Document: NUREG-0800
Document ID: ab4f353d-c299-479d-ab25-834f97196988
Document Type: srp
Title: CONCRETE AND STEEL INTERNAL STRUCTURES OF STEEL OR CONCRETE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070326.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.3
CFR Part: 
CFR Title: 

Content:
e relationship which may exist between the actual component and the test model shall be accounted for in the evaluation of C. c. BWR Mark III Containment Drywell 123 (i)i. For concrete portions of the drywell, the acceptance criteria of item II.3.d(a)(i) as described for the divider barrier apply. (ii)ii. For steel portions of the drywell that resist pressure and are not backed by structural concrete, the acceptance criteria of item II.3.d(a)(ii) as described for the divider barrier apply. (iii)iii. For the lower vent portion of the drywell: (a) If the main reinforcement of the drywell is carried down between 124 the vent holes and the reinforced concrete section is relied upon for structural purposes, the structural acceptance criteria is the same as for item (1)i above. (b) If the main reinforcement of the drywell is terminated above the vent holes and two steel plates lining both faces of the wall are utilized for structural purposes, the acceptance criteria for item (ii)ii above will apply. (c) 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 found 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. 125 Such a test is acceptable if found 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 DRAFT