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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:""",serif'><a href="https://logbooks.jlab.org/entry/3590439"><span style='color:#8F6AAF'>Liquid Nitrogen shortage - Warm-up Hall C 15K target</span></a> <o:p></o:p></span></b></p><p class=MsoNormal style='mso-margin-top-alt:1.05pt;margin-right:0in;margin-bottom:1.05pt;margin-left:0in'><b><span style='font-size:10.5pt;font-family:""",serif;color:#313131'>Lognumber <a href="https://logbooks.jlab.org/entry/3590439"><span style='color:#0000EE'>3590439</span></a>. Submitted by <a href="https://logbooks.jlab.org/user/jwilson"><span style='color:#0000EE'>jwilson</span></a> on Thu, 08/23/2018 - 09:05. <o:p></o:p></span></b></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=0 style='width:15.0in;border-collapse:collapse'><tr><td width=241 style='width:209.65pt;padding:.9pt .9pt .9pt .9pt'><p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Times New Roman",serif'>Logbooks: <o:p></o:p></span></b></p></td><td width=1199 style='width:15.0in;padding:.9pt .9pt .9pt .9pt'><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Times New Roman",serif'><a href="https://logbooks.jlab.org/book/clog"><span style='color:#0000EE'>CLOG</span></a><o:p></o:p></span></p></td></tr></table><p class=MsoNormal style='margin-bottom:8.4pt;line-height:15.75pt'><span style='font-size:10.5pt;font-family:""",serif;color:#313131'>The vendor’s plant which supplies JLab cryogenic plants with liquid nitrogen (LN2) has equipment problem. Therefore, JLab LN2 demand must be promptly reduced, which includes warm-up of Hall C 15K target.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:""",serif'><a href="https://logbooks.jlab.org/entry/3590421"><span style='color:#0000EE'>Site liquid nitrogen vendor</span></a> <o:p></o:p></span></b></p><p class=MsoNormal style='mso-margin-top-alt:1.05pt;margin-right:0in;margin-bottom:1.05pt;margin-left:0in'><b><span style='font-size:10.5pt;font-family:""",serif;color:#313131'>Lognumber <a href="https://logbooks.jlab.org/entry/3590421"><span style='color:#0000EE'>3590421</span></a>. Submitted by <a href="https://logbooks.jlab.org/user/creel"><span style='color:#8F6AAF'>creel</span></a> on Thu, 08/23/2018 - 07:38. <o:p></o:p></span></b></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=0 style='width:15.0in;border-collapse:collapse'><tr><td width=241 style='width:209.65pt;padding:.9pt .9pt .9pt .9pt'><p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Times New Roman",serif'>Logbooks: <o:p></o:p></span></b></p></td><td width=1199 style='width:15.0in;padding:.9pt .9pt .9pt .9pt'><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Times New Roman",serif'><a href="https://logbooks.jlab.org/book/hdlog"><span style='color:#0000EE'>HDLOG</span></a> <a href="https://logbooks.jlab.org/book/clog"><span style='color:#0000EE'>CLOG</span></a> <a href="https://logbooks.jlab.org/book/elog"><span style='color:#0000EE'>ELOG</span></a><o:p></o:p></span></p></td></tr><tr><td width=241 style='width:209.65pt;padding:.9pt .9pt .9pt .9pt'><p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Times New Roman",serif'>Entry Makers: <o:p></o:p></span></b></p></td><td width=1199 style='width:15.0in;padding:.9pt .9pt .9pt .9pt'><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Times New Roman",serif'>creel<o:p></o:p></span></p></td></tr></table><p class=MsoNormal style='margin-bottom:8.4pt;line-height:15.75pt'><span style='font-size:10.5pt;font-family:""",serif;color:#313131'>The site liquid nitrogen vendor is reporting problems with their production and delivery systems effecting multiple states. They are unsure the number of deliveries they will be able to make to our facility over the next couple of weeks. We are working with them to understand the scope of the problem and to make decisions based on the best information we have at the time. Our facility requires at least two trucks per day at the CHL and periodically three trucks per day to maintain HDR, CTF, and the Halls. We are trying to get updated information now and will disseminate it asap.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:4.2pt;margin-right:0in;margin-bottom:8.4pt;margin-left:0in;line-height:15.75pt'><span style='font-size:10.5pt;font-family:""",serif;color:#313131'>We are asking our contracting people to see what other sources are available and we are working our contacts at NASA Langley to understand the state of their LN2 plant.<o:p></o:p></span></p><p class=MsoNormal style='line-height:15.75pt'><span style='font-size:10.5pt;font-family:""",serif;color:#313131'>The first blush tiers of possible reduction are<br>A. Stop 15K flow at ESR and shutdown CHL/ESR transferline, drop both CHLs to 4.5K, ramp Hall D magnet to zero current<br>B. Move both linacs to CHL2 at 4.5K and park CHL1 at 80K<br>C.Shutdown CTF<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:4.2pt;margin-right:0in;margin-bottom:8.4pt;margin-left:0in;line-height:15.75pt'><span style='font-size:10.5pt;font-family:""",serif;color:#313131'>More to follow.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:8.0pt;line-height:105%'><span style='font-size:12.0pt;line-height:105%;font-family:"Times New Roman",serif'>-----------------<o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Joe D. Wilson, Jr.<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Cryogenic Operations Engineer<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Jefferson Lab<o:p></o:p></span></b></p><p class=MsoNormal><a href="http://www.jlab.org/"><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0563C1'>www.jlab.org</span></a><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>757-269-7722<o:p></o:p></span></p><p class=MsoNormal><a href="mailto:jwilson@jlab.org"><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#0563C1'>jwilson@jlab.org</span></a><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>