Document: NUREG-0800
Document ID: 72755eb7-49f0-4442-a13a-2e990c4e3733
Document Type: srp
Title: EQUIPMENT AND FLOOR DRAINAGE SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350554.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.3
CFR Part: 
CFR Title: 

Content:
on has been provided and his review supports conclusions of the following type, to be included in the staff's safety evaluation report: The equipment and floor drainage system includes all piping from equipment or floor drains to the sump, the sump pumps, and the associated pumps and piping network necessary to route effluents to the drain tanks and then to the radwaste system. Portions of the EFDS which are safety related as determined by the following criteria are classified Seismic I and Quality Group C. 9.3.3-5 Rev. 2 - July 1981 a. If the system is capable of detecting leaks in safety systems that utilize the drainage system sumps, and is the only means for such leakage detection, it is considered safety related in this' regard. b. If the system can cause the inundation of safety-related areas due to drain back flow that may result from malfunction of active components, blockage or the probable maximum flood, it is considered safety related in this area. c. If the system is connected so that an inadvertent transfer of contaminated fluids to noncontamrinated-drainage can occur, it is considered safety related in this area. d. If a failure or malfunction in a portion of the system could result in adverse effects on essential systems or components (i.e., necessary for safe shutdown, accident prevention or accident mitigation) it is considered safety related in this area. The basis for acceptance in the staff review has been conformance of the applicant's designs and design criteria for the essential portions of the equipment and floor drainage system and necessary auxiliary supporting systems to the Commission's regulations as set forth in the general design criteria, and to applicable regulatory guides, staff technical positions, and industry standards. The staff concludes that the design of the equipment and floor drainage system is acceptable and conforms to the requirements of General Design Criteria 2, 4, and 60 with respect to seismic design, environmental