{"data":{"id":"us/10-cfr-52.55","jurisdiction":"us","citation":"10 CFR 52.55","heading":"Duration of certification.","body":"(a) Except as provided in paragraph (b) of this section, a standard design certification issued under this subpart is valid for 40 years from the date of issuance.\n(b) A standard design certification continues to be valid beyond the date of expiration in any proceeding on an application for a combined license or an operating license that references the standard design certification and is docketed either before the date of expiration of the certification, or, if a timely application for renewal of the certification has been filed, before the Commission has determined whether to renew the certification. A design certification also continues to be valid beyond the date of expiration in any hearing held under § 52.103 before operation begins under a combined license that references the design certification.\n(c) An applicant for a construction permit or a combined license may, at its own risk, reference in its application a design for which a design certification application has been docketed but not granted.","path":["Title 10—Energy","CHAPTER I—NUCLEAR REGULATORY COMMISSION","PART 52—LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS","Subpart B—Standard Design Certifications"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-10.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:09Z","sha256":"67b4709d018dc739802991f6c081bf45022a50411e41f07bc947ced8510c9b55","source_id":"us-cfr","stale":true,"prev":"us/10-cfr-52.54","next":"us/10-cfr-52.57"},"notice":"GroundRules: Original legal text. Not legal advice."}