<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="color: rgb(0, 0, 0); font-family: "Times New Roman",Times,serif; font-size: 12pt;">
<p style="font-family: "Times New Roman",serif; font-size: 12pt; margin-right: 0in; margin-left: 0in;margin-top:4.8pt;margin-right:0in;margin-bottom:9.6pt;margin-left:
0in">
<span style="font-size:10.5pt;font-family:""",serif;color:#313131">ESR Crate 1 24VDC power supply was degrading with intermittent voltage dips, which were increasing in frequency and magnitude. Since ESR EOC1 controls the main compressor system, a plant
shutdown was needed for investigation.</span></p>
<p style="font-family: "Times New Roman",serif; font-size: 12pt; margin-right: 0in; margin-left: 0in; margin-top:4.8pt; margin-right:0in; margin-bottom:9.6pt; margin-left:
0in">
<span style="font-size:10.5pt;font-family:""",serif;color:#313131">In preparation for beam operations, ESR was temporarily shutdown for troubleshooting the crate, which revealed the need to replace the crate power supply.
</span></p>
<ul style="margin-bottom: 0in">
<li><span style="font-size:10.5pt;font-family:""",serif;
color:#313131">Turbines shutdown at 1052 on 7Nov19</span></li><li><span style="font-size:10.5pt;font-family:""",serif;
color:#313131">Second two turbines restarted at 1225 on 7Nov19</span><br>
<br>
<span style="font-size:10.5pt;font-family:""",serif;color:#313131">The recovery of the ESR 4.5K loads (Halls A, B, C) are still in progress.</span><br>
</li></ul>
</div>
<div id="Signature">
<div id="divtagdefaultwrapper" style="font-size:12pt; color:#000000; font-family:Calibri,Helvetica,sans-serif" dir="ltr">
<div>
<p style="margin-top: 0px; margin-bottom: 0px;margin:0px 0px 10.66px; line-height:105%">
<span style="margin:0px; line-height:105%; font-family:"Times New Roman",serif; font-size:12pt">-----------------</span></p>
<p style="margin-top: 0px; margin-bottom: 0px;margin:0px"><b><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">Joe D. Wilson, Jr.</span></b></p>
<p style="margin-top: 0px; margin-bottom: 0px;margin:0px"><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">Cryogenic Operations Engineer</span></p>
<p style="margin-top: 0px; margin-bottom: 0px;margin:0px"><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt"> </span></p>
<p style="margin-top: 0px; margin-bottom: 0px;margin:0px"><b><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">Jefferson Lab</span></b></p>
<p style="margin-top: 0px; margin-bottom: 0px;margin:0px"><a href="http://www.jlab.org/"><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt"><font color="#0563c1">www.jlab.org</font></span></a><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt"></span></p>
<p style="margin-top: 0px; margin-bottom: 0px;margin:0px"><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">office desk: 757-269-7722</span></p>
<p style="margin-top: 0px; margin-bottom: 0px;margin:0px"><a><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">jwilson@jlab.org</span></a><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt"></span></p>
</div>
<span id="ms-rterangepaste-end"></span><br>
<p style="margin-top: 0px; margin-bottom: 0px;"></p>
</div>
</div>
</body>
</html>