Availability Analysis of the Ventilation Stack CAM Interlock System

YOUNG, J.

Lockheed Martin Hanford Corporation

关键词: Ventilation Systems;    Air Pollution Monitors;    Stacks;    Interlocks;    Safety Analysis;   

DOI  :  10.2172/801135
RP-ID  :  RPP-5453, Rev.0
RP-ID  :  AC27-99RL14047
RP-ID  :  801135

美国|英语

来源: UNT Digital Library

【 摘 要 】

Ventilation Stack Continuous Air Monitor (CAM) Interlock System failure modes, failure frequencies and system availability have been evaluated for the RPP. The evaluation concludes that CAM availability is as high as assumed in the safety analysis and that the current routine system surveillance is adequate to maintain this availability. Further, requiring an alarm to actuate upon CAM failure is not necessary to maintain the availability credited in the safety analysis, nor is such an arrangement predicted to significantly improve system availability. However, if CAM failures were only detected by the 92-day functional tests required in the Authorization Basis (AB), CAM availability would be much less than that credited in the safety analysis. Therefore it is recommended that the current surveillance practice of daily simple system checks, 30-day source checks and 92-day functional tests be continued in order to maintain CAM availability.