Wednesday, April 13, 2022, 10:50

P2NC-220323

Preparing the P2N-UCx for online operation on June 2022

Two cartridges were filled with annular UO2/C foils last week.

48 cartridges total

Today, Darwin and I are placing one of the two cartridges in the EVAP1. The cartridge is P2NC-220323.

Thursday, April 14, 2022, 09:34

Carbothermal reduction heating process started with a ramp rate of 3 A/min

Pressure 1.8E-6T

Thursday, April 14, 2022, 10:31

Paused autoramp because pressure increasing too rapidly. Will continue ramp up once pressure stabilizes.

Thursday, April 14, 2022, 11:20

autoramp restarted @3A/min

IGP1=2.7E-4 Torr

Thursday, April 14, 2022, 13:24

After first major outgass finished and pressure trending down, increased autoramp to 5A/min to 600A

Thursday, April 14, 2022, 13:27

IGP1 = 3.3E-4A

TGHT = 600A, 2.5V

decrease ramp rate to 3A/min to 650A

Thursday, April 14, 2022, 13:45

Set autoramp to 670A

Thursday, April 14, 2022, 13:52

paused autoramp at 668A because pressure increase too steep. 

Changed ramp rate to 0.5A/min and restarted ramp up to 700A

Thursday, April 14, 2022, 15:20

Continued increase in current towards 700A while pressure decrease indicated completeness of reduction.

Started rampdown to 650A.

Pressure was 1.7E-4 Torr on IGP1

Friday, April 15, 2022, 06:28  

The current was reduced to 500A @ 3:50 PM yestesterday.

Currently, TGHT = 500A, 2.0V

started aurtoramp down @ -2A/min

IGP1= 2.4E-6 Torr

Monday, May 02, 2022, 12:32

Cartridge reloaded onto EVAP 1. Will heat back up to check carbothermal reduction. 

Tuesday, May 03, 2022, 08:40

IGP1= 1.32e-6 Torr

Good vacuum 1e-1 Torr

Bad vacuum 5e-1 Torr

Autoramp set to 1A/10s to 500A

Autoramped up to 750A @ 1A/10s.  Only slight pressure increases observed areound 150A and 650A to 700 A.  Parameter curves will be evaluated.

Tuesday, May 03, 2022, 11:11

Started rampdown at -1A/10s. 

IGP1 was 3.0e-5 Torr and trending down when rampdown started