Question 6 of 7: SMR vs. Renewable Energy for an Off-Grid Northern Community — Professional Memo

Question 6: SMR vs. Renewable Energy for an Off-Grid Northern Community — Professional Memo (10 marks)

Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.

Given. An unnamed, off-grid northern Canadian community currently reliant on some existing (implicitly diesel-based) supply; a proposal for a $\sim$100 MW small modular reactor (SMR); a citizen group advocating renewable energy instead; a request from the mayor for an expert memo to council, framed by the engineer's paramount duty to public safety, health, welfare and environmental protection.

Find. A professional memo (approx. 1000 words) that presents both options even-handedly, weighs them against the paramount duty and the community's actual needs, and recommends a defensible course of action and next steps.

Approach. Frame the memo around the engineer's ethical obligation first, then present each option's technical, safety, regulatory, community and economic dimensions in turn, explicitly checking the proposed 100 MW scale against a typical remote community's actual load, and close with a recommendation grounded in due diligence, Indigenous/community consultation, and a phased approach rather than a premature single-technology commitment.

MEMORANDUM

To: Mayor and Town Council
From: Professional Engineer, Independent Technical Advisor
Re: Evaluation of Small Modular Reactor vs. Renewable Energy Options for Community Electrical Supply

Council has asked for an expert, even-handed comparison of a proposed $\sim$100 MW small modular reactor (SMR) against a renewable-energy alternative for meeting the town's electrical needs. As the reviewing engineer, my professional obligation under the Code of Ethics is to hold paramount the safety, health and welfare of the public and the protection of the environment — ahead of proponent preference, cost convenience, or political expedience. That obligation, not a technology preference, structures everything below.

1. Scale check against actual demand. Before comparing the two options on their merits, the proposal itself needs scrutiny: a 100 MW generating unit is a very large amount of power for a small, off-grid northern community. For comparison, a typical remote northern community currently served by diesel generation draws a peak load on the order of a few megawatts, not tens or hundreds. A 100 MW SMR would be an order of magnitude (or more) larger than anything the town itself could plausibly consume, meaning either (a) the stated figure is an error or a generic reference-design capacity rather than the actual sizing study for this town, or (b) the project is implicitly intended to supply a much larger regional load (e.g. mining, industrial, or a cluster of communities) beyond "the town" as described. Council should require a proper load-forecast study, including growth projections and any industrial anchor loads, before evaluating either option further; sizing the wrong technology to the wrong demand is itself a threat to safety and welfare, since it risks either chronic under-supply or a grossly uneconomic, unnecessarily complex facility for a small population to host, staff, and eventually decommission.

2. The SMR option. A modern SMR offers genuine advantages for a remote, diesel-dependent community: near-continuous baseload output regardless of weather or season, a small physical footprint, very low operational greenhouse-gas emissions once commissioned, and — importantly for northern logistics — a long refuelling interval (years, not the weekly diesel resupply convoys the town currently depends on, which are themselves a safety and reliability risk during ice-road/barge-season interruptions). Against this must be weighed: substantial capital cost and a multi-year construction and licensing timeline through the Canadian Nuclear Safety Commission (CNSC), the need for a trained, resident or on-call licensed operating and radiation-safety staff far beyond what a small town currently employs, formal emergency-planning and security requirements proportionate to a nuclear facility, and end-of-life obligations for spent fuel management and eventual decommissioning that will outlast the reactor's own operating life by decades. None of these risks are disqualifying in principle — SMRs are actively being developed specifically for remote Canadian communities and mine sites — but they are not small considerations either, and a facility sized at 100 MW magnifies every one of them relative to the micro-SMR designs (typically 1–15 MW) actually being piloted for communities of this size.

3. The renewable-energy option. A renewable portfolio (most plausibly wind and/or run-of-river or small hydro, paired with battery storage, and very likely retaining diesel or biomass as a firm backup for low-resource periods) avoids radiological risk entirely, requires no specialized nuclear regulatory regime, can be built and commissioned in phases that track actual, demonstrated demand growth rather than committing the town to a single large fixed capacity up front, and aligns more directly with the citizen group's stated preference — itself a relevant "welfare" consideration, since a technology imposed over sustained local objection carries its own social and governance risk. The principal engineering challenge is intermittency: wind and solar output vary with weather and season, so a renewable-only system needs either substantial storage, a firm backup generation source, or both, to guarantee reliable supply through a northern winter; the levelized cost of firm (not just average) power from a small renewable-plus-storage system can be higher, per firm megawatt, than from a large centralized source, precisely because of the storage/backup needed to guarantee reliability. Land footprint per megawatt is also larger than for a compact nuclear unit, which matters where suitable, accessible sites near the community are limited.

4. Indigenous and community consultation. Regardless of which technology (or hybrid) is ultimately chosen, "welfare of the public" in a northern Canadian context necessarily includes meaningful consultation with, and consent from, the Indigenous rights-holders and the broader community whose land, water, and long-term energy future are directly affected. This is both a legal duty (the Crown's duty to consult, engaged by a project of this scale) and good engineering practice: a technically optimal facility imposed without social license is neither safe nor sustainable in practice, whatever its technical merits.

5. Recommendation. I recommend that council not commit to either option as presented, and instead: (i) commission an independent, properly scoped load-forecast and feasibility study sized to the town's actual and reasonably foreseeable demand, not the proponent's 100 MW reference figure; (ii) run that study in parallel for a right-sized SMR (likely in the low single-digit to low-tens-of-megawatts range, matching the micro-SMR class actually suited to a community this size) and a renewable-plus-storage-plus-backup portfolio, on a comparable levelized-cost-of-firm-energy and full-lifecycle (including decommissioning and waste-management) basis; (iii) begin, in parallel and without delay, formal consultation with Indigenous rights-holders and the wider community, including the citizen group that raised the renewable option, so that whichever technology is ultimately selected carries genuine social license; and (iv) treat displacing the current diesel dependency — the community's most immediate safety, cost and environmental exposure — as the priority to be solved on the fastest responsible timeline, which may favour a phased renewable-plus-storage first stage (deployable faster, at a scale matched to present demand) while the longer SMR licensing and consultation process, if pursued, runs its course. This sequencing best satisfies the paramount duty to public safety, health, welfare and environmental protection: it avoids locking the town into an oversized, single-technology commitment before the actual need and the community's own consent are established, while still making genuine progress against the real and present risk of continued diesel dependence.

I am available to brief council further, and to help scope the load-forecast and feasibility study referenced above.