JPH09189797A - Radioactive waste liquid treatment facility - Google Patents

Abstract

(57) [Abstract] [Problem] To reduce the amount of equipment by automating the work and giving the operation a time margin. SOLUTION: A waste liquid receiving container 3 to which waste liquid receiving pipes 1 and 2 are connected is connected to a waste liquid processing device 4 via an inlet pipe 10, and a waste liquid flow path is switched downstream of the waste liquid processing device 4 via an outlet pipe 9. Connect the device 8. One of the downstream sides of the waste liquid flow path switching device 8 is connected to the condensate storage container 5 via the transfer pipe 7, and the other is connected to the waste liquid receiving container 3 via the return pipe 6. The outlet pipe 9 is provided with a periodic sampling device 13 and a continuous sampling device 14, and these devices 13 and 14 are connected to the automatic water quality analyzer 11. The automatic water quality analyzer 11 has a measuring unit 15 and a diagnostic unit 16, and the signal of the diagnostic unit 16 is transmitted to the waste liquid flow path switching device 8. The waste liquid treatment device 4 is a hollow fiber membrane filter 4
a and an ion exchange resin tower 4b.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a radioactive waste liquid treatment facility for treating radioactive waste liquid generated in a nuclear power plant or the like.

[0002]

2. Description of the Related Art As is well known in the art, the waste liquid generated from a nuclear power plant is composed of a radioactive waste liquid, a low-conductivity waste liquid (LCW) and a high-conductivity waste liquid (HCW), and usually a radioactive substance. It is roughly classified into laundry waste liquid (LD) and shower waste liquid (HSD) which are not included but are managed and treated because they are generated in the nuclear power plant, and storm waste liquid (SD) such as non-radioactive condensed water.

Of these, the low-conductivity waste liquid and the high-conductivity waste liquid, which are radioactive waste liquids, are treated as follows. That is, the low-conductivity waste liquid is used for piping, valves, pumps, heat exchangers,
Waste water generated from equipment such as filters, or supernatant water of backwash water of various filters is mainly used. Therefore, since the amount of ionic components is small and the concentration of solids such as iron rust is high, it is common to carry out ion exchange treatment after filtration treatment.

On the other hand, the high-conductivity waste liquid is mainly a floor drain waste liquid in a nuclear power plant, a chemical waste liquid generated from an analysis room, and a chemical waste liquid generated by regenerating an ion exchange resin. Therefore, since the conductivity is high, it is common to perform the ion exchange treatment after the evaporative concentration treatment.

Further, when the hollow fiber membrane filter is used in the filtration treatment of the low-conductivity waste liquid, due to its filtering performance, the floor drain waste liquid in the nuclear power plant, which has a relatively low conductivity among the high-conductivity waste liquids, is reduced. It is also possible to mix and process with the electric conductivity waste liquid.

However, in any of the waste liquid treatments, a plurality of receiving containers for receiving the waste liquid are installed, and when one is full, the waste liquid is switched to another receiving container to receive the waste liquid, while the waste liquid in the full container is filled. Is a so-called batch processing method. The reason for this is that after processing, the water quality in the sump tank is analyzed, evaluated, and processed for each batch by being received by the sump tank or tank.

The water quality analysis method has been carried out by so-called manual analysis in which sample water is directly collected from a sampling point such as a pipe and carried to an analysis room for analysis. In addition, analysis results were diagnosed by analysts and operators. For some water quality analysis items, conductivity and solid content concentration (converted by a turbidimeter), it is known that automatic measurement is performed using a chemical instrument.

[0008]

Since the conventional radioactive waste liquid treatment is batch treatment, the sump tank or tank must be able to receive the treated water after treating the waste liquid stored in the waste liquid receiving container. There is a problem that not only the same capacity as the receiving container is required, but also a spare group is always required.

Further, when the treated waste liquid is collected in the condensate storage container, the quality of the treated water is analyzed by an analyst, so the collection in the condensate storage container is operated at night or on holidays. Since a series of water quality analysis work takes several hours,
There is a problem that some load is applied to the time margin of the waste liquid treatment facility.

Further, when it is attempted to mix the bed drain with the low-conductivity waste liquid, it is expected that the water quality will be slightly different from the water quality of the conventional low-conductivity waste liquid alone, and the water quality analysis of treated water will cover more items than before. There is a problem that the necessity of confirmation increases and the burden on the analyst increases.

The present invention has been made to solve the above problems, and the conventional batch treatment of waste liquid treatment equipment is continuously performed from the treatment to the recovery even when the bed drain is mixed with the low-conductivity waste liquid. The purpose of this is to provide a radioactive waste liquid treatment facility that automates the work carried out by the analysts and operators, has a time margin in terms of operation, and reduces the amount of equipment. To do.

[0012]

The present invention is directed to a waste liquid receiving container, a waste liquid processing device connected to the waste liquid receiving container, a flow path switching device connected to the waste liquid processing device, and a downstream of the flow path switching device. Side water storage container connected via a transfer pipe, a return pipe returning to the waste receiving container, a water quality automatic branching connection from the pipe connecting the waste liquid treatment device and the flow path switching device An analyzer and a signal system path for inputting a diagnostic signal of this water quality automatic analyzer to the flow path switching device, and the waste liquid treatment device comprises a hollow fiber membrane filter and an ion exchange resin tower connected in series. Is characterized by.

In the radioactive waste liquid treatment facility constructed as described above, the insoluble component in the mixed waste liquid of the low-conductivity waste liquid and the bed drain can be efficiently removed by the hollow fiber membrane filter, and the ion exchange resin By combining a treatment device such as a tower capable of removing dissolved components, treated water with stable water quality can be obtained.

After the start of the treatment, the treated water is returned to the waste liquid receiving container for a certain period of time, and during that time, it is confirmed that the water quality control item of the treated water has reached the target value. After that, it is collected in the compound water storage container, but if the treated water quality control item does not reach the target value during collection, the treated water is returned to the waste liquid receiving container.

The above switching is carried out by the automatic water quality analyzer according to the result of periodic or continuous diagnosis of the water quality control items of the treated water flowing through the downstream pipe of the waste liquid treatment device, thereby enabling continuous treatment and recovery. .

The water quality control items include conductivity, pH, solid content concentration, silica concentration, chlorine concentration, COD, boron concentration, TOC, total γ radioactivity concentration, radionuclide concentration, etc. Not only periodic measurement can be performed indirectly but also continuous measurement can be performed.

Therefore, these measuring units are constructed in the automatic water quality analyzer by a combination of piping and valves so that each measuring unit can pass water under a predetermined sample condition and a computer or the like to process the obtained measuring signals. An automatic water quality analyzer can be configured by allowing the data diagnostic device, the data collector, and the data output device to have a predetermined program and storage capacity.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a radioactive liquid waste treatment facility according to the present invention will be described with reference to FIG. In FIG. 1, reference numerals 1 and 2 denote different waste liquid receiving pipes from each system, and these waste liquid receiving pipes 1 and 2 are shown.
Is connected to the waste liquid receiving container 3. The low-conductivity waste liquid flows into the waste liquid receiving container 3 from one waste liquid receiving pipe 1 and the floor drain waste liquid flows from the other waste liquid receiving pipe 2, and both are mixed and collected.

The mixture of the two is not limited to the waste liquid receiving container 3, but may be in the sump tank, the water distribution system pipe or the funnel port before that. Waste liquid receiving pipes 1, 2
Install one or more as a header or inflow pipe for each waste liquid generation source.

An inlet pipe is provided on the downstream side of the waste liquid receiving container 3.
The waste liquid treatment device 4 is connected via 10. The waste liquid treatment device 4 has a hollow fiber membrane filter 4a and an ion exchange resin tower 4b connected in series, and performs a filtering treatment by the hollow fiber membrane filter 4a and an ion exchange treatment by the ion exchange resin tower 4b.

The insoluble component in the waste liquid obtained by mixing the bed drain with the low-conductivity waste liquid by the waste liquid treatment device 4 is caused by the hollow fiber membrane filter 4a, and the dissolved component is the ion exchange resin tower 4
b can be efficiently removed.

One end of an outlet pipe 9 is connected to the downstream side of the waste liquid treatment device 4, and a waste liquid flow path switching device 8 is connected to the other end of the outlet pipe 9. A transfer pipe 7 connected to the condensate storage container 5 installed downstream of the waste liquid flow path switching device 8 and a return pipe 6 connected to the waste liquid receiving container 3 are connected to the waste liquid flow path switching device 8. The waste liquid flow path switching device 8 may be provided with a transfer pipe for returning to the inlet pipe 10 or a transfer pipe for a container for collecting the high-conductivity waste liquid.

The outlet pipe 9 is provided with a periodic sampling device 13 and a continuous sampling device 14 as sampling points for sampling the treated water treated by the waste liquid treatment device 4 regularly or continuously. The samples collected from these devices 13 and 14 are guided to the automatic water quality analyzer 11, and the measurement unit 15 in the device is introduced.
It is temporarily stored by.

The automatic water quality analyzer 11 has a measuring unit 15 and a diagnostic unit 16 built therein, and the measuring unit 15 and the diagnostic unit 16 are electrically connected. The diagnostic unit 16 is provided with a signal path for transmitting a transfer disapproval signal 12 for transferring the treated water to the condensate storage container 5 to the waste liquid flow path switching device 8. Depending on the configuration of the logic circuit in the diagnostic unit 16, the transfer non-permission signal 12 may be a transfer permission signal, a return permission signal to the waste liquid receiving container 3, or a return non-permission signal.

Therefore, in the radioactive waste liquid treatment facility shown in FIG. 1 according to the first embodiment, the waste liquid collected in the waste liquid receiving container 3 through the waste liquid receiving pipe (one or both of 1 or 2) of the radioactive waste liquid. Is a hollow fiber membrane filter 4a
And a waste liquid treatment device 4 comprising an ion exchange resin tower 4b
Is subjected to processing such as filtration and ion exchange with the continuous sampling device 14 provided in the outlet pipe 9 and temporarily stored in the measuring unit 15 in the automatic water quality analyzer 11 and continuously measured. , To the condensate storage container 5 or the waste liquid receiving container 3.

At the start of the treatment, the condition of the treatment equipment is not stable, and it is expected that the target treated water quality cannot be achieved. Therefore, the treated water is returned to the waste liquid receiving container 3 through the return pipe 6 for a certain period of time. Be done. After a certain time, automatic water quality analyzer
When the diagnosis unit 16 of 11 diagnoses that the treated water of the target water quality is obtained, the waste liquid flow path switching device 8 is switched, and the treated water is transferred to the condensate storage container 5 through the transfer pipe 7. It

When the quality of the treated water deteriorates during the treatment,
A transfer non-permission signal 12 is transmitted from the diagnostic unit 16 of the automatic water quality analyzer 11 to the waste liquid flow path switching device 8, and the transfer destination flow path is a waste liquid receiving container 5 or inlet pipe 10 or a container for collecting high conductivity waste liquid. (Not shown).

An automatic water quality analyzer 11 for collected samples
The water quality control items analyzed by means of solid content concentration, silica concentration, chlorine concentration, chemical oxygen demand (COD), boron concentration, organic impurities (TOC), conductivity, p
H, radioactivity concentration, etc. However, some or all of the above items may be used because it depends on the setting conditions of water quality management items that require continuous monitoring and the selection of measuring instruments.

Next, a second embodiment of the radioactive liquid waste treatment facility according to the present invention will be described with reference to FIG. In FIG. 2 according to the second embodiment, the same parts as those in FIG. 1 are designated by the same reference numerals and overlapping description will be omitted.

When the bed drain is mixed with the low-conductivity waste liquid for processing, if the bed drain contains a large amount of organic impurities (hereinafter referred to as TOC), the mixed waste liquid T
It is assumed that the OC concentration also rises as compared with the case of using the low-conductivity waste liquid alone.

As the treatment of the TOC-containing waste liquid, in the waste liquid treatment device 4 connected to the inlet pipe 10 connected to the waste liquid receiving container 3 shown in FIG. 1, in the second embodiment, as shown in FIG.
As shown in, the hollow fiber membrane filter 4a, the TOC removal device 4c, and the ion exchange resin tower 4b are connected in series.
Then, a filtration process by the hollow fiber membrane filter 4a, an ion exchange process by the ion exchange resin tower 4b, and a TOC removal process by the TOC removal device 4c are performed.

The hollow fiber membrane filter 4a, TOC removing device 4c and the ion exchange resin tower 4b may be combined and arranged in any order, but as shown in FIG. 2, the hollow fiber membrane filter 4a, TOC removing device may be arranged from the upstream side. 4c and the ion exchange resin tower 4b are effective.

The hollow fiber membrane filter 4a removes 99% or more of the solid content, and the TOC removing device 4c removes T in the waste liquid.
The decomposition or removal of OC can be effectively performed. It is possible to remove the ionic component in the waste liquid or the ionic component formed by decomposing TOC by the ion exchange resin tower 4b further downstream.

However, according to the radioactive waste liquid treatment facility of this embodiment, filtration, ion exchange and TOC removal are performed by the waste liquid treatment device 4 including the hollow fiber membrane filter 4a and the ion exchange resin tower 4b and the TOC removal device 4c. As a result, the waste liquid obtained by mixing the floor drain with the low-conductivity waste liquid can be effectively treated.

As the TOC removing device 4c, a type that oxidizes and decomposes TOC in a high temperature pressurized wet type / ultraviolet irradiation / high temperature incinerator or a type that removes TOC by a reverse osmosis membrane can be appropriately selected and used. It is possible.

Next, a third embodiment of the radioactive waste liquid treatment facility according to the present invention will be described with reference to FIG. In the third embodiment, in FIG. 3, the same parts as those in FIG. 1 are designated by the same reference numerals, and the description of the overlapping parts will be omitted.

The automatic water quality analyzer 11a comprises at least one measuring unit 15 and at least one computer. , This computer is a measuring unit
An input unit 17 for receiving signals from 15, a diagnostic unit 16 for diagnosing and evaluating measured values, a storage unit 18 for storing and holding these data, a processing unit 19 for performing medium / long-term systematic calculation of data, and measurement It is composed of an output unit 20 for displaying and outputting data and diagnostic results and outputting necessary data stored so far to a diagnostic unit.

The outlet pipe 9 connected to the waste liquid treatment device 4 is provided with a periodic sampling device 13 and a continuous sampling device 14,
The samples collected from these are guided to the automatic water quality analyzer 11a and analyzed for water quality. The installation positions of the periodic sampling device 13 and the continuous sampling device 14 may be either upstream with respect to the flow direction of the treated water.

In the radioactive waste liquid treatment facility shown in FIG. 3 having such a structure, the samples collected from the periodic sampling device 13 and the continuous sampling device 14 provided in the outlet pipe 9 are:
It is temporarily stored in the measuring unit 15 in the automatic water quality analyzer 11a and then measured periodically or continuously.

Here, the water quality analysis from the periodic sampling device 13 will be described. When the frequency of sampling the sample from the periodic sampling device 13 is once a day, for example, the measurement frequency of the automatic water quality analyzer 11a is as follows: Once a day. After the water quality analysis, the total amount of the stored sample will be replaced with the newly collected sample. This water quality analysis value is regarded as the representative value of the treated water quality for one day until the next water quality analysis.

Further, assuming that the capacity for storing the sample in the measuring unit 15 is 7 times of sampling, the measuring frequency is once every 7 days. When a new sample is collected next time, all of the stored samples will be discarded, and after 7 days, all will be full again and water quality analysis will be possible. This water quality analysis value is regarded as a representative value of treated water quality for one week until the next water quality analysis.

When the volume for storing the sample is set to seven samplings, the measurement frequency can be set to once a day. If the volume replaced by a new sample is one-seventh of the total, one-seventh of the maximum storage time is always replaced by a new sample. This water quality analysis value is regarded as a representative value of treated water quality for one week.

The sampling frequency may be set within a range in which the tendency of changes in treated water quality can be grasped, and may be once every several tens of seconds or once every several months depending on the target water quality analysis item. The water quality analysis method of is applicable.

Next, the water quality analysis from the continuous sampling device 14 will be described. Assuming that the volume for storing the sample in the measuring unit 15 is V and the flow rate of the sample collected from the continuous sampling device 14 is Q, the time H during which the sample is stored in the measuring unit 15 is H = V / Q. Become.

The sample measured by the automatic water quality analyzer 11 is
During time H all is replaced. If the measurement frequency is set to time H, water quality analysis will be performed every time H.
This water quality analysis value is regarded as a representative value of the treated water quality for the time H until the next water quality analysis. The measurement frequency may be set within the time H, and the water quality analysis of all the collected samples including duplication will be performed.

The sampling frequency may be set within a range in which the tendency of changes in treated water quality can be grasped. Depending on the target water quality analysis item, it may be once every several tens of seconds or once every several months. Water quality analysis method is applicable. Further, when the measurement unit 15 is capable of continuous measurement, the concept of the measurement frequency is not necessary, and it is possible to always analyze the water quality of all the collected samples.

The water quality control items analyzed by the automatic water quality analyzer 11a for the sample collected from the periodic sampler 13 include solid content concentration, silica concentration, chlorine concentration, CO
D, boron concentration, TOC, etc., continuous sampling device 14
The water quality control items analyzed by the automatic water quality analyzer 11 with respect to the sample collected from are generally conductivity, pH, radioactivity concentration and the like from the respective measurement principles.

However, since the combination depends on the setting conditions of the water quality control items requiring continuous monitoring and the water quality control items sufficient for regular monitoring and the selection of measuring instruments, some or all of the above items may be replaced. .

Then, the representative value of the water quality measured by the measuring unit 15 is sent to the diagnostic unit 16 for diagnosing and evaluating the measured value and the storage unit 18 for storing and holding these data via the input unit 17. These data are used for medium / long-term system calculation by the processing unit 19, display and output of measurement data and diagnostic results by the output unit 20, and output necessary data stored so far to the diagnostic unit.

Next, a fourth embodiment of the radioactive liquid waste treatment facility according to the present invention will be described with reference to FIG. In FIG. 4 of the fourth embodiment, the same parts as those in FIG.

The measuring unit 15 has an adjusting valve 24 for adjusting the flow rate and pressure conditions in addition to the measuring device according to the measuring condition of each water quality control item. Depending on the measurement principle, a desuperheater, a warmer, an incubator for adjusting temperature conditions,
It is configured by connecting a reagent supply container for adjusting chemical conditions, a pump, a removal filter, an attached instrument, electrical parts, etc. by piping and wiring.

In the measurement unit 15, reference numeral 21a is a conductivity meter unit, 21b is a pH meter unit, 21c is a turbidity meter unit, 21d is a fine particle counter unit, 21e is a silica meter unit, 21f is a TOC meter unit, and 21g is A chlorine meter unit, 21h is a COD meter unit, 22a is a NaI scintillation detector unit, 22b is a continuous analysis type Ge semiconductor detector unit, 23 is a measuring instrument, and 24 is a regulating valve.

The measurement result of the measurement unit 15 is diagnosed and evaluated by the diagnosis unit 16 based on the water quality reference value. Then, the measurement data is stored and held by the storage unit 18, and is systematically processed by the processing unit 19.

Further, based on the measurement results of the continuous measurement unit corresponding to some of the water quality management items, items that are not directly measured indirectly due to water chemical correlation, and items that are regularly measured. Can be continuously evaluated. As a result, all the water quality management items can be diagnosed and evaluated by the diagnostic unit 16.

As a specific example, it is conceivable to evaluate the upper and lower sides of the relevant dissolved component with respect to the water quality control standard value from the continuous measurement result of the electrical conductivity, the periodic measurement result of the dissolved component such as chlorine concentration and the conductivity contribution rate.

These measurement data are stored and retained by the storage unit 18, and are systematically processed by the processing unit 19. If the diagnosis result is good, a signal for permitting reuse of the treated water is sent to the waste liquid flow path switching device 8, and if the result is poor, a transfer disapproval signal 12 is sent to the waste liquid flow path switching device 8.
The automatic water quality analyzer 11a performs self-abnormality diagnosis based on the measured storage data, and also holds, records, and statistically processes the water quality collection data.

Next, a fifth embodiment of the radioactive waste liquid treatment facility according to the present invention will be described with reference to FIGS. 5 and 6. In the fifth embodiment, in FIG. 5, the same parts as those in FIG. 1 are designated by the same reference numerals, and the description of the overlapping parts will be omitted.

The point of difference of the fifth embodiment from the first embodiment is that the input unit 17, the storage unit 18 and the processing unit 19 are incorporated as a computer of the automatic analyzer 11b. That is, the automatic analyzer 11b inputs the signal from the measurement unit 15 to the storage unit 18 and the processing unit 19, and the signal of the processing unit 19 is input to the diagnostic unit.
I'm trying to type in 16. Further, a measuring instrument 23 is provided in the condensate storage container 5, and the signal of this measuring instrument 23 is used for the diagnostic unit 16
To be entered.

First, referring to FIG. 5, as a diagnosis method in the diagnosis unit 16, an example in which the judgment reference value (C0) is C0 ≦ A0 with respect to the water quality control reference value (A0) will be described.
In this case, if K1 ≦ C0 from the vertical relationship between the measurement value K1 measured by the measuring unit 15 and the judgment reference value C0, a permission signal for reusing the treated water is transmitted to the waste liquid flow path switching device 8 and K1> C0. If so, the transfer disapproval signal 12 is transmitted to the waste liquid flow path switching device 8.

Further, as a diagnosis method in the diagnosis unit 16, the water quality value in the condensate storage container 5 is the water quality control reference value A.
It is also possible to satisfy the judgment reference value C0 of C0 ≦ A0 for 0. That is, when the water quality measurement value in the condensate storage container 5 storing the condensate having the volume V0 is P0, the treated water of the volume V1 having the measurement value K1 by the measuring unit 15 is collected in the condensate storage container 5. Then, the water quality value P1 in the condensate storage container 5 is P1 = (P0V0 + K1V1) /
It is given by (V0 + V1).

From the vertical relationship between the water quality value P1 and the judgment reference value C0, if P1≤C0, a permission signal for reusing the treated water is sent to the waste liquid flow path switching device 8, and if K1> C0, no transfer is possible. The permission signal 12 is transmitted to the waste liquid flow path switching device 8.

In the continuous measurement, the measured value K
Since 1 is constantly fluctuating, it is necessary to constantly calculate the water quality value P1 in the processing unit 19 in accordance with the fluctuation of the measured value K1. V0 at this time is the condensate capacity at the specified time,
V1 may be the amount of treated water transferred per designated time, and K1 may be a representative value within the designated time.

Further, the water quality value in the condensate storage container 5 may be continuously measured, but it is rational to correct the measured value with the measured value by periodical measurement. Furthermore, for the purpose of pre-detection of water quality deterioration signs, post-analysis of water quality change tendency, and failure detection of the measurement unit 15, the rate of change of data (data difference per unit time) from each water quality measurement unit is continuously measured. Further, the diagnostic unit 16 can have a function of comparing with respect to an arbitrary set time width.

In order to form these functions, it is necessary to accumulate continuous data of the measurement unit 15 in a normal state as comparison data, perform systematic processing by the processing unit 19, and then hold it in the storage unit 18. is there.

Next, the method for measuring the radioactivity concentration is shown in FIG.
This will be described below. FIG. 6 shows the periodic sampling device in FIG.
Only 13 and the measuring instrument 23 are deleted, and there is almost no difference in configuration from FIG.

Conventionally, in the analysis of the radioactivity concentration of the treated water collected in the condensate storage container 5, it is general to measure the gross γ radioactivity concentration by the NaI scintillation detector in the analysis room. Radiation from the same sample was accumulated for about 15 to 20 minutes, and the detection limit was on the order of 10 ^-3 .

In the present invention, in order to achieve the detection limit equal to or lower than the conventional one, the radiation of the sample sequentially collected and updated from the continuous sampling device 14 is NaI which is one of the measuring units 15 in the automatic water quality analyzer 11. The value detected by the scintillation detector is stored in the storage unit 18, and the processing unit
According to 19, the average radioactivity concentration is calculated by integrating for 15 to 20 minutes. By updating the cumulative time zone as the processing time elapses, it becomes possible to always diagnose the latest radioactivity concentration for 15 to 20 minutes by the diagnostic unit 16.

At the start of waste liquid treatment, the waste liquid flow path switching device 8 selects the return pipe 6 side during the so-called initial circulation operation (15 to 20 minutes) until the performance of the treatment device is stabilized. Therefore,
By measuring the radioactivity concentration from the start of the initial circulation, it is possible to monitor the radioactivity concentration of the treated water below the detection limit of the past without time delay from the start of the treatment operation after the initial circulation operation. Becomes

Further, the measurement of radioactivity concentration is carried out by Na
In addition to the I scintillation detector, a continuous analysis Ge semiconductor detector can also be used. In that case, the radioactivity integration time may be set appropriately according to the detection limit.

[0070]

EFFECTS OF THE INVENTION According to the present invention, a series of operations from the treatment to collection of the waste fluid collected by mixing the floor drain with the low-conductivity waste fluid by the automatic diagnosis of the automatic water quality analyzer without temporary storage. Since it can be automated and continuously processed, and the waste liquid treatment equipment can be smoothly operated, a time margin can be provided and the amount of equipment can be reduced.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a first embodiment of a radioactive liquid waste treatment facility according to the present invention.

FIG. 2 is a system diagram showing a second embodiment of a radioactive liquid waste treatment facility according to the present invention.

FIG. 3 is a system diagram showing a third embodiment of a radioactive liquid waste treatment facility according to the present invention.

FIG. 4 is a system diagram showing a fourth embodiment of a radioactive liquid waste treatment facility according to the present invention.

FIG. 5 is a system diagram showing a fifth embodiment of a radioactive liquid waste treatment facility according to the present invention.

FIG. 6 is a system diagram showing a radioactivity concentration measuring means in FIG.

[Explanation of symbols]

1 ... First waste liquid receiving pipe, 2 ... Second waste liquid receiving pipe, 3
... waste liquid receiving container, 4 ... waste liquid processing device, 4a ... hollow fiber membrane filter, 4b ... ion exchange resin tower, 4c ... TOC removing device, 5 ... condensate storage container, 6 ... return pipe, 7 ... transfer pipe,
8 ... Waste liquid flow path switching device, 9 ... Outlet pipe, 10 ... Inlet pipe,
11, 11a, 11b ... Automatic water quality analyzer, 12 ... Transmission non-permission signal, 13 ... Regular sampling device, 14 ... Continuous sampling device, 15
... Measuring unit, 16 ... Diagnostic unit, 17 ... Input unit, 18 ... Storage unit, 19 ... Processing unit, 20 ... Output unit, 21a ... Conductivity meter unit, 21b ... pH meter unit, 21c ... Turbidity meter unit, 21d ... Particle counter unit, 21e ... Silica meter unit, 21f ... TOC meter unit, 21g ... Chlorine meter unit, 21h ... COD meter unit,
22a ... NaI scintillation detector unit, 22b ...
Continuous analysis type Ge semiconductor detector unit, 23 ... Measuring instrument, 24
…tuning valve.

Claims (5)

[Claims] 1. A waste liquid receiving container, a waste liquid processing device connected to the waste liquid receiving container, a flow path switching device connected to the waste liquid processing device, and a downstream side of the flow path switching device connected via a transfer pipe. A complex water storage container, a return pipe for returning to the waste receiving container, a water quality automatic analyzer branched and connected from a pipe connecting the waste liquid treatment device and the flow path switching device, and this water quality automatic analysis A radioactive waste liquid treatment facility comprising: a signal line for inputting a diagnostic signal of the device to the flow path switching device, wherein the waste liquid treatment device comprises a hollow fiber membrane filter and an ion exchange resin tower connected in series. . 2. The waste liquid treatment device is a hollow fiber membrane filter,
The radioactive waste liquid treatment facility according to claim 1, comprising a combination of an ion exchange resin tower and a TOC removal device. 3. The radioactive waste liquid treatment facility according to claim 1, wherein the automatic water quality analyzer comprises one or both of a regular water quality automatic analyzer and a continuous water quality automatic analyzer. 4. The radioactive waste liquid according to claim 1, wherein the automatic water quality analyzer comprises at least one unit selected from a measuring unit, a storage unit, a diagnostic unit, a processing unit, an input unit and an output unit. Processing equipment. 5. The water quality analysis data of the diagnostic unit,
A measurement signal value output from the measurement unit or a calculation value obtained by calculating the measurement signal value by the processing unit, or a calculation value obtained by calculating the plurality of measurement signal values held in the storage unit by the processing unit. The radioactive waste liquid treatment facility according to claim 1, wherein the facility is configured to diagnose at least one of them.