Document: NUREG-0800
Document ID: 4139e3ab-3087-44d3-8f66-193711d2480a
Document Type: srp
Title: EMERGENCY DIESEL ENGINE STARTING SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350041.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.6
CFR Part: 
CFR Title: 

Content:
and automatic means of maintaining the receiver pressure within an allowable range, and suitable low pressure alarms. If there are piping interconnections between the dedicated air start systems, they are reviewed to verify that a failure in the inter- connecting piping could not lead to the loss of starting of more than one diesel engine. The building layout drawings are examined to ascertain that sufficient space has been provided around the components to permit inspection. The reviewer verifies that the air starting system meets the specific criteria given in subsection II, item 4 of this SRP section. 3. The SAR is reviewed to assure that each diesel engine air start system has its own compressor and that the compressor capacity is adequate with respect to the air receiver capacities of the dedicated air starting system. 4. The reviewer verifies that the system has been designed to be operated and maintained in the event of adverse environmental conditions such as hurricanes, tornadoes, or floods, and is protected against the effects of internally or externally generated missiles. 9.5.6-4 Rev. 2 - July 1981 5. The reviewer determines that the failure of nonseismic Category I systems, structures, or components located close to the EDESS will not preclude operation of the system. 6. The reviewer determines that measures have been taken in the design of the EDESS to preclude the fouling of the air start valve or filter with moisture and contaminants such as oil and rust carryover. An air dryer(s) should be installed upstream of the air receiver(s) for the removal of entrained moisture. 7. The reviewer determines that essential portions of the EDESS are protected from the effects of high- and moderate-energy line breaks. Layout drawings are reviewed to assure that no high- or moderate-energy piping systems are close to the system, or that protection from the effects of failure are provided. The means of providing such protection are discussed in Section 3.6 of the