Document: NRC Regulatory Guide
Document ID: 3df13dae-14ee-4f25-95b4-1cedf617ae15
Document Type: regulatory_guide
Title: Regulatory Guidance on the Alternate Pressurized Thermal Shock Rule + HISTORY - HISTORY 03/2015 – DG-1299 , Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1405/ML14056A011.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.230
CFR Part: 
CFR Title: 

Content:
quirement, then licensees and applicants must comply with that standard as set forth in the regulation. If the secondary reference has been endorsed in a regulatory guide as an acceptable approach for meeting an NRC requirement, then the standard constitutes a method acceptable to the NRC staff for meeting that regulatory requirement as described in the specific regulatory guide. If the secondary reference has neither been incorporated by reference into NRC regulations nor endorsed in a regulatory guide, then the secondary reference is neither a legally-binding requirement nor a “generic” NRC-approved acceptable approach for meeting an NRC requirement. However, licensees and applicants may consider and use the information in the secondary reference, if appropriately justified, consistent with current regulatory practice, and consistent with applicable NRC requirements. C. STAFF REGULATORY GUIDANCE 1. Criteria Relating to the Date of Construction and Design Requirements 10 CFR 50.61a(b) states that the Alternate PTS Rule applies to holders of an operating license for a PWR whose construction permit was issued before February 3, 2010, and whose reactor vessel was designed and fabricated to the ASME Boiler and Pressure Code, 1998 Edition or earlier. If a licensee does not fit within this category (e.g., a licensee whose construction permit was issued after February 3, 2010), the provisions of 10 CFR 50.61a may not be used unless the licensee applies for and obtains a specific exemption under 10 CFR 50.12 from the 10 CFR 50.61a(b) prohibition.. The criteria for obtaining such an exemption are listed in 10 CFR 50.12(a): the exemption must be authorized by law, must not present an undue risk to the public health and safety, must be consistent with the common defense and security, and special circumstances must be present. When addressing these exemption criteria, the licensee should demonstrate that the risk-significant factors controlling PTS for the plant in