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Frequently Asked Questions
Answers
| A1 |
Why has the waste issue not been solved?
The waste issue is a political problem and not a technical one. The nuclear industry has been managing its waste for more than 50 years - ever since the first electricity was generated. High-level waste has been stored in ponds prior to vitrification. Intermediate level waste has been held where it arises, pending final disposal, while low-level waste (including that from Irish industry and hospitals) has gone to dumps. Storage in ponds and in vitrified waste stores has allowed some of the heat to dissipate and the radioactivity to decay.
The Finns have agreed a solution and it will be implemented in the near future. See video FAQs
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| A2 |
Has decommissioning ever actually happened anywhere?
A number of former nuclear sites have been fully decommission and returned for unrestricted use. The World Nuclear Association has a good paper on the current state of decommissioning world wide.
The European Commission has a decommissioning department which provides support to member states and monitors progress at the various sites being decommissioned.
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| A3 |
Are supplies of uranium limited?
The Nuclear Energy Agency of the Organisation for Economic Cooperation and Development (OECD) published (June 2006) the latest edition of its "Red Book", a regular publication which has reported on Uranium Resources, Production and Demand over the past decades. The International Atomic Energy Agency (IAEA) of the United Nations also participates in the gathering of the data contained. The document states that the amount of uranium available today is 4.7 million tonnes, which is enough to fuel the present fleet of reactors for 85 years. However, it goes on to state that, based on geological evidence, some 35 million tonnes are available for exploitation.
By 2025 the world nuclear energy capacity is expected to grow between 22% and 44% and the OECD believes the currently identified resources are adequate to meet this expansion.
In the longer term, continuing advances in nuclear technology will allow substantially better utilisation of these resources: reactors will be capable of extracting some 50 to 60 times as much energy from the uranium as present day reactors. Thus, there is sufficient uranium available to power nuclear reactors for the foreseeable future. FAQs |
| A4 |
Is nuclear power expensive?
Most recent studies show nuclear power to be the cheapest source of electricity. It is also the only source which can be expanded to meet projected future demand. FAQs |
| A5 |
Are nuclear reactors are too large for the Irish grid ?
Such a contention might be true if the only commercially obtainable reactors were of 1000 megawatts of electrical power (MWe) or more. However, this is not the case.
There are currently at least nine power reactors under construction worldwide of less than 700 MWe; for example, Argentina and Romania are building the largest of these with a nominal power output of just less that 700 MWe - a perfect fit for the island of Ireland 's grid. These are only slightly larger than the reactors considered suitable in the late 1970 by the ESB for construction at the Carnsore Point. FAQs |
| A6 |
What about Chernobyl and Three Mile Island ?
A typical western reactor, such as that at Three Mile Island , is sealed in a 4- to 8-inch-thick high-tensile steel pressure vessel. About this is an additional 4ft-thick leaded-concrete enclosure . These, together with the radioactive coolant systems, are then enclosed in a further 1- to 2 inch-thick steel containment vessel, which in turn is enclosed in a 3ft-thick shield building.
The Chernobyl reactor lacked these vital layers of containment structures. As a result, when steam pressure caused the reactor vessel to rupture, the radioactive material that rushed outwards escaped immediately into the atmosphere. Neither the Three Mile Island nor the Chernobyl accident was caused by a nuclear explosion. In both cases the problem was caused by rupture of the nuclear reactor containment vessel as a result of steam pressure.
No death or injury occurred during the Three Mile Island accident, since radioactivity was contained within the reactor. The one at Chernobyl was a radically different matter.The reactor design was gravely defective and the Soviets ignored public safety by omitting the enclosures provided in all western reactors to prevent radiation leaking into the atmosphere.The graphite moderator went on fire, burned for nine days and the radioactive smoke particles were carried by the wind over large areas of the Soviet Union and Europe. The area within 30 km of the reactor was seriously contaminated. If Chernobyl had been enclosed in the same way as Three Mile Island , this would not have happened. FAQs |
| A7 |
Is nuclear a "dirty" fuel ?
Nuclear is the cleanest per unit of electricity produced over its life cycle, taking into account everything from mining ore to decommissioning and disposal of waste. The figures of grams of carbon per kWh produced have been broadly confirmed by the OECD. They are:
Nuclear: 4
Wind: 8:
Hydro: 8
Energy crops: 17
Geothermal: 79
Solar: 133
Gas:430
Oil: 828
Coal: 955
In other words, nuclear is cleaner than wind and other renewables, 100 times cleaner than gas, and 270 times cleaner than coal.
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| A8 |
Does nuclear power expose us to high radiation doses ?
This is our average % exposure to radiation:
Radon seeping from the ground 50 %
Medical X-rays 14 %
Gamma rays from rocks 13 %
Cosmic - ie from the sun 12 %
Chemicals in our bodies 10 %
Fall-out from nuclear weapons 0.2 %
Occupational and largely indoor radon 0.2 %
Nuclear industry activities and
disposal of radioactive materials 0.1 %
Radioactive products - less than 0.1 %
In other words, nuclear medicine exposes the average Irish person to about 140 times more radiation than nuclear power and natural radiation to 750 times more.
FAQs
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| A9 |
Is terrorism is a threat?
Terrorists pose a threat the world over and security at nuclear sites is crucial. But nuclear power stations are not bombs waiting to go off. Their systems are entirely different from military weapons. Nuclear reactors are operated within robustly thick concrete containment vessels designed to withstand massive impact. In fact, in computer simulations an aircraft flown into a nuclear power station containment vessel at 500 mph evaporated, but the containment was undamaged.
FAQs
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| A10 |
The threat of proliferation ?
Ireland will not prevent the international proliferation of nuclear weapons by refusing to build a domestic nuclear power plant.
The effective operation of international anti-proliferation treaties is necessary and so far those protocols have worked pretty well, with UN agencies as active watchdogs. Nuclear materials in nuclear installations and in transit are safeguarded using methods tried and tested over 50 years. The important thing is to promote the responsible peaceful use of uranium as a means of generating electric power: to make sure that uranium - with no other peaceful use other than to generate electricity - is put to the service of man and so extends the availability of other fuels.
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| A11 |
Don't we have enough potential in renewables to do away with the need for nuclear?
In a word; No. It is important to bear in mind what we are trying to achieve; we want to reduce carbon emissions and maintain electricity prices at a level that will be competitive internationally, and only nuclear can achieve that. All other forms of renewables (including solar and hydro) do produce higher levels of CO2 than does nuclear. Nuclear is also the least expensive and safest.
It is implicit in the question that nuclear is something to be avoided. BENE does not have that view. It is our position that nuclear is not to be feared, although it must be respected.
FAQs
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| A12 |
Don't we have enough wind power potential to do away with the need for nuclear?
The main problem with wind power (leaving aside noise, visual intrusion, and interference with broadcast media) is its intermittency. That is, the combination of the unreliability of wind power (the fact that its availability is unpredictable) and its fluctuating nature. Intermittency can be accommodated on the national grid up to a certain point, but large-scale use of wind can play havoc with the management of a grid.
A separate problem is that wind turbines generally have a low capacity factor. The capacity factor is the ratio of the actual energy produced in a given period, to the hypothetical maximum possible (i.e. if running full time at rated power). The Capacity Factor will obviously vary from location to location, obviously, but is typically in the region of 25%. In other words, it is as if the turbines work flat out for only 25% of the time, and are completely idle the rest of the time.
Worse still, the timing of their effective operation is obviously uncontrollable as it depends completely on the weather. Turbines are therefore often at maximum output in the early hours of the morning, and completely still at daybreak when wind speeds are most likely to be at their lowest.
If there is no wind, then there is no wind, and it doesn't matter how many turbines are on-line as they can produce no electricity if there is no wind. Large weather systems can affect very wide regions in this way. The wind energy sector therefore needs backup. Backup can be in one of three options; pumped storage (this allows excess power to be stored and then released on demand), interconnection with extra-national grids (e.g. the UK , France ), and standby generators. Not only are these options very expensive, they all produce more CO2 than does nuclear. As noted above, it is also implicit in the question that nuclear is something to be avoided. It is our position that nuclear is not to be feared, although it must be respected.
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| A13 |
Don't we have enough wave and tidal power potential to do away with the need for nuclear?
In a word; No. Brilliant engineers have been trying to make wave power work for more than thirty years, but after all of the time, money and effort expended, there is only one wave-powered electricity generating station in the world. Why is there not more of that model? For the very obvious reason; it is too expensive and impractical.
The proponents of wave power contend that not enough resources are being put into research. However, if more money is not going into wave power it is because the technologies have shown insufficient promise. The dream is one of limitless power, available free from the ocean. The reality is that the marine environment is a soup of corrosive chemicals and marine organisms. Any equipment exposed to the sea is likely to face problems of corrosion and fouling. Even more important is the fact that the mechanical stresses exerted by the waves on the equipment are enormous, with the result that equipment is prone to mechanical failure and needs heavy maintenance effort.
As for tidal, the requirements of the technology are such that there are very few suitable locations around the world, and none in Ireland .
As noted above, it is also implicit in the question that nuclear is something to be avoided. It is our position that nuclear is not to be feared, although it must be respected.
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| A14 |
Don't we have enough potential from bio fuels to do away with the need for nuclear?
In a word; No. The amount of land required for a meaningful contribution is extraordinary. The 2020 target of 10% for bio fuels in transport would consume 375,000 hectares (900,000 acres) nearly all of our tillage land (Frank McDonald, Irish Times 17/02/2007 ). The bio fuel fad is likely only to end in the final destruction of agricultural lands and forests in the developing world. Already, there are signs that the move toward bio fuels is diverting agriculture away from food production, resulting in upward pressure on food prices around the world.
As noted above, it is also implicit in the question that nuclear is something to be avoided. It is our position that nuclear is not to be feared, although it must be respected.
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