Document: NUREG-0800
Document ID: f03d2c71-27a1-41fd-9362-1e62c6142e13
Document Type: srp
Title: Containment Systems and Severe Accidents (Tier 1)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070653.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.3.11
CFR Part: 
CFR Title: 

Content:
2 should contain a complete list of safety-related MOVs which have an active function. These tests are required to be performed under pre-operational differential pressure, fluid flow, and temperature conditions to assure that the valves open and/or close within time limits as specified. The DCD Tier 2 in Section 3.9.6 further defines that these tests will be conducted under maximum achievable pre-operational conditions and describes the analyses that will be performed to show how the test results demonstrate that the valve will function under design conditions. 9. PNEUMATICALLY OPERATED VALVES ITAAC In cases where the fail-safe position of pneumatic valves is relied on to accomplish the direct safety function of the system, this ITAAC will verify the fail-safe operation. 10. CHECK VALVES ITAAC Numerous installation problems with check valves in operating plants have been identified through operating experience and NRC staff's inspections. Therefore, in addition to the acceptance criteria for design and qualifications described in the SSAR, tests of installed (active) safety-related check valves are required in each system ITAAC. These tests will be conducted under system preoperational pressure, fluid flow, and temperature conditions to assure that the valves open and/or close as expected based on the direction of the differential pressure across the valves. 11. INDEPENDENCE FOR ELECTRICAL AND I&C SYSTEMS ITAAC This ITAAC verifies that independence is provided between Class 1E divisions (if applicable), and between Class 1E and non-Class 1E equipment, using tests of the installed equipment. DRAFT Rev. 0 - April 1996 14.3-68 [This Page Intentionally Left Blank] SRP Draft Section 14.31 Attachment A - Proposed Changes in Order of Occurrence 14.3-69 DRAFT Rev. 0 - April 1996 Item numbers in the following table correspond to superscript numbers in the redline/strikeout copy of the draft SRP section. Item Source Description 1. Integrated Impact 1533 The scope and content