Document: NRC Regulatory Guide
Document ID: 91c1459d-4ae6-4802-8c6d-e805db860e10
Document Type: regulatory_guide
Title: Post-tensioned Prestressing Systems for Concrete Reactor and Containment (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1221/ML12216A010.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.103
CFR Part: 
CFR Title: 

Content:
U.S. NUCLEAR REGULATORY COMMISSION REGULATORY GUIDE OFFICE OF STANDARDS DEVELOPMENT REGULATORY GUIDE 1.103 POST-TENSIONED PRESTRESSING SYSTEMS FOR CONCRETE REACTOR VESSELS AND CONTAINMENTS Revision 1 October 1976 A. INTRODUCTION General Design Criterion 1, "Quality Standards and Records," of Appendix A, "General Design Criteria for Nuclear Power Plants," to 10 CFR Part 50, "Licensing of Production and Utilization Facilities," requires that structures, systems, and components important to safety be designed, fabricated, and erected to quality standards commensurate with the importance of the safety func- tions to be performed. This guide identifies the post- tensioned prestressing systems that have been reviewed and approved by the NRC staff for use in concrete reactor vessels and containments. It also describes qualifications acceptable to the NRC staff for new post-tensioned prestressing systems. B. DISCUSSION A post-tensioned prestressing system is composed of a prestressing tendon combined with a method of stressing and anchoring the tendon to the hardened concrete. The word "system" is commonly associated with the differ- ent proprietary post-tensioned prestressing systems on the market and is understood to include the type of tendon, anchorage device, and stressing equipment asso- ciated with a given system. It is not practical to discuss the details of all of the many post-tensioned prestressing systems available in the United States. Moreover, new post-tensioned prestressing systems are being developed, and existing ones are being modified. For these reasons, the descriptions in this guide are limited to systems listed in Table A, all of which have been used or proposed for use. Some examples of use are presented in order to identify more :specifically, the system being discussed and provide a reference to some plants for which the systems in Table A have been proposed or approved. The examples cited are not intended to indicate any restric- USNRC REGULATORY