How do i contact a nrc expert? If you are unable to locate an expert, please contact our Office of Public Affairs. Switch Board: Toll free: 1-800-368-5642 How do i contact the nrc irap? The Act provides you with a right of access to your information. For information on NRC-IRAP or to speak with an Industrial Technology Advisor (ITA), please contact the NRC-IRAP regional office nearest to you or call our toll-free number: 1-877-994-4727 .Does nrc publish a telephone directory nuregbr 0046? Note that NRC no longer publishes a telephone directory NUREG/BR-0046. The information it contained is at this site. For security reasons, the NRC does not publish staff e-mail addresses in this online directory.