Fellow (FNucl)

Who should apply?

Fellow-graphic wFellowship of the Nuclear Institute is the highest class of membership. Fellows are typically nuclear professionals working in senior positions who have significant autonomy and who have made a significant contribution to the industry. They will be an existing Member of the institute or meet the requirements for this grade including the requirements of the Nuclear Delta® applicable to their role and responsibility.

How do I apply?

For Direct Fellows, complete the entire Membership Application , including the section to demonstrate you satisfy the Nuclear Delta®, and return copies of degree certificates and any existing memberships and a hard copy to: Membership Team marked 'Application for Member', Nuclear Institute, Phoenix House, 18 King William Street, London EC4N 7BP and also by email to membership@nuclearinst.com 

For existing Members wishing to upgrade to Fellow, please click here , if you have any questions please contact Membership: membership@nuclearinst.com or call 0207 816 2600

Note: for those applying for Fellow, please ensure that your Proposer and Referee complete the Reference Form.

For further information on the application process, please see the Application Guidance. Current fees for application and all grades of membership can be found on the Fees & Payments page.


Professional registration is an important milestone for any engineer or scientist. It establishes their proven knowledge, understanding and competence. The Nuclear Institute is licensed by the Engineering and Science Councils. Find out more about how to apply here. 

What happens next?

Applicants are assessed by the Nuclear Institute through a process known as professional review, carried out by trained practising nuclear professionals who form the Membership Committee.

Applicants must demonstrate they have the relevant qualifications (or equivalent), work experience, Nuclear Delta® and competencies for the grade and registration level applied for when applicable. They must also demonstrate a commitment to maintain their competence, work within professional codes and participate actively within the nuclear profession.

The Professional Review Process

A route map to explain the flow of the application process will be coming soon. 

In a standard application, this is a two stage process with an application assessment followed by a professional review interview. To complete the application process will take approximately 12 weeks. 

The Nuclear Institute expects Fellows to maintain a CPD record to maintain their registration. Find out more here