Jefferson Lab Weekly Briefs April 29, 2009

Jefferson Lab Weekly Briefs

April 29, 2009

12 GeV Upgrade

Phase 1 work of the Central Helium Liquefier (CHL) Building Addition is substantially complete, and the helium tube trailer has been relocated from the west side of the CHL Building to the east side. Phase 1 work included relocation of a fire hydrant, pouring of new asphalt and installation of a guardrail along the cryo transfer lines. On the west side, the storm drainage utilities have been installed to facilitate the new addition’s footprint. The contractor is installing auger cast piles adjacent to the existing CHL building to provide shoring for the existing building’s foundation. CEBAF Boulevard is closed adjacent to the new building addition and traffic is being detoured to the ring road.

The Hall D construction contractor has completed its Environmental Protection and Safety Plans. It is anticipated that tree clearing will begin in the next two weeks. Personnel are reminded that the walking trail in the Hall D construction area is closed; posted signs indicate the closed area.


Commissioning for the next two polarized 3He experiments, E05-015, a Measurement of the Quasi-elastic Single Spin Asymmetry and E08-005, Measuring the Transverse Asymmetry in the 3He(e,e'n) Reaction, is going very smoothly. Production running is expected to start on Wednesday after changing the beam energy to three-pass.


The accelerator was successfully set up with the energy at 5.968 GeV. The electron gun high voltage was changed back from -85kV to -100kV. Hall A started to take continuous wave beam on Friday, April 25. Hall B is not ready to take beam yet. Hall C is not scheduled to take beam during this spring run, since it is installing its next experiment. While delivering beam, Operations personnel are also executing the radiofrequency cavity quality factor measurement test plan parasitically.

Free-Electron Laser (FEL)

FEL staffers have updated several of the control systems to new servers. Work is proceeding on the piping required for re-establishing cooling water to the facility by May 18.

JLab's Safety Numbers

114 Days since Last Recordable Accident (JLab record: 331)
231 Days since Last Lost Workday Accident (JLab record: 676)

JLab Calendar of Events

May 1: Adopt-A-Spot Litter Pickup
May 2-5: APS April Meeting in Denver
May 20: JLab Annual Run-A-Round
May 25: Memorial Day holiday, lab closed
May 27: Safety Glasses Vendor onsite
May 28: Safety Shoe Vender onsite
June 1-19: HUGS 2009
June 2-4: 53nd Annual Materials Management Workshop
June 8-10: Users Group Workshop and Annual Meeting




Environment, Safety, Health & Quality

The lab trend analysis recently presented to the Director's Safety Council showed two notable patterns: a 70 percent increase in reporting of medical events as pertaining to mishaps or incidents from October 1, 2008 - March 31, 2009 (vs. April 1 - Sept 30, 2008) and a work-force shift from Health, Safety and Security audit prep and recovery back to more field-work-oriented items.

Over the past calender year, 14 of 19 medical events occurred or were reported in the first and second quarters of '09. The site feedback is that the emphasis on reporting and prevention of recurrence is the main driver. The main difference in the time periods was sitewide communication; specifically

  • a September 26, 2008 Montage article;
  • a Workers Safety Committee endorsement letter;
  • the October 1, 2008 and February 11, 2009 Weekly Briefs ESH&Q entries;
  • a February '09 On-Target article; and
  • information announced at various individual department meetings.

Regarding the work force shift back to more field-work-oriented items, this was reflected in data from the ESH&Q Safety Observations, the Corrective Actions Tracking System and from Facilities Management and Logistics. The main finding category for the third and fourth quarters of '08 was procedures. This was consistent in ESH&Q Safety Observations and the CATS. Over the first and second quarters of '09, this category has decreased significantly, replaced by these categories: personnel, personal protective equipment, positions and tools.

Computing and Networking Infrastructure

Computer User Audit
The semi-annual computer user audit will start on May 4. All supervisors and sponsors of JLab accounts will need to affirm the need for those people you supervise or sponsor to continue to have computer user accounts at JLab. More information will be sent as the time approaches.


Healthy Perks for Moms Who Work
JLab now offers a designated Mothers Room, located in CEBAF Center, Room F333. New mothers who are employees or users that are interested in gaining more information should contact Treva Ferguson at x7291 or Jodi Patient at x7100.

Volunteers Needed for Earth Day/Adopt-A-Spot Litter Pick up on May 1
Volunteers are needed to help with an Earth Day/Adopt-A-Spot litter pick up from 11:30 a.m. to 12:30 p.m. on Friday, May 1. Everyone at JLab is invited to take part in this community service project. Sign up on the webpage in advance, so adequate supplies can be provided. Meet in the CEBAF Center lobby at 11:15 a.m. for a short safety briefing and to pick up gear. Litter pickup will cover the sidewalk and grass areas paralleling Jefferson Avenue up to Oyster Point Road and areas across the JLab campus. Wear clothes comfortable to move in, long sleeves, long pants, sturdy shoes and gloves. If you have questions, contact Deb Magaldi.

2009 Jefferson Activities Group Run-A-Round Set for May 20
Dust off those running shoes! The 24th annual Jefferson Activities Group Run-A-Round will be held Wednesday, May 20, from 3-6 p.m. Jefferson Lab staff, users, full-time contractors and immediate family members are invited to participate. Staff and users that participate can receive a free 2009 JLab T-shirt by turning in their Run-A-Round race bibs at the T-shirt distribution tent. You can find more information and register for the Run-A-Round online. Volunteer sign up is also available via the JAG webpage.


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