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:
e period from January 1, 2005, through December 31, 2015. 2/9/2015 17. Unacceptable Section III, Division 2, Code Cases The Section III, Division 2, Code Cases listed in Table 3 below are unacceptable for use by licensees in their Section III, Division 2, design and construction programs. Table 3. Unacceptable Section III, Division 2, Code Cases CODE CASE NUMBER CODE CASE TITLE REASON(S) FOR UNACCEPTABILITY DATE N-791 Shear Screw and Sleeve Splice, Section III, Division 2 There is no slip criterion for this code case. The staff believe that ASTM A1034/A1034M-2010a, “Standard Test Methods for Testing Mechanical Splices for Steel Reinforcing Bars” (Ref. 55), could be used as a good model to develop definition and test methods for slip. Concrete containments in nuclear power plants are important structures; therefore, their criteria for mechanical splices should not be less stringent than those of other seismic Category I structures, as defined in ACI 349-13. The design criterion for concrete containment structures is based on allowable strains for the steel reinforcing bars. The purpose of this strain criterion is 9/20/10 DG-1372, Page 23 CODE CASE NUMBER CODE CASE TITLE REASON(S) FOR UNACCEPTABILITY DATE partially to prevent the tearing of steel liner plates, which are attached to the inside face of the containment and serve as a leaktight pressure boundary by limiting strains in both concrete and steel reinforcing bars in containment. The mechanical splices should not be allowed to have a significant slip that would cause the strain from the steel reinforcing bars to be transferred to the steel liner plates. Therefore, the Code Case needs to develop a slip criterion for mechanical splices. ACI 349-13, Section 21.1.6.1, classifies mechanical splices as Type 1 or Type 2. The criterion for Type 1 mechanical splices is that a mechanical splice shall develop no less than 125 percent of the specified minimum yield strength of the spliced bar, as stated in Section