Document: NUREG-0800
Document ID: d9e9d0a9-6390-4154-94dc-7d5e6d8145cd
Document Type: srp
Title: A-C POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350489.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
nd diesel generator rooms. The ASB will verify the adequacy of the H&V system design to maintain the temperature and relative humidity in the room required for proper operation of the safety equipment during both normal and accident conditions. It will also verify that redundant H&V systems are located in the same enclosure as the redundant unit they serve, or are separated in accordance with the same criteria as those for the systems they support. 7. System Testing and Surveillance In ensuring that the proposed periodic onsite testing capabilities of the a-c. onsite power system satisfies the requirements of General Design Criterion 18 and the positions of Regulatory Guides 1.108 and 1.118, the descriptive information (CP and OL stages) functional logic diagrams (CP and OL stages), and electrical schematics (OL stage) are reviewed to verify that the design has the built-in capability to permit integral testing of Class 1E systems on a periodic basis when the reactor is in operation. The descriptive information (CP and OL stages) and the design implementation as depicted on electrical drawings (OL stage) of the means proposed for automatically indicating at the system level a bypassed or deliberately inoperative status of a redundant portion of a safety related system are reviewed to ascertain that the design is consistent with.Regulatory Guide 1.47 and Branch Technical Position ICSB 21 *(PSB). This position establishes the basis to be considered in arriving at an acceptable design for the inoperable status indication system. 8. Fire Protection for Cable Systems In ensuring that the requirements .of General Design Criterion 3 have been met, CMEB will review the design of the fire stops and seals, including the materials, their characteristics with regard to flammability and fire retardancy, and their fire underwriters rating in accordance with SRP Section 9.5.1. All cable and cable tray penetrations through walls and floors as well as any other types of cable ways