EP1089296B1 - Installation for handling radioactively charged waste water - Google Patents

Installation for handling radioactively charged waste water Download PDF

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Publication number
EP1089296B1
EP1089296B1 EP00116503A EP00116503A EP1089296B1 EP 1089296 B1 EP1089296 B1 EP 1089296B1 EP 00116503 A EP00116503 A EP 00116503A EP 00116503 A EP00116503 A EP 00116503A EP 1089296 B1 EP1089296 B1 EP 1089296B1
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Prior art keywords
tank
radioactivity
nuclides
sewage
collecting
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EP00116503A
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German (de)
French (fr)
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EP1089296A1 (en
Inventor
Hubert Dipl.-Ing. Kaluza
Christian Dipl.-Ing. Sporn
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Triton-Format Schiffstechnik Umweltschutzsysteme GmbH
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Triton-Format Schiffstechnik Umweltschutzsysteme GmbH
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/20—Disposal of liquid waste
    • G21F9/22—Disposal of liquid waste by storage in a tank or other container

Definitions

  • the invention relates to a device for the Handling radioactive doped waste water, in particular by radionuclides in medical therapy and Diagnostics, via decay systems with intermediate storage of waste water in collecting tanks and finding the approved radioactivity before being discharged into a Drains.
  • radionuclides that are used metabolic diseases (functional diagnostics) or local defects (localization diagnostics) too diagnose or inflammation or malformation to be able to target therapy.
  • the patient applied radionuclides are predominantly based on eliminated naturally.
  • JOD-131 is the very low activity concentration of 7 Bq per liter.
  • the necessary cooldowns are usually at least 16 HWZ, ie around 130 days for JOD-131.
  • the decay factors have powers of 10- 5 or 10- 6 .
  • the object of the invention is to provide a device generic type to improve with little Effort a relatively precise capture of the content of To enable collection containers in a simple manner and to make optimal use of a limited storage capacity, to optimize medical treatment, as well as a Compliance with the specified regulations enable.
  • the waste water can be fed to a buffer tank with the interposition of a measuring tank an integrated probe for radioactivity and / or Nuclide determination in a collection tank can be emptied in batches and that the determined Measurement data from an assigned control and computing unit for volume and activity accounting of the Collecting tanks can be fed, in comparison to one set radioactivity after a in advance Calculable cooldown of the collecting tank can be emptied is.
  • the measured values are compared to a subsequent one Activity measurement by many before the cooldown ends Orders of magnitude higher, the statistics of stochastic Events radioactivity is significantly better. It there are much greater measuring accuracies and skillful disposition of the chosen collection tanks higher and wastewater and activity throughputs or shorter storage times also achieved.
  • An advantageous training is that several Collection tanks are arranged in parallel.
  • the arranged in parallel Collection tanks each for different heights Activities and / or different nuclides arranged and can be loaded via the control and computing unit are.
  • a favorable training is created in that the buffer tank is designed as part of a vacuum system is.
  • the measurement data of Measuring tanks can be fed into the control and computing unit, the radioactivities and / or nuclides of the ingested Wastewater from the collection container and after one predetermined decay time via a computer program Derivation after reaching the set values is controllable.
  • the feces are considered Waste water from a toilet 30 and a buffer tank 1 fed.
  • the buffer tank 1 is either as Gravity tank or vacuum tank executed.
  • the waste water in a measuring tank 19 transferred to an integrated measuring probe 20 for Has radioactivity determination.
  • the corresponding Measured values are sent to a control and computing unit 31 fed and processed.
  • the Measuring tank 19 emptied and the waste water is thus a selected collection tank 32 in batches supplied, now the required measurement before Start of storage was carried out.
  • the on this Way in the collection tank 32 captured nuclides and Activities are therefore necessary Cooldown on the control and computing unit 31 in calculable in advance.
  • the control and computing unit 31 is in accordance with the Preset requirements, and in a known manner becomes a necessary valve and pump control performed.
  • valve positions are detected and valve controls carried out according to the program become.
  • the entire system is controlled by a PLC control that simplifies handling and management switched on a PC visualization becomes.
  • a buffer tank 1 is placed under vacuum.
  • An in the circuit switched on ball valve 10 of the Pump line is open as well as with a Check valve 9 provided and the air is over a filter 14 and a heat exchanger 29 for Warming the air to prevent one Pumped condensate. Possibly nevertheless emerged Condensate is returned to the buffer tank.
  • the Pressure conditions in the buffer tank 1 are indicated by a Pressure switch 7 regulated.
  • the resulting vacuum is indicated by a manometer 6.
  • One in this Measuring line arranged solenoid valve 8 is only for Making an external connection open when the Buffer tank 1 via an open gate valve 11 is pumped out with a sewage pump 3 in total.
  • the waste water reaches an open ball valve 4 an inlet 5 in the buffer tank 1, the Gate valve 11 is closed.
  • the buffer tank 1 has sensors 15, 16 and 17 for the Level, the sensor 15 being used for the measurement sufficient filling indicates, the sensor 16 the lower Level and sensor 17 reports the overfill.
  • the Solenoid valves 24 and 25 for filling in the Connecting lines of the measuring tank 19 opened.
  • a metering pump 18 is used, if there is no natural level compensation.
  • the valves 24 and 25 closed and via the measuring probe 20 the activity is determined.
  • the Measuring container 19 can also with compressed air, which is introduced directly via the valve 22, in the Empty the pipeline to the collecting tank 32.
  • the measuring volume of the measuring tank 19 can be smaller than the volume of the entire pipe content up to Collection tank 32, so this may occur measured volume only with the next batch in the Collection tank 32 a.

Abstract

Apparatus for treating waste water containing radionuclides resulting from medical therapy or diagnosis comprises a buffer tank into which the water is fed. This can be emptied in batches via a metering tank with an integral probe, which measures the amount of radioactivity and/or nuclides it contains, into a storage tank. Apparatus for treating waste water containing radionuclides resulting from medical therapy or diagnosis comprises a buffer tank (1) into which the water is fed. This can be emptied in batches via a metering tank (19) with an integral probe (20), which measures the amount of radioactivity and/or nuclides it contains, into a storage tank (32). A computer (31) uses the data from the probe to control the volume of water in the storage tank and its total activity, so that the tank can be emptied after a precalculated decay time. In one embodiment of the invention several storage tanks are used, arranged in parallel. Each of these is used for a different level of radioactivity and/or different nuclides. The buffer tank forms part of a vacuum system.

Description

Die Erfindung bezieht sich auf eine Vorrichtung für die Handhabung radioaktiv dotierter Abwässer, insbesondere durch Radionuklide bei der medizinischen Therapie und Diagnostik, über Abklinganlagen mit Zwischenlagerung von Abwässern in Sammeltanks und Feststellung der zugelassenen Radioaktivität vor Ableitung in eine Kanalisation.The invention relates to a device for the Handling radioactive doped waste water, in particular by radionuclides in medical therapy and Diagnostics, via decay systems with intermediate storage of waste water in collecting tanks and finding the approved radioactivity before being discharged into a Drains.

Es besteht im Krankenhausbereich in der Humanmedizin das Problem der Entsorgung der bei den Behandlungen anfallenden offenen Radionuklide, die verwendet werden, um Stoffwechselerkrankungen (Funktionsdiagnostik) oder lokale Defekte (Lokalisationsdiagnostik) zu diagnostizieren oder Entzündungen oder Mißbildungen gezielt therapieren zu können. Die dem Patienten applizierten Radionuklide werden überwiegend auf natürlichem Wege ausgeschieden.It exists in the hospital area in human medicine the problem of disposing of the treatments resulting open radionuclides that are used metabolic diseases (functional diagnostics) or local defects (localization diagnostics) too diagnose or inflammation or malformation to be able to target therapy. The patient applied radionuclides are predominantly based on eliminated naturally.

Die Aktivitäten haben teilweise erhebliche Größenordnungen, insbesondere werden bei höheren regelmäßigen Patientenanzahlen und ganz besonders bei therapeutischer Anwendung beträchtliche Aktivitäten akkumuliert, mit denen die Umwelt beständig belastet wird.Some of the activities have been significant Orders of magnitude, especially at higher ones regular patient numbers and especially with therapeutic application considerable activity accumulated with which the environment is constantly burdened becomes.

Zulässige Umweltbelastungen sind in der StrSchV (Strahlenschutzverordnung) festgelegt. Die Genehmigungsbehörden für den Umgang mit radioaktiven Stoffen nennen individuell festgelegte Werte in ihren Zulassungen.Permitted environmental pollution are in the StrSchV (Radiation Protection Ordinance). The Licensing authorities for the handling of radioactive Fabrics name individually defined values in their Approvals.

Die Vorschriften regeln, daß derjenige, welcher eine Genehmigung für den Umgang mit Radionukliden besitzt und den Umgang durchführt, sicherzustellen hat, daß die in der StrSchV oder der Umgangsgenehmigung genannten Werte eingehalten, insbesondere nicht überschritten werden und diese nach dem Stand von Wissenschaft und Technik so niedrig wie möglich und wirtschaftlich vertretbar gehalten werden.The regulations stipulate that the one who has a Approved to handle radionuclides and the handling, has to ensure that the mentioned in the StrSchV or the handling permit Compliance with values, especially not exceeded and this according to the state of science and Technology as low as possible and economical be held reasonable.

Die regelmäßige Bilanzierung aller vom Lieferanten erhaltenen, an Patienten applizierten oder im Labor verbrauchten Nuklide und Aktivitäten und aller intern oder extern an die Umwelt abgegebenen Radioaktivitäten weist generell sowohl in der Diagnostik wie in der Therapie bei praktisch allen Institutionen beträchtliche Mängel auf. Hierbei kann das Argument, es handele sich fast immer um kurzlebige (kurze Halbwertzeiten) Nuklide, nicht akzeptiert werden, da ja ein ständiger Nachschub erfolgt und dieser höher sein kann als der physikalisch-radioaktive Zerfall.The regular balancing of all from the supplier received, applied to patients or in the laboratory spent nuclides and activities and all internally or radioactivity released externally to the environment generally shows both in diagnostics and in Therapy in practically all institutions considerable shortcomings. Here, the argument it are almost always short-lived (short Half-lives) Nuclides, not accepted, since yes there is a constant replenishment and this is higher can be called the physical-radioactive decay.

Nur für Therapieabteilungen besteht die unumgängliche Vorschrift, Fäkalien und auch Wasch- oder Duschwasser aufzufangen und mindestens solange zu lagern, bis die höchste zulässige Aktivitätskonzentration und bis für alle hierbei abgelassenen Abwässer im Jahr eine Gesamtaktivität unterschritten wird.The only essential is for therapy departments Regulation, faeces and also wash or shower water catch and store at least until the highest permissible activity concentration and up to all wastewater discharged in the year one Overall activity is undercut.

Es ist bekannt, daß die Aktivitäten der in Sammelbehältern gelagerten Abwässer vor dem Ablassen durch einzelne Probenentnahmen oder durch kontinuierliche Durchflußmessung während eines kompletten Umpumpvorgangs oder durch großvolumige Detektoren jedes Sammeltanks ermittelt werden. Es handelt sich beispielsweise bei JOD-131 um die sehr geringen Aktivitätskonzentrationen von 7 Bq pro Liter. Sowohl bei der Probenentnahme als auch bei der Durchflußmessung oder der "Gesamt"-Messung entstehen ganz erhebliche Meßunsicherheiten infolge der sehr geringen Aktivitätskonzentrationen, der Inhomogenität der Fäkalien oder der ungenügenden Verweildauer des Volumenelementes im Durchflußzähler oder der nicht kalkulierbaren Selbstabsorption im Medium Fäkalie bei der "Gesamt"-Messung. Die notwendigen Abklingzeiten betragen in der Regel mindestens 16 HWZ, d.h. bei JOD-131 rund 130 Tage. Die Abklingfaktoren haben Potenzen von 10-5 oder 10-6.It is known that the activities of the wastewater stored in collecting tanks are determined by individual sampling or by continuous flow measurement during a complete pumping process or by large-volume detectors of each collecting tank before they are discharged. For example, JOD-131 is the very low activity concentration of 7 Bq per liter. Considerable measurement uncertainties arise due to the very low activity concentrations, the inhomogeneity of the faeces or the inadequate dwell time of the volume element in the flow meter or the incalculable self-absorption in the medium faecal matter in the case of the "total", both during sampling and during flow measurement or the "total" measurement "-Measurement. The necessary cooldowns are usually at least 16 HWZ, ie around 130 days for JOD-131. The decay factors have powers of 10- 5 or 10- 6 .

Die Aufgabe der Erfindung ist es, eine Vorrichtung der gattungsgemäßen Art zu verbessern, um mit geringem Aufwand eine relativ genaue Erfassung des Inhaltes von Sammelbehältern auf einfache Weise zu ermöglichen und eine beschränkte Lagerkapazität optimal auszunutzen, den medizinischen Umgang zu optimieren, sowie eine Einhaltung der vorgegebenen Bestimmungen zu ermöglichen.The object of the invention is to provide a device generic type to improve with little Effort a relatively precise capture of the content of To enable collection containers in a simple manner and to make optimal use of a limited storage capacity, to optimize medical treatment, as well as a Compliance with the specified regulations enable.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß dadurch, daß das Abwasser einem Puffertank zuführbar ist, der unter Zwischenschaltung eines Meßtanks mit einer integrierten Meßsonde zur Radioaktivitätsund/oder Nuklidbestimmung in einen Sammeltank chargenweise entleerbar ist und daß die ermittelten Meßdaten einer zugeordneten Steuer- und Recheneinheit zur Volumen- und Aktivitätenbilanzierung des Sammeltanks zuführbar sind, wobei im Abgleich zu einer eingestellten Radioaktivität nach einer im Voraus errechenbaren Abklingzeit der Sammeltank entleerbar ist.This object is achieved according to the invention in that the waste water can be fed to a buffer tank with the interposition of a measuring tank an integrated probe for radioactivity and / or Nuclide determination in a collection tank can be emptied in batches and that the determined Measurement data from an assigned control and computing unit for volume and activity accounting of the Collecting tanks can be fed, in comparison to one set radioactivity after a in advance Calculable cooldown of the collecting tank can be emptied is.

Der Vorteil dieser Ausbildung besteht darin, daß die zugeführten Abwässer zum Sammeltank und ihre Aktivitäten genau erfaßbar sind. Durch die Messung vor Beginn der Lagerung sind somit die aufgefangenen Nuklide und Aktivitäten explizit bekannt. Die notwendige Abklingzeit ist unmittelbar vorauskalkulierbar; damit wird auch der Umfang des genehmigten Umgangs mit Radionukliden zu jeder Zeit im voraus konkret beschränk- oder erweiterbar.The advantage of this training is that the fed waste water to the collection tank and their Activities can be recorded precisely. By measuring before The beginning of storage are thus the captured ones Nuclides and activities explicitly known. The necessary cooldown is immediate vorauskalkulierbar; this also increases the scope of the approved handling of radionuclides at any time in the can be limited or expanded in advance.

Die Meßwerte sind gegenüber einer nachträglichen Aktivitätsmessung vor Abschluß der Abklingzeit um viele Größenordnungen höher, die Statistik der stochastischen Ereignisse Radioaktivität ist signifikant besser. Es ergeben sich viel größere Meßgenauigkeiten und geschickte Disposition der gewählten Sammeltanks werden höhere und Abwasser- und Aktivitätendurchsätze oder auch kürzere Lagerzeiten erzielt.The measured values are compared to a subsequent one Activity measurement by many before the cooldown ends Orders of magnitude higher, the statistics of stochastic Events radioactivity is significantly better. It there are much greater measuring accuracies and skillful disposition of the chosen collection tanks higher and wastewater and activity throughputs or shorter storage times also achieved.

Da die Gesamtaktvitäten der großen Sammeltanks im voraus genau berechnet werden, kann darauf verzichtet werden, in den Abwässern vor dem Abpumpen durch Rühroder andere Mischverfahren eine sicher homogene Aktivitätenverteilung zu erzwingen, wie es bei nachträglichen Meßverfahren unumgänglich notwendig, aber in der Praxis realistisch nicht erreichbar ist.Since the overall activities of the large collection tanks in the can be calculated precisely in advance, this can be dispensed with in the waste water before being pumped out by stirring or other mixing methods a certainly homogeneous To force activity distribution, as is the case with subsequent measurement procedures absolutely necessary, but is not realistically achievable in practice.

Die rechtzeitige Kalkulation mit verschiedenen Nukliden und unterschiedlichen Aktivitäten macht es möglich, die Beschickung der Sammeltanks der Anlage selektiv und nicht zyklisch zu wählen. Timely calculation with different nuclides and different activities makes it possible to Selective and not to choose cyclically.

Eine vorteilhafte Ausbildung besteht darin, daß mehrere Sammeltanks parallel angeordnet sind. In Weiterbildung ist vorgesehen, daß die parallel angeordneten Sammeltanks jeweils für unterschiedlich hohe Aktivitäten und/oder verschiedene Nuklide angeordnet und über die Steuer- und Recheneinheit beschickbar sind.An advantageous training is that several Collection tanks are arranged in parallel. In further training it is intended that the arranged in parallel Collection tanks each for different heights Activities and / or different nuclides arranged and can be loaded via the control and computing unit are.

Eine günstige Ausbildung wird dadurch geschaffen, daß der Puffertank als Teil einer Vakuumanlage ausgebildet ist.A favorable training is created in that the buffer tank is designed as part of a vacuum system is.

Um eine vorteilhafte Erfassung und Steuerung zu gewährleisten, wird vorgeschlagen, daß die Meßdaten des Meßtanks in die Steuer- und Recheneinheit einspeisbar, die Radioaktivitäten und/oder Nuklide der aufgenommenen Abwässer der Sammelbehälter bilanziert und nach einer vorgegebenen Abklingzeit über ein Rechnerprogramm eine Ableitung nach Erreichen der eingestellten Werte steuerbar ist.In order to provide advantageous detection and control ensure, it is proposed that the measurement data of Measuring tanks can be fed into the control and computing unit, the radioactivities and / or nuclides of the ingested Wastewater from the collection container and after one predetermined decay time via a computer program Derivation after reaching the set values is controllable.

In der Zeichnung sind Ausführungsbeispiele der Erfindung schematisch dargestellt. Es zeigen:

Fig. 1
eine Prinzipdarstellung einer Ausbildung mit zwei parallelen Sammeltanks
Fig. 2
eine konkretisierte Ausbildung als Vakuumanlage ohne dargestellter Steuer- und Recheneinheit.
Exemplary embodiments of the invention are shown schematically in the drawing. Show it:
Fig. 1
a schematic diagram of an education with two parallel collection tanks
Fig. 2
a specific training as a vacuum system without shown control and computing unit.

Bei der dargestellten Anordnung werden die Fäkalien als Abwasser von einer Toilette 30 einem Puffertank 1 zugeführt. Hierbei ist der Puffertank 1 entweder als Schwerkraftbehälter oder Vakuumbehälter ausgeführt. Aus dem Puffertank 1 werden die Abwässer in einen Meßtank 19 überführt, der eine integrierte Meßsonde 20 zur Radioaktivitätsbestimmung aufweist. Die entsprechenden Meßwerte werden einer Steuer- und Recheneinheit 31 zugeführt und verarbeitet. Anschließend wird der Meßtank 19 entleert und die Abwässer werden somit chargenweise einem ausgewählten Sammeltank 32 zugeführt, wobei nunmehr die erforderliche Messung vor Beginn der Lagerung durchgeführt wurde. Die auf diese Weise im Sammeltank 32 aufgefangenen Nuklide und Aktivitäten sind somit bezüglich der notwendigen Abklingzeit über die Steuer- und Recheneinheit 31 im voraus kalkulierbar.In the arrangement shown, the feces are considered Waste water from a toilet 30 and a buffer tank 1 fed. Here, the buffer tank 1 is either as Gravity tank or vacuum tank executed. Out the buffer tank 1, the waste water in a measuring tank 19 transferred to an integrated measuring probe 20 for Has radioactivity determination. The corresponding Measured values are sent to a control and computing unit 31 fed and processed. Then the Measuring tank 19 emptied and the waste water is thus a selected collection tank 32 in batches supplied, now the required measurement before Start of storage was carried out. The on this Way in the collection tank 32 captured nuclides and Activities are therefore necessary Cooldown on the control and computing unit 31 in calculable in advance.

Wenn die geforderten Werte im Sammeltank 32 erreicht sind, werden die gesammelten Abwässer über eine Pumpe 33 in eine Kanalisation 34 geleitet.When the required values in the collecting tank reach 32 the collected wastewater is pumped 33 passed into a sewer 34.

Die Steuer- und Recheneinheit 31 ist entsprechend den Erfordernissen voreingestellt, und in bekannter Weise wird eine erforderliche Ventil- und Pumpensteuerung vorgenommen.The control and computing unit 31 is in accordance with the Preset requirements, and in a known manner becomes a necessary valve and pump control performed.

In der Ausführung gemäß Fig. 2 ist eine konkretisierte Ausbildung ohne näher dargestellte Steuer- und Recheneinheit 31 gezeigt, wobei Ventilstellungen erfaßt und Ventilsteuerungen programmgemäß durchgeführt werden. Die Steuerung des Gesamtsystems erfolgt durch eine SPS-Steuerung, der zur Vereinfachung des Handlings und Managements eine PC-Visualisierung zugeschaltet wird.2 is a concrete one Training without detailed tax and Computing unit 31 shown, wherein valve positions are detected and valve controls carried out according to the program become. The entire system is controlled by a PLC control that simplifies handling and management switched on a PC visualization becomes.

Es ist hierbei vorgesehen, daß mit einem Vakuumerzeuger 2 ein Puffertank 1 unter Vakuum gesetzt wird. Ein in den Kreislauf eingeschalteter Kugelhahn 10 der Pumpenleitung ist geöffnet sowie mit einem Rückschlagventil 9 versehen und die Luft wird über einen Filter 14 und einem Wärmetauscher 29 zur Erwärmung der Luft für die Verhinderung eines Kondensats abgepumpt. Eventuell dennoch entstandenes Kondensat wird in den Puffertank zurückgeführt. Die Druckverhältnisse im Puffertank 1 werden durch einen Druckschalter 7 geregelt. Das entstandene Vakuum wird durch ein Manometer 6 angezeigt. Ein in dieser Meßleitung angeordnetes Magnetventil 8 wird nur zur Herstellung einer Außenverbindung geöffnet, wenn der Puffertank 1 über einen geöffneten Absperrschieber 11 mit einer Abwasserpumpe 3 insgesamt abgepumpt wird.It is provided that with a vacuum generator 2 a buffer tank 1 is placed under vacuum. An in the circuit switched on ball valve 10 of the Pump line is open as well as with a Check valve 9 provided and the air is over a filter 14 and a heat exchanger 29 for Warming the air to prevent one Pumped condensate. Possibly nevertheless emerged Condensate is returned to the buffer tank. The Pressure conditions in the buffer tank 1 are indicated by a Pressure switch 7 regulated. The resulting vacuum is indicated by a manometer 6. One in this Measuring line arranged solenoid valve 8 is only for Making an external connection open when the Buffer tank 1 via an open gate valve 11 is pumped out with a sewage pump 3 in total.

Die Abwässer gelangen über einen geöffneten Kugelhahn 4 eines Zulaufs 5 in den Puffertank 1, wobei der Absperrschieber 11 geschlossen ist. Der Puffertank 1 besitzt entsprechend Sensoren 15,16 und 17 für den Füllstand, wobei der Sensor 15 die für die Messung hinreichene Füllung angibt, der Sensor 16 den unteren Füllstand und Sensor 17 die Überfüllung meldet.The waste water reaches an open ball valve 4 an inlet 5 in the buffer tank 1, the Gate valve 11 is closed. The buffer tank 1 has sensors 15, 16 and 17 for the Level, the sensor 15 being used for the measurement sufficient filling indicates, the sensor 16 the lower Level and sensor 17 reports the overfill.

Wenn die Füllhöhe 15 erreicht wird, werden die Magnetventile 24 und 25 zur Befüllung in den Verbindungsleitungen des Meßtanks 19 geöffnet. Hierzu wird gegebenenfalls eine Dosierpumpe 18 eingesetzt, wenn ein natürlicher Niveauausgleich nicht erfolgt. Nach Befüllung des Meßtanks 19 werden die Ventile 24 und 25 geschlossen und über die eingesetzte Meßsonde 20 die Aktivität ermittelt. Nunmehr wird der Meßtank 19 über die Pumpe 3 entleert, wobei die Magnetventile 22 und 27 in der Luftzuführung und Ableitung geöffnet werden. Über das Ventil 22 kann somit Luft nachströmen, und die gemessenen Abwässer können durch die Pumpe 3 in eine Rohrleitung zum Sammeltank 32 gedrückt werden. Der Meßbehälter 19 läßt sich auch mit Druckluft, welches über das Ventil 22 unmittelbar eingeführt wird, in die Rohrleitung zum Sammeltank 32 entleeren.When the fill level 15 is reached, the Solenoid valves 24 and 25 for filling in the Connecting lines of the measuring tank 19 opened. For this if necessary, a metering pump 18 is used, if there is no natural level compensation. After the measuring tank 19 has been filled, the valves 24 and 25 closed and via the measuring probe 20 the activity is determined. Now the measuring tank 19th emptied via the pump 3, the solenoid valves 22 and 27 opened in the air supply and discharge become. Air can thus flow in via valve 22, and the measured waste water can by the pump 3 in a pipe can be pressed to the collecting tank 32. The Measuring container 19 can also with compressed air, which is introduced directly via the valve 22, in the Empty the pipeline to the collecting tank 32.

Das Meßvolumen des Meßtanks 19 kann kleiner sein als das Volumen des gesamten Rohrinhaltes bis zum Sammeltank 32, deshalb tritt gegebenenfalls das gemessene Volumen erst mit der nächsten Charge in dem Sammeltank 32 ein.The measuring volume of the measuring tank 19 can be smaller than the volume of the entire pipe content up to Collection tank 32, so this may occur measured volume only with the next batch in the Collection tank 32 a.

Dieser Vorgang wird solange wiederholt bis der untere Füllstand 16 erreicht ist.This process is repeated until the lower one Level 16 is reached.

Claims (5)

  1. Apparatus for handling sewage with a radioactive burden, in particular as a result of radioactive nuclides used for medical treatment and diagnostics, by means of decay installations with intermediate storage of sewage in collecting tanks and determination of the permitted radioactivity prior to disposal into a sewage system, characterized in that the sewage is suppliable to a buffer tank (1), which is dischargeable in batches via a measuring tank (19) having an integrated measurement probe (20) for radioactivity and/or nuclide determination into a collecting tank (32), and that the determined measurement data are feedable to an associated control and computing unit (31) for assessment of the volume and activity of the collecting tank (32), wherein upon adjustment to a set radioactivity after a precalculable decay time the collecting tank (32) is dischargeable.
  2. Apparatus according to claim 1, characterized in that a plurality of collecting tanks (32) are arranged in parallel.
  3. Apparatus according to claim 1 or 2, characterized in that the collecting tanks (32) arranged in parallel are disposed in each case for different levels of radioactivity and/or different nuclides and chargeable by means of the control and computing unit (31).
  4. Apparatus according to one of claims 1 to 3, characterized in that the buffer tank (1) is designed as part of a vacuum system.
  5. Apparatus according to one of claims 1 to 4,
    characterized in that the measurement data of the measuring tank (19) are feedable into the control and computing unit (31), the radioactive levels and/or nuclides of the received sewage of the collecting tanks (32) are assessed and after a preset decay time by means of a computer program a disposal after attainment of the set values is controllable.
EP00116503A 1999-09-28 2000-07-31 Installation for handling radioactively charged waste water Expired - Lifetime EP1089296B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19946392 1999-09-28
DE19946392A DE19946392C2 (en) 1999-09-28 1999-09-28 Device for the handling of radioactive doped waste water

Publications (2)

Publication Number Publication Date
EP1089296A1 EP1089296A1 (en) 2001-04-04
EP1089296B1 true EP1089296B1 (en) 2004-02-25

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ID=7923544

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Application Number Title Priority Date Filing Date
EP00116503A Expired - Lifetime EP1089296B1 (en) 1999-09-28 2000-07-31 Installation for handling radioactively charged waste water

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EP (1) EP1089296B1 (en)
AT (1) ATE260510T1 (en)
DE (2) DE19946392C2 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2551390A1 (en) * 1975-11-15 1977-05-26 Rautenbach Robert Decontaminating radioactive waste water - in plant contg. supply tank placed above turbulent delay tank emptying into collecting tank
DE2851781A1 (en) * 1978-11-30 1980-06-04 Frieseke & Hoepfner Gmbh Radioactive sewage delay-tank system for activity control - esp. for use with water-conserving toilets in nuclear therapy wards
JPS61155979A (en) * 1984-12-28 1986-07-15 Nippon Atom Ind Group Co Ltd Apparatus for measuring radioactivity
DE3830839A1 (en) * 1988-09-10 1990-03-15 Wiederaufarbeitung Von Kernbre METHOD AND DEVICE FOR MONITORING THE DELIVERY OF LIQUIDS
DE4016116A1 (en) * 1990-05-18 1991-11-21 Georg Kinzler Continuous waste water disinfection - using indicator to monitor disinfection dwell time

Also Published As

Publication number Publication date
EP1089296A1 (en) 2001-04-04
ATE260510T1 (en) 2004-03-15
DE50005396D1 (en) 2004-04-01
DE19946392C2 (en) 2003-04-24
DE19946392A1 (en) 2001-04-12

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