Operating Plants
Interested in finding out more?   Contact Us

Working through the Pressurized Water Reactors Owners Group (PWROG), Westinghouse supports the “Delivering the Nuclear Promise” initiative by providing to the nuclear industry the latest, most complete categorization database tool for risk-informed operations.

Westinghouse 50.69 Program

Consistent with the tenets of the Delivering the Nuclear Promise initiative, Westinghouse has developed a streamlined approach to promote cost-effective, standardized implementation of the 10CFR50.69 (50.69) regulation throughout the industry. This regulation allows licensees to better focus plant resources on maintaining those Structures, Systems and Components (SSCs) with high safety significance by relocating safety-related SSCs with low safety significance from the scope of special treatment processes to less onerous alternate treatment processes.

Through the Westinghouse 10 CFR 50.69 Program, Westinghouse provides services to aid the licensee in the strategic planning, regulatory reviews, and subsequent implementation activities that allow the licensee to realize the potential benefits available through the 10 CFR 50.69 regulation.

Westinghouse supports utilities in the areas of:

• PRA Technical Acceptability: A deep pool of qualified resources to evaluate the PRA (and/or Margins) models for acceptability to support 50.69 categorization, and then develop and execute gap closure plans, including any level of PRA (or Margins Analysis) update or upgrade deemed necessary
• Facts & Observations (F&Os) Closure Reviews: Working with the PWROG, the utility can benefit from the highly cost-effective and well established funding process for peer reviews
• License Amendment Request (LAR) Development: Westinghouse can support the utility develop of the 50.69 LAR, and help to align the work performed for 50.69 with submittals for other applications (e.g., Risk Informed Completion Times) to drive further benefits for the utility

One key aspect of the Westinghouse 50.69 Program is the introduction of the categorization database interface tool for risk informed operations (TRIO). To help all nuclear operators benefit through the use of 10CFR50.69, Westinghouse developed the most complete categorization database tool for risk-informed operations available in the industry. Initially developed during pilot plant applications in 2008, the database tool guides users through the categorization process, performs input checks along the way and creates standardized reports that can be used by an Integrated Decision-making Panel to validate the conclusions of the categorization process.

The database tool has been updated to reflect the latest categorization data requirements and guidance. Westinghouse has made the tool available to the industry through the Pressurized Water Reactor Owners Group (PWROG). Further, the PWROG initiated a pilot project with the intent to generically categorize several systems, and this database tool will be used by Westinghouse in support of this projects.

Additional features as the industry gains more experience with the categorization process can be added through the PWROG in order to maintain a standardized database tool that provides a consistent, cost-beneficial industry approach.

Recognizing that many of the benefits of 50.69 are achieved with less onerous alternate treatments to demonstrate the SSCs can perform their intended functions, through the Westinghouse 50.69 Program, Westinghouse can develop actions the licensee can implement to remove the Low Safety Significant (LSS) SSCs from the scope of the existing special treatment programs and implement alternative treatments for those SSCs.

• The 10 CFR 50.69 rule provides licensees wide latitude in establishing appropriate treatment of categorized components without NRC prior approval. To take maximum advantage of these opportunities, licensees will need to identify and justify cost-effective alternative treatments that provide reasonable confidence that categorized components will continue to perform their design functions.
• Additionally, Westinghouse can support utilities with procurement and engineering of commercial grade components when utilities reach this point in the process.

The Westinghouse 50.69 Program supports the Delivering the Nuclear Promise initiative:

• Westinghouse works collaboratively through the PWROG and with NEI and EPRI on this initiative. Working first through the PWROG to provide generic categorization minimizes individual plant costs.
• Westinghouse helps achieve customer success through streamlined extension of generic categorization performed through the PWROG to plant-specific implementation.
• Westinghouse reduces customer burden by providing the full scope of engineering support, including licensing, PRA reviews and model upgrades to help meet the technical acceptability standards, systems and component design reviews, and ultimately the selection of appropriate alternate treatments, all which reduce customer burden, project risk and uncertainty.
• The Westinghouse 50.69 Program will continue to provide streamlined, cost-effective and standardized approaches to help the industry maximize their benefits realized through the implementation of the 10CFR50.69 regulation.

To learn more about how Westinghouse is collaborating with our industry partners and supporting the 50.69 programs through the PWROG, contact James Boatwright, Automation and Engineering, Market Applications, at +1 214-542-6921.


Click the video link below to see the Demonstration of the Tool for Risk-Informed Operations.