Document: NUREG-0800
Document ID: a09b1666-b289-4ea9-9e8f-3ee5fbd5bf41
Document Type: srp
Title: CONCRETE AND STEEL INTERNAL STRUCTURES OF STEEL OR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1319/ML13198A250.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.3
CFR Part: 
CFR Title: 

Content:
teria are the same as for item II.5.C.i above for concrete. ii. If the main reinforcement of the drywell is terminated above the vent holes, and two steel plates lining both faces of the wall are used for structural purposes, the acceptance criteria are reviewed on a case-by- case basis. iii. If other structural systems are used in the vent region, the acceptance criteria are also reviewed on a case-by-case basis. 3.8.3-27 Revision 4 – September 2013 6. Materials, Quality Control, and Special Construction Techniques. The specified materials of construction and quality control programs are acceptable if found to be in accordance with the public code or standard as indicated in Subsection I.6 of this SRP section. Special construction techniques, if any, are treated on a case-by-case basis. For modular construction, the materials, quality control, and special construction techniques are also reviewed on a case-by-case basis. See Section II.4.E of this SRP section for further information. 7. Testing and Inservice Surveillance Requirements. BWR containment drywells, such as those used for the Mark III containment, should be subjected to a structural proof test. Such a test is acceptable if found to be in accordance with the following: A. The drywell should be subjected to an acceptance test that increases the drywell internal pressure in three or more approximately equal pressure increments ranging from atmospheric pressure to at least the design pressure. The drywell should be depressurized in the same number of increments. Measurements should be recorded at atmospheric pressure and at each pressure level of the pressurization and depressurization cycles. At each level, the pressure should be held constant for at least 1 hour before the deflections and strains are recorded. B. So that the overall deflection pattern can be determined in prototype drywells, radial deflections should be measured at a minimum of three points along each of at least three meridians equally