Document: NUREG-0800
Document ID: 5b0d8000-eb22-442c-a759-c14fed5c9c67
Document Type: srp
Title: EQUIPMENT AND FLOOR DRAINAGE SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070535.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.3
CFR Part: 
CFR Title: 

Content:
ssentialSafety-related portions of the EFDS are classified Quality Group C or 45 higher and seismic Category I. Components and system descriptions in the SAR are reviewed by ASBSPLB to verify that the seismic and safety classifications 46 have been included, and that the P&IDs indicate any points of change in piping quality group classification. The review for seismic design is performed by the SEBECGB and the review for seismic and quality classification is performed by 47 the MEBEMEB as indicated in subsection I of this SRP section. 48 3. The reviewer verifies that the system safety functions will be maintained, as required, in the event of adverse environmental phenomena such as earthquakes, or in the event of certain pipe breaks. The reviewer evaluates the system, using engineering judgment, failure modes and effects analyses, and the results of reviews performed under other SRP sections, to determine that: a. Failure of nonessentialnonsafety-related portions of the system, or of other 49 systems not designed to seismic Category I Standards and located close to essentialsafety-related portions of the system, or of nonseismic Category I 50 structures that house, support, or are close to essentialsafety-related portions of 51 the EFDS, will not preclude operation of the essentialsafety-related portions of 52 the EFDS. Reference to SAR Chapter 2 (which describes site features) and the general arrangement and layout drawings will be necessary. Statements in the SAR to the effect that the above conditions are met are acceptable. b. System capability to prevent drain or flood water from backing up in the drainage system into areas housing safety-related equipment has been incorporated. Statements in the SAR that this capability is provided are acceptable. c. Provisions are made in the system to control and direct the flow of radioactive waste fluids to the radwaste area. It will be acceptable if the system P&IDs and design criteria show that the potential for