What is a PPE?

Currently there are more than 18 new nuclear reactors proposed in Ontario and Alberta, plus one new nuclear project planned in New Brunswick. The proponents are applying for environmental review, without identifying the type of reactor they are planning. How is this possible? The answer is the “PPE.”

What is the “Plant Parameter Envelope” Procedure?

Nuclear reactor proponents in Canada are using a “Plant Parameter Envelope” (PPE) approach instead of identifying one reactor design in Impact Assessment and CNSC reviews.

The PPE is a Pretty Poor Excuse for environmental review of a new nuclear reactor.

The PPE originates from a US lobby group, the Nuclear Energy Institute. The NEI published a document with a toolkit to develop a PPE. The PPE is intended to reduce the time needed for a nuclear proponent to obtain an Early Siting Permit for a proposed new reactor from the US NRC (equivalent to a CNSC site preparation licence). Both the NRC and the CNSC have accepted the PPE as a tool designed by the industry to streamline the approvals process.

The PPE is essentially a large spreadsheet. Various parameters (quantifiable characteristics) are listed in the many rows, with one column for each of several candidate reactor designs. Reactor vendors provide the numbers in the spreadsheet. The regulator can examine the range of values for each parameter to ensure they are within certain bounds, regardless of the reactor type. If the regulator accepts these bounds, indicating that all relevant regulatory guidelines could be met by any one of the candidate designs, an Early Siting Permit may be granted and site preparation can commence.

Therefore, in the absence of a specific design, the proponent can use the PPE approach as a surrogate in safety and environmental reviews.

This is worrisome in particular because the vendors supply all the information in the PPE. This includes the “normal and accident source term” – that represents the maximum amount of radioactivity available to be released to the environment under both normal and accidental circumstances. In Canada the source term for a severe nuclear accident in a CANDU reactor was pegged at 100 terabecquerels of cesium-137, which is in fact a small fraction of what might realistically be released in the event of a major nuclear accident involving severe fuel damage (core melting).

The danger is not only that the numbers may be skewed but also that the entire exercise of conducting an environmental evaluation and granting a site preparation licence is reduced to a numerical box-checking exercise in lieu of a detailed examination of one specific reactor design. The PPE approach is off-putting for intervenors who cannot evaluate and critique a specific reactor design.

This information was prepared by the Canadian Coalition for Nuclear Responsibility (CCNR). See one of the CCNR interventions on PPE concerns related to the “Darlington New Nuclear Project” (the BWRX-300):
Mischief in the Making

Could a new nuclear reactor double or triple electricity rates in New Brunswick?

The NB Power Review Panel report recommended considering building a new large nuclear reactor at the Point Lepreau site in New Brunswick. Based on recent experience in other jurisdictions, a new large reactor of the types likely to be considered for Lepreau could cost between $15 and $26 billion. That would be a far higher capital expenditure than the original Point Lepreau reactor, which itself came in at more than $5 billion in 2026 dollars. Read the story by Mark Winfield from York University and Susan O’Donnell, CRED-NB core member. Published by the NB Media Co-op, HERE.

Will the NB Power Review finally shake up NB Power?

The report released on March 30 from the NB Power Review panel was meant to chart a path to a better future for the public utility.  Does it do that?

NB Power desperately needs a very big shake up. The NB Power Review report rattled the utility but not nearly hard enough, writes CRED-NB core member Susan O’Donnell in a commentary published in the NB Media Co-op. Read it HERE.

Stand with Save Lorneville

CRED-NB support’s Save Lorneville’s call for a moratorium on new large data-centre grid allocations and full transparency on the proposed Beacon Data Centers project in Lorneville.

We’re asking supporters to act by April 17. Email a letter to Premier Holt and officials. It takes only 2 minutes using the letter template available HERE.

Copy and paste the text into your own text editor, and then follow the yellow-highlighted instructions. Thank you for standing with Save Lorneville!

Why this matters: Beacon Data Centers is seeking ~200 MW from the NB Power grid, roughly the electricity used by ~150,000 homes. New Brunswickers are being warned about power constraints and rising rates, yet government and agencies have been advancing this massive new demand behind closed doors.

Please share widely with your contacts. To learn more visit the Save Lorneville Facebook page HERE.

Canadian energy exports should not include electricity generated by nuclear energy

The Parliamentary Standing Committee on Natural Resources is currently studying Canadian Energy Exports. CRED-NB submitted a brief to the MPs on the committee. CRED’s position: Canadian energy exports should not include electricity generated by nuclear energy because of the heavy costs borne by Canadians. Read our submitted brief HERE.

Does SMR stand for Spending Money Recklessly?

A small modular nuclear reactor (SMR) across the country is designed to generate 300 megawatts (MW) of electricity or less, compared to Canada’s existing CANDU power reactors which generate 500 MW or more. Proponents claim that SMRs will decarbonize the electricity grid in New Brunswick and other provinces. So, how is Canada’s SMR strategy going, in New Brunswick and across the country?

CRED-NB core member Susan O’Donnell and colleague M.V. Ramana and the CEDAR project at St. Thomas University published a new report assessing SMR development. The report, the launch webinar video, and a commentary by the authors published in The Energy Mix is HERE.

Concerns about the management of Canadian Nuclear Laboratories by U.S. companies

A House of Commons committee is currently studying the management of Canada’s nuclear laboratories at Chalk River. The nuclear research site is run by Canadian Nuclear Laboratories (CNL).

Under a new contract signed at the end of 2025, CNL is managed by a consortium of U.S. companies with ties to the weapons industry. CRED-NB outlined our concerns in a brief filed today with the Parliamentary committee. Read it HERE.

Why is NB Power hiding the risks of transporting radioactive waste?

NB Power and nuclear industry partners want to build a radioactive waste pit in Northwestern Ontario. But they are hiding the risks of transporting the waste more than 2,900 km from Point Lepreau through communities in New Brunswick, Quebec and Ontario.

Current plans envision more than 2,100 transport packages of New Brunswick’s used nuclear fuel travelling approximately 2,900 kilometres, through public roads in the province and across Canada, over a period of 10 to 15 years.

Nuclear Waste Management Organization (NWMO, including NB Power) – filed their official project plan but did NOT include the 2,900 km drive from Point Lepreau. Why? To stop the public from raising concerns about it.

Learn more and take action HERE.

NB groups raise concern about nuclear waste proposal

CRED-NB and three other groups in the province, along with 70 other groups across Canada signed a letter sent Dec. 16 to Prime Minister Carney and two federal cabinet ministers asking them to oversee the nuclear industry’s proposal for radioactive waste burial in Northwestern Ontario.

NB Power is a member of the industry’s Nuclear Waste Management Organization (NWMO) proposing the project, opposed by the Chiefs in Assembly of Treaty 3, Nishnawbi Aski Nation, Anishnabek Nation and the Chiefs of Ontario.

The letter raises particular concern with the NWMO plan to exclude the transport of radioactive waste (including across roads in New Brunswick) from the Impact Assessment of the project. Read the letter HERE.