Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials
Radiation safety features of polystyrene steel composite materials were found by means of mathematical modeling techniques. We determined the attenuation of the gamma quantum flux passing through a solid protective layer compared with those attenuation for the bulk protective layer. Change of frac...
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| Zitieren: | Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials / V.F. Klepikov, E.M. Prokhorenko, V.V. Lytvynenko, A.A. Zakharchenko, M.A. Hazhmuradov // Вопросы атомной науки и техники. — 2016. — № 3. — С. 123-127. — Бібліогр.: 11 назв. — англ. |
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irk-123456789-1153732017-04-04T03:02:32Z Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials Klepikov, V.F. Prokhorenko, E.M. Lytvynenko, V.V. Zakharchenko, A.A. Hazhmuradov, M.A. Экспериментальные методы и обработка данных Radiation safety features of polystyrene steel composite materials were found by means of mathematical modeling techniques. We determined the attenuation of the gamma quantum flux passing through a solid protective layer compared with those attenuation for the bulk protective layer. Change of fractional attenuation of the dose absorbed by 10 and 50 mm thick composites is calculated. Dependence between protective properties of composite and its blend composition was studied. Modifications of technical process of composite materials production were performed. Rotation speed of agitator system was found. It was defined that heating time of polystyrene steel mix is longer than heating time of polystyrene tungstic one. Degree of mix heating and integrity of thermic field on its surface was controlled with the help of IR radiometry methods. Рассчитаны радиационно-защитные характеристики полистирол-стальных композиционных материалов. Дано сравнение эффективности ослабления потока гамма-квантов в случаях сплошного защитного слоя и защитного слоя, изготовленного в виде шариков диаметром 2 мм. Рассчитано изменение относительного ослабления поглощѐнной дозы композитами толщиной 10 и 50 мм. Исследована зависимость между защитными свойствами композита и его компонентным составом. Выполнена доработка технологического про- цесса изготовления композиционных материалов. Найдены скорости вращения системы размешивания. Установлено, что время нагрева полистирол-стальной смеси больше, чем время нагрева полистиролвольфрамовой. При помощи методов ИК-радиометрии контролировали степень нагрева смеси и однородность теплового поля по еѐ поверхности. Розраховані радіаційно-захисні характеристики полістирол-стальних композиційних матеріалів. Надано порівняння ефективності послаблення потоку гамма-квантів у випадках суцільного захисного шару і захисного шару, виготовленого у вигляді кульок діаметром 2 мм. Розрахована зміна відносного послаблення поглиненої дози композитами завтовшки 10 і 50 мм. Досліджена залежність між захисними властивостями композиту і його компонентним складом. Виконано доопрацювання технологічного процесу виготовлення композиційних матеріалів. Знайдені швидкості обертання системи розмішування. Встановлено, що час нагріву полістирол-сталевої суміші більший, ніж час нагріву полістирол-вольфрамової суміші. За допомогою методів ІЧ-радіометрії контролювали ступінь нагріву суміші і однорідність теплового поля по її поверхні. 2016 Article Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials / V.F. Klepikov, E.M. Prokhorenko, V.V. Lytvynenko, A.A. Zakharchenko, M.A. Hazhmuradov // Вопросы атомной науки и техники. — 2016. — № 3. — С. 123-127. — Бібліогр.: 11 назв. — англ. 1562-6016 PACS: 81.05.Qk, 87.55.K+N http://dspace.nbuv.gov.ua/handle/123456789/115373 en Вопросы атомной науки и техники Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Экспериментальные методы и обработка данных Экспериментальные методы и обработка данных |
| spellingShingle |
Экспериментальные методы и обработка данных Экспериментальные методы и обработка данных Klepikov, V.F. Prokhorenko, E.M. Lytvynenko, V.V. Zakharchenko, A.A. Hazhmuradov, M.A. Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials Вопросы атомной науки и техники |
| description |
Radiation safety features of polystyrene steel composite materials were found by means of mathematical modeling
techniques. We determined the attenuation of the gamma quantum flux passing through a solid protective layer
compared with those attenuation for the bulk protective layer. Change of fractional attenuation of the dose absorbed
by 10 and 50 mm thick composites is calculated. Dependence between protective properties of composite and its
blend composition was studied. Modifications of technical process of composite materials production were performed.
Rotation speed of agitator system was found. It was defined that heating time of polystyrene steel mix is
longer than heating time of polystyrene tungstic one. Degree of mix heating and integrity of thermic field on its surface
was controlled with the help of IR radiometry methods. |
| format |
Article |
| author |
Klepikov, V.F. Prokhorenko, E.M. Lytvynenko, V.V. Zakharchenko, A.A. Hazhmuradov, M.A. |
| author_facet |
Klepikov, V.F. Prokhorenko, E.M. Lytvynenko, V.V. Zakharchenko, A.A. Hazhmuradov, M.A. |
| author_sort |
Klepikov, V.F. |
| title |
Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials |
| title_short |
Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials |
| title_full |
Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials |
| title_fullStr |
Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials |
| title_full_unstemmed |
Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials |
| title_sort |
application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials |
| publisher |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| publishDate |
2016 |
| topic_facet |
Экспериментальные методы и обработка данных |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/115373 |
| citation_txt |
Application of methods of mathematical modeling for determining of radiation-protective characteristics of polystyrene-metal composite materials / V.F. Klepikov, E.M. Prokhorenko, V.V. Lytvynenko, A.A. Zakharchenko, M.A. Hazhmuradov
// Вопросы атомной науки и техники. — 2016. — № 3. — С. 123-127. — Бібліогр.: 11 назв. — англ. |
| series |
Вопросы атомной науки и техники |
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| fulltext |
ISSN 1562-6016. ВАНТ. 2016. №3(103) 123
APPLICATION OF METHODS OF MATHEMATICAL MODELING FOR
DETERMINING OF RADIATION-PROTECTIVE CHARACTERISTICS
OF POLYSTYRENE-METAL COMPOSITE MATERIALS
V.F. Klepikov
1
, E.M. Prokhorenko
1
, V.V. Lytvynenko
1
, A.A. Zakharchenko
2
, M.A. Hazhmuradov
2
1
Institute of Electrophysics and Radiation Technologies of NASU, Kharkov, Ukraine;
2
National Science Center “Kharkov Institute of Physics and Technology”, Kharkov, Ukraine
Radiation safety features of polystyrene steel composite materials were found by means of mathematical model-
ing techniques. We determined the attenuation of the gamma quantum flux passing through a solid protective layer
compared with those attenuation for the bulk protective layer. Change of fractional attenuation of the dose absorbed
by 10 and 50 mm thick composites is calculated. Dependence between protective properties of composite and its
blend composition was studied. Modifications of technical process of composite materials production were per-
formed. Rotation speed of agitator system was found. It was defined that heating time of polystyrene steel mix is
longer than heating time of polystyrene tungstic one. Degree of mix heating and integrity of thermic field on its sur-
face was controlled with the help of IR radiometry methods.
PACS: 81.05.Qk, 87.55.K+N
INTRODUCTION
One of the conditions of safe operation of nuclear
facilities is effective functioning of all systems and ele-
ments of radiation protection. By creating radiation pro-
tection facilities, radiation-absorbing materials are im-
plemented. At the present time, a significant number
radiation protection materials with different properties
are developed and used.
Concept of modern protective materials includes
their multipurpose function. It includes: main character-
istics (radiation protection) and additional properties
raising from conditions of materials operation.
Creation of new types of radiation protection materi-
als is based on combining materials with the most neces-
sary properties. The obtained composites have a row of
characteristics that base materials do not have.
Composite materials made of polystyrene reinforced
with powdered aluminum [1 - 3] were developed. Different
protective properties were implemented for increasing pro-
tective properties. Finding radiation protection characteris-
tics was performed by means of numerical count [4 - 6]. Use
of these methods was studied in this work.
Objective of this work is calculation of radiation
protection characteristics of polystyrene metal compo-
site materials, studying effectiveness of attenuation
gamma quantum flow for composite materials with dif-
ferent mass profile of components and determination of
optimal composite component proportions.
MAIN PART
By solving the issue of protection from ionization
radiation it is necessary to solve the issue of protection
from alpha and beta particles flaxes, neutron flux and
gammas radiation. Maximum protection from neutrons
is reached by using light elements (В, Н, N) having
large cross-sections of absorption. We considered pro-
tective materials used for protection from gamma and
X-ray radiation. In this case implementation of elements
with large atomic weight (Pb, W).
Development of radiation protection composite ma-
terials of different composition was performed. Polysty-
rene metal composites were proposed. By production of
composites polystyrene was reinforced with powdered
aluminum. This procedure allows obtaining base with
high duty since polystyrene moistens aluminum well. In
works [1, 2, 7, 8] composite materials where base of
composite was filled with radiation protection additive
agent. As additive agent powdered tungsten was used.
Protective material is produced in the form of balls with
2 and 5 mm diameter. This allows fulfillment of filling
out protective layer. Use of protection layer as balls give
possibility to fill out the whole volume of protection, to
make complex protective structures. Protective layer
also has higher flexibility.
Composite materials were produced at KUASY
1400/250 thermoplastic apparatus. This equipment al-
lows production of multicomponent reinforced products
of thermostatic polymers. Since in our case components
are mixed in a tank of preliminary heating, we had to
install additional heating equipment. Control of mix
heating uniformity and uniformity of components mix-
ing was performed by Ti-814 [2, 7, 9] thermovisor. It is
sensitive at 0.08°С. It is enough for fixation and defin-
ing nonuniformity of temperature field distribution on
mix surface.
Characteristics of hardness and thermal conductivity
of received composite were studied [10]. Lowering of
thermal current for composite material used in the form
of balls in comparison to solid ones is shown. Thermal
properties get worse with decreasing of polystyrene com-
ponent composite in the composition. Thermal conductiv-
ity of material also depends on proportion of different
kinds of metal component in composite composition.
Thermal properties get worse by increasing of aluminum
component. Thermal properties hardly depend on size of
metal component grains. In our case aluminum grains
have size of 10…20 and 30…40 m. Tungsten grains
size was: 30…40, 60…80, 180…210 m. By studying
polystyrene metal composite materials hardness values
were found. It is shown that hardness of materials de-
pends on quantity of metal component and size of sepa-
rate grains. Hardness increases with increasing metal
additive agent. However, in case of significant decrease
of polystyrene component strength of balls can lower.
Hardness also increases with increase of grain size.
In works [1, 2, 7, 8] radiation protection properties of
composites with tungsten additive agent were studied.
Results were received by means of mathematical model
approach. Interaction processes of radiation with sub-
stance were performed with the help of program package.
ISSN 1562-6016. ВАНТ. 2016. №3(103) 124
Primary development of this package is provided in
work [4], further development – in works [5, 6].
Radiation protection characteristics of composite
materials made in the form of solid layer and in the
form of balls are received. Protective properties for
composite layer in the form of balls decrease in propor-
tion to the degree of protection layer filling. Numeric
data received are well agreed with experimental results
[3, 11].
Simulation was performed for different kinds of pol-
ystyrene metal composite materials. Performance of
numeric modeling allowed defining gamma energies
what are available during their full absorption. Areas of
half attenuation of the dose absorbed. All calculations
were made for protection layer 10 mm thick. This thick-
ness of protection layer is defined by its use in individu-
al protection sets. Individual protection complexes are
used for wearing by service personal. That is why they
do not have limitations for weight and thickness of pro-
tection layer.
Based on dependence of received absorption proper-
ties optimal compositions of component composite ma-
terials were defined. Materials with maximum absorp-
tion properties were found, but they have significant
weight. Analysis of proportion of material weight and
its radiation protection properties was conducted. Ac-
cording to it С080403, С080304, С080601 composite
materials suit for individual protection sets. They con-
tain 53% of polystyrene volume and 47% of metal com-
ponent volume. This quantity of polystyrene allows full
covering of metal grains. This way maximum hardness
of material is gained. Tungsten amount varies from 20%
to 45% of volume which provides opportunity to receive
high radiation protection performances.
The second material used as radiation protection ad-
dition was St3sp steel. Production technology of com-
posite material with addition of powdered steel differs
from technology of composites with tungsten addition.
Differences are connected with size of steel particles, its
form. Size of particles is 180…210 m. They had rec-
tangular shape. Weight is lower that weight of tungsten.
In case of lower weight it is necessary to decrease speed
of rotation to 20 revolutions. The following modifica-
tion was time of mix heating. Thermal production of
tungsten is 155 W/m·K. Thermal production of St3sp
steel is 48 …52 W/m·K which is three times lower than
that of tungsten.
Accordingly it is necessary to select temperature
modes, speed of mix feed. We should notice that it is
necessary to conduct selection of operation modes (rota-
tion speed, heating time, interval of component feed) for
each kind of composite.
By its radiation protection properties these composites
have lower characteristics than composites with tungsten.
Study of absorbed dose change for certain kinds with
component steel was performed in works [2, 8, 10]. It
was found out that in case protective layer thickness is
10 mm only gammas with energy up to 10 keV are ab-
sorbed. However by some characteristics these compo-
sites differ in a better way in compared to composites
containing tungsten. Since thermal conductivity of steel is
three times lower than thermal conductivity of tungsten,
thermal conductivity of composition material is also
lower. Steel particles have shape of rectangular blocks
(sphere tungsten particles) and that is why hardness and
strength of composites is higher [10]. Taking this into
account we can define the protective structures where
these composites are the most effective. It was defined
that this are fixed protective structures.
Use of granular filling allows significant reduction
of construction period of protection structures. There
appears possibility of quick change of shape, size and
location. If necessary granular filling allows disman-
tling.
Use of granular filling allows creation of temporary
structures that will provide opportunity to increase safe-
ty by repair works, maintenance, accident recovery op-
erations.
RESEARCH AND DISCUSSION
OF THE RESULTS
By production of polystyrene metal composite mate-
rials with addition of steel polystyrene (PSM-115),
powdered aluminum (TU 1791-99-024-99), St3sp pow-
dered steel were used. Size of aluminum particles is
30…40 m, of steel particles – 180…210 m. These
particles are evenly distributed over composite amount.
Steel particles had rectangular shape. Distribution of
particles was chaotic. There is no selected direction of
particles by composite. Cross-section of Fe080601
composite material is presented in Fig. 1.
Fig. 1. Structure of composite material Fe080601
We can see composite structure in Fig. 1. Steel parti-
ciples are marked with red markers (rectangles). Alumi-
num particles are marked with black markers. They have
shape close to spherical one. They are also located ran-
domly. Polystyrene has dark color. It fills out space be-
tween particles. This kind of polystyrene and metal com-
ponents distribution provides possibility to consider com-
posite material as homogenous material with reduced
density.
Interaction processes of radiation current with a lay-
er of protective substance were performed my means of
Geant 4 v4.9.6p04 [6] program package. Results re-
ceived by means numeral calculation are close to exper-
imental data. One of parameters taken into account in
process of modeling is density of protective material.
We use definition of reduced density including weight
of all components. Therefore it is necessary to receive
material with maximum possible even distribution of all
components over its amount. In our case, it is confirmed
from the picture presented in Fig. 1. You can see from
the figure that one of particles is turned to cross-section
ISSN 1562-6016. ВАНТ. 2016. №3(103) 125
surface with its side surface, the second one with its end
surface. It confirms their chaotic arrangement inside of
composite.
By calculations different densities of protection ma-
terial were considered. The second parameter is energy
of grammas. Grammas with energies up to 1.5 MeV
were considered. Composites of various thickness were
also studied.
Since by calculations composite weight is one of pa-
rameters, we will present weight composition of these
composites in Table.
Mass components of composite materials (PS-Fe-Al)
Material Polystyrene
(PS)
mas. %
Steel
(Fe+),
mas. %
Aluminum
(Al),
mas. %
Fe100401 24.37 69.65 5.98
Fe100104 37.09 26.50 36.41
Fe080403 18.20 65.04 16.76
Fe080601 15.00 80.40 4.60
Fe080106 26.78 23.92 49.30
Fe050505 9.43 67.41 23.16
Fe050109 14.60 20.87 64.52
Fe050901 6.97 89.61 3.42
After calculations we receive attenuation curve of
dose absorption depending on energy of grammas, com-
ponent composition of composites and their structure.
Analysis of received curves allows selection of suitable
radiation protection composite for each concrete case.
Tissue-mimicking phantom located after protection
layer is used as a target. Protection layer can have differ-
ent structure (solid, filled with balls), different dimen-
sions. We define absorbing characteristics of protection
layer by value of relative decrease of absorbed dose of
gamma radiation
( )
,air
air
D D
Q
D
where Q – relative decrease of absorbed dose; Dair –
estimated dose absorbed by tissue-mimicking phantom
in the air without protective layer; D – estimated dose
received by phantom located after protection layer.
Results of numerical modeling were presented on
Figs. 2-4. At first, protection layers that had thickness of
10 mm were considered. Selection of this size was due
to the fact that composite materials were used in NDC
kits. Fig. 2 presents diagrams for composite materials
with addition of iron.
Result of composite materials study of two kinds are
presented. Attenuation of absorbed dose was considered
depending on material composition. Protection layer
was made of solid composite material and of balls. Size
of balls is 2 mm. Lines with markers without filling
mark absorbing properties of solid composite materials.
Lines with painted markers mark materials made in the
shape of balls. Materials differ by subgroups significant-
ly. Effectiveness of gamma radiation absorption is high-
er for solid material. So, with gamma energy of 80 keV
solid protection layer absorbs 80% gammas. And layer
made of the same material, but in the shape of balls
60%. This principle also works for other kinds of com-
posite materials.
Fig. 2. Change the relative weakening of the absorbed
dose of gamma radiation of different composites,
depending on the energy of the gamma-rays.
(Composite material of 10 mm thickness)
As for case with composite with tungsten component
[7], radiation absorption properties depend on quantity
of heavy metal components. In our case on steel. Ab-
sorption curves of composites with large content of steel
that is higher than those having a little of block compo-
nent. Effectiveness of gamma absorption does not de-
pend much on amount of aluminum component and
slightly depends on polystyrene component. It is con-
firmed by curves corresponding to Fe080403 (marker –
triangle upside down) and Fe100401 (marker – rhom-
bus) composites. Both these composites have similar
amount of steel component. They differ by polystyrene
and aluminum component. Fe080403 composite con-
tains more aluminum in 2/15 of volume part and less
polystyrene in 2/15 of volume part than Fe100401 com-
posite. Insignificant difference of curves is observed
with gamma energies of less than 60 keV. This principle
works for solid protection as well as for protection with
granular filling. For composite materials made in the
shape of balls gammas with energy of 50 keV are well
absorbed. Then radiation protection characteristics
worsen rapidly. And at 122 keV (57Со) line there is a
half absorption. A significant amount of medical and
research devices operates in this range of energies.
Therefore, protection layer which is 10 mm thick and is
made in the shape of balls for composite with steel
component cannot ensure enough protection from ioni-
zation radiation. At energy of gammas of 1 MeV dose
rate decreases no less than by 10%. Also, no more than
2% of 1.33 MeV (60Со) radiation line is absorbed.
Composite materials with steel component can be
used by creation of temporal protection structures. Their
range of application is wider. Use of thicker composite
material is possible. It was proposed to consider protec-
tion layer with thickness of 50 mm. Comparison of radi-
ation protection properties of 10 and 50 mm thick com-
posites was performed by mean of numerical approach-
es. Results of numerical modeling were presented in
Fig. 3.
ISSN 1562-6016. ВАНТ. 2016. №3(103) 126
Fig. 3. Change the relative weakening of the absorbed
dose of gamma radiation of different composites,
depending on the energy of the gamma-rays.
(Composite material of 10 and 50 mm thickness)
It is seen from Fig. 3 that effectiveness of composite
material with 50 mm thick protection layer is signifi-
cantly higher than for 10 mm thick materials. All curves
are united into two groups by their form. Fe100104
composite having the lowest values stands separately. It
is connected with little amount of steel component and
with maximum amount of aluminum and polystyrene
components. Composites (50 mm) have soft attenuation
of protective properties. At 100 keV energy from 95 to
98% of falling gammas are absorbed. Accordingly, at
122 keV (57Со) from 90 to 95%. Half attenuation of
dose is within energy interval of 300…700 keV gam-
mas. 50 mm thick protection layer allows getting rid of
gamma radiations of most domestic and industrial gaug-
es. However, for high intensity radiation sources (60Со)
with 1.33 MeV line more than 20% of primary current
of gammas is absorbed.
For the case when thickness of protection layer is
50 mm, structure of protection layer is balls, mathemati-
cal modeling of absorbing properties depending on
composition of composite material was performed. Re-
sults of numerical calculation are presented in Fig. 4.
Using curves stated in Fig. 4 we will conduct analy-
sis of gamma current attenuation effectiveness.
Fe050901 composite has maximum absorbing proper-
ties. It contains nine volume parts of steel. The follow-
ing group is curves corresponding with Fe080601 and
Fe050505 composites containing 6 and 5 parts of steel.
Then Fe080403, Fe100401 composites follow. The have
the same composition of steel component, but Fe080403
composite has two more aluminum parts than Fe100401
composite. Therefore, its radiation protection properties
are 1.5% higher. All composites of this group attenuate
dose of gammas by 90…98% with 100 keV energies.
Also from 80 to 97% of 122 keV (57Со) line are ab-
sorbed.
With increase of gamma energy absorption effec-
tiveness gets worse. Since half attenuation in case of
210 keV energy is typical of Fe080403, Fe100401 com-
posites. Fe080601 and Fe050505 composites have 50%
attenuation in case of 400 keV energy. And maximum
characteristics for Fe050901 composite are 800 keV. In
case, gamma energy value is 1 MeV, attenuation is from
30 to 40% of primary current intensity.
Fig. 4. Change the relative weakening of the absorbed
dose of gamma radiation of different composites,
depending on the energy of the gamma-rays.
(The composite material of 50 mm thickness)
Fe050109, Fe080106, Fe100104 composites have
the most low values of protection. They contain only
one volume part of steel. It is seen from Fig. 4 that their
characteristics slightly differ. Attenuation is in propor-
tion to the amount of aluminum component. Half atten-
uation of these composite materials arises in case of
120 keV gamma energy. I.e., at the energy of 122 keV
(57Со) line. Therefore, use of composite materials of this
group is effective only in the field of low (up to 80 keV)
flow of gammas.
When selecting required composite material it is
necessary to take into account its different physical
characteristics. In works [7 - 10], there are dependences
of hardness, thermal conductivity of composite materi-
als. Based on these data we can conclude that
Fe080601, Fe080403, Fe100401 are the most suitable
for NDC kits. Fe050901 and Fe050505 composites have
maximum radiation protection properties. However,
their production is the most difficult and expensive.
Therewith, because of large amount of metal component
they have the lowest hardness values. The most effec-
tive use of them is in construction structures, addition to
concrete. Fe080106, Fe100104 composites are easy to
make, they have high strength, mobility properties.
Therefore, they can be used in fixed protection struc-
tures where there are no limitations for size and weight
of protection layer.
Performance of works on mathematical modeling of
absorption processes of ionization radiation provides op-
portunity to define suitability of composite material and
its main characteristics. After analysis of alteration curves
in regards to attenuation of absorbed dose of gamma radi-
ation, we can select kind of required composite.
CONCLUSIONS
1. By means of numerical methods values of relative
attenuation of absorbed gamma radiation dose with use
of polystyrene metal composites were obtained.
2. We analyzed the radiation protection properties of
composite materials with steel component (PS-Fe-Al).
Absorbing characteristics for three groups of compo-site
materials with steel component were studied. Grouping
was performed by the amount of metal polystyrene
component.
ISSN 1562-6016. ВАНТ. 2016. №3(103) 127
3. Compositions of polystyrene and steel composite
materials having maximum absorbing properties were
found.
4. It is demonstrated that Fe080601, Fe100401 com-
posites are the most effective in use of NDC kits.
5. For polystyrene and metal composites with addi-
tion of steel (PS-Fe-Al) improvement of their produc-
tion technology was performed.
6. Modification of IR radiometric heating diagnos-
tics methods was performed.
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Article received 15.02.2016
ПРИМЕНЕНИЕ МЕТОДОВ МАТЕМАТИЧЕСКОГО МОДЕЛИРОВАНИЯ ДЛЯ НАХОЖДЕНИЯ
РАДИАЦИОННО-ЗАЩИТНЫХ ХАРАКТЕРИСТИК ПОЛИСТИРОЛ-МЕТАЛЛИЧЕСКИХ
КОМПОЗИЦИОННЫХ МАТЕРИАЛОВ
В.Ф. Клепиков, Е.М. Прохоренко, В.В. Литвиненко, А.А. Захарченко, М.А. Хажмурадов
Рассчитаны радиационно-защитные характеристики полистирол-стальных композиционных материалов.
Дано сравнение эффективности ослабления потока гамма-квантов в случаях сплошного защитного слоя и
защитного слоя, изготовленного в виде шариков диаметром 2 мм. Рассчитано изменение относительного
ослабления поглощѐнной дозы композитами толщиной 10 и 50 мм. Исследована зависимость между защит-
ными свойствами композита и его компонентным составом. Выполнена доработка технологического про-
цесса изготовления композиционных материалов. Найдены скорости вращения системы размешивания.
Установлено, что время нагрева полистирол-стальной смеси больше, чем время нагрева полистирол-
вольфрамовой. При помощи методов ИК-радиометрии контролировали степень нагрева смеси и однород-
ность теплового поля по еѐ поверхности.
ЗАСТОСУВАННЯ МЕТОДІВ МАТЕМАТИЧНОГО МОДЕЛЮВАННЯ ДЛЯ ЗНАХОДЖЕННЯ
РАДІАЦІЙНО-ЗАХИСНИХ ХАРАКТЕРИСТИК ПОЛІСТИРОЛ-МЕТАЛЕВИХ
КОМПОЗИЦІЙНИХ МАТЕРІАЛІВ
В.Ф. Клепіков, Є.М. Прохоренко, В.В. Литвиненко, О.О. Захарченко, М.А. Хажмурадов
Розраховані радіаційно-захисні характеристики полістирол-стальних композиційних матеріалів. Надано порі-
вняння ефективності послаблення потоку гамма-квантів у випадках суцільного захисного шару і захисного шару,
виготовленого у вигляді кульок діаметром 2 мм. Розрахована зміна відносного послаблення поглиненої дози
композитами завтовшки 10 і 50 мм. Досліджена залежність між захисними властивостями композиту і його ком-
понентним складом. Виконано доопрацювання технологічного процесу виготовлення композиційних матеріалів.
Знайдені швидкості обертання системи розмішування. Встановлено, що час нагріву полістирол-сталевої суміші
більший, ніж час нагріву полістирол-вольфрамової суміші. За допомогою методів ІЧ-радіометрії контролюва-
ли ступінь нагріву суміші і однорідність теплового поля по її поверхні.
http://www-nds.iaea.org/publications/iaea-nds/iaea-nds-0195.htm
http://www-nds.iaea.org/publications/iaea-nds/iaea-nds-0195.htm
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