EP3416173B1 - Procédé de décontamination des déchets radioactifs liquides - Google Patents

Procédé de décontamination des déchets radioactifs liquides Download PDF

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Publication number
EP3416173B1
EP3416173B1 EP17756907.6A EP17756907A EP3416173B1 EP 3416173 B1 EP3416173 B1 EP 3416173B1 EP 17756907 A EP17756907 A EP 17756907A EP 3416173 B1 EP3416173 B1 EP 3416173B1
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EP
European Patent Office
Prior art keywords
radioactive waste
sorbent
liquid radioactive
lrw
sorbents
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.)
Expired - Fee Related
Application number
EP17756907.6A
Other languages
German (de)
English (en)
Other versions
EP3416173A4 (fr
EP3416173A2 (fr
EP3416173B8 (fr
Inventor
Viktor Pavlovich Remez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Future Resources Capital LLP
Original Assignee
Tsyvyan Vadim Pavlovich
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 Tsyvyan Vadim Pavlovich filed Critical Tsyvyan Vadim Pavlovich
Priority to SI201730082T priority Critical patent/SI3416173T1/sl
Publication of EP3416173A2 publication Critical patent/EP3416173A2/fr
Publication of EP3416173A4 publication Critical patent/EP3416173A4/fr
Publication of EP3416173B1 publication Critical patent/EP3416173B1/fr
Application granted granted Critical
Publication of EP3416173B8 publication Critical patent/EP3416173B8/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • G21F9/12—Processing by absorption; by adsorption; by ion-exchange
    • 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

Definitions

  • the invention relates to techniques of processing radioactively contaminated materials and may be used in cleaning liquid radioactive waste (LRW) which accumulate and form during the operation of nuclear power plants and other facilities of the nuclear cycle.
  • LGW liquid radioactive waste
  • RWL radioactive waste liquid
  • Patent No RU2560837 dated November 19, 2013 There is a method of cleaning radioactive waste liquid (RWL) (Patent No RU2560837 dated November 19, 2013 ) which involves dosing of hydrogen peroxide into the distillation residue of RWL, exposure of the said residue to a xenon lamp UV radiation, microfiltration to separate radioactive sludge containing radioactive cobalt, iron and manganese, and adsorption for removal of the radioactive caesium.
  • RWL radioactive waste liquid
  • the processing with a xenon lamp UV pulses is done by impulses whose duration is 10500ms, wherein continuous UV radiation within the range of 190300 nm with the intensity of at least 1 ⁇ 107 W/m2 was used and sorption is carried out at or ferrocyanide ion-selective sorbents.
  • This method is different in that salinity amounts of inorganic and organic substances in the liquid radioactive waste solution that is prepared equals not more than 25 g/l, natural sorbent fraction with particle size of not less than 0.1 microns is selected, separation of the resulting radioactive sorption sorbent from the solution is carried out by pressure filtration through ultra or microporous membrane filter with plasma coating at a pressure drop on the filter of at least 4atm, while radioactive sorbent is discarded from the plasma coating and sent for recycling.
  • a line for purifying liquid radioactive wastes comprising means for feeding and removing LRW, means for feeding, movement and removal of sorbent; monitoring and control means, characterized in that the LRW feeding means are a choke input of LRW placed in the upper part of the moving pipe; means for removing LRW are executed as a drain node; means for feeding, movement and removal of the sorbent are executed as a feeding pipe with a conveyor screw placed inside and a fresh sorbent storage unit placed at the top of the feeding pipe sequentially with a feeding pipe of a LRW purification unit, comprising a moving pipe with a conveyor screw placed inside it, which is connected with the moving pipe at the top and joined with the used-up sorbent drain node pipe at an angle that is placed under the bottom part of the drain node pipe; a container for removal of the used-up sorbent, wherein the fresh sorbent storage unit, the moving pipe and the used-up sorbent drain node pipe are
  • Patent document US 4 235 739 A discloses a method of solidifying liquid radioactive waste by feeding a sorbent into the liquid waste, wherein the sorbent is fed in form of polyvinyl alcohol bags.
  • the goal of the claimed invention is to remove the abovementioned shortcomings.
  • the technical result of the claimed invention consists in decreasing the dose load on service personnel during the process of cleaning liquid radioactive waste, simplifying the liquid radioactive waste cleaning process, and enhancing the reliability and safety of the liquid radioactive waste conditioning process.
  • a method for cleaning liquid radioactive waste which includes feeding liquid radioactive waste into an storage tank, adding sorbents into the stated storage tank, mixing the liquid radioactive waste and sorbents in the tank, separating the used-up sorbent from the solution, wherein the sorbent is fed into the storage tank in a package made of materials which are soluble in an aqueous medium.
  • Package can be made of water-soluble polymer film, specifically from polyvinyl alcohol.
  • the separation of the used-up sorbent from the solution can be carried out by filtrating the suspension, composed of the sorbent and solution, through the tank which is equipped with at least one filter element at its exit. Moreover, the obtained suspension can be sent back to additional cleaning, while the used-up sorbent will be dumped in the storage tank, placed in the protected concrete block and sent off to be cemented.
  • These blocks are the final result of LRW processing and can be sent directly for burial or can be used as construction materials for building storage facilities. Therefore, implementation of this method excludes the usage of complex in operation and requiring specialized maintenance equipment, which allows to significantly improve the level of radiological protection of the service personnel in the process of conditioning liquid radioactive waste.
  • the tank was pumped with 12M 3 of LRW of the aforementioned composition and then 30kg of selective sorbent in a form of dry powder based on manganese dioxide, placed in a package made of polyvinyl alcohol, were added, and 30kg of powder sorbent based on copper sulfide, also placed in a package made of polyvinyl alcohol, were added after that.
  • the particle size of the powder sorbents did not exceed 0.5mm.
  • LRW was directed to storage tank, featuring two filter elements with a pore size of 0,4 and 0.1mm.
  • a filtrate separated from the powder sorbent was passed through a storage tank, comprising fifty kilograms of granular selective sorbent based on manganese dioxide.
  • the total specific activity of isotopes, remaining in LRW accounted for not more than 10 Bq/l.
  • the tank containing 10M 3 of LRW was consecutively pumped with 20kg of selective sorbents in a form of dry powder (with a particle size of less than 0.3mm), placed in a package made of polyvinyl alcohol, of the following composition: copper ferrocyanide, magnesium phosphate and zirconium hydroxide.
  • LRW was pumped through two storage tanks with a pore size of 0,2mm in the first filter and 0.1mm in the second one. Afterwards, a filtrate was passed through three consecutively connected tanks, comprising 60L of mechanical mixture of selective sorbents with granular size of 3mm.
  • the total specific activity of isotopes, remaining in LRW made up not more than 10 Bq/l.
  • the claimed invention allows to decrease the dose load on service personnel during the cleaning process of liquid radioactive waste and to significantly simplify the cleaning process of liquid radioactive waste.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Claims (2)

  1. Méthode de nettoyage de déchets radioactifs liquides, la méthode comprenant des étapes de chargement des déchets radioactifs liquides à l'intérieur d'un réservoir de stockage, d'ajout de sorbants dans ledit réservoir de stockage, de mélange des déchets radioactifs liquides et des sorbants dans le réservoir de stockage pour former une solution, de séparation de la solution des sorbants épuisés, dans laquelle les sorbants sont introduits à l'intérieur du réservoir de stockage dans un emballage issu de matériaux qui sont solubles dans un milieu aqueux.
  2. Méthode selon la revendication 1, dans laquelle l'emballage est fait d'alcool polyvinylique.
EP17756907.6A 2016-02-12 2017-02-10 Procédé de décontamination des déchets radioactifs liquides Expired - Fee Related EP3416173B8 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201730082T SI3416173T1 (sl) 2016-02-12 2017-02-10 Postopek čiščenja tekočih radioaktivnih odpadkov

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2016104838A RU2616972C1 (ru) 2016-02-12 2016-02-12 Способ очистки жидких радиоактивных отходов
PCT/RU2017/000068 WO2017146611A2 (fr) 2016-02-12 2017-02-10 Procédé de décontamination des déchets radioactifs liquides

Publications (4)

Publication Number Publication Date
EP3416173A2 EP3416173A2 (fr) 2018-12-19
EP3416173A4 EP3416173A4 (fr) 2019-03-20
EP3416173B1 true EP3416173B1 (fr) 2019-06-19
EP3416173B8 EP3416173B8 (fr) 2019-08-14

Family

ID=58642793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17756907.6A Expired - Fee Related EP3416173B8 (fr) 2016-02-12 2017-02-10 Procédé de décontamination des déchets radioactifs liquides

Country Status (8)

Country Link
EP (1) EP3416173B8 (fr)
EA (1) EA033890B1 (fr)
ES (1) ES2745425T3 (fr)
HU (1) HUE046155T2 (fr)
LT (1) LT3416173T (fr)
RU (1) RU2616972C1 (fr)
SI (1) SI3416173T1 (fr)
WO (1) WO2017146611A2 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2720342B2 (de) * 1977-05-06 1979-08-30 Steag Kernenergie Gmbh, 4300 Essen Verfahren und Anlage zum Verfestigen von pumpfähigen radioaktiven Abfällen in einem Deponiebehälter
IT1157390B (it) * 1978-10-27 1987-02-11 Cnen Procedimento ed impianto per la depurazione continua di fluidi contaminati e per il condizionamento dei concentrati da cio' risultanti
RU2065629C1 (ru) * 1993-07-26 1996-08-20 Санкт-Петербургский государственный университет технологии и дизайна Способ сорбционного извлечения цезия из природных и технологических вод
JPH0915389A (ja) * 1995-06-27 1997-01-17 Japan Atom Energy Res Inst 放射性核種の吸着材及びその製造方法及び放射性廃棄物の減容処理方法
CN1732036A (zh) * 2002-12-24 2006-02-08 迈可罗泰克医学控股股份有限公司 聚乙烯醇过滤器介质
RU40817U1 (ru) * 2004-04-22 2004-09-27 Чечельницкий Геннадий Моисеевич Линия очистки жидких радиоактивных отходов (жро)
RU2268513C1 (ru) * 2004-12-28 2006-01-20 Закрытое акционерное общество "РАОТЕХ" Способ переработки жидких радиоактивных отходов
JP6335487B2 (ja) * 2013-11-20 2018-05-30 株式会社クラレ 放射性セシウム除染方法及び放射性セシウム除染シート
EP3160533B1 (fr) * 2014-06-24 2020-08-12 Medtronic Inc. Poche de sorbant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
HUE046155T2 (hu) 2020-02-28
ES2745425T3 (es) 2020-03-02
EP3416173A4 (fr) 2019-03-20
EA201800339A1 (ru) 2019-01-31
WO2017146611A2 (fr) 2017-08-31
EA033890B1 (ru) 2019-12-05
SI3416173T1 (sl) 2019-11-29
WO2017146611A3 (fr) 2017-10-26
EP3416173A2 (fr) 2018-12-19
LT3416173T (lt) 2019-09-25
EP3416173B8 (fr) 2019-08-14
RU2616972C1 (ru) 2017-04-19

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