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A total ban on making it; a cable, opening 2028, built to buy it — the question Ireland closed in 1999 has reopened.
Ireland is the rare developed country that has written nuclear generation out of the law — banned outright since 1999, restated by the 2024 Planning Act. Nothing about that has changed. What has changed is the conversation around it, and the pressure now bearing on a settled position.
Six observations stand out: the ban is total and doubly locked in law; but it bans making nuclear power, not using it; a repeal bill is live for the first time in a generation; in 2028 Ireland becomes a nuclear importer as Celtic connects it to France’s grid; data-centre demand — heading toward a third of Irish electricity — is why the question came back; and there is no vendor, no regulator, no framework, so first power would be well into the 2030s at the earliest.
The consequence: Ireland has entered a period where it will consume more nuclear power while forbidding itself to make any — a position that is legally coherent, increasingly hard to defend on principle, and separated from any reactor by a decade or more.
Ireland’s nuclear position has the appearance of settledness — a clear legal ban, a long history, a wary public — and the reality of movement underneath. Data-centre demand, the delay of offshore wind, the tightness of the grid and, above all, the coming reality of nuclear imports over Celtic have combined to reopen a question the country thought it had closed. The result is a genuine, cross-party, public debate for the first time in a generation, sitting on top of a ban that remains fully in force.
Nuclear is where the series’ threads converge: the data-centre demand of IE001 and IE002 is the pressure that reopened the question; the delayed offshore wind of IE003 is the firm, low-carbon generation nuclear is floated to supplement; and the interconnection and temporary gas of IE001 are the security-of-supply answers nuclear arrives far too late to join. The debate is a lens on the whole predicament — a fifth of the grid to data centres, renewables behind, a system firmed by imported power.
The shape of this volume. § 1 sets out the headline figures. § 2 develops twelve findings, each confidence-annotated. A chapter-weight pull at p. 14 anchors the argument. § 3 decodes the ban and the law — two statutes, generation not use, the repeal bill. § 4 sets out the paradox and the imports — Celtic, Britain and the interconnected grid. § 5 decodes the drivers and the technology — data-centre demand, SMRs and public opinion. § 6 sets out recommendations, with a one-page tear-out at p. 25.
Section 18(6) of the 1999 Act bans nuclear generation; the Planning and Development Act 2024 restates it. The ban has held throughout and holds still. But it forbids making nuclear power, not importing it — and in 2028 the Celtic Interconnector links Ireland to France’s 70%-plus nuclear grid, the year a repeal bill reaches the Dáil and public support sits at 32%.
The band is the ban, unbroken; the oxblood node is 2028, when imports begin. Ireland can stop making nuclear power, not using it — and the gap between those two is this report’s subject.
HIGH — anchored to a named primary source (the Irish Statute Book, EirGrid, RTÉ, the IEA). MEDIUM — direction of travel confirmed but a material figure is unpublished, contested or a single-day snapshot. Every forward position is labelled as a projection.
Findings 01 – 12 · summary
Findings 01 – 09 follow in detail · pp. 11 – 13 · 10 – 12 carried on the § 6 matrix
Section 18(6) of the Electricity Regulation Act 1999 states that no order under it may “provide for the use of nuclear fission for the generation of electricity”; section 16(1) bars building a generating station without a CRU authorisation the Act will not grant for nuclear. The Planning and Development Act 2024 adds a second, explicit prohibition, providing that nothing in it authorises a nuclear-fission generating installation. Two statutes, one answer: no nuclear generation in Ireland. This is not a policy a minister could change by regulation; it is primary legislation, and undoing it requires the Oireachtas to pass a new Act. That is a high bar, and it is why the debate this report describes is, for now, about whether to start a legislative process — not about building anything.
The prohibition covers generation only. It does not stop Ireland consuming nuclear-origin electricity imported over interconnectors, nor does it touch research or medical uses of nuclear technology. The law draws its line precisely at the point of generation within the State — and enforcement, by definition, stops at the border. This is the distinction on which the whole paradox turns: Ireland can and does buy electricity from grids that run on nuclear power, and will buy more once Celtic opens, all entirely legally, because the ban is on making it at home, not on using it. Whether that distinction is principled or merely convenient is exactly what the reopened debate is about, and it is the question the rest of this report returns to.
The Electricity Regulation (Removal of Nuclear Fission Prohibitions) Bill 2026, a Private Member’s Bill from Fianna Fáil TD James O’Connor, has been drafted and is due for Dáil debate (RTÉ, 3 May 2026). It would repeal the 1999 ban and the related 2024 provision, authorising nuclear generation. Whatever its fate — as a backbench bill without Government adoption, its likeliest outcome is debate and referral rather than enactment this term — the ban is being formally challenged in the Oireachtas for the first time in decades. That is a genuine inflection in a settled national position, and the concrete event that moved nuclear from a fringe topic to a live parliamentary one. Its real significance is less in its likely passage than in what its debate reveals about where the parties, and the public, now stand.