Document: NUREG-0800
Document ID: 4b0fa4a0-ce32-4f59-9360-9426826a668c
Document Type: srp
Title: Rev. 4 — June 1997
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500496.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
not prevent the protection system from accomplishing its safety functions. Because the loss of environmental control systems does not usually result in prompt changes in environmental conditions, the design bases may rely upon monitoring environmental conditions and taking appropriate action to ensure that extremes in environmental conditions are maintained within non-damage limits until the environmental control systems are returned to normal operation. If such bases are used, the applicant/licensee should confirm that there is independence between environmental control systems and sensing systems that would indicate the failure or malfunctioning of environmental control systems. Review of mild environment qualification should also include confirmation that the environmental protection of instrument sensing lines conforms with the guidance of Reg. Guide 1.151. EMI qualification in accordance with the guidance of EPRI TR-102323, "Guidelines for Electromagnetic Interference Testing in Power Plants," is an acceptable means of meeting the qualification requirements for EMI and electrostatic discharge. Rev. 4 — June 1997 SRP 7.1-B-6 Lightning protection should be addressed as part of the review of electromagnetic compatibility. Lightning protection features should conform to the guidance of NFPA Std 78, "Lightning Protection Code," and ANSI/IEEE Std 665, "Guide for Generation Station Grounding." The EELB and EMEB evaluation of conformance to the requirements of GDC 2 and 4 and 10 CFR 50.49 satisfies the requirements for equipment qualification to harsh environments and seismic events. Guidance for the review of this equipment qualification is given in SRP Sections 3.10 and 3.11. 6. Section 4.5 — Channel Integrity Information provided in Sections 3(7) and 3(8) is reviewed to confirm that the design includes the qualification of equipment for the conditions identified in the design bases. Failures may not be credited to protect the integrity of other equipment. The