnuclear fuel, the spentnuclear fuel in second screen work is moved in the empty third screen work far from first screen work or is incited somebody to action
Spentnuclear fuel in second screen work is moved in the loading well near the Spent Fuel Pool.
8. a kind of radiation protection method for Spent Fuel Pool dilatation according to claim 7, which is characterized in that described
Well location is loaded between the Spent Fuel Pool and the preparation well.
9. a kind of radiation protection method for Spent Fuel Pool dilatation according to claim 7 or 8, which is characterized in that
Further include following steps, carrying out the step C) after,
S21 the second hanging apparatus) is fixed on step C) in the first screen work on；
S22 it) controls second hanging apparatus and first screen work is promoted into the second preset height along the vertical direction；With
S23) first screen work is moved on delivery vehicle.
10. a kind of radiation protection method for Spent Fuel Pool dilatation according to claim 9, which is characterized in that also
Include the following steps, carrying out the step S23) before, installation is described for overturning on the first screen work in step S22)
First screen work passes through the cooperation of the turnover device and second hanging apparatus to reduce the turnover device of its vertical height
First screen work is overturn on the delivery vehicle into step S23).
11. a kind of radiation protection method for Spent Fuel Pool dilatation according to claim 10, which is characterized in that institute
It states and is equipped with the first plastic cloth on delivery vehicle, first plastic cloth is equipped with blotting paper；It is also set on first plastic cloth
There is the pallet for water receiving, the pallet is equipped with corresponding with the turnover device and is used to overturning and supporting first lattice
The sleeper of frame.
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| CN107476555A (en) * | 2017-07-25 | 2017-12-15 | 广东核电合营有限公司 | A kind of fuel for nuclear power plant factory building service sink workbench and its installation method |
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| US3894327A (en) * | 1973-10-23 | 1975-07-15 | Babcock & Wilcox Co | Industrial technique |
| CN102945686B (en) * | 2012-11-02 | 2016-12-21 | 中国核电工程有限公司 | A kind of Spent Fuel Pool state continuous monitoring method and system |
| CN105304149B (en) * | 2015-09-30 | 2017-05-17 | 大亚湾核电运营管理有限责任公司 | Alpha contamination measurement flow in overhaul process of fuel defective unit of mega-kilowatt nuclear power plant |
| CN105355240B (en) * | 2015-10-14 | 2017-06-20 | 上海核工程研究设计院 | A kind of simulated fuel assembly for irradiating |
| CN106229020A (en) * | 2016-08-26 | 2016-12-14 | 上海核工程研究设计院 | A kind of Spent Fuel Pool expansion method |
| CN107919178A (en) * | 2016-10-10 | 2018-04-17 | 广东核电合营有限公司 | A kind of nuclear power plant's Radwastes treatment method and system |
| CN107767982A (en) * | 2017-10-25 | 2018-03-06 | 沈阳中科腐蚀控制工程技术有限公司 | A kind of online washer of nuclear power facility primary Ioops radioactive pollution and method |
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