HEPA Filter Differential Pressure Fan Interlock System Functional Requirements and Technical Design Criteria

TUCK, J.A.

CH2M Hill Hanford Group, Inc.

关键词: Blowers;    Air Filters;    Particulates;    Filtration;    Ventilation Systems;   

DOI  :  10.2172/803661
RP-ID  :  RPP-5977, Rev.0
RP-ID  :  AC27-99RL14047
RP-ID  :  803661

美国|英语

来源: UNT Digital Library

【 摘 要 】

Double-shell tanks (DSTs) and Double Contained Receiver Tanks (DCRTs) are actively ventilated, along with certain single-shell tanks (SSTs) and other RPP facilities. The exhaust air stream on a typical primary ventilation system is drawn through two stages of high-efficiency particulate air (HEPA) filtration to ensure confinement of airborne radioactive materials. Active ventilation exhaust stacks require a stack CAM interlock to detect releases from postulated accidents, and to shut down the exhaust fan when high radiation levels are detected in the stack airstream. The stack CAM interlock is credited as a mitigating control to stop continued unfiltered radiological and toxicological discharges from the stack, which may result from an accident involving failure of a HEPA filter. This document defines the initial technical design baseline for a HEPA filter AP fan interlock system.