Document: NRC Regulatory Guide
Document ID: 3c238fa7-baa2-41c1-ac85-868fcda6b038
Document Type: regulatory_guide
Title: Design Limits, Loading Combinations, Materials, Construction, and Testing of Concrete Containments + HISTORY – HISTORY 07/2020 – DG-1372 , Proposed Revision 4 05/2019 – Periodic Review of Revision 3 – Revise 10/2015 – Periodic Review of Revision 3 – Reviewed with issues identified for future consideration 10/2006 – DG-1159, Proposed Revision 3 Prior to the issuance of DG-1159, RG 1.136 was entitled "Materials, Construction, and Testing of Concrete Containments (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2010/ML20105A215.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.136
CFR Part: 
CFR Title: 

Content:
taff will review a proposed specific use of high-strength reinforcement and its supporting justification in a licensing action on a case-by-case basis. Regulatory Position 9 CC-3542: Loss of Prestress Regulatory Position 9 provides guidance to supplement considerations in paragraph CC-3542 with respect to loss of prestress in tendons. This ensures that additional considerations related to prestress losses and variations in the factors that affect time-dependent characteristics of tendon forces are adequately factored in when determining prestress losses. Regulatory Position 10 CC-4240: Curing The Code provision does not provide explicit guidance for curing concrete at temperatures higher than 4.4 degrees Celsius (C) (40 degrees Fahrenheit (F)). Consequently, Regulatory Position 10 gives guidance for curing concrete by referring to standard specifications [ACI 305.1, ACI 306.1, ACI 306R, ACI 308.1 (Refs. 41, 42, 41, 42)] and industry best practices [ACI 305R, ACI 308R (Refs. 43, 44)] for hot weather and cold weather concreting. Regulatory Position 11 CC-4333: Mechanical Splices and Mechanically Headed Deformed Bar Systems and CC-4334: Arc Welded Joints Regulatory Positions 8.d and 11 recommend that mechanical splices and mechanically headed deformed bar anchorage, as well as welded splices, should be capable of developing at least the specified minimum tensile strength of the spliced or anchored reinforcing bar. This position is consistent with the strength requirements for a Type 2 splice and a headed deformed bar required by Section 18.2.7 and associated commentary of ACI 318-19, “Building Code Requirements for Structural Concrete, Commentary on Building Code Requirements for Structural Concrete (ACI 318R-19) ” (Ref. 45) for reinforcement subjected to expected stress levels in yielding regions, especially under earthquake loading. This is also consistent with the requirements for mechanical splices in Sections 12.14.3.2 and 21.1.6 of ACI 349-13, “Code