Document: NUREG-0800
Document ID: 97120913-d26f-4324-ab62-22f3f5b73925
Document Type: srp
Title: and 8.3.2.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0636/ML063600410.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
ing any known lightning transient to the system. An LPS should be visually inspected at least annually. In areas where severe climatic changes occur, it is advisable to inspect the LPS semiannually or following extreme changes in ambient temperature. The reviewer should verify that testing and maintenance procedures are established for each LPS. The frequency of testing and maintenance will depend on weather-related degradation of protective features, frequency and severity of damage attributable to lightning transients, and required protection level. The LPS testing and maintenance program is reviewed for the following activities: (1) inspection of all conductors and system components, (2) tightening of all clamps and splices, (3) measurement of the earth grounding resistance, (4) measurement of the resistance of 8.2-21 Revision 4 - March 2007 ground terminals, (5) inspection or testing (or both) of surge protection devices (SPDs) to assess their effectiveness, (6) periodic testing and maintenance of earth grounding systems, (7) refastening and tightening of components and conductors as required, (8) inspection and testing when the LPS has been altered by additions to, or changes in, the structure, and (9) complete records. 3. General Design Criteria 33, 34, 35, 38, 41, and 44 sets forth requirements for the safety systems whose source of power is the preferred power system. These criteria state that safety system redundancy shall be such that, for preferred power system operation (assuming standby power is not available), the system safety function can be accomplished assuming a single failure. To ensure that these requirements of the General Design Criteria identified above are satisfied, the electrical schematics of the systems required for reactor coolant makeup, residual heat removal, emergency core cooling, containment heat removal, containment atmosphere cleanup, and cooling water should be examined to ensure that the circuits from the preferred power system