Document: NUREG-0800
Document ID: 0c95c042-addf-4bad-84f5-1d1692769268
Document Type: srp
Title: CONCRETE AND STEEL INTERNAL STRUCTURES OF STEEL OR CONCRETE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550052.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.3
CFR Part: 
CFR Title: 

Content:
its), the disposition of the deviations, and the need for corrective measures 3.8.3-28 Revision 2 - March 2007 v. A discussion of the calculated safety margin provided by the structure as deduced from the test results For Category I structures inside containment, structures monitoring and maintenance requirements are acceptable if found to be in accordance with 10 CFR 50.65 and RG 1.160. It is important that Category I structures inside containment accommodate inservice inspection of critical areas. The staff considers that monitoring and maintaining the condition of the containment internal structures is essential for plant safety. Any special design provisions (e.g., providing sufficient physical access, providing alternative means for identifying conditions in inaccessible areas that can lead to degradation, remote visual monitoring of high radiation areas) to accommodate inservice inspection of containment internal structures are reviewed on a case-by-case basis. Technical Rationale The technical rationale for application of these requirements and/or acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs 1. Compliance with 10 CFR 50.55a requires that SSCs be designed, fabricated, erected, constructed, tested, and inspected to quality standards commensurate with the importance of the safety function to be performed. SRP Section 3.8.3 cites RG 1.57, 1.69, 1.136, 1.142, 1.143, 1.160, and 1.199 for guidance regarding construction, quality control, tests, and inspections that are acceptable. ACI 349, with additional guidance provided RG 1.142 and 1.199; ASME Code, Section III, Division 1, Subsection NE, and ASME Code, Section III, Division 2, Subsection CC, with additional guidance provided by RG 1.57 and 1.136, respectively; and ANSI/AISC N690-1994 including Supplement 2 (2004) contain criteria for concrete and steel structures. Meeting these requirements and criteria provide assurance that the SSCs