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:
ts subject to the following regulatory guidance positions. Unless otherwise stated, the regulatory guidance positions indicated are in addition to the Code provisions. 1. CC-2232.4 Basis for Selection of Self-Consolidating Concrete (SCC) The staff does not endorse general use of SCC for containment construction. The use of alternative mixture provisions (reproportioning or SCC) provided in the text of the Code provision should be limited to only localized areas of specific difficulty where conditions (e.g., reinforcement congestion) make consolidation of concrete unusually difficult. If SCC is considered for such limited application, the SCC mix should be subject to tests using standard test methods in ASTM C1611/C1611M for slump flow, ASTM C1610/C1610M (column test) and ASTM C1712/C1712M (rapid penetration test) for static segregation, ASTM C1621/1621M for passability, and ASTM C1758/C1758M as standard practice for sample fabrication. The use of SCC should follow applicable guidance for known best practices and processes in ACI 237R-07, “Self-Consolidating Concrete” (reapproved 2019). 2. CC-2243 Grout for Grouted Tendon Systems In addition to CC-2243 provisions, RG 1.107 should be used for guidance on qualifying grout for grouted tendon systems. In case of conflict between CC-2243 provisions and RG 1.107 provisions, the more stringent provision governs. The licensing application to the NRC should identify and explain such conflicts. 3. CC-2311 Mechanical Anchorage Devices For the net bearing area to be calculated by taking the gross cross-sectional areas of the head minus the nominal cross-sectional area of the bar, an obstruction should not detract from the net bearing area of the head. For this purpose, the dimensional requirements in Figure A1.3 of ASTM A970/A970M-18 should be met for an obstruction to be considered not to detract from the net bearing area of the head. Accordingly, obstructions should be considered to not detract from the net bearing area of