Document: NUREG-0800
Document ID: cad7a703-c5bb-48ce-bbc4-d11359471665
Document Type: srp
Title: through 9.5.8 cover the review of various essential elements of the emergency
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350037.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.4
CFR Part: 
CFR Title: 

Content:
nd seismic classification as indicated in subsection I of this SRP section. The PSB assures that essential portions of the EDEFSS including the isola- tion valves separating essential and nonessential portions are classified Quality Group C and Seismic Category I. Components and system descriptions in the SAR that identify mechanical and performance characteristics are reviewed to verify that the above seismic and quality group classifica- tions have been included and that the P&IDs indicate any points of change at the systems and/or systems components interfaces. 9.5.4-4 Rev. 2 - July 1981 5. The reviewer verifies that the design is such as to minimize the creation of turbulence of the sediment at the bottom of the fuel oil storage tank or the chance of deleterious material entering the system during recharging, or by operator error, or due to natural phenomena. The reviewer will ascertain that provisions or a program have been incorporated to assure that the quality of the stored fuel oil meets minimum requirements at all times. 6. The descriptive information and drawings in the SAR-are reviewed to verify that: a. Each storage tank is equipped with an outside fill and vent line, located and protected so as to minimize the chance of damage, from vehicles, tornado, tornado missiles, and floods. The fill and vent point should be located higher than the PMF flood level. Each tank is also provided with a stick gauge connection for determining fuel level in the tank. b. The minimum onsite inventory of fuel oil for each redundant diesel- generator system is sufficient to enable the diesel generators to power required engineered safety features for a period of seven days following any design basis accident and loss of offsite power. c. The physical location of the day tank associated with each diesel- generator set is located at an elevation to assure a slight positive pressure at the engine-driven fuel oil pump(s). Where this require- ment is contrary to manufacturers'