DE4206200A1 - SAMPLE PREPARATION OF ASBESTIC MATERIALS - Google Patents
SAMPLE PREPARATION OF ASBESTIC MATERIALSInfo
- Publication number
- DE4206200A1 DE4206200A1 DE19924206200 DE4206200A DE4206200A1 DE 4206200 A1 DE4206200 A1 DE 4206200A1 DE 19924206200 DE19924206200 DE 19924206200 DE 4206200 A DE4206200 A DE 4206200A DE 4206200 A1 DE4206200 A1 DE 4206200A1
- Authority
- DE
- Germany
- Prior art keywords
- acid
- asbestos
- sample
- aqueous solution
- fluorine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 title claims description 9
- 238000002360 preparation method Methods 0.000 title claims description 6
- 239000010425 asbestos Substances 0.000 claims description 19
- 229910052895 riebeckite Inorganic materials 0.000 claims description 19
- 239000002253 acid Substances 0.000 claims description 12
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000002285 radioactive effect Effects 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 239000011737 fluorine Substances 0.000 claims description 8
- 229910052731 fluorine Inorganic materials 0.000 claims description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 7
- 238000011109 contamination Methods 0.000 claims description 7
- 150000003863 ammonium salts Chemical class 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- -1 Hexafluorosilicic acid Chemical compound 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 150000001447 alkali salts Chemical class 0.000 claims description 4
- 239000007791 liquid phase Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 230000001143 conditioned effect Effects 0.000 claims 1
- 150000007522 mineralic acids Chemical class 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000383 hazardous chemical Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 150000008043 acidic salts Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- BIJOYKCOMBZXAE-UHFFFAOYSA-N chromium iron nickel Chemical compound [Cr].[Fe].[Ni] BIJOYKCOMBZXAE-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000007884 disintegrant Substances 0.000 description 1
- 229910001055 inconels 600 Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Sampling And Sample Adjustment (AREA)
- Measurement Of Radiation (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zur Proben vorbereitung asbesthaltiger Materialien zur Messung radioak tiver Kontamination.The invention relates to a method for samples preparation of materials containing asbestos for the measurement of radioactivity contamination.
Bei Asbest-Sanierungsmaßnahmen an kerntechnischen Anla gen, an Anlagen, die zur Produktion oder Verarbeitung von radioaktiven Materialien oder Gefahrstoffen dienen, sowie an Gebäudeteilen, die in anderer Weise überdurchschnittlicher radioaktiver Strahlung ausgesetzt sind, müssen vor der Entfer nung asbesthaltiger Gefahrstoffe wie z. B. asbesthaltiger Stoffe, asbesthaltiger Zubereitungen wie Spritzasbest oder asbesthaltiger Erzeugnisse wie Dichtungen, Messungen durchge führt werden, die Aufschluß über den Grad der radioaktiven Kontamination des zu entfernenden Materials Aufschluß geben. Diese Messungen wurden bislang an in Festkörperform vorlie gendem Asbest durchgeführt.In the case of asbestos remediation measures on nuclear facilities on systems used for the production or processing of serve radioactive materials or hazardous substances, as well as at Parts of the building that are otherwise above average Exposed to radioactive radiation must be removed asbestos-containing hazardous substances such. B. containing asbestos Substances, preparations containing asbestos such as sprayed asbestos or asbestos-containing products such as seals, measurements leads to information about the level of radioactive Provide information about contamination of the material to be removed. These measurements were previously available in solid form asbestos.
Aufgabe der vorliegenden Erfindung ist es, die Messung der radioaktiven Kontamination von Asbest zu verbessern. Diese Auf gabe wird durch das in den Ansprüchen angegebene Verfahren zur Probenbereitung asbesthaltiger Materialien zur Messung radioak tiver Kontamination gelöst.The object of the present invention is to measure the improve radioactive contamination of asbestos. This on is given by the method specified in the claims Sample preparation of asbestos-containing materials for measuring radioac tive contamination solved.
Das erfindungsgemäße Verfahren zur Probenvorbereitung asbesthaltiger Materialien zur Messung radioaktiver Kontamina tion ist dadurch gekennzeichnet, daß man eine Probe des asbest haltigen Materials mit einer anorganischen Fluor enthaltenden Säure oder einem sauren Alkali- oder Ammoniumsalz einer solchen Säure zersetzt, gegebenenfalls in die flüssige Phase überführt und die Radioaktivität mißt.The method according to the invention for sample preparation asbestos-containing materials for measuring radioactive contaminants tion is characterized in that a sample of asbestos containing material with an inorganic fluorine-containing Acid or an acidic alkali or ammonium salt of such Acid decomposes, optionally converted into the liquid phase and measures the radioactivity.
Beispielsweise kann man das asbesthaltige Material mit den erwähnten Salzen aufschmelzen, anschließend mit Wasser verset zen und in wäßrige Lösung bringen und die Radioaktivität mes sen. Bevorzugt geht man so vor, daß die behandelte Probe gleich als wäßrige Lösung vorliegt. Dazu versetzt man die Probe vor zugsweise mit einer wäßrigen Lösung einer Fluor enthaltenden anorganischen Säure oder eines Alkali- oder Ammoniumsalzes als Zersetzungsmittel.For example, you can use the material containing asbestos Melt the salts mentioned, then add water zen and bring in aqueous solution and the radioactivity mes sen. It is preferred that the treated sample is the same is present as an aqueous solution. To do this, put the sample in front preferably with an aqueous solution containing a fluorine inorganic acid or an alkali or ammonium salt as Disintegrant.
Vorzugsweise beträgt die Konzentration der Fluor enthal tenden Säure oder ihres Alkali- oder Ammoniumsalzes in der wäß rigen Lösung 5 bis 40 Gew.-%, insbesondere 15 bis 40 Gew.-%.The concentration of the fluorine is preferably tendency acid or its alkali or ammonium salt in the aq solution 5 to 40 wt .-%, in particular 15 to 40 wt .-%.
Bevorzugt verwendet man als Zersetzungsmittel eine wäßrige Lösung eines sauren Salzes einer Fluor enthaltenden Säure, bei spielsweise Alkalibifluorid wie KHF2 oder Ammoniumbifluorid wie NR4RF2. Insbesondere bevorzugt man eine wäßrige Lösung von Flußsäure, Hexafluorokieselsäure oder Tetrafluoroborsäure. Na türlich kann man auch Gemische aus zweien oder mehreren dieser Verbindungen verwenden.An aqueous solution of an acidic salt of a fluorine-containing acid, for example alkali metal bifluoride such as KHF 2 or ammonium bifluoride such as NR 4 RF 2, is preferably used as the decomposing agent. An aqueous solution of hydrofluoric acid, hexafluorosilicic acid or tetrafluoroboric acid is particularly preferred. Of course, you can also use mixtures of two or more of these compounds.
Die Asbestprobe ist bei Anwendung wäßriger Fluor enthal tender Säuren als Zersetzungsmittel bereits nach kurzer Zeit zersetzt. Bei Verwendung von Flußsäure reicht eine Kontaktzeit von maximal einer halben Stunde aus. Die Zersetzung kann bei Umgebungstemperatur und Umgebungsdruck durchgeführt werden. Natürlich kann man die Probe gewünschtenfalls auch erhitzen oder eine Behandlung unter Druck vornehmen. The asbestos sample is included when using aqueous fluorine tender acids as decomposition agents after a short time decomposes. A contact time is sufficient when using hydrofluoric acid from a maximum of half an hour. The decomposition can Ambient temperature and pressure. Of course, the sample can also be heated if desired or under pressure treatment.
Nach der Zersetzung kann man die Probe vor der Messung der radioaktiven Kontamination gewünschtenfalls noch konditionie ren, beispielsweise verdünnen, konzentrieren, neutralisieren, etwaig ausgefallene Feststoffe abtrennen oder die zersetzte Probe fraktionieren.After decomposition, the sample can be measured before measuring radioactive contamination, if required, condition ren, for example dilute, concentrate, neutralize, remove any precipitated solids or the decomposed Fraction sample.
Die Zersetzung führt man zweckmäßigerweise in fluoridresi stenten bzw. flußsäureresistenten Behältnissen durch wie Teflon oder legierten Spezialstählen oder Legierungen, beispielsweise Inconel 600®. Dies ist eine Nickel-Chrom-Eisenlegierung.The decomposition is conveniently carried out in fluoride resi resistant or hydrofluoric acid-resistant containers such as Teflon or alloyed special steels or alloys, for example Inconel 600®. This is a nickel-chromium-iron alloy.
Die Probe wird dann entsprechend den Angaben der Geräte hersteller auf Radioaktivität untersucht, z. B. in einem Hand probenwechsler "FHT 770 K" mit Geiger-Müller-Zählrohr oder "FHT 770 S" mit Durchflußproportionalzählrohr auf 60Co oder 137Cs, oder in einem Ringschalenmeßplatz von der Firma FAG Ku gelfischer AG, mit welchem die simultane Messung der 131I- und 137Cs-Aktivität möglich ist.The sample is then tested for radioactivity according to the device manufacturer's instructions, e.g. B. in a hand sample changer "FHT 770 K" with Geiger-Müller counter tube or "FHT 770 S" with flow proportional counter tube at 60 Co or 137 Cs, or in a ring bowl measuring station from FAG Ku gelfischer AG, with which the simultaneous measurement of 131 I and 137 Cs activity is possible.
Durch das erfindungsgemäße Verfahren ist es möglich, die radioaktive Kontamination von Asbest in flüssiger Phase und daher sehr exakt zu vermessen. Ein weiterer Vorteil des erfin dungsgemäßen Verfahrens ist der Umstand, daß von der zersetzten Probe keine auf den Asbestgehalt zurückgehenden Gesundheitsge fährdungen mehr ausgehen.The inventive method, it is possible radioactive contamination of asbestos in the liquid phase and therefore very precise to measure. Another advantage of the invent method according to the invention is the fact that of the decomposed No health related to asbestos sample run out more risks.
Das folgende Beispiel soll die Erfindung weiter erläutern, ohne sie in ihrem Umfang einzuschränken.The following example is intended to explain the invention further, without restricting their scope.
50 g zerkleinerter, radioaktiv kontaminierter Asbest wurde 280 g einer 20 Gew.-% HF enthaltenden Flußsäure zersetzt.50 g of shredded, radioactive contaminated asbestos 280 g of a hydrofluoric acid containing 20% by weight of HF are decomposed.
Nach 5 Minuten konnte die entstandene asbestfreie Lösung nach Neutralisation in einem Handprobenwechsler "FHT 770 K", Firma Kugelfischer, untersucht werden.After 5 minutes, the resulting asbestos-free solution could Neutralization in a manual sample changer "FHT 770 K", company Puffer, to be examined.
Claims (5)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19924206200 DE4206200A1 (en) | 1992-02-28 | 1992-02-28 | SAMPLE PREPARATION OF ASBESTIC MATERIALS |
| EP93102715A EP0557914A3 (en) | 1992-02-28 | 1993-02-20 | Sample preparation of asbestos containing materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19924206200 DE4206200A1 (en) | 1992-02-28 | 1992-02-28 | SAMPLE PREPARATION OF ASBESTIC MATERIALS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4206200A1 true DE4206200A1 (en) | 1993-09-02 |
Family
ID=6452825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19924206200 Withdrawn DE4206200A1 (en) | 1992-02-28 | 1992-02-28 | SAMPLE PREPARATION OF ASBESTIC MATERIALS |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0557914A3 (en) |
| DE (1) | DE4206200A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589941A (en) * | 2011-12-30 | 2012-07-18 | 内蒙古包钢钢联股份有限公司 | Preparing method for fluoride-containing standard sample of iron ore |
| CN111498850B (en) * | 2020-04-26 | 2021-08-20 | 江南大学 | Two-dimensional transition metal carbonitride and preparation method and application thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5123467B1 (en) * | 1968-12-12 | 1976-07-16 | ||
| FR2592722B1 (en) * | 1986-01-06 | 1988-05-06 | Gonthier Bruno | METHOD FOR CONTAMINATION AND IRRADIATION MEASUREMENT AND UNIVERSAL SENSOR FOR IMPLEMENTING SAID METHOD |
| AU3369589A (en) * | 1988-04-30 | 1989-11-24 | Nippon Steel Chemical Co. Ltd., | Asbestos-treating agent and process for treating asbestos |
| DE4027844A1 (en) * | 1990-09-03 | 1992-03-05 | Kali Chemie Ag | METHOD FOR DECOMPOSING ASBEST |
-
1992
- 1992-02-28 DE DE19924206200 patent/DE4206200A1/en not_active Withdrawn
-
1993
- 1993-02-20 EP EP93102715A patent/EP0557914A3/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0557914A2 (en) | 1993-09-01 |
| EP0557914A3 (en) | 1995-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2399262B1 (en) | Method for decontaminating radioactively contaminated surfaces | |
| DE102017107037B3 (en) | Process for the recovery of uranium from uranium oxide contaminated components | |
| Andres et al. | Long-term behaviour of toxic metals in stabilized steel foundry dusts | |
| DE2913283A1 (en) | TEST TUBE FOR MEASURING CHROMATE AND CHROME ACID AEROSOLS IN AIR | |
| EP0474093A1 (en) | Process for the decomposition of asbestos | |
| DE4206200A1 (en) | SAMPLE PREPARATION OF ASBESTIC MATERIALS | |
| EP0916083B1 (en) | Corrosion monitoring process | |
| JPH0339681A (en) | Method of measuring radioactivity of metallic or sement containing body | |
| DE2511112C3 (en) | Process for the decontamination of surfaces of metallic materials | |
| DE4210832C1 (en) | Determn. of tritium content in radioactive sample opt. contg. other radio-nuclides - by holding sample in container permeable only to hydrogen isotope ions, heating and supplying with inert gas | |
| DE2100801A1 (en) | Process for the production of radioactive iodine 131 | |
| DE102021111385B4 (en) | Method and device for determining the release capability of mercury-containing residues from nuclear facilities | |
| Golimowski et al. | Determination of mercury in freeze-dried muscle samples of pike, cod and perch using an ASV-technique | |
| Lambert et al. | Radiation doses received by workers using tritium in industry | |
| DE2612893C3 (en) | Method for measuring the activity of tritium contained in a radioactive aqueous solution | |
| Vennart | The usage of radioactive luminous compound and the need for biological monitoring of workers | |
| Shrivastava et al. | Studies on lead pollution: atomic absorption spectrophotometric determination of lead in hair and teeth samples | |
| DE3622790A1 (en) | Method for allocating the activity of contaminated or activated components and materials and arrangement for carrying out the method | |
| EP4202500A1 (en) | Evaluation of radionuclide ratios | |
| EP0557915A1 (en) | Process for the disposal of radioactivity contaminated asbestos | |
| DE2153758C3 (en) | Process for the production of measurement preparations, in particular for X-ray fluorescence analysis | |
| Wolfe | Nuclear Reactor Accidents: Long-Term Health Effects | |
| Hylton | Dissolution of Neptunium and Plutonium Oxides Using a Catalyzed Electrolytic Process | |
| Foster et al. | ADSORPTION OF YOUNG FISSION PRODUCTS ON VARIOUS SURFACES FROM NEUTRAL AND DILUTE ACID MEDIA: APPLICATION TO WATER SAMPLE COLLECTION FOR STEP PROGRAMS | |
| Hempowitz et al. | Method and equipment for the measurement of the amount of a component of a radio-opaque mixture of materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |