Cm 01 02 No Disc Crack ((EXCLUSIVE))

All the countries that operate commercial nuclear power plants are planning to dispose of the waste in underground geologically stable repositories. The materials being studied for the fabrication of the containers include carbon steel, stainless steel, copper, titanium and nickel alloys. The aim of this work is to review results from research performed using the alloys of interest regarding their resistance to environmentally assisted cracking (EAC) under simulated repository conditions. In general, it is concluded that the environments are mild and that the studied metals may not be susceptible to cracking under the planned emplacement conditions.

Drilling - This week we drilled a total of 79.869 meters. The bore hole depth is 698.723 meters. Average core length was 2.41 meters. The longest core drilled this week was 2.567 meters. Between the depths of 638.35 and 633.72 three ~2 meter cores were saved by NICL to be possibly used for our brittle ice acceptance test. Our intent is two drill three more cores to replace these when we hit 730 meters. The first three cores were saved in case something was to happen causing us to discontinue drilling before reaching 730 meters. We are starting to see more cores with a fracture in them when they are pushed from the core barrel. However it is rare to see more than one fracture in a 2.5 meter core. We have yet to see core with poker chipping.

6/27/06 Tuesday- Brian continues testing different saw blades and drop rates. Geoff tries to get printer/wireless working. Conducted Brittle Ice Acceptance Test (ICDS wanted to try one now in case the drill failed at some point. We will conduct another test when the depth is at least 730 meters.) ICDS passed this test with ease. Tested "vacuum wand" on smooth and broken ice (some that we had broken,) today. The wand worked quite well, and did not pick up any major ice pieces. The ice appeared to have more ridges (~1 mm deep,) on it today, but the microcracks along the core were not as bad.

6/28/06 Wednesday - Basement for core drying tests started. Brian helped with the digging/setup. Brian bags and stores core so we will have several cores to test in the drying booth. Geoff finally got the printer to go using USB connection to server, and printed some core cards. Tried "containing" ice that we broke with panty hose. It does not work so well (rips,) possibly due to the fact that the panty hose is for "svelte sized" women. We took a piece of core from after the FED as a control sample. ICDS switched cutter teeth to a smaller radius today. The microcracks appear to occur with increasing frequency, and there is bad pitting. Started wiping the core with towels after the FED to try and gauge wetness. The towels removed some Isopar, but it is still very hard to quantify the amount.

6/29/06 Thursday - Basement is finished, many thanks to the VECO folks who did the work to make it happen. We started placing core into this new storage area. Changed out suction inlet to R2D2 so that we can test that vacuum with the FED. Jay from ICDS turned the "barrel to FED bridge" down a bit so that the barrel end will fit into the barrel. This has proved a benefit, when trying to pass broken ice through the FED. Brian took a "wet" ice sample by cracking the top end of the core (cracking the first 20 cm or so of core,) which passed easily through the FED by using the Barrel FED bridge. Mounted the digital measuring stick, and began testing for long term temperature tolerance and calibration. ICDS tried to do an azimuth alignment with two cores. The azimuth was out of line by 180 degrees. We did another later in the day, and the azimuth was 90 degrees out of phase. We tested NICL's small VOC detectors, but they did not work with the Isopar (the detectors need the Isopar to be more volatile.) We looked into firn cooling the tent, but decide that it was not very feasible. The snow is very packed around the NICL tent (due to traffic, etc.) and there are power lines buried all around. ICDS tried moving around cutter heads to try and find the reason that every 4th cut is deeper than the other three. The first ~30-40 cm of the cores today also had a very deep (~2mm,) rough cut pattern. This is possibly due to the drill "pushing" into the core initially.

6/30/06 Friday - Geoff worked on emails, WAIS 90% drawings, and tried to cobble up a quickie database to test the usability of the digital measuring stick. Brian continued logging core, and took samples for 2, 4, 8, and 12 hour Isopar drying tests. All of the cores mated perfectly with the others today. Jay eased cutters towards the end of today and the rough ~30 cm is gone. The micro cracks and deeper 4th cut is still present, but this core is much nicer. After this, the core looked the best that it has in a week.

Pseudoterminals, or PTYs, are used to create login sessions or provideother capabilities requiring a TTY line discipline (including SLIP orPPP capability) to arbitrary data-generation processes. Each PTY hasa master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named/dev/tty[p-za-e][0-9a-f]. The kernel arbitrates the use of PTYs byallowing each master side to be opened only once. 2b1af7f3a8