Water Induction Detector (Gamma Based)

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Gamma Based Water Induction Detector is a non-intrusive (clamps onto the pipe), easy to install, quantitative instrument for the continuous monitoring of steam systems.  The Detector can be used to monitor a single location or a complete system and the Alarm can be adjusted to trigger when 5 to 90% liquid water enters the pipe.  The Detector is suitable for conditions up to 2800 psi and 1100<FONT SIZE="1" COLOR="#000000" FACE="Arial" >o</FONT>F.</div> <div> <B>Background</B></div> <div> Water induction through the steam piping of utility and industrial steam cycles is a low frequency high impact event.  In some operating units, main, reheat, and extraction steam pipes get partially or completely filled with liquid water that then moves down stream and damages turbines, steam traps, feedwater heaters, and other equipment.  In susceptible units, this usually happens during startup and other transient operation.  Occasionally, water induction or re-entrainment occurs all of the time.  To prevent damage due to water induction, early detection of the increase in water content and rapid corrective actions are needed.</div> <div> <B>Description</B></div> <div> A weak gamma ray source and detector combination is externally mounted on the pipe to be monitored (Figure 1).  The Detector can be mounted over thermal insulation in any position.  The output is calibrated as the percentage of liquid in the steam with the alarm set to any chosen liquid concentration.  The Detector will work on any pipe size over 2 in. ID and for any common wall thickness.</div> <div>                       <IMG SRC="1eebbc30.gif" border=0 width="187" height="195" ALT="Microsoft Picture" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <B>Figure 1.  Water Induction Detector Installed on a Pipe</B></div> <div> <B>Testing Service</B></div> <div> Jonas, Inc. will install the Detector(s) and perform monitoring of typical startup, steady load, and shutdown operation to determine where and when water induction occurs. </div> <bR> <bR> <bR> <DIV ALIGN="LEFT"></DIV> <div> <IMG SRC="1e266430.gif" border=0 width="358" height="67" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <bR> </td> </tr></table></body>