CZ277798B6 - Decontamination solution for the removal of slightly fixed contamination - Google Patents

Decontamination solution for the removal of slightly fixed contamination Download PDF

Info

Publication number
CZ277798B6
CZ277798B6 CS914004A CS400491A CZ277798B6 CZ 277798 B6 CZ277798 B6 CZ 277798B6 CS 914004 A CS914004 A CS 914004A CS 400491 A CS400491 A CS 400491A CZ 277798 B6 CZ277798 B6 CZ 277798B6
Authority
CZ
Czechia
Prior art keywords
weight
decontamination
removal
solution
decontamination solution
Prior art date
Application number
CS914004A
Other languages
Czech (cs)
Slovak (sk)
Inventor
Dusan Rndr Majersky
Original Assignee
Vyskumny Ustav Jadrovych Elekt
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vyskumny Ustav Jadrovych Elekt filed Critical Vyskumny Ustav Jadrovych Elekt
Priority to CS914004A priority Critical patent/CZ277798B6/en
Priority to SK400491A priority patent/SK277791B6/en
Publication of CS400491A3 publication Critical patent/CS400491A3/en
Publication of CZ277798B6 publication Critical patent/CZ277798B6/en

Links

Landscapes

  • Detergent Compositions (AREA)

Abstract

Invention is solving the composition of decontaminating solution for elimination of feeblefixed contamination from surfaces of building and technological parts of nucleus- -energetical devices contaminated by escape, drope or by transfer of radioactive particles. Solution consists of glycerol, phosphoric acid or nitric acid, hydrazine or hydrogene peroxide and water.

Description

(57) Anotace:(57)

Roztok je zložený zo 60 až 85 % hmotnostných glycerínu, 10 až 30 % hmotnostných kyseliny fosforečnej alebo kyseliny dusičnej, 0,5 až 5 % hmotnostných hydrazínu alebo peroxidu vodíka. a zvyšného obsahu vody do 100 % hmotnostných.The solution is composed of 60 to 85% by weight glycerin, 10 to 30% by weight phosphoric acid or nitric acid, 0.5 to 5% by weight hydrazine or hydrogen peroxide. and a residual water content of up to 100% by weight.

CZ 277 798 B6CZ 277 798 B6

Oblast: technikyArea: techniques

Vynález sa týká chemického zloženia dekontaminačného roztoku určeného predovšetkým na dekontamináciu slabofixovaných rádioaktívnych látok na povrchoch stavebných a technologických častí jadrovo-energetických zariadení.The invention relates to the chemical composition of a decontamination solution intended, in particular, for the decontamination of weakly-mounted radioactive substances on the surfaces of constructional and technological parts of nuclear power plants.

Potěrajší stav technikyBACKGROUND OF THE INVENTION

Na odstraňovanie slabofixovanej povrchovéj kontaminácie vzniknutej na povrchu zariadení alebo stavebných častí jadrovo-energetických zariadení únikom, spádom alebo přenesením rádioaktívnych častíc sa používá voda alebo chemické roztoky rózneho zloženia. Ich pósobenie je zabezpečované oplachom, ostrekom připadne súčasným mechanickým čistěním kontaminovaných povrchov. Tieto chemické roztoky obsahujú kyseliny alebo zásady a/alebo tenzidy a/alebo komplexotvorné látky. Nevýhodou používania takýchto viskóznych roztokov je krátká doba pósobenia zložiek dekontaminačných roztokov na dekontaminovaný povrch pri oplachoch a z toho vyplývájúca nízká dekontaminačná účinnost: a produkcia velkého množstva rádioaktívnych odpadov. Z novších zložení dekontaminačných činidiel sú známe pěny s obsahom dekontaminačných zložiek. Nevýhodou dekontaminácie pěnami je ich obmedzená časová stabilita, nedostatočná dekontaminačná účinnost: a ďalšie spracovávanie vzniknutých kvapalných rádioaktívnych odpadov s vysokým obsahom tenzidov.Water or chemical solutions of different compositions are used to eliminate weakly superficial surface contamination formed on the surface of equipment or components of nuclear power installations by leakage, drop or transfer of radioactive particles. Their operation is ensured by rinsing or spraying by simultaneous mechanical cleaning of contaminated surfaces. These chemical solutions contain acids or bases and / or surfactants and / or complexing agents. The disadvantage of using such viscous solutions is the short exposure time of the components of the decontamination solutions to the decontaminated surface during rinsing, resulting in low decontamination efficiency and the production of large amounts of radioactive waste. Foams containing decontamination components are known from the newer compositions of decontamination agents. The disadvantages of foam decontamination are their limited time stability, insufficient decontamination efficiency: and further processing of the resulting high-surfactant liquid radioactive waste.

Podstata vynálezuSUMMARY OF THE INVENTION

Uvedené nedostatky odstraňuje dekontaminačný roztok zložený zo 60 až 85 % hmotnostných glycerínu, 10 až 30 % hmotnostných kyseliny fosforečnej alebo kyseliny dusičnej, 0,5 až 5 % hmotnostných hydrazínu alebo peroxidu vodíka a zvyšného obsahu vody do 100 % hmotnostných. Fyzikálno-chemické vlastnosti roztoku podlá vynálezu zabezpečujú jeho vysokú dekontaminačnú účinnost:, rýchlu a jednoduchú prevádzkovú použitelnost: s možnostou následného spracovania vzniknutých rádioaktívnych odpadov bežne používanou fixačnou technológiou.These drawbacks are eliminated by a decontamination solution composed of 60 to 85% by weight of glycerin, 10 to 30% by weight of phosphoric acid or nitric acid, 0.5 to 5% by weight of hydrazine or hydrogen peroxide and the remaining water content up to 100% by weight. The physico-chemical properties of the solution according to the invention ensure its high decontamination efficiency: fast and simple operational usability: with the possibility of subsequent treatment of the generated radioactive waste with the commonly used fixation technology.

Výhodou dekontaminačného roztoku podlá vynálezu je jeho schopnost dispergovat, rozpúštat nečistoty, usadeniny a nánosy na pevných povrchoch v minimálnom objeme dekontaminačného roztoku a s následnou možnostou zberu a odsávania tohto roztoku pri dodržaní požiadavky minimalizácie množstva rádioaktívnych odpadov.The advantage of the decontamination solution according to the invention is its ability to disperse, dissolve impurities, deposits and deposits on solid surfaces in a minimum volume of decontamination solution and with the consequent possibility of collecting and aspirating this solution while maintaining the requirement of minimizing the amount of radioactive waste.

Příklad vyhotovenia vynálezuDETAILED DESCRIPTION OF THE INVENTION

Roztok obsahujúci 70 % hmotnostných glycerínu, 10 % hmotnostných kyseliny fosforečnej, 3 % hmotnostných hydrazínu a zvyšného obsahu vody do 100 % hmotnostných bol rozstriekaním nanesený na podlahu zamorenú únikom a vysušením rádioaktívneho roztoku. Stieratelná kontaminácia tejto podlahy vykazovala před dekontamináciou hodnoty 1,2 až 3 mGy.hod-1. Po 24 hodinovom pósobení roz toku a jeho následnom odsátí poklesli hodnoty stieratelnej konta— 1 minácie na hodnoty 0,012 až 0,095 mGy.hod . 'A solution containing 70% by weight glycerine, 10% by weight phosphoric acid, 3% by weight hydrazine and the remaining water content up to 100% by weight was sprayed onto the floor contaminated by leakage and drying of the radioactive solution. Wiping contamination of this floor showed values of 1.2 to 3 mGy.hr -1 before decontamination. After 24 hours of multiplication of the solution and its subsequent aspiration, the wipable minus 1 min values decreased to 0.012 to 0.095 mGy.hr. '

PATENTOVÉ NÁROKYPATENT CLAIMS

Claims (1)

Dekontaminačný roztok na odstraňovanie slabofixovanej kontaminácie z povrchov stavebných a technologických častí jadrovoenergetických zariadení, vyznačujúci sa tým že je zložený zo 60 až 85 % hmotnostných glycerínu, 10 až 30 % hmotnostných kyseliny fosforečnej alebo kyseliny dusičnej, 0,5 až 5 % hmotnostných hydrazínu alebo peroxidu vodíka a zvyšného obsahu vody do 100 % hmotnostných.Decontamination solution for the removal of weakly fixed contamination from the surfaces of construction and technological parts of nuclear power plants, characterized in that it consists of 60 to 85% by weight of glycerin, 10 to 30% by weight of phosphoric acid or nitric acid, 0.5 to 5% by weight of hydrazine or peroxide hydrogen and a residual water content of up to 100% by weight.
CS914004A 1991-12-23 1991-12-23 Decontamination solution for the removal of slightly fixed contamination CZ277798B6 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CS914004A CZ277798B6 (en) 1991-12-23 1991-12-23 Decontamination solution for the removal of slightly fixed contamination
SK400491A SK277791B6 (en) 1991-12-23 1991-12-23 Decontaminating solution for elimination of feeblefixed contamination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS914004A CZ277798B6 (en) 1991-12-23 1991-12-23 Decontamination solution for the removal of slightly fixed contamination

Publications (2)

Publication Number Publication Date
CS400491A3 CS400491A3 (en) 1992-07-15
CZ277798B6 true CZ277798B6 (en) 1993-04-14

Family

ID=5381778

Family Applications (1)

Application Number Title Priority Date Filing Date
CS914004A CZ277798B6 (en) 1991-12-23 1991-12-23 Decontamination solution for the removal of slightly fixed contamination

Country Status (2)

Country Link
CZ (1) CZ277798B6 (en)
SK (1) SK277791B6 (en)

Also Published As

Publication number Publication date
CS400491A3 (en) 1992-07-15
SK277791B6 (en) 1995-02-08

Similar Documents

Publication Publication Date Title
JP2009511653A (en) Suctionable gel and its use for decontaminating surfaces
US7718010B2 (en) Method for treating a surface with a treatment gel, and treatment gel
KR100341496B1 (en) Methods and fluids for removal of contaminants from surfaces
JP5214841B2 (en) Compositions, bubbles and methods for surface decontamination
UA44355C2 (en) ORGANOMINERAL DEACTIVATION GEL AND METHOD OF SURFACE DISACTIVATION
EP1299518B1 (en) Method of cleaning using clean room wipes for neutralizing caustic chemicals
CN113563980A (en) Uranium radioactive decontaminant and uranium removing method of uranium-containing device
US6475296B1 (en) Degreasing composition and methods using same
CN115322840A (en) Radioactive contamination decontamination solution and preparation and application thereof
RU2124769C1 (en) Aerosol decontaminant
JPH04277079A (en) Method for neutralization of harmful product and composition for use in said method
US20040163671A1 (en) Degreasing composition useful for degreasing and/or decontaminating solid surfaces
CZ277798B6 (en) Decontamination solution for the removal of slightly fixed contamination
CN112176393B (en) Electrochemical decontamination electrolyte and preparation method and application thereof
KR100679562B1 (en) A removal of radioactive contaminant
JP2016070781A (en) Radioactive contaminant cleaning agent, and cleaning method using the same
DE2333516B2 (en) Decontaminants for metallic surfaces and methods of decontamination using the same
RU2780792C2 (en) Cleaning composition for deactivation of surfaces, in particular radioactive surfaces, and corresponding deactivation method
KR102446895B1 (en) Spraying bubble decontaminating composition and method for bubble decontaminating using the same
GB2090855A (en) Tablets for cleaning artificial teeth in ultrasonic baths
RU2586967C1 (en) Method of decontaminating radioactive-contaminated metal and non-metal surfaces
GB2162532A (en) Decontaminant wash composition
RU2066495C1 (en) Method of atomic power stations equipment in rooms surface decontamination
KR102071670B1 (en) Composition for revmoing deposit on glass
KR20240058373A (en) Decontamination compositon