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:
described in the specific RG. If the secondary reference has DG-1283, Page 8 neither been incorporated by reference into NRC regulations nor endorsed in a RG, then the secondary reference is neither a legally-binding requirement nor a “generic” NRC approved acceptable approach for meeting an NRC requirement. However, licensees and applicants may consider and use the information in the secondary reference, if appropriately justified, consistent with current regulatory practice, and consistent with applicable NRC requirements. DG-1283, Page 9 C. STAFF REGULATORY GUIDANCE This revision of RG 1.142 (Revision 3) endorses, with certain exceptions, ACI 349-13 and a portion of ACI 359-15 related to mechanical splices. They provide an adequate basis for complying with the NRC’s regulations with regard to the analysis, design, construction, testing, and evaluation of safety-related concrete structures (other than reactor vessels and containment structures), subject to the positions listed below. 1. Regulatory Position 1 ACI 349-13 provides acceptable standards for the design of pressure-resisting portions of concrete structures within the reactor containment. The structures include special structures, such as the pressure-resisting portion of the drywell of Mark III containments (e.g., General Electric BWRs), the divider barrier of ice-condenser containments, or the dividing slab (drywell floor) between the drywell and the wetwell (suppression chamber) of Mark II containments (e.g., General Electric BWRs). GDC 16, “Containment Design”, requires these structures to maintain a certain degree of leak tightness during a LOCA. If ACI 349-13 is used to design these types of special structures that function as pressure-resisting and leakage barriers add the following provisions to ACI 349-13 or provide equivalent provisions: a. provision for crack control under design load combinations that include LOCA loads; b. provisions to deal with the transition from the concrete