Recycler Ecool Shutdown Status 7 29 2009 6 5 weeks

Recycler/Ecool Shutdown Status (7/29/2009)

6. 5 weeks into the shutdown… § Ecool is on track for starting up on August 19 th (gas transfer) Ø Interlocks tested yesterday (U-bend mode only) § Recycler vacuum should be in decent shape by the start-up time Ø More on that later… 2

Recycler planned jobs update § Pot RR 129 (i. e. MI-10 injection kicker) Ø Should be completed by Friday § Move 6 magnets (complete) § Vacuum maintenance (excluding vented sections) Ø Leak checking 800 line • Found one leak at BPM HP 804 yesterday • Continue with leak checking around multi-wire today Ø At least one other sector (100 -103) to leak check Ø Multiple ion pumps to service Ø TSPs to sublimate § Power supplies maintenance Ø In progress § CIA crate activities (80% complete as of Friday) § HLS installation at MI-10 Ø ALARA plan has been reviewed • Plan on installing hardware next week 3

ECOOL jobs update § Pelletron maintenance (50% complete) Ø Most of mechanical work inside the tank has been completed • Chain running test successfully completed • Collector water system purged, cleaned and refilled • Inspection of the shaft bearings remains to be done Ø Electrical work mostly completed • Tentative software change for negative pulsing mode – Would require to swap modulators Ø The rest of the work is outside the tank • Desiccant regeneration • Transfer skid maintenance • Install pressure relief valve § Likely cancel 4” GVM installation and buy another 2” GVM Ø No hot spare at the start of the run 4

ECOOL jobs update (cont’) § Flush Water/Glycol skid (and magnets) (Complete) Ø Transfer skid water loop has been isolated from the cooling skid water loop Ø Both systems filled with water/glycol mix • Chiller has been running since Monday Ø New instrumentation needs to be connected to ACNET • Not needed for running § NMR probes replacement (90% complete) Ø One last probe needs to be tuned in 5

Protecting the Recycler during Nona’s construction work § ~240 m of the ring (7. 5%) under N 2 since late June Recycler magnet Herculite 401 -409 Lead blankets Note: There was quite a bit of water coming from the sealing when they were done digging 103 -109 Catch pans 6

Recycler pump out started on Monday at 401 -409 § All major jobs* done in the 40 region Ø Pump out got delayed by manifold problems § Grouting still to be done at MI-10 Ø Deadline: next Wed. N 2 Venting line to Recycler vacuum chamber Vacuum gauge and RGA controllers * Major jobs do not account for pipe fitting activities which will last until the end of the shutdown 7

First indications are that we will NOT have to bake § Estimation: ~15% of water Ø We want less than 10% H 2 Water H 2 N 2 CO 2 Reference Water N 2 CO 2 IPs on for 20 hours TSPs not sublimated 8

Pumping history (IPs only) § Sublimate TSPs when low 10 -9 Torr is reached or pumping stalls Ø Likely before the weekend 9

Magnets motion at MI-40 Backfilling started on July 15 th Last 5 feet of dirt removed on June 23 rd/24 th 10

Unexplained drift of the average Some correlation with barometric pressure ? This part could be temperature evaporation 11