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:
ectly inspected during the life of the containment. Regulatory Position 3 CC-2311: Mechanical Anchorage Devices Regulatory Position 3 addresses dimensions of obstructions for headed bars such that the obstruction is considered not to detract from the net bearing area of the head calculated using the code provision in subparagraph CC-2311(b). This regulatory position is consistent with the related requirements in Annex A1 to ASTM A970/A970M-18, “Standard Specification for Headed Steel Bars for Concrete Reinforcement” (Ref. 37). Regulatory Position 4 CC-2436.3: Acceptance Standards Experience with the use of alloy steel materials for anchor blocks and wedge blocks (such as Grade 4140 material of ASTM A29/A29M, “Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought” (Ref. 38)) indicates that a high degree of hardness of these materials is a factor in causing cracking (presumably stress-corrosion cracking) under certain environments. Also, it is necessary to control the uniformity of the hardness of these materials. A thorough surface examination and proper protection before and after installation of these materials, together with close control of the amount and uniformity of hardness in these materials, may 1 This alphanumeric citing identifies the subarticle, subsubarticle, and paragraph or subparagraph if applicable, of the “Code for Concrete Reactor Vessels and Containments” being discussed. DG-1372, Page 10 eliminate cracking. Regulatory Position 4 provides guidance in addition to the Code specifications for the acceptance standards for mechanical tests of prestressing anchorage components. Regulatory Position 5 CC-2437: Hardness of Wedge Plates, Wedges and Anchor Nuts The testing of prestressing materials is needed to qualify them against loss of ductility in cold temperatures; therefore, the guidance in Regulatory Position 5 is recommended. Regulatory Position 6 CC-2438.4: Permanent Coating Material Permanent