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[videbaek <videbaek AT bnl.gov>]

Hi Zhenyu,

I am not sure what additional tests you are proposing? 3M gave a limit 
for water content, and measurements by experts found it was very low. So 
do you trust this advice and measurements or not?

best Flemming



On 2021-10-20 16:20, Ye, Zhenyu wrote:
> The reason that I propose to use the new barrels in Run22 is to avoid
> having any potential problem in the middle of the run.
> The opened drum has been in its current status in 6 years so it will
> not make a big difference to let it sit for another 6 months (let me
> know if you think otherwise). We will have plenty of time to test use
> it in the summer and continue using it in Run23 and beyond if no
> problem is found.
>
> Zhenyu
>
> > On Oct 20, 2021, at 3:13 PM, Sharma, Rahul <rsharma AT bnl.gov> wrote:
> >
> > I agree with Elke
> >
> > * Rahul
> >
> > From: Star-fst-l <star-fst-l-bounces AT lists.bnl.gov> On Behalf Of
> > Aschenauer Elke-Caroline
> > Sent: Wednesday, October 20, 2021 4:12 PM
> > To: Ye, Zhenyu <yezhenyu AT uic.edu>
> > Cc: Star-fst L <star-fst-l AT lists.bnl.gov>
> > Subject: Re: [Star-fst-l] NOVEC from the opened drum is good to use
> >
> > sorry, maybe I’m on the wrong track, but would it not be better to
> > use the open NOVEC as fast as possible to avoid that it gets water
> > in it.
> >
> > Cheers elke
> >
> > On Oct 20, 2021, at 15:59, Ye, Zhenyu <yezhenyu AT uic.edu> wrote:
> >
> > Thank you for the efforts, Prithwish.
> >
> > I would propose to continue using the small barrels of new NOVEC for
> > run 22, and use the NOVEC from the opened drum from PHENIX towards
> > the end of the run or in the summer.
> >
> > Zhenyu
> >
> > On Oct 20, 2021, at 2:34 PM, Tribedy, Prithwish <ptribedy AT bnl.gov>
> > wrote:
> >
> > Hello Everyone,
> >
> > Good news!! The report from the chemistry lab has arrived. The
> > water contamination in the remaining NOVEC liquid from the opened
> > drum is well below 90 ppm (as required for safe operations according
> > to the 3M experts).
> >
> > We provided the chemists with three samples: 1) from the top layer
> > of the opened drum (Sample A TOP), 2) from the bottom of the opened
> > drum (Sample B BOT) and, 3) from a newly opened small NOVEC
> > container (Sample C SML). All the samples have been checked twice
> > and found to have water contaminations at the level of 41-44 ppm.
> > This level of contamination is permissible for safe operations as
> > per our previous communication with the 3M experts.
> >
> > So, we can go ahead and use the NOVEC from the opened drum for the
> > upcoming run.
> >
> > We're grateful to our colleagues from the Neutrino and Nuclear
> > Chemistry group of the Chemistry Department at BNL.
> >
> > Regards,
> >
> > Prithwish
> >
> > Prithwish Tribedy
> >
> > Physics Department, Brookhaven National Laboratory
> >
> > Upton, NY 11973, USA
> >
> > Phone: 631-344-8904, 631-344-3853
> >
> > E-mail: ptribedy AT bnl.gov
> >
> > Begin forwarded message:
> >
> > From: "Gokhale, Sasmit" <sgokhale AT bnl.gov>
> >
> > Subject: Water content analysis of C4F9OC2H5 coolant liquid
> >
> > Date: October 20, 2021 at 2:28:28 PM EDT
> >
> > To: Prithwish Tribedy <ptribedy AT icloud.com>, "Yeh, Minfang"
> > <yeh AT bnl.gov>
> >
> > Cc: "Hu, Yu" <yuhu AT bnl.gov>
> >
> > Hello Prithwish,
> >
> > I hope you are doing well. I have finished analyzing the three
> > samples that you gave us. I ran two Karl Fischer titration
> > measurements for each of the three bottles that you provided i.e.
> > one sample was collected from the top and bottom of the each bottle.
> > Below are the results:
> >
> > Sample A BOT:
> >
> > Measurement 1: water content = 43.98 ppm
> >
> > Measurement 2: water content = 44.89 ppm
> >
> > Sample B TOP:
> >
> > Measurement 1: water content = 42.22 ppm
> >
> > Measurement 2: water content = 43.23 ppm
> >
> > Sample C SML:
> >
> > Measurement 1: water content = 41.98 ppm
> >
> > Measurement 2: water content = 41.79 ppm
> >
> > To check the accuracy, I also ran a sample of one of our organic
> > solvents which should have a water content between 60 to 80 ppm and
> > the measured water quantity for that liquid was 63.18 ppm. So it
> > seems the measured values can be trusted.
> >
> > Please let me know if you have any further questions.
> >
> > Best Regards,
> >
> > Sasmit
> >
> > Sasmit Gokhale
> >
> > Research Associate
> >
> > Brookhaven National Lab
> >
> > Building 555
> >
> > Upton, NY 11973
> >
> > Phone: 631-344-4992
> >
> > Email: sgokhale AT bnl.gov
> >
> > <image001.png>
> >
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--
Flemming Videbaek
senior scientist
videbaek @ bnl.gov
Brookhaven National Lab
Physics Department
Bldg 510D
Upton, NY 11973

phone: 631-344-4106
cell     :  631-681-1596