RADIOACTIVE WASTE: THE PROBLEM AND ITS MANAGEMENT

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International Journal of Advanced Research in Engineering and Technology
(IJARET)
Volume 7, Issue 1, Jan-Feb 2016, pp. 89-96, Article ID: IJARET_07_01_011
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ISSN Print: 0976-6480 and ISSN Online: 0976-6499
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RADIOACTIVE WASTE: THE PROBLEM
AND ITS MANAGEMENT
BADER A. HAKAMI
Faculty of Earth Sciences, King Abdul Aziz University,
Jeddah, Saudi Arabia
ABSTRACT
Radioactive waste is an arising concern in present era because of
increasing nuclear activities and nuclear weapon activities related to defence.
It is a significant problem to handle and protect the environment for
safeguarding future generations. This study deals with the global problem of
radioactive waste problems and its management. It consists of various aspects
related to radioactive waste and also, caters to the cause of concern, effects of
radioactive waste, classification and approaches of radioactive waste,
involvement of waste magnitudes and prospective solutions, disposal of
radioactivity and its management. With increasing nuclear power and arsenal,
it is important to monitor and immobilize the waste and safe respositories
deposition.
Cite this Article: Bader A. Hakami, Radioactive Waste: The Problem and Its
Management. International Journal of Advanced Research in Engineering and
Technology, 7(1), 2016, pp. 89-96.
http://www.iaeme.com/IJARET/issues.asp?JType=IJARET&VType=7&IType=1
1. INTRODUCTION
During wars, there is extensive usage of nuclear weapons and plutonium based
weapons. There are so many nuclear complexes in various countries which includes
nuclear reactors for production of plutonium. It also reprocesses plants for extraction
of plutonium. It includes large level of contamination in reprocessing of plans and
irradiated fuel which acts as radioactive collection. The dumping of nuclear reactors
and radioactive waste in the seas indicates high damages to the environment (Ojovan,
2014). It is also indicated that various processed and unprocessed nuclear waste are
found in sea and submarines. The management of radioactive waste is very casual in
most of the nations. Therefore, it is significant to understand basics of radioactive
waste and related aspects of waste management.

Bader A. Hakami
2. RADIOACTIVE WASTE
There are two basic nuclear reactions namely nuclei fission 235 U and 239 U. The
fusion of these two elements results in release of radioactive elements and enormous
energy. The fission reaction also leads to vast energy releases in reactors of nuclear
power plant. There is no control on vast releases of energy and uncontrolled releases
are possible in hydrogen and atom bombs (Gofman, 2010). Radioactive waste is
basically huge collection of radioactive materials and mostly, generates due to nuclear
power generation and other fissions of nuclear technology such as medicine and
research. In various industrial processes including nuclear industry, there are so many
unusable products which are considered as waste but they are very hazardous. It can
be considered that any waste that includes nuclear radiations is radioactive waste.
2.1. Natural radioactivity
This is a usual producer of radioactive waste. Over the years, the earth surface and
terrestrial crust is a huge reservoir of radioactivity. The sand mounds, mineral springs
and volcanic eruptions also have certain amount of radioactive materials. All type of
substances contains radioactive elements originated from nature (Shipman, 2007).
Another source of radioactive waste is activities of industrial mining where minerals
are explored and exploited. The primordial material is extracted from earth which
contains radioactivity. It also refers to radioactive materials occurring naturally and
they are quite ubiquitous like residual waste. There are various radiations which are
exposed to general public and workers.
2.2. Artificial radioactivity
Radioactivity has been discovered many years ago but after the World war, fission
processes has also been discovered. The regular activities conducted by human beings
have added to artificial radioactivity at maximum extent (Anderson, 2012). There are
two major sources i.e. military nuclear program which includes testing of
underground nuclear weapon and civilian nuclear programs which includes
applications of radioactive materials in medical and other industries and produces
nuclear power.
2.3. Nuclear fuel cycle
There are various nuclear operations conducted by civilians which lead to
radioactivity. The uranium production from mining and its use in reactors, chemical
processing and radioactive waste accumulation is covered and referred as nuclear fuel
cycle (Ojovan, 2014). The ores are mined in uranium mines and contains fraction
separated from ore and leave the entire ore in tailings. The fresh uranium fuel is quite
radioactive (Rao, 2001). After enough utilization of fuel in reactors, the spent fuel
contains fission of debris, unutilized uranium and actinides. It is referred to as
irradiated fuel and very radioactive.
3. CAUSE FOR CONCERN
Either types of radioactive waste such as natural or artificial is potential harm for
radioactive exposure to human beings through multiple channels. Any route of
radioactive materials is directly exposed to air breathed by people and food consumers
by people. This exposure decides the effects or results of radioactive materials and it
may occur to specific organs or whole body of human beings (Hensing, 2005). High
exposure can also lead to cancer. The toxicity of radioactive materials can be

Radioactive Waste: The Problem and Its Management
quantified according to level of nuclear power hazard, availability of nuclides, activity
of nuclides and permissible intake of nuclides. It also depends on various other factors
such biological and physical life, organ sensitivity, radiation from ionizing power of
nuclides and energy of radiation emissions. There are no alternative energy sources
and nuclear power is only source available to mankind. The nuclear power plants are
also managed to various controls of radiation protection practices (Attix, 2006). The
radioactive materials are capable of damaging the environment by generation of
nuclear power plants which is the major cause of concern for environment as well as
human beings.
4. RADIATION EFFECTS
There is lot of inhabitants on the planet which are exposed to natural occurrences of
radiation in constant manner and they have hazardous effects. Minor sources of
background radiation care cosmic rays of sun and stars and other radioactive materials
from soil and rocks. The human beings are also exposed to ionizing radiation from
natural sources and other medical therapies like X-ray techniques. The radiation
therapy is also targeted to affected tissues of individuals (Wainwright, 2013). There
are major effects of large radiation doses. The ionizing radiation can also affect the
DNA i.e. genetic material and other body cells (Gofman, 2010). The fast doses of
radiation affect biological body processes. The radiation dosage can be acute or
chronic. The body can tolerate only chronic doses. The genetic and somatic radiation
effects of radioactive materials have potential for development of cataracts and
cancer. It also has heritable or genetic effects which may appear in future generations
of exposed people as a result of radiation damages to reproductive cells.
5. QUANTIFICATION OF NUCLEAR WASTE
The radioactive waste level is measured in volume or tonnage terms. Another way of
measuring the radioactivity waste is in bequerels. Both the measurable units are
utilized because individuals need not to know the volume of waste for disposal and
handling purposes and contained radioactivity. The nuclear waste derived from
natural sources includes mining and other related operations results in production of
radioactive waste of few EBq and sea is considered as repository of thousands of EBq
radioactivity (Wilmarth, 2004). It can be estimated that the military nuclear operations
results in release of thousands of nuclear debris in atmosphere. The weapon
production materials also results in thousands of EBq of residual waste. Whereas, the
nuclear submarine accidents and nuclear power satellites results in few EBq of
radioactive waste. It is also estimated that nuclear waste is increasing at rate of EBq
per year due to production of nuclear power (Cohen, 2008). The huge nuclear power
plants with capacity of 1000 MW capacity produces approximately 28 tonnes of high
level radioactive waste, 465 tonnes of low level radioactive waste and 320 tonnes of
intermediate level of radioactive waste.
6. CLASSIFICATION OF RADIOACTIVE WASTE
The radioactive waste can be classified as low level or high level of radioactive waste.
6.1. Low-level radioactive waste
The radioactive waste which is not high or intermediate level is termed as low level
radioactive waste. The volume of low level radioactive waste can be more than high
level or intermediate level but radioactivity contained in low level radioactive waste is

Bader A. Hakami
less in significant manner and have shorter half lives than isotopes in high or
intermediate level radioactive waste. There are large amounts of waste in small radio
nuclides such as shielded materials, air filters, laboratory equipments, glove boxes and
other contaminated equipments constitute low level radioactive waste (Cochran,
2009). The half lives of radioactive isotopes and radioactivity level in low level waste
are quite small. When waste is stored for period of 20 to 50 years and allows
radioactive isotopes to decay low level waste. However, low level radioactive waste is
not very hazardous.
6.2. High-level radioactive waste
The high level radioactive waste is considered as waste including liquid effluents and
spent fuel which arises from reprocessing of spent solids and fuel and get converted
into liquid waste. It also consists of material from nuclear reactor or weapons. The
waste includes plutonium, uranium and other radioactive elements at the time of
fission and made up of transuranics and fission fragments (Hashem, 2015). These
components tend to decay at different times. Most of the radioactive isotopes are high
level waste because of emitted radiation amounts and also, have long half lives. The
high level radioactive waste is quite hazardous to overall environment.
7. DISPOSAL OF RADIOACTIVE WASTE
Waste disposal is very important measure to evaluate the effects of radioactive waste
on environment. The radioactive waste is discarded with no intentions of retrieving it.
The management of waste is the entire operations in sequence starting from waste
generation to disposal. The solid waste is mostly based on three disposal methods i.e.
recycling, landfill and incineration (Attix, 2006). The radioactive waste disposal has
also adopted landfill as most sophisticated method. However, the incineration of
waste like chemical contaminants is released in air. The radioactive waste cannot be
treated in this manner because emissions will contain various radioactive materials. It
requires fine filters for radioactive materials and other gaseous effluents. The
radioactive waste can be recycled up to certain extent as radioactive elements can be
recovered for cyclical use but it still leaves some part of high level radioactive waste.
The radioactive waste management includes minimization of radioactive residues,
handling of safe packing and safe disposal (Rao, 2001). It is very important to choose
the site where radioactivity can be managed safely and technical expertise, finance is
also required to result in environmentally protective and safe conditions. It includes
security of acceptable protection level of human health, acceptable level of
environment protection, acceptable impact of waste on future generations and effects
on environment.
There are few approaches for disposal of radioactivity waste. It involves
consideration of radioactive elements in context to half-live and chooses suitable
handling method. The delay and decay approach can be adopted if radioactive
elements are short lives. Another approach can be dilute and disperse to minimize the
environmental hazards (Cohen, 2008). In case of long lived radioactivity, only
approach is concentrate and contains and carries the waste concentration. The
radioactive waste management can also be conducted by bringing the radioactivity to
surface and alter the physical and chemical properties to increase the environment
mobility.

8. OPTIONS FOR RADIOACTIVITY DISPOSALS
It is important to explore radioactivity disposal options and managing radioactive
waste in efficient manner. The disposal of high level wastes can safeguard
environment as well as human health. The most favorable solution for disposal of
radioactive waste is isolation of radioactive waste from biosphere and human beings
for certain period of time. The subsequent radio nuclides releasing from radio
nuclides will result in unexposed radiation (Attix, 2006). The main purpose of this
solution is to utilize stable geological environment which have retained the integrity
for many years and provide appropriate capacity of isolation for long periods. Relying
on geological environment is mainly based on consideration that geology is passive
disposal system and does not require continued human involvement for perspectives
of safety. The system safety is based on natural or engineered barriers (Sevior, 2006).
The suitable options for disposal of radioactive waste can be geological disposal,
ocean dumping and seabed burial. The execution of these options consists of some
problems such as lack of education and awareness, environmental misconceptions,
lack of technology proof, other legal, political, financial and social reasons.
8.1. Geologic disposal
Geologic disposal consist of geological various geological formations whether under
seabed or continental crust. They act as radioactive waste disposal especially for long
lived waste. Often, it is not chosen as a disposal option because of dirty and cheap
procedures (Wainwright, 2013). The geological sites provide natural system of
isolation which is stable over thousands of years. In general, the low level radioactive
waste is disposed near by the surface or old mines. At the same time, high level
radioactive waste is disposed in rocks (crystalline) or tuff or salty.
8.2. Ocean-dumping
There are many industrialized countries across the world which is practicing less
expensive methods for disposal if radioactive waste and dump them to oceans. The
dumping of radioactive waste has been increased in recent years. Though ocean
dumping practice is banned in some countries but this problem still exist at large level
and countries are continuously disposing nuclear waste in oceans (Wilmarth, 2004). It
continues to dump all wastes in to oceans because there are no alternative methods.
8.3. Seabed disposal
This method of radioactive disposal is quite different from sea dumping and does not
involve natural isolation of radioactive waste within the specific geographical arena.
The deep oceans are main part of tectonic plate and located around 5 kilometers down
the surface of sea and it is largely covered by very thick sedimentary clay. The
canister contains high level of radioactive waste and they will be lowered into holes
and vertically stacked. This method has some problems such as rock variability and
local permeability. It is indicated that clay has lot of radioactive elements such as
plutonium. And seepage of these radioactive elements in saline water is quite minimal
(Anderson, 2012). The migration rates of radioactive elements over thousands of
years will be of the order and radioactivity will diminish to specific levels below
natural radioactivity in sea because of natural radioactive decay.

Bader A. Hakami
8.4. Subductive waste disposal method
This disposal method is proper disposal technology for nuclear waste. It is one of the
most viable options for disposing radioactive waste and ensures that the relegated
material will not return to overall biosphere. This disposal method eliminates weapon
material and safeguards the environment (Hoare, 2008). It has a very fast process of
removing the radioactive elements and therefore, it is considered as safest,
economical, environment friendly, stable and most sensible method to eliminate
nuclear waste (Ojovan, 2014). The high or low level radioactive waste is included in
deep oceans which covers almost 70 percent of planet. Subduction process includes
slides of tectonic plates and it gets reabsorbed in the mantle. The method helps in
formation of radioactive waste respository in the subducting plate so as to carry the
waste under earth crust. Then after, it will be diluted and dispersed through mantle.
8.5. Transmutation of radioactive waste
The transmutation of radioactive waste anticipates that transmutation devices can be
utilized including the combination of charged particles and subcritical nuclear reactor
for destruction of radioactivity (Yates, 2009). The fission of fragments is transmuted
by capturing the neutrons and beta decay for production of stable nuclides. The
activities of transmutation include various competing processes such as capturing
neutron, radioactive decay, fission of neutrons etc. It produces large number of
neutrons which are used for destroying the radioactive material which were kept in
subcritical reactor.
8.6. Solar option
The solar option proposes that weapons including plutonium and other concentrated
waste may be placed in earth orbit and accelerate to drop the waste into sun. It is
theoretically possible but need lot of technical involvement and highly expensive as
compared to other disposal methods (Cohen, 2008). It also requires ensuring that no
waste will be released in case of failure of space transport system.
9. RADIOACTIVE WASTE MANAGEMENT
In many countries, consumption of electricity is measured by per capita and it is
related to living standards of country. In the same manner, the minimum measure of
radioactive waste has to be measured which is generated by specific country and
related to the radioactive waste management magnitudes. There are considerable
contribution of different countries such as 75 percent of France, 47 percent of
Sweden, 42 percent of Korea, 34 percent of Japan, 31 percent of Germany, 28 percent
of UK, 19 percent of USA, 14 percent of Russia, 12 percent of Canada and 3 percent
of India (Macalister, 2013). It is clear that India has lowest contribution to the overall
radioactive waste in the world. The management of radioactive waste is integral part
of nuclear fuel cycle. The low and intermediate level radioactive waste arises from
reactor operations and reprocessing of fuel and the liquid waste is retained as sludge
after treatment of chemicals (Hafemeister, 2007). The solid radioactive waste is
managed by incineration, compaction or bailed according to the nature of waste. The
procedures of reverse osmosis, solid evaporation and immobilization with the use of
cement matrix are also adopted depending on the type of waste. The engineered
trenches are also utilized in near surfaced as disposal facilities for disposing solid
waste and the disposal sites are under regular monitoring and surveillance. Moreover,

HEPA (High Efficiency Particulate Air) are also utilized for minimizing the air
sourced radioactivity.
10. CONCLUSION
The study has explained various important aspects of radioactive waste and their
consecutive effects on human health and environment. The disposal methods, their
utility and cost effectiveness are also explained to understand the most feasible
method for disposal of radioactive waste. It is indicated that there are various
associated problems with the management of radioactive waste in long term and one
of the major problem is humanity. The obstacles in managing radioactive waste
management cannot be ignored but at the same time, government support, good sense
of humanity, effective methods of radioactive material management can solve the
problem. The efficient resources should be utilized in wise and well manner. Over the
years, the issues of radioactive waste effects and management has been raised which
led to various guidelines, technical and non-technical discussions such as retirement
plan for nuclear facilities, decommissioning of nuclear facilities etc (Shipman, 2007).
Furthermore, the issues of long term health and safety need to be addressed for better
future of human health and environment. The options for disposing radioactive waste
has been discussed in totality for understanding the possible methods for managing
radioactive waste and safeguard the environment. It mainly includes natural system
options and provides insight to the future solutions of repository. The problem of
radioactive waste cannot get solved only by financial resources but also, technical,
political, legal and social support in considerable manner.
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