Document: NUREG-0800
Document ID: 808cea66-69b8-4f91-9fb2-62b3b99bc87a
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340579.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3
CFR Part: 
CFR Title: 

Content:
If other structural systems are used in the vent region, the acceptance criteria are reviewed on a case-by-case basis. 6. Materials, Quality Control, and Special Construction Techniques The specified materials of construction and quality control programs are acceptable if 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. 7. Testing and In-Service Surveillance Requirements Each BWR Mark II containment drywell should be subjected to a structural proof test. Such a test is acceptable if 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 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 one 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 least three points along each of at least three meridians equally spaced around the drywell, including locations with varying stiffness character- istics. Radial deflections should be measured at the lower vent region, at about mid-height and at near the top of the cylindrical 3.8.3-27 Rev. 1 - July 1981 wall. The measurement points may be relocated depending on the distribution of stresses and deformations anticipated in each particular design. c. In prototype drywells only, strain measurements sufficient to permit an evaluation of strain distribution should be recorded at least at two opposing meridians at the following locations on the wall: (1) at the bottom of the