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
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Section ID: RG-1.136
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characteristics (e.g., type and quantity of cladding materials) such that the potential for production of combustible gases is comparable to LWR designs licensed as of October 16, 2003, to which only the requirements in 10 CFR 50.44(c) apply: D + 310 kPa (45 psig) (4) For nonwater-cooled reactors and water-cooled reactors that have characteristics related to the production of combustible gases different from those of current LWRs (licensed as of October 16, 2003), information should be included to address whether accidents involving combustible gases are technically relevant for their design. If found to be technically relevant, the general performance-based requirement in 10 CFR 50.44(d)(2) should be satisfied (note that 10 CFR 50.44(c) requirements do not apply to such reactors). Future applicants of such reactors should submit design-specific information to the NRC indicating how the safety impacts of combustible gases generated during design-basis and significant beyond-design-basis accidents are addressed in the design to ensure adequate protection of public health and safety and common defense and security. This information should be based in part on a design-specific probabilistic risk assessment. c. CC-3422 Reinforcing Steel (and related Code requirements that allow use of Grade 75 and Grade 80 High-Strength Reinforcement) In subparagraph CC-3422.1, “Design Strength,” design yield strength of reinforcement should not exceed 60,000 psi (420 MPa). Use of Grade 75 and Grade 80 high-strength reinforcement (specified minimum yield strength greater than 60 ksi (420 MPa)) allowed by the Code, in Subarticle CC-2300 and paragraphs CC-3422, CC-3520, and CC-3530, is not generically endorsed. If an applicant or licensee chooses to use such high-strength reinforcement in its specific design application, the NRC staff will evaluate it on a case-by-case basis during the licensing action review process. The applicant should include in the application results of tests,