Andriy Oreshyn
Nuclear Assurance & Independent Assessment
_{Quality • H&S • Environmental • Projects • Suppliers}

Independent Assurance in Safety-Critical EnvironmentsNearly four decades of nuclear industry experience, including more than two decades in nuclear oversight, auditing and independent assessment.
My professional focus is evaluating whether management systems, projects, suppliers and governance arrangements are not only compliant with requirements, but effective in practice.
Areas of focus:
• Nuclear assurance & independent assessment
• Quality management systems
• Occupational health & safety management systems
• Environmental management systems
• Project management & governance assessment
• Supplier & vendor oversight
• Corrective action & performance improvement

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About Me
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My professional career has been built around nuclear power, engineering, independent oversight, and the question that sits behind every effective management system: does it actually work as intended?
I began my nuclear career in 1987 after completing a Master’s degree in Nuclear Power Stations and Utilities. My early career included twelve years at Chernobyl Nuclear Power Plant, providing an engineering and operational foundation that continues to shape how I approach assurance and assessment today.
Since 2005, I have worked at Ontario Power Generation, with more than two decades of experience in nuclear oversight, independent assessment, auditing, governance, and performance improvement.
Over the years, my work has expanded beyond traditional nuclear quality assurance into the assessment of management systems and organizational performance across:
nuclear assurance and regulatory compliance
quality management systems
occupational health & safety management systems
environmental management systems
project management and project governance
supplier and vendor oversight
corrective action and performance improvement
safety culture and organizational learning
As a Lead Auditor, I have worked with requirements and frameworks including ASME III NQA-1, CSA N286, CNSC regulatory requirements, and ISO-based management systems.
My approach to independent assessment is deliberately broader than compliance verification. A program can satisfy documented requirements and still fail to produce its intended results. An audit therefore needs to examine not only whether processes exist and requirements are followed, but whether controls remain effective, risks are understood, corrective actions prevent recurrence, and management receives an accurate picture of organizational performance.
I am particularly interested in the interfaces between management systems. Quality, safety, environment, projects, suppliers, corrective action, and organizational governance are often managed separately, while significant weaknesses frequently develop in the spaces between them.
As I move toward the next stage of my professional career, my focus is increasingly on applying this experience to independent assurance, auditing, and assessment of organizations, projects, suppliers, and management systems operating in complex and highly regulated environments.
All views expressed on this site are my own and do not represent my employer or any other organization.

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Articles
—**The Rules Were Clear: An Annotated Translation of the Chernobyl RBMK-1000 Operating Procedures as They Existed on April 26, 1986
Amazon →---Vendor Qualification vs. Field Reality — Why Oversight Breaks
Why suppliers pass audits but fail on the ground — and the oversight blind spots that allow it.
Read on LinkedIn →---ISO 19443 — The Nuclear Quality Standard No One Talks About
Every SMR developer should understand ISO 19443 — but few truly do or implement it correctly.
Read on LinkedIn →---Silent Drift — How Configuration Management Undermines Nuclear Safety
Configuration drift isn’t dramatic — it’s silent. It slowly erodes nuclear safety margins until failure becomes inevitable.
Read on LinkedIn →---When Configuration Control Breaks Down — Corrective Action Lessons
Behind every major nuclear issue is the same root cause: failed configuration control. Here are the lessons oversight keeps relearning.
Read on LinkedIn →---Electricity Is Becoming the New Capital — Most Governments Aren’t Ready
Electricity is becoming the defining capital asset of the 21st century — but most governments still treat it like a commodity.
Read on LinkedIn →

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