Jeffrey Wade
The magnitude of worst-case nuclear accidents has been the subject of several major studies, and the potential for a nuclear accident to bankrupt any electric utility held responsible has made it difficult for nuclear power plants to obtain adequate private insurance. In the US, nuclear reactors are insured through a combination of private liability insurance and industry-wide protection. Under the Price-Anderson Act, reactor owners are required to obtain the maximum amount of insurance against nuclear-related incidents available in the insurance market, with a current limit of $500 million per reactor. If the cost of an incident exceeds this limit, the owner's coverage is supplemented by the nuclear power industry as a whole, with all reactor owners committing to paying a share of any damages that exceed the incident reactor owner's limit.
| Characteristics | Values |
|---|---|
| Name of insurance pool | American Nuclear Insurers (ANI) |
| Number of insurance companies in ANI | 60 (as of 1966) |
| Current number of member companies in ANI | 21 |
| Maximum amount of primary nuclear liability insurance | $500 million |
| Previous maximum amount of primary nuclear liability insurance | $450 million |
| Maximum amount of fund available in the event of a catastrophic nuclear accident | $12.6 billion (as of 2013) |
| Amount paid by reactor companies in the event of an accident with claims exceeding the insurance limit | $121,255,000 per reactor (as of 2013) |
| Government insurance subsidy | $2.3 million per reactor-year or $237 million annually (as estimated in 1998) |
| Government insurance subsidy | $600,000 per reactor per year (as estimated in 2008) |
| Number of US nuclear reactors | 104 (as of 2011) |
| Number of US nuclear reactors over 40 years old | 2 dozen (as of 2020) |
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What You'll Learn
The Price-Anderson Act
The Price-Anderson fund, financed by the reactor companies themselves, is then used to cover any claims that exceed the insurance limit. As of September 2013, each reactor company was required to contribute up to $121,255,000 per reactor in the event of an accident with claims exceeding the insurance limit. The fund is not paid into unless an accident occurs, and administrators are required to have contingency plans in place to raise funds through loans to ensure claimants are paid promptly.
The Act was first introduced due to the challenges of insuring against nuclear incidents. The potential magnitude of worst-case accidents could result in claims that would bankrupt any electric utility held responsible, and no insurance company could offer policies beyond its own resources. This created a barrier to entry for the nuclear power industry.
Over time, the Price-Anderson Act has been extended and amended. By 1966, it became apparent that adequate private insurance was still unattainable, so the Act was extended until 1976 with additional provisions. These provisions included preventing companies from claiming certain defences to damages, such as denying fault, and introducing a minimum time limit for claimants to file a claim after discovering harm. In 1975, the Act was further extended until 1987, with each reactor contributing between $2 million and $5 million in the event of an uninsured accident.
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Nuclear power plant safety
Nuclear power plants have always been designed with the potential hazard of nuclear criticality and the release of radioactive materials in mind. The risk of accidents in nuclear power plants is low and has been declining over the years. In the 60-year history of civil nuclear power generation, with over 18,500 cumulative reactor-years across 36 countries, there have been only three significant accidents at nuclear power plants: Three Mile Island (USA, 1979), Chernobyl, and Fukushima Daiichi.
The Chernobyl incident involved an intense fire without provision for containment, and Fukushima Daiichi severely tested the containment, allowing some release of radioactivity. These are the only major accidents to have occurred, and the few accidents that have happened have been of little consequence in terms of human fatalities.
To ensure safety, nuclear power plant operators are required to obtain the maximum amount of insurance against nuclear-related incidents available in the insurance market. This insurance is provided by a pool of U.S. insurance companies called American Nuclear Insurers (ANI), which includes 60 of the largest U.S. property and casualty insurance companies. Owners of nuclear power plants pay premiums for $375 million in private liability coverage for each nuclear reactor they own. If an incident occurs and the $375 million in coverage is insufficient, the owner's coverage is supplemented by the nuclear power industry as a whole, with each reactor owner committed to paying their share of any damages that exceed the incident reactor owner's first-tier limit of $375 million, up to $111.9 million per reactor.
In addition to insurance, the nuclear industry has devoted significant efforts to preventing accidents, particularly those involving the melting of the reactor core, which could result in a major public hazard and multiple fatalities. These efforts have been successful, and the consequences of an accident or terrorist attack at a nuclear power plant are considered minimal compared to other commonly accepted risks.
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Nuclear accident insurance limits
Nuclear power plant owners in the US are required by law to have liability insurance to cover any potential damage or injury caused by a nuclear accident. The Price-Anderson Act, first passed by Congress in 1957 and renewed several times since, provides a framework for this insurance coverage. Under this Act, nuclear power plant owners must obtain private liability insurance coverage, with a limit of $375 million per reactor. If the damages exceed this limit, the second tier of protection comes into effect, where all reactor owners contribute to cover the excess claims. As of 2011, with 104 reactors in operation, the total amount available in the industry pool was estimated at $12.6 billion.
The Price-Anderson Act has been crucial in addressing the challenges associated with insuring nuclear power plants. Initially, the potential magnitude of claims in the event of a severe accident posed significant obstacles, as it could potentially bankrupt utility companies and exceed the resources of insurance companies. The Act provides a solution by establishing a system where reactor owners share the burden of excessive claims, reducing the risk for individual companies and insurers.
Over time, the Price-Anderson Act has undergone extensions and amendments to adapt to evolving circumstances. By 1966, it became evident that obtaining adequate private insurance was still challenging, leading to an extension of the Act until 1976. Additionally, provisions were added to prevent companies from evading damage claims and to introduce a minimum time limit for claimants to seek compensation.
In 1975, the Act was further extended until 1987, with adjustments to the insurance ceiling and the elimination of federal government contributions to the insurance pool. As of 2013, each reactor company was required to contribute up to $121,255,000 per reactor in the event of an accident with claims exceeding the insurance limit. The maximum amount of the fund, known as the Price-Anderson fund, was estimated at approximately $12.61 billion.
The insurance structure for nuclear installations differs from typical industrial risks due to the potential cross-boundary consequences of a nuclear accident. As a result, national laws are supplemented by international conventions, such as the Convention on Supplementary Compensation for Nuclear Damage (CSC). The CSC establishes limits of liability, beyond which the state can accept responsibility as the insurer of last resort.
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Nuclear liability insurance providers
Nuclear liability insurance is a complex and highly regulated area. In the United States, the Price-Anderson Act governs the insurance requirements for nuclear power plant operators. The Act was created due to the potential magnitude of worst-case accidents, which could result in claims that could bankrupt any electric utility held responsible.
The insurance industry responded by forming an insurance pool called American Nuclear Insurers (ANI). ANI is made up of around 60 of the largest U.S. property and casualty insurance companies. Under the Price-Anderson Act, nuclear power plant operators are required to obtain the maximum amount of insurance available in the market, which was $450 million per reactor as of 2017. This insurance is the first tier of protection. If an incident occurs and the insurance coverage is insufficient, the second layer of protection comes from the nuclear power industry as a whole, with all reactor owners committing to pay their share of any damages that exceed the first-tier limit. This second tier is currently set at $111.9 million per reactor, and with 104 reactors in operation in 2011, the total amount available in the industry pool was $12.6 billion.
The Price-Anderson Act also covers a range of nuclear-related incidents, including theft, sabotage, transportation, and storage of nuclear fuel and waste, as well as the operation of nuclear reactors. Claims can include bodily injury, sickness, disease resulting in death, property damage, and reasonable living expenses for individuals evacuated from an affected area.
The Act has been amended over the years, with changes including the introduction of a minimum time limit for claimants to file a claim and the removal of certain defences for damages claims. The 1979 Three-Mile Island Nuclear Power Plant accident in Pennsylvania is the only major accident resulting in large-scale liability payments to the public under the Price-Anderson Act, with insurers paying approximately $71 million in liability claims and litigation costs.
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Government insurance subsidies
The US government has provided insurance and subsidies to the nuclear industry in various ways. The Price-Anderson Act, for instance, serves as a self-insurance scheme for nuclear power plants in the event of a catastrophic accident. Under this Act, power reactor licensees are required to obtain the maximum amount of insurance available in the market against nuclear-related incidents. The Act also stipulates that reactor owners are committed to paying their share of any damages that exceed the incident reactor owner's first-tier limit of $375 million, up to $111.9 million per reactor.
The Act has been extended multiple times, with amendments made to enhance the protection for claimants and remove discrepancies in different states. Notably, the federal government's contribution to the insurance pool was eliminated in 1975. However, Congress committed to taking the necessary actions in the event of a larger accident, potentially including additional charges to reactor companies beyond the prescribed limits.
The government's involvement in insuring the nuclear industry extends beyond the Price-Anderson Act. Economists Heyes and Heyes valued the government insurance subsidy at $2.3 million per reactor-year, or $237 million annually. In contrast, the Congressional Budget Office estimated a lower value of $600,000 per reactor per year. The Nuclear Waste Fund serves as another example, transferring $750 million in fee revenues annually from utilities to the government.
Additionally, the federal government has provided major support to the commercial nuclear industry in areas such as nuclear research, development, regulation, enrichment of uranium, and indemnification of power plant owners against nuclear accidents. These efforts have come at a significant cost to taxpayers, with the regulatory function alone costing $1.2 billion from FY 1960 through 1978.
At the state level, five states (Connecticut, Illinois, New Jersey, New York, and Ohio) have implemented support programs for nuclear power plants. These programs aim to compensate or assist in-state nuclear generating plants and address economic pressures from declining wholesale market prices. The programs vary in structure, with most involving zero-emission credits (ZECs) and some utilizing auctions for carbon-free electricity.
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Frequently asked questions
The Price-Anderson Act is a US government insurance scheme for nuclear power plant accidents. The Act requires power reactor licensees to obtain the maximum amount of insurance cover against nuclear-related incidents.
As of 2023, the Nuclear Regulatory Commission (NRC) has increased the maximum amount of primary nuclear liability insurance from $450 million to $500 million per reactor.
If the cost of an accident exceeds the insurance cover, the Price-Anderson Act states that Congress will review the incident and take any necessary action. The reactor companies themselves are also obliged to contribute to a fund to cover the difference.
As of 2013, the maximum amount of insurance cover available for all US reactors was approximately $12.61 billion. This figure is calculated by multiplying the maximum insurance cover per reactor by the number of reactors in operation.
