EP1454327A2 - Materiau de blindage neutronique et de maintien de la sous-criticite a base de resine vinylester - Google Patents
Materiau de blindage neutronique et de maintien de la sous-criticite a base de resine vinylesterInfo
- Publication number
- EP1454327A2 EP1454327A2 EP02804603A EP02804603A EP1454327A2 EP 1454327 A2 EP1454327 A2 EP 1454327A2 EP 02804603 A EP02804603 A EP 02804603A EP 02804603 A EP02804603 A EP 02804603A EP 1454327 A2 EP1454327 A2 EP 1454327A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- material according
- resin
- boron
- inorganic
- resins
- 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.)
- Granted
Links
- 229920005989 resin Polymers 0.000 title claims abstract description 57
- 239000011347 resin Substances 0.000 title claims abstract description 57
- 229920001567 vinyl ester resin Polymers 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 title claims description 69
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 239000011256 inorganic filler Substances 0.000 claims abstract description 11
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 11
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 6
- POYODSZSSBWJPD-UHFFFAOYSA-N 2-methylprop-2-enoyloxy 2-methylprop-2-eneperoxoate Chemical compound CC(=C)C(=O)OOOC(=O)C(C)=C POYODSZSSBWJPD-UHFFFAOYSA-N 0.000 claims abstract description 5
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 5
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 5
- 239000011159 matrix material Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 28
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 15
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 12
- 238000004806 packaging method and process Methods 0.000 claims description 11
- 150000001639 boron compounds Chemical class 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 10
- 229910052796 boron Inorganic materials 0.000 claims description 9
- 239000011701 zinc Substances 0.000 claims description 9
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 8
- 239000003085 diluting agent Substances 0.000 claims description 8
- 229910010272 inorganic material Inorganic materials 0.000 claims description 8
- 230000002285 radioactive effect Effects 0.000 claims description 8
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 8
- 229920002554 vinyl polymer Polymers 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 150000002484 inorganic compounds Chemical class 0.000 claims description 6
- 229910052580 B4C Inorganic materials 0.000 claims description 5
- 229920003986 novolac Polymers 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052582 BN Inorganic materials 0.000 claims description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 2
- 229910021540 colemanite Inorganic materials 0.000 claims description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 2
- 150000004677 hydrates Chemical class 0.000 claims description 2
- 229910011255 B2O3 Inorganic materials 0.000 claims 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000470 constituent Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- -1 boron inorganic compounds Chemical class 0.000 description 5
- 229920001187 thermosetting polymer Polymers 0.000 description 5
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000003758 nuclear fuel Substances 0.000 description 4
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Natural products CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 229920006305 unsaturated polyester Polymers 0.000 description 3
- 229920006337 unsaturated polyester resin Polymers 0.000 description 3
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 description 2
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 2
- 239000004641 Diallyl-phthalate Substances 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- JLTDJTHDQAWBAV-UHFFFAOYSA-N N,N-dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 125000000746 allylic group Chemical group 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- GGSUCNLOZRCGPQ-UHFFFAOYSA-N diethylaniline Chemical compound CCN(CC)C1=CC=CC=C1 GGSUCNLOZRCGPQ-UHFFFAOYSA-N 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- GYVGXEWAOAAJEU-UHFFFAOYSA-N n,n,4-trimethylaniline Chemical compound CN(C)C1=CC=C(C)C=C1 GYVGXEWAOAAJEU-UHFFFAOYSA-N 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 2
- 238000003878 thermal aging Methods 0.000 description 2
- UICXTANXZJJIBC-UHFFFAOYSA-N 1-(1-hydroperoxycyclohexyl)peroxycyclohexan-1-ol Chemical compound C1CCCCC1(O)OOC1(OO)CCCCC1 UICXTANXZJJIBC-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- MMEDJBFVJUFIDD-UHFFFAOYSA-N 2-[2-(carboxymethyl)phenyl]acetic acid Chemical compound OC(=O)CC1=CC=CC=C1CC(O)=O MMEDJBFVJUFIDD-UHFFFAOYSA-N 0.000 description 1
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 description 1
- JIGUICYYOYEXFS-UHFFFAOYSA-N 3-tert-butylbenzene-1,2-diol Chemical compound CC(C)(C)C1=CC=CC(O)=C1O JIGUICYYOYEXFS-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- YZCKVEUIGOORGS-UHFFFAOYSA-N Hydrogen atom Chemical compound [H] YZCKVEUIGOORGS-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000012753 anti-shrinkage agent Substances 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001868 cobalt Chemical class 0.000 description 1
- QAEKNCDIHIGLFI-UHFFFAOYSA-L cobalt(2+);2-ethylhexanoate Chemical compound [Co+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O QAEKNCDIHIGLFI-UHFFFAOYSA-L 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 239000012933 diacyl peroxide Substances 0.000 description 1
- 229920006241 epoxy vinyl ester resin Polymers 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- GEMHFKXPOCTAIP-UHFFFAOYSA-N n,n-dimethyl-n'-phenylcarbamimidoyl chloride Chemical compound CN(C)C(Cl)=NC1=CC=CC=C1 GEMHFKXPOCTAIP-UHFFFAOYSA-N 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 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
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/10—Organic substances; Dispersions in organic carriers
-
- 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
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/10—Organic substances; Dispersions in organic carriers
- G21F1/103—Dispersions in organic carriers
Definitions
- the present invention relates to a neutron shielding material and for maintaining the subcriticality.
- a neutron shielding material are useful in nuclear energy to protect operators from neutron radiation emitted by radioactive products and to prevent the runaway reaction of the neutron formation chain, more particularly when these products contain fissile materials. They can be used in particular as a neutron screen in transport and / or storage packaging for radioactive products, for example nuclear fuel assemblies.
- thermosetting resin can be an unsaturated polyester resin and the inorganic fillers can be heavy metals or compounds thereof.
- GB-A-1 049 890 [2] describes molded articles or neutron absorbing coatings comprising at least 0.3% by weight of boron obtained from a copolymerizable mixture of an unsaturated polyester and a an unsaturated monomer in which either the acid component of the polyester is derived in part from boric acid, or the polymerizable monomer is in part an ester of boric acid.
- Document JP-A-55 119099 [3] describes materials for protection against neutrons also based on unsaturated polyester resin. Such a material has a density of hydrogen atoms of 6.1 ⁇ 10 22 hydrogen atoms per cm 3 , but it does not contain a neutron absorber. Also, it does not ensure the maintenance of the subcriticality of a nuclear fuel transport packaging.
- the present invention specifically relates to a neutron shielding material and for maintaining the subcriticality which has a better corrosion resistance than that of materials based on unsaturated polyester.
- the composite material for neutron shielding and for maintaining the subcriticality comprises a matrix based on vinylester resin and an inorganic filler capable of slowing down and absorbing the neutrons.
- the vinylester resin can be of different types.
- resins obtained by adding a carboxylic acid to an epoxy resin are used.
- the epoxy resins used have a macromolecular pattern of two possible types:
- the carboxylic acid can in particular be acrylic acid or methacrylic acid. Preferably, methacrylic acid is used.
- the vinylester resin is preferably chosen from the group consisting of epoxyacrylate resins, epoxymethacrylate resins, bisphenol A type resins, novolak type resins and halogenated bisphenol A based resins.
- Bisphenol A type epoxyacrylate and epoxymethacrylate resins can correspond to the formula:
- R represents H or CH 3 .
- Novolak type vinyl ester resins can meet the formula:
- non-epoxy vinyl ester resins obtained from isophthalic polyester and urethane, corresponding for example to the formula:
- R is as defined above and U represents a urethane group.
- the composite material of the invention has the following advantages.
- the material is easy to produce because the vinyl ester resin can be poured directly into the mold which will constitute the transport or storage packaging for radioactive products.
- the mass loss of the shielding materials produced with these vinyl ester resins is low at high temperature.
- the vinyl ester resins were transformed into a thermoset material by reaction with a copolymerizable monomer such as styrene and styrene derivatives such as methylstyrene and divinylbenzene, vinyltoluene, methyl methacrylate and the derivatives allylics like diallyl phthalate.
- the material also comprises an inorganic filler capable of slowing down and absorbing neutrons, for example metals, metal compounds, boron, boron compounds.
- this inorganic filler can in particular comprise at least one inorganic boron compound and at least one hydrogenated inorganic compound.
- the boron compounds which can be used belong to the group comprising boric acid H 3 B0 3 , colemanite Ca 2 O ⁇ B 6 H ⁇ 0 , zinc borates Zn 2 O ⁇ 4 , 5 H 7 B 6 , Zn 4 0 8 B 2 H 2 and Zn 2 0nB 6 , boron carbide B 4 C, boron nitride BN and boron oxide B 2 0 3 .
- the composite material of the invention comprises at least one boron compound chosen from zinc borate Zn 2 0 14 ⁇ 5H 7 B6 and boron carbide B 4 C.
- the hydrogenated inorganic compounds which can be used preferably belong to the group of alumina hydrates and magnesium hydroxide.
- the material of the invention can also comprise poly (vinyl acetate) to give the material an anti-shrinkage character.
- This material can also further comprise a hydrogenated organic filler such as melamine, to improve its self-extinguishing properties.
- a hydrogenated organic filler such as melamine
- the inorganic boron compound and the hydrogenated inorganic compound are preferably chosen and their quantities so as to obtain a boron concentration of the material from 8.10 20 to 15.10 21 boron atoms per cm 3 and a hydrogen concentration of 4.10 22 to 6.10 22 atoms per cm 3 .
- the quantities of the various constituents are also chosen in order to obtain characteristics of density, self-extinguishing and thermal conductivity suitable for use in a packaging for transport and / or storage of materials. radioactive.
- this self-extinguishing property is conferred in particular by the presence of hydrogenated and / or boron inorganic compounds, for example alumina hydrate or zinc borate.
- the material should have a low thermal conductivity but sufficient to dissipate the heat from the transported elements such as irradiated fuel elements.
- this material is obtained by casting a mixture of the various constituents and a vinyl diluent, it is important that the amounts of the various constituents are such that the mixture has the property of be able to be cast. Generally, the viscosity of the mixture should not exceed 300 Poises.
- thermosetting vinyl ester resin that is to say including the vinyl diluent, for example styrene.
- the material has a density equal to or greater than 1.6, for example from 1.65 to 1.9.
- the materials of the invention can withstand a minimum use temperature of 160 ° C.
- the material of the invention can be prepared by curing a mixture of the constituents in the vinyl ester resin in solution in a vinyl diluent.
- the subject of the invention is also a process for preparing the composite material described above, which comprises the following steps:
- the vinyl diluent can be, for example, styrene, vinyltoluene, divinylbenzene, methylstyrene, methyl acrylate, methyl methacrylate or an allylic derivative such as diallyl phthalate.
- styrene is used which makes it possible both to dissolve the vinyl ester resin and to ensure its hardening by copolymerization.
- the curing catalysts and accelerators used are chosen from the compounds usually used for curing vinyl ester resins.
- the catalysts can in particular be organic peroxides, for example: - peroxides derived from ketones such as methyl ethyl ketone peroxide, acetylacetone peroxide, methyl isobutyl ketone peroxide, cyclohexanone peroxide and cumene hydroperoxide;
- diacyl peroxides for example benzoyl peroxide optionally in combination with aromatic tertiary amines such as dimethylaniline, diethylaniline and dimethylparatoluidine; and
- dialkyl peroxides such as dicumyl peroxide and ditertiobutyl peroxide.
- the most commonly used accelerators are divalent cobalt salts such as cobalt naphthenate or octoate, and aromatic tertiary amines such as dimethylaniline, dimethylparatoluidine and diethylaniline.
- additives such as crosslinking inhibitors, surfactants and anti-shrinkage agents.
- the procedure is as follows:
- the vinyl ester resin prepolymer + vinyl diluent
- the percentage of charges can range from 60 to 75%. These charges can also play a fire-fighting role.
- the whole is kneaded so as to obtain a mixture perfectly homogeneous.
- the catalyst is added last.
- the homogeneous mixture is then degassed under vacuum (less than 0.01 MPa).
- the viscosity of the mixture must not exceed 300 Poises (the mixture must be pourable).
- the mixture After degassing, the mixture is poured into the desired mold where it is crosslinked to form an insoluble thermosetting material.
- the reaction mechanism is radical, and the reaction is strongly exothermic.
- the hardening time can vary depending on the casting conditions (temperature, catalyst, accelerator and inhibitor ratio). Thus, the gel time can be adjusted by varying the percentages of catalyst and accelerators.
- the freezing time varies from 20 min to 2 h.
- the mold used for curing the resin can be formed directly by the packaging for transporting and / or storing radioactive products.
- the packaging may include peripheral housings in which the mixture is poured.
- Another subject of the invention is a packaging for transporting and / or storing radioactive products comprising a screen formed from the composite material described above.
- Figure 1 shows the mass losses (in%) at 160 and 170 ° C of two materials according to the invention as a function of time (in days).
- a polymerizable mixture is prepared from the vinyl ester resin Dérakane Momentum 470-300, styrene, zinc borate Zn 2 0 ⁇ 4/5 H 7 B 6 and magnesium hydroxide using the proportions given in table 1 appended .
- the following constituents are added to the mixture: - 1% by weight, relative to the mass of resin + styrene, of the accelerator 55028 sold by Akzo, and - 2% by weight, relative to the mass of resin + styrene, of the Butanox M50 catalyst (methyl ethyl ketone peroxide) sold by Akzo.
- a composite material is thus obtained having the following properties:
- the material obtained has satisfactory thermal properties.
- the specific heat Cp is measured by differential enthalpy analysis (DSC 30, METTLER), with a temperature rise rate of 10 ° C / min, over a temperature range from 30 to 200 ° C.
- Cp values are between 1.19 Jg ⁇ . o C "1 and 1.89 Jg " 1 . 0 ⁇ 1 for temperatures between 40 ° C and 180 ° C.
- Thermal conductivity measurements are also carried out for temperatures ranging from 25 ° C to 180 ° C. Values range from 0.75 to 0.91 .m ⁇ K "1 .
- the mechanical properties of the material are also determined by carrying out compression tests at 23 ° C, on test pieces 10 mm in diameter and 20 mm in height, with a Adamel Lhomargy DY26 dynamometer and a test speed of 1 mm / min. The results obtained are as follows:
- the mixture also comprises: 0.9% by weight, relative to the mass of resin, of the NL 49P accelerator sold by Akzo, and
- the hardening is carried out at ambient temperature and a material having the following characteristics is obtained after 25 minutes:
- the material obtained has satisfactory thermal properties.
- the specific heat Cp is measured by differential enthalpy analysis (DSC30, METTLER), with a temperature rise rate of 10 ° C / min, over a temperature range from 40 ° C to 180 ° C. Cp values are between 1.07 and 1.65 Jg "1. O C " 1 .
- the mechanical properties of the material are also determined by carrying out compression tests at 23 ° C. We can thus determine the compression modulus of the material which is 4299 ⁇ 276 MPa.
- Example 2 Given the hydrogen content, the material of Example 2 is particularly suitable for an application in radiation protection.
- the aging tests over 6 months consist in placing samples of the material of dimensions 35 x 25 x 95 mm in an oven at 160 ° C and 170 ° C and monitoring the loss of mass of these samples over time.
- the curves for the evolution of the mass loss of materials (in%) as a function of time (in days) are shown in Figure 1. Fire behavior tests of the materials of Examples 1 and 2 were also carried out.
- Each half-hour fire test at 800 ° C. was carried out on two blocks 240 mm in diameter and 60 mm in height from the materials of Examples 1 and 2.
- the flame was directly in contact with the material while the second blocks were protected by a steel sheet 1 mm thick. In both cases, and for both materials, self-extinguishing is immediate after removal of the torch.
- Example 3 The same procedure is followed as in Example 1 to prepare a neutron shielding material and to maintain the subcriticality from the following mixture:
- the mixture also includes:
- Example 3 Given its high boron content, the material of Example 3 has excellent efficiency in maintaining subcriticality.
- the material of the invention has very advantageous properties for neutron shielding and the maintenance of subcriticality during the transport of nuclear fuel assemblies.
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Sealing Material Composition (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0116036 | 2001-12-12 | ||
FR0116036A FR2833402B1 (fr) | 2001-12-12 | 2001-12-12 | Materiau de blindage neutronique et de maintien de la sous- criticite a base de resine vinylester |
PCT/FR2002/004255 WO2003050822A2 (fr) | 2001-12-12 | 2002-12-10 | Materiau de blindage neutronique et de maintien de la sous-criticite a base de resine vinylester |
Publications (2)
Publication Number | Publication Date |
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EP1454327A2 true EP1454327A2 (fr) | 2004-09-08 |
EP1454327B1 EP1454327B1 (fr) | 2010-06-30 |
Family
ID=8870372
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP02804603A Expired - Lifetime EP1454327B1 (fr) | 2001-12-12 | 2002-12-10 | Materiau de blindage neutronique et de maintien de la sous-criticite a base de resine vinylester |
Country Status (11)
Country | Link |
---|---|
US (1) | US7160486B2 (fr) |
EP (1) | EP1454327B1 (fr) |
JP (1) | JP4732689B2 (fr) |
KR (1) | KR100947528B1 (fr) |
AT (1) | ATE472806T1 (fr) |
AU (1) | AU2002366643A1 (fr) |
DE (1) | DE60236890D1 (fr) |
ES (1) | ES2348387T3 (fr) |
FR (1) | FR2833402B1 (fr) |
WO (1) | WO2003050822A2 (fr) |
ZA (1) | ZA200403576B (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ306407B6 (cs) * | 2014-02-19 | 2017-01-11 | Petr Kraus | Způsob výroby tvarovaného dílu z materiálu odstiňujícího radioaktivní záření a tvarovaný díl vyrobený tímto způsobem |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2830367B1 (fr) * | 2001-10-01 | 2003-12-19 | Transnucleaire | Materiau de blindage neutronique et de maintien de la sous-criticite a base de polyester insature |
FR2846467B1 (fr) * | 2002-10-25 | 2005-01-28 | Cogema Logistics | Materiau de blindage neutronique et de maintien de la sous-criticite, son procede de preparation et ses applications |
US7327821B2 (en) * | 2003-03-03 | 2008-02-05 | Mitsubishi Heavy Industries, Ltd. | Cask, composition for neutron shielding body, and method of manufacturing the neutron shielding body |
US8664630B1 (en) * | 2011-03-22 | 2014-03-04 | Jefferson Science Associates, Llc | Thermal neutron shield and method of manufacture |
FR3030865A1 (fr) | 2014-12-23 | 2016-06-24 | Commissariat Energie Atomique | Utilisation d'un materiau comprenant une matrice solide a base d'un polymere silicone et des charges inorganiques comme materiau neutrophage |
FR3087293B1 (fr) | 2018-10-15 | 2020-10-09 | Tn Int | Materiau composite de blindage neutronique et de maintien de la sous-criticite, son procede de fabrication et ses utilisations |
WO2021252112A1 (fr) | 2020-05-20 | 2021-12-16 | Neutroelectric, Llc | Compositions de protection contre les neutrons et d'absorption des rayonnements |
FR3124018A1 (fr) | 2021-06-10 | 2022-12-16 | Orano Nuclear Packages And Services | Matériau composite de blindage neutronique et de maintien de la sous-criticité, son procédé de fabrication et ses utilisations |
CN113773651A (zh) * | 2021-09-02 | 2021-12-10 | 中海油常州涂料化工研究院有限公司 | 一种常温固化的中子屏蔽材料及其制备方法 |
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BE567962A (fr) * | 1956-11-02 | |||
US3133887A (en) * | 1958-10-06 | 1964-05-19 | Norton Co | Neutron shields and methods of manufacturing them |
US3261800A (en) * | 1960-09-08 | 1966-07-19 | Du Pont | Boron nitride incorporated in polymer products |
GB1049890A (en) * | 1962-11-30 | 1966-11-30 | Albert Ag Chem Werke | Improvements in or relating to resins |
US3609372A (en) * | 1963-06-04 | 1971-09-28 | Marxen Friedrich | Shaped polymeric shield against neutron and gamma radiation |
US3361684A (en) * | 1966-01-18 | 1968-01-02 | Werner H Kreidl | Thermosetting resin matrix containing boron compounds of specific size distribution and method of making |
US4134937A (en) * | 1974-06-12 | 1979-01-16 | Monsanto Research Corporation | Polyester resin composition |
JPS5933874B2 (ja) * | 1979-03-09 | 1984-08-18 | 三井造船株式会社 | 中性子遮蔽材 |
JPS57147095A (en) * | 1981-03-07 | 1982-09-10 | Kimura Kakoki Co Ltd | Neutron shielding material |
EP0108622B1 (fr) * | 1982-11-08 | 1988-03-02 | Mitsubishi Rayon Co., Ltd. | Composition d'une résine synthétique et procédé pour la fabrication de cette composition |
JPS59126296A (ja) * | 1983-01-06 | 1984-07-20 | 三井・デュポン ポリケミカル株式会社 | 積層複合物 |
JPS60194394A (ja) * | 1984-03-15 | 1985-10-02 | 三井化学株式会社 | 中性子遮蔽材 |
JPS61173198A (ja) * | 1985-01-29 | 1986-08-04 | 株式会社神戸製鋼所 | 中性子遮蔽材 |
JPS61213695A (ja) * | 1985-03-19 | 1986-09-22 | 株式会社神戸製鋼所 | 中性子遮蔽材 |
JPS61213694A (ja) * | 1985-03-19 | 1986-09-22 | 株式会社神戸製鋼所 | 中性子遮蔽材 |
JPS61290400A (ja) * | 1985-06-18 | 1986-12-20 | 株式会社神戸製鋼所 | 中性子遮蔽材 |
GB8827531D0 (en) * | 1988-11-25 | 1988-12-29 | Du Pont Canada | Highly filled compositions |
JPH06103357B2 (ja) * | 1989-06-23 | 1994-12-14 | 動力炉・核燃料開発事業団 | 中性子遮蔽材 |
JP2851414B2 (ja) * | 1990-10-31 | 1999-01-27 | 昭和高分子株式会社 | 耐熱性ビニルエステル樹脂組成物 |
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FR2830367B1 (fr) * | 2001-10-01 | 2003-12-19 | Transnucleaire | Materiau de blindage neutronique et de maintien de la sous-criticite a base de polyester insature |
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-
2001
- 2001-12-12 FR FR0116036A patent/FR2833402B1/fr not_active Expired - Fee Related
-
2002
- 2002-12-10 EP EP02804603A patent/EP1454327B1/fr not_active Expired - Lifetime
- 2002-12-10 KR KR1020047008911A patent/KR100947528B1/ko active IP Right Grant
- 2002-12-10 JP JP2003551792A patent/JP4732689B2/ja not_active Expired - Lifetime
- 2002-12-10 WO PCT/FR2002/004255 patent/WO2003050822A2/fr active Application Filing
- 2002-12-10 AU AU2002366643A patent/AU2002366643A1/en not_active Abandoned
- 2002-12-10 AT AT02804603T patent/ATE472806T1/de not_active IP Right Cessation
- 2002-12-10 ES ES02804603T patent/ES2348387T3/es not_active Expired - Lifetime
- 2002-12-10 US US10/497,267 patent/US7160486B2/en not_active Expired - Lifetime
- 2002-12-10 DE DE60236890T patent/DE60236890D1/de not_active Expired - Lifetime
-
2004
- 2004-05-11 ZA ZA2004/03576A patent/ZA200403576B/en unknown
Non-Patent Citations (1)
Title |
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See references of WO03050822A2 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ306407B6 (cs) * | 2014-02-19 | 2017-01-11 | Petr Kraus | Způsob výroby tvarovaného dílu z materiálu odstiňujícího radioaktivní záření a tvarovaný díl vyrobený tímto způsobem |
Also Published As
Publication number | Publication date |
---|---|
AU2002366643A1 (en) | 2003-06-23 |
ATE472806T1 (de) | 2010-07-15 |
FR2833402B1 (fr) | 2004-03-12 |
KR20040079904A (ko) | 2004-09-16 |
JP4732689B2 (ja) | 2011-07-27 |
WO2003050822A2 (fr) | 2003-06-19 |
KR100947528B1 (ko) | 2010-03-15 |
FR2833402A1 (fr) | 2003-06-13 |
US7160486B2 (en) | 2007-01-09 |
WO2003050822A3 (fr) | 2004-02-19 |
US20050012054A1 (en) | 2005-01-20 |
JP2005512101A (ja) | 2005-04-28 |
DE60236890D1 (de) | 2010-08-12 |
ZA200403576B (en) | 2005-06-29 |
ES2348387T3 (es) | 2010-12-03 |
EP1454327B1 (fr) | 2010-06-30 |
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