Document: NRC Regulatory Guide
Document ID: 0ae1e098-eccd-43e7-b12e-43b05aa1fe48
Document Type: regulatory_guide
Title: Safety-Related Concrete Structures for Nuclear Power Plants (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1617/ML16172A240.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.142
CFR Part: 
CFR Title: 

Content:
sible. The NRC Staff position is to use φ= 0.60, which provides margin to account for uncertainties and variability in the shear capacity and the consequences of brittle failure. This discussion also applies to Appendix C, Section C.9.3 and RC.9.3.4 of ACI 349-13 3.8 ACI 349-13, Section 21.9.9, discusses provisions for columns supporting discontinuous shear walls. The use of this type of structural configuration causes irregularities and adversely affects stiffness of the structure and induces additional shear and torsional forces. Therefore, the NRC staff does not endorse the structural configuration described in Section 21.9.9 because it is inappropriate for use in nuclear safety-related structures. DG-1283, Page 7 Regulatory Position 4 This position endorses ACI 349-13, Appendices A, C, and F, with certain clarification and conditions that reflect the existing NRC staff review practices. Regulatory Guide 1.199 endorses, with certain exceptions and conditions, Appendix D of ACI 349-13. 4.2.3 The technical background information for this regulatory position is identical to that for Regulatory Position 3.7. Regulatory Position 5 This position alerts the applicant to the jurisdictional boundaries between ACI 349-13 and ACI 359-15 to capture structure-to-structure interaction effects. ACI 349-13 provides the minimum requirements for design and construction of nuclear safety-related concrete structures (other than containments) and structural members for nuclear facilities, whereas ACI 359-15 covers the design and construction for concrete containments. Harmonization with International Standards The International Atomic Energy Agency (IAEA) works with member states and other partners to promote the safe, secure, and peaceful use of nuclear technologies. The IAEA develops safety standards for protecting people and the environment from harmful effects of ionizing radiation. These standards provide a system of safety fundamentals, safety requirements, and safety guides