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:
fied to perform their safety functions under certified design differential pressure, system pressure, fluid temperature, ambient temperature, minimum voltage, and minimum and/or maximum stroke-time in either the open or close direction, or both, depending on the valve's safety functions. The MOV qualification program relies on testing of each size, type, and model. The testing and acceptance criteria for qualification are described in Tier 2. Numerous problems with MOVs in operating plants have been identified over the past several years through operational experience, licensee programs in response to NRC Generic Letter 89-10, and NRC staff inspections. Therefore, in addition to the configuration ITAAC, tests of the installed MOVs are required in each system ITAAC that have MOVs. 2. HYDROSTATIC TEST ITAAC General Design Criterion 14 of 10 CFR Part 50, Appendix A requires that the reactor coolant pressure boundary be designed, fabricated, erected, and tested so as to have an extremely low probability of abnormal leakage. In addition, General Design Criterion 30 requires that components which are part of the reactor coolant pressure boundary be designed, fabricated, erected, and tested to the highest quality standards practical. The pressure boundary integrity will be ensured, in part, through a test verifying the leak-tightness of the ASME Code piping systems. Therefore, a hydrostatic test is specified as a part of the ITAAC for the appropriate individual piping systems. The scope of the hydrostatic test for the ITAAC is for ASME Code Class 1, 2, and 3 piping systems. 3. NET POSITIVE SUCTION HEAD (NPSH) ITAAC The system ITAAC will verify that pumps with direct safety functions (typically ECCS, RHR and SLCS pumps) have the required NPSH to accomplish their safety function by a combination of test and analysis. The analysis method for determining NPSH will typically be provided in the DCD Tier 2. 4. DIVISIONAL POWER SUPPLY ITAAC Electrical independence (separation)