Fissile material is one that can sustain a chain reaction upon bombardment by neutrons.
Fertile meaning that it can transmute into a fissile radioisotope (U-233) but cannot itself keep a chain reaction going.
Thorium is by itself fertile.
In a thorium reactor, a fissile material like uranium or plutonium is blanketed by thorium.
The fissile material, also called a driver in this case, drives the chain reaction to produce energy while simultaneously transmuting the fertile material into fissile material.
1. Nuclear Fission:
2. Nuclear Fusion:
Nuclear Fission & Fusion
3. Criticality:
Atoms and elements are made of protons, neutrons, and electrons. The nucleus is made of protons and neutrons, and the electrons surround the nucleus. The sum of the number of protons and the number of neutrons is equal to the atomic mass.
Isotopes are atoms with the same number of protons but that have a different number of neutrons. Since the atomic number is equal to the number of protons and the atomic mass is the sum of protons and neutrons, we can also say that isotopes are elements with the same atomic number but different mass numbers.
For example: U-233, U-235, U-238 (U – Uranium)
Out of these three U-233 and U-235 are fissile whereas U-238 is fertile.
The first two breakdowns to produce heat and neutrons as well as 2 lighter nuclei
whereas the third-one changes into Pu-239 which is fissile substance.
Similarly, Th-232 is also a fertile element, it changes into U-233.
India embarked on the path of nuclear weapons development after its face-off with China in the 1962 war, followed by China carrying out nuclear tests in 1964 and in the subsequent years.
In 1999, India came out with an explicit nuclear doctrine that committed, among other things, to No first use(NFU) — that is it would never carry out a nuclear first-strike. This doctrine emphasized “minimal deterrence, no first use and non-use against non-nuclear-weapon states”, in the words of former National Security Adviser Shivshankar Menon. The NFU promise that went together with credible minimum deterrence (CMD).
India’s nuclear power plants, mostly set up during the sanction years, provide only 3% of the energy mix. After the historic Indo-US nuclear deal 2008, the first two plants at Kundankulam – established with Russian assistance.
Nuclear fuel of the future: Thorium
According to the Atomic Minerals Directorate for Exploration and Research (AMD), a constituent Unit of the Department of Atomic Energy (DAE), India has 11.93 million tonnes of Monazite (ore) which contains about 1.07 million tonnes of thorium. The country’s thorium reserves make up 25 per cent of the global reserves. It can easily be used as a fuel to cut down on the import of Uranium from different countries.
Thorium Cycle – Working
Thorium-232 is a fertile material. The thorium cycle can be understood in following figure:
Uranium
Reasons it has not been developed
Spent Fuel Reprocessing Process
UE is an artificial process in which the percentage of U-235 is enhanced and for this purpose, centrifuges are used. Naturally occurring U is comprised of two isotopes i.e. U-235 and U-238. Natural Uranium consists of 99.3 % of U-238 which is not fissile material i.e. not suitable as fuel and 0.7 % of U-235, which is very fissile and used as fuel.
So, it is required to convert it in maximum percentage for use. In enrichment process the % of the fissile isotopes are increased by using centrifuges. In enrichment isotopic separation is done by using lessors and diffusion.
Enriched U falls into two categories-
Nuclear Cooperation Agreement
One of the plans of action devised by India to address climate change is to produce 25% of its total electricity from nuclear by 2050, for 2032 the target is 27000 MWE, for 2020 the goal is 20,000 MWE and current production is 6780 MWE which is 2 to 3 % of total electricity.
Domestically India can produce only 1/5 of total nuclear fuel, therefore, the Nuclear cooperation agreement was a sign with Argentina, Australia, Canada, France, Japan, Kazakhstan, Mongolia, Namibia, South Korea, Russia, UK, USA, Uzbekistan. Under this agreement India was promised –
Reprocessing is the extraction of useful elements from the spent fuel rods, but later the USA, Russia, and France asked India to get the membership of NSG then only access to ENR will be allowed.
India’s obligation –
As India is not a member of NPT, therefore, it was asked to classified it’s nuclear facilities in civilian and military categories and those which are in civilian were to brought under the inspection of IAEA through safeguard agreement, In 2006 India was having 21 reactors out of them 14 were brought in the civilian list and 8 in the military list. India is the only country other than the 5 nuclear weapon states which are allowed to maintain military reactors. It implies India’s recognition as a country with nuclear weapons.
Additional Protocol – It was adopted by IAEA in the 1990s to increase its presence in the nuclear programme of non-nuclear weapon states. In 1993 IAEA adopted a programme i.e. 93+2 to address the weaknesses of safeguard mechanism, this led the genesis of the additional protocol. The difference between safeguard agreement and additional protocol is that under former only declared sites can be brought under the inspection whereas under additional protocol both declared as well as undeclared sites can be inspected.
India refused to sign the protocol which has been signed by non-nuclear weapon state rather it negotiated a new one and gave 3 commitments-
Voluntary restriction on Nuclear Testing – also described as safe guard moratorium on nuclear testing. In order to define liability in case of nuclear accident a law will be passed.
India under the Prime Ministership of Dr Manmohan Singh signed the Indo-US nuclear deal.
The indo-US nuclear deal is popularly described as 1 2 3 agreement because it was signed as per section 1 2 3 of the US atomic energy act 1954. The section says if a country has signed an NPT and US president is satisfied then US can share nuclear technology for peaceful use, in case of India the problem was it has not adopted NPT therefore in 2006 US amended section 1 2 3 through Hyde act which removed the requirement of NPT, the deal was concluded in 2007 and ratified by the Indian parliament in 2008.
The highlights of agreement are –
The text of agreement says India will set up a centralized reprocessing facility where the spent fuel of all the 14 reactors will be brought and it should be safeguard with IAEA.
US was looking to establish a connection between termination of deal and nuclear testing, which was outrightly rejected by India. The agreement says that if India conducts the nuclear test then US will try to understand the circumstances that will be followed by negotiation b/w two countries which should conclude within a year. Any of two, terminate the deal by giving one-year notice in advance. The deal is reviewed annually by the US president.
Implication of the deal –
India is only non-NPT country with whom Japan has signed the nuclear cooperation agreement. The agreement was finalised in Nov-2016. This deal was important for two reasons-
Following the Fukushima accident in 2011, the talks got suspended. Later when they were resumed India changed the proposal from purchasing the steel to purchase of reactors. The nuclear agreement with Japan has two set of documents –
1. Notes on views and understanding, it carries two commitments by India
2. The second set of documents is the main agreement. According to Japan, both the document was binding whereas the Indian position is that only main agreement is binding. Japan is trying to establish a connection b/w the conduction of the nuclear test and the termination of the nuclear deal. India can not accept this interpretation because then the others will also start demanding similar provisions and one more possible is negative fallout is the dilution of predictability among the nuclear agreement which might hurt the prospect of NSG membership.
Given the geopolitical scenario where the US is withdrawing and China is expanding it is highly unlikely that Japan will do anything to undermine India’s position. Realistically India will conduct the nuclear test if China carries out some serious provocation, given the fact that China is as big a security threat to Japan as it is to India, Japan will have a sympathetic view.
According to the agreement Indian companies and their Japanese counterpart will form the joint venture to built nuclear reactors. This arrangement will facilitate the transfer of technology. India will reprocess the spent fuel for Japan, this is how the japan has been made a stack holder in the process of having the NSG membership.
This programme was formulated in the 1950s by Dr. Homi Bhabha to secure the country’s long-term energy independence, via the use of uranium and thorium reserves found in the monazite sands of coastal regions of South India especially the state of Kerala. The ultimate focus is on the Thorium Fuel Cycle.
In 1954 Asia’s first research reactor APSARA was installed. It was followed by CIRUS from Canada under the “Atoms for peace program” later India developed Dhruva which is still the largest supplier of Plutonium for weapons, besides them, BARC has developed ZERLINA and PURNIMA I-II-III out of them only DHRUVA is operating.
Indira Gandhi center for Atomic research has developed following research reactor
India’s Three Stage Nuclear Power Programme are as follows:
Stag-1 (PHWR)
First Stage: Following Reactors
BWR
PHWR
PWR
India is having PWR from Russia and France
VVER: Voda Voda Energy Reactor from Russia
Stag-2 (FBR)
Second stage: Only one type of reactor
Fast Breeder Reactor
Stag-3 (AHWR)
AHWR: Advanced Heavy Water Reactor: BARC is developing
After the success of Cyrus, and indigenous reactor with the name Dhruva was developed so as to have an indigenous source of Pu for the weapons. The first nuclear test was in May-1974 with the name operation Smiling Buddha which was described as a peaceful nuclear explosion by PM Gandhi, their explosion was carried out all of them were fission devices and sub-kiloton devices. The yield of the nuclear test is expressed in kiloton with respect to TNT(Trinitrotoluene).
In response to the nuclear test by India a cartel came into existence in the form of Nuclear Supplier Group. Initially, it was also called London club, its purpose is to control the transfer of nuclear technology and to do so it takes decisions to consensus if a country is looking to receive nuclear technology but not a membership then it has to fulfill two conditions –
For the membership there are 5 conditions –
When India started the negotiation for nuclear cooperation agreement, one of the questions was – why would NSG will permit the USA, Russia, France to share nuclear technology with India. In Sep-2008 the external affairs minister Mr. Pranav Mukherji address NSG and gave to commitments-
Very next day US brought a resolution that in case of India none of two conditions will apply and it can receive Nuclear technology from the member. This is described as special clean waiver till date NSG has granted such exemption only to one country. Following the disagreement over nuclear liability act USA pushed NSG chairman to write a letter to IAEA regarding the fulfilment of condition. Following this development US, Russia, and France especially USA started insisting that India should get membership of NSG.
The liability issue was resolved in 2015 and for the first time claim for membership was made in June-2016 When the NSG meeting was held in Seoul. During voting, China and 9 other countries voted against us. Their argument was India is not a member of NPT which is a mandatory clause.
On the other hand, is instead of a criteria-based approach the approach should be based on performance where non-proliferation credentials should be considered. Following that China proposed that all the non-NPT countries like Israel, North Korea, Pakistan should also be made members along with India and for that it will devise a two-step formula, spent more than 2 years there is no hint for that formula. They are just looking to delay if not deny the entry.
India is working on a multipronged strategy –
The membership will have the following positives –
In 1998 five nuclear tests were conducted under operation Shakti. Out of them 4 were fission devices and one was a thermonuclear device, a few days later Pakistan conducted its first nuclear test to give a message to the global community that the purpose is not to attack rather it is to defend that is why National Security Advisory Board headed by Mr. K. Subramanyam asked to drafted the nuclear doctrine. It was made public in 1999 and adopted on 4 Jan-2003.
1. No first Use
When the nuclear doctrine was discussed and debated there were three school of thought –
Finally, pragmatic school of thought prevails and No first use was adopted. It says India will not be first to use a nuclear weapon but if attacked it will carry out massive retaliation to cause unacceptable damage.
This is known as second-strike capability. To have second-strike nuclear tried is required i.e. all the 3 wings (Army, Navy, Airforce) must have the mechanism to deliver nuclear weapons. Especially the navy must have a submarine that can use nuclear missiles. The tried was completed when INS-Arihant was inducted, it uses the missile Sagarika which can carry nuclear Warhead but to have credible tried just should be at least 4-5 submarine i.e. being negotiated by India with other countries like Russia and France.
In 2003 when the doctrine was adopted there was a slight modification b/c of the following clause which says irrespective of the fact whether a country is a nuclear weapon state or non-nuclear weapon state, if it uses biological or chemical weapons against us then the retaliation will be in the form of nuclear weapons.
This might sound like a dilution of no first use but it is a deterrent that India has to project as it does not have the stocks nor the production facility of biological or chemical weapons rather it is a signatory of the biological and toxic logical convention as well as Chemical weapon convention. United Nations has officially recognized that we neither produce nor we have the stocks of such weapons. In 2010 National security advisor said no first use is pledge only towards non-nuclear weapon state, at times there is debate that India should move from no first use to first use policy which is supported by the following structural factors –
No first Use has also many positives associated with it-
Credible Minimum Deterrence
As per this policy India will always maintain certain minimum no. of a nuclear weapon to cause unacceptable damage to work out what is unacceptable to our country it is important to understand their society, polity, economy, and defense setup.
About:
Establishment:
Headquarter: Vienna, Austria.
Objective:
146 videos|358 docs|249 tests
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1. What is the difference between fissile and fertile materials in the context of nuclear energy? |
2. What is the significance of uranium enrichment in India's nuclear energy program? |
3. What controversies and relations are associated with India's nuclear diplomacy? |
4. What was the Indo-Japan Nuclear Deal and its implications? |
5. What are the highlights of India's nuclear doctrine? |
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