<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">We have used 2.8M litres of liquid He since 1972. Losses amount to 11.8% on that period and varied between 5 and 9% over the past 10 years. 10% losses is easy and 5% is feasible but requires a permanent staff checking regularly equipment and usage.</div><div class=""><br class=""></div><div class="">Best wishes,</div><div class="">Eddy</div><div class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 10 Sep 2019, at 21:15, Scott Hannahs <<a href="mailto:sth@info-igor.org" class="">sth@info-igor.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Yes, I participated in a workshop with the APS on the “economics of helium” a couple of years ago trying to find ways to maintain the availability for research. Recycling is good for almost all materials, helium is even more non-renewable than most since if left in the atmosphere it evaporates into space.<br class=""><br class="">To be clear we “use” by flowing through magnets etc. 800,000 liters/year, we recover and recycle ~700,000 liters/year. I hope to reduce that loss but tracking down where it is being lots in a facility of 500 people is a bit of a problem. We are instrumenting the system a lot to try to find more low hanging fruit.<br class=""><br class="">-Scott<br class=""><br class=""><blockquote type="cite" class="">On Sep 9, 2019, at 12:19 PM, DiVerdi,Joseph <<a href="mailto:Joseph.DiVerdi@ColoState.EDU" class="">Joseph.DiVerdi@ColoState.EDU</a>> wrote:<br class=""><br class="">Recycling is a very important part of addressing our societal use of this precious resource. Kudos to you crazies at the (national) magnet lab! J<br class=""><br class=""></blockquote><br class="">_______________________________________________<br class="">Info-igor mailing list<br class=""><a href="mailto:Info-igor@lists.info-igor.org" class="">Info-igor@lists.info-igor.org</a><br class="">http://lists.info-igor.org/listinfo.cgi/info-igor-info-igor.org<br class=""></div></div></blockquote></div><br class=""></div></body></html>