On January 12, 2026, the United States Department of Energy (DOE) took a decision that has sent reverberations through the global nuclear safety community: it formally eliminated the ALARA (As Low as Reasonably Achievable) principle from its directives and regulations. This decision, made in the context of President Donald Trump’s executive orders aimed at accelerating nuclear energy development and reducing regulatory burdens on the nuclear industry, departs significantly from longstanding national and international practices of radiation protection. The implications extend far beyond the United States, as American regulatory standards have historically shaped global norms in the nuclear sector through international bodies like the International Atomic Energy Agency (IAEA) and the International Commission on Radiological Protection (ICRP).
For UPSC and SSC aspirants, this development is important for several reasons. It touches on the intersection of science, public policy, and governance; raises fundamental questions about how scientific consensus translates into regulatory practice; illustrates the tension between economic development goals and precautionary public health standards; and has direct relevance for India’s rapidly expanding civilian nuclear energy program.
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Five Important Key Points
- ALARA (As Low as Reasonably Achievable) is the operational philosophy of radiation protection, balancing safety with feasibility, cost, and societal need, and is part of the regulatory framework upheld by the ICRP, WHO, and IAEA.
- The Linear No-Threshold (LNT) model, which underpins ALARA, holds that any dose of ionizing radiation carries some risk of harm — especially cancer — proportional to the dose, with no safe threshold below which radiation is completely risk-free.
- Critics of the DOE’s decision argue it relies on non-peer-reviewed internal reports, is politically motivated by nuclear industry interests, and risks undermining public trust in nuclear safety governance.
- The DOE’s stated justification is that excessive regulation based on ALARA has hindered nuclear innovation and that mission objectives can be met more effectively with a reformed radiation framework.
- India, which is rapidly expanding its nuclear energy capacity and has been at the forefront of complying with internationally accepted radiation protection practices, must continue adhering to ICRP and IAEA standards regardless of the US policy shift.
Understanding ALARA and the LNT Model
To understand why the elimination of ALARA matters, it is necessary to understand the two interconnected scientific and regulatory frameworks that have governed radiation safety for decades.
The Linear No-Threshold (LNT) model is a risk estimation framework developed in the mid-20th century based on epidemiological studies of populations exposed to ionizing radiation — including survivors of the Hiroshima and Nagasaki atomic bombings, workers in uranium mines, and patients who received X-ray treatments for medical conditions. The core assertion of LNT is that the relationship between radiation dose and cancer risk is linear — meaning that doubling the dose doubles the risk — and that there is no threshold below which radiation carries zero risk. Even very low doses of radiation, according to LNT, carry a small but non-zero probability of causing cellular damage that could eventually lead to cancer.
The LNT model is used by regulatory agencies worldwide to set permissible exposure limits for radiation workers and members of the public. In India, the Atomic Energy Regulatory Board (AERB) sets occupational dose limits of 20 millisieverts per year for radiation workers, consistent with ICRP recommendations derived from the LNT model.
ALARA — As Low as Reasonably Achievable — is the operational expression of LNT in practice. It does not simply mandate that radiation exposure be minimized at any cost. The word “reasonably” is crucial: it introduces a cost-benefit calculus that balances the health benefit of further reducing exposure against the economic cost and practical feasibility of doing so. ALARA encourages nuclear facilities to adopt the best available engineering controls, administrative procedures, and training programs to reduce exposure, while acknowledging that absolute zero exposure is neither achievable nor economically rational.
Why Did the DOE Eliminate ALARA?
The DOE’s decision was framed as a response to what the department described as a decades-old regulatory framework that had become an obstacle to nuclear innovation. The Trump administration’s executive orders on energy policy explicitly identified nuclear regulation as excessively burdensome and called for a review of safety standards that had accumulated over decades without adequate cost-benefit analysis.
The DOE’s position draws on a body of scientific heterodoxy — the hormesis hypothesis — that challenges the LNT model. Hormesis argues that low doses of radiation are not merely harmless but may actually be beneficial, stimulating cellular repair mechanisms and immune responses. The analogy offered is that of exercise: moderate physical stress produces health benefits even though extreme stress causes harm. Proponents of hormesis argue that the LNT model’s assumption of linear risk at all doses is based on extrapolation from high-dose data and may significantly overstate the risks of low-dose exposure.
While the hormesis hypothesis has legitimate scientific proponents and some experimental support in cellular and animal studies, it remains highly controversial. The principal objections are that its effects vary unpredictably across different individuals, tissues, and types of radiation; that ethical constraints make it difficult to conduct the controlled human trials needed to establish the hypothesis rigorously; and that existing large-scale epidemiological studies, including the ongoing Million Person Study tracking radiation workers, have found evidence of cancer risks at low doses that is inconsistent with hormesis. A 2023 study published in Nature Medicine found elevated blood-related cancer risks even in populations exposed to very low radiation doses.
International Bodies Continue to Uphold LNT and ALARA
The international nuclear safety establishment has not followed the DOE’s lead. The ICRP — the body that sets the scientific and ethical framework for radiation protection globally — has not indicated any intention to revise dose limits or abandon the LNT framework. The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), which periodically reviews the global scientific evidence on radiation effects, and the World Health Organization (WHO) continue to rely on LNT as the basis for radiation protection guidance.
This creates an unusual and potentially destabilizing situation: the world’s largest economy and a major nuclear power has departed from the regulatory framework that it previously helped to develop and that is followed by every other nuclear nation. The implications could be significant. American nuclear facilities operating under less stringent ALARA requirements may face difficulties in export markets — for nuclear reactors, nuclear fuel, and nuclear technology — in countries that require compliance with ICRP standards as a condition of imports. Nuclear workers at US facilities may be exposed to higher doses than their counterparts in other countries, creating potential liability and workforce trust issues.
Radiation Safety Governance in India
India’s nuclear sector is governed by the Atomic Energy Regulatory Board (AERB), established under the Atomic Energy Act of 1962. The AERB sets safety standards for nuclear power plants, research reactors, medical radiation facilities, and industrial radiation users. India’s regulatory framework is broadly aligned with ICRP and IAEA recommendations, and this alignment has been consistently affirmed by Indian nuclear regulators.
India’s civilian nuclear energy program has ambitious expansion plans. India aims to increase nuclear power capacity from the current approximately 7,000 MW to 22,480 MW by 2031-32 and to 45,000 MW by 2050, as part of its long-term low-carbon energy strategy. This expansion involves the construction of Pressurized Heavy Water Reactors (PHWRs) of Indian design, Light Water Reactors being built in partnership with Russia (Kudankulam), France (Jaitapur), and the US (Gorakhpur, with Westinghouse technology), and the ambitious development of thorium-based fast breeder reactors through the third stage of India’s three-stage nuclear program.
Maintaining the highest standards of radiation safety is not merely a public health imperative for India — it is a strategic and economic necessity. Nuclear trade with partner countries, including the civil nuclear agreements India has signed with the US (123 Agreement), France, Russia, Australia, Canada, and others, requires India to demonstrate compliance with IAEA safeguards and international safety standards. Any weakening of India’s radiation safety regime, even in response to political pressure or short-term economic incentives, would jeopardize these agreements and India’s access to nuclear fuel and technology.
The Deeper Issue: Scientific Consensus, Precaution, and Public Trust
The US decision to drop ALARA raises a broader and more profound question about the relationship between scientific uncertainty, regulatory policy, and public trust in institutions. Modern regulatory science deals routinely with situations where the underlying science is uncertain — where the evidence is contested, where different methodologies produce different conclusions, and where the economic stakes create powerful incentives to favor particular interpretations of data.
The precautionary principle — which holds that in the face of scientific uncertainty about potential harm, regulatory action should err on the side of caution — is not universally accepted in regulatory philosophy. Critics argue that excessive precaution can itself cause harm, by blocking beneficial technologies, driving up costs unnecessarily, and misallocating resources to manage risks that may be vanishingly small.
However, in domains like radiation safety, the precautionary approach has a specific justification: the harms — cancer, genetic damage, radiation sickness — are severe and often irreversible; the affected populations include the most vulnerable (radiation workers, people living near nuclear facilities, future generations affected by genetic damage); and the economic interests of the nuclear industry create powerful incentives to systematically underestimate risk. In such contexts, public trust in the regulatory system depends on the perception that regulators are protecting public health rather than serving industry interests.
The DOE’s decision — made without broad scientific consensus, relying on non-peer-reviewed internal reports, and framed in explicit alignment with presidential executive orders aimed at deregulation — threatens to erode this trust precisely at the moment when the US is trying to position nuclear energy as a key part of its clean energy transition. The optics of abandoning ALARA, even if some experts believe the scientific case for revision has merit, risk deepening public mistrust and fueling opposition to nuclear projects that the country urgently needs.
Relevance for UPSC and SSC Examinations
This topic is directly relevant to UPSC Mains GS Paper III on science and technology, energy policy, and environmental governance. Questions on India’s nuclear energy program, the three-stage nuclear program, the Atomic Energy Regulatory Board, the civil nuclear 123 Agreement, and India’s nuclear safety standards are standard fare in UPSC Prelims and Mains. The broader questions about the precautionary principle, the relationship between scientific consensus and regulatory policy, and the governance of nuclear technology connect to GS Paper IV (ethics) as well. For SSC examinations, basic awareness of what ALARA is, why the US decision is controversial, and India’s position is sufficient. The topic also has obvious relevance for the Science and Technology optional paper and for candidates interested in energy policy as an essay topic.