Preparing for Advanced Reactors

Deborah Jackson
Deputy Director
Division of Engineering Infrastructure and Advanced Reactors

Before a company gets down to the nuts and bolts of a reactor design, it has to consider the big picture of protecting the public. The NRC lays out this mandate through a combination of regulatory requirements and guidance. “General Design Criteria,” or GDC are a key part of the regulatory requirements. We’re at the point where public input will help us develop Advanced Reactor Design Criteria (ARDC) for tomorrow’s reactors.

The current criteria cover concepts such as protecting against severe natural events and putting multiple barriers between radioactive material and the environment. Designers and operators use that basis for designing, fabricating, building, testing, and operating a reactor’s safety-related equipment. Companies are now considering designs that depart from cooling reactors with water, so the NRC is moving towards properly adapting the GDC.

We’ve been working with the Department of Energy on this since 2013. Our initiative has examined where today’s GDC could apply to advanced designs, and where new or revised criteria make sense. A DOE report from late 2014 (parts one and two) laid out Advanced Reactor Design Criteria, which could fill the GDC role for non-light-water-cooled reactors.

The DOE set out both criteria independent of any specific technology, and specific criteria for reactors cooled by liquid sodium or an inert gas. These ARDC will not be binding requirements.

The NRC picked up the ball by considering existing information on advanced designs, and we’ve asked DOE additional questions while developing draft regulatory guidance on the ARDC. This is the first step in strategically preparing for the review of non-light-water reactor applications.

The preliminary draft of the ARDC will provide stakeholder insight into the NRC staff’s current views on how the GDC could be interpreted to address non-light-water reactor design features. Ultimately, a risk-informed, performance based advanced non-light water reactor regulatory framework is envisioned.

A specific question we’re looking at involves whether NRCs generic criteria are broad enough to cover the spectrum of designs being considered. We’re also asking whether the proposed criteria appropriately address some new concepts described in DOE’s documents.

Public comments, which can also be sent to AdvancedRxDCComments.Resource@nrc.gov, will be accepted through June 8. After we address these initial public comments, a draft regulatory guide will be developed and published in the Federal Register for public comment.