Document: NUREG-0800
Document ID: 988a555f-fdfa-4452-829d-c06654bfbba5
Document Type: srp
Title: Initial Plant Test Program - Design Certification and New License Applicants
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070660618.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.2
CFR Part: 
CFR Title: 

Content:
ional power supply and physical separation standard ITAAC in Appendix D to this SRP section. C. Capacity and Capability. Sizing of sources and distribution equipment, Loading - analyses to demonstrate that the equipment has adequate capacity to support accomplishment of a safety function. Tier 2 should discuss the analyses. Testing should be included to demonstrate the EDG capacity and capability. These can be based on the Technical Specifications. (NOTE: Margin - in some cases regulatory guidance specifies the need for margin in capacity to allow for future load growth. If it is only for future load growth, ITAAC does not need to check for the additional margin.) Voltage - analyses to demonstrate the acceptability of voltage drop and verify its adequacy to support the accomplishment of a direct safety function. Tier 2 would include the discussion of how the voltage analyses should be performed, i.e., reference to industry standards or company practice as appropriate. Testing should show the EDG voltage and frequency response. This is the same as Technical Specifications. D. Equipment Protective Features. Inclusion should be based on the potential for preventing safety functions and the operating experience. - Equipment short circuit capability and breaker coordination should be included by specifying ITAAC for analyses. The description of the analyses should be in Tier 2. - Similarly, diesel generator protective trips (and bypasses if applicable) should be considered. A bypass example might be LOCA signals which bypass EDG trips, however specifying that in the DD and ITAAC would probably lock a design into this approach and there is the alternative approach of providing coincidence for the trips. The information in Tier 1 should be written to allow for options which can then be described in Tier 2. - If the fire analyses rely on fire caused faults to be cleared, this may need to be treated in the DD and ITAAC. It may be covered by the breaker coordination (see