Menlo Park: Fire temporarily shuts down SLAC linear accelerator

The linear accelerator at SLAC National Accelerator Laboratory in Menlo Park has been shut down after a June 25 fire that damaged an electrical cabinet and its interior equipment that serve the accelerator.

The shut-down has temporarily shut off the source of high-intensity X-rays for the Linac Coherent Light Source (LCLS) and FACET, the Facility for Advanced Accelerator Experimental Tests.

Both were idle on Friday, June 27, SLAC spokesman Andrew Gordon told the Almanac.

It was still uncertain when the accelerator might restart, Mr. Gordon said.

The fire

On Wednesday night, a 911 call came in at about 9:45 p.m. When firefighters arrived on the scene, all they could see was smoke, Division Chief Frank Fraone of the Menlo Park Fire Protection District told the Almanac.

Thick smoke hid the section of the two-mile long building that passes under Interstate 280.

The two-alarm fire was quickly contained. Had it not been, firefighters were prepared to request that the California Highway Patrol close the freeway. "That was our next call," Mr. Fraone said.

The fire was contained by 10:30 p.m. and there were no injuries, Fire Chief Harold Schapelhouman said.

The fire damaged supporting equipment, but not the accelerator itself, Mr. Fraone said.

In fighting the fire, firefighters worked with accelerator staff to determine the source of the smoke, de-energize the accelerator and shut down equipment as needed to allow safe access. In addition, they closed smoke-control doors to isolate the affected area, Chief Schapelhouman said.

The smoke diminished after accelerator staff shut off the electricity to the switch box believed to be at the center of the fire, Mr. Fraone said. The switch box, which measures 8 feet by 10 feet by 3 feet, carried "extremely high voltage" and had high-technology equipment inside it, he said.

Menlo Park firefighters visit SLAC frequently and are "very, very familiar" with the entire accelerator facility, Mr. Fraone said.

Firefighters used seven large mobile carbon dioxide extinguishing carts at the site to suppress the fire, he said. Once the voltage was off, the firefighters extinguished burning insulation and plastic, Mr. Fraone said.

The cause of the fire is under investigation. The second alarm was called as a precaution, Chief Schapelhouman said. "Our crews have been well trained in the protocols and techniques needed to suppress and control fires at this facility."

SLAC representatives meet monthly with the district's prevention bureau and quarterly with Chief Schapelhouman to discuss all incidents at the site.

Stanford University operates the SLAC National Accelerator Laboratory, which opened in 1962, and is one of 10 laboratories overseen by the U.S. Department of Energy Office of Science.

Bay City News Service contributed to this report.


Like this comment
Posted by Erik
a resident of another community
on Jun 28, 2014 at 9:14 am

It's an electron accelerator. Not proton.

Don't miss out on the discussion!
Sign up to be notified of new comments on this topic.


Post a comment

Posting an item on Town Square is simple and requires no registration. Just complete this form and hit "submit" and your topic will appear online. Please be respectful and truthful in your postings so Town Square will continue to be a thoughtful gathering place for sharing community information and opinion. All postings are subject to our TERMS OF USE, and may be deleted if deemed inappropriate by our staff.

We prefer that you use your real name, but you may use any "member" name you wish.

Name: *

Select your neighborhood or school community: * Not sure?

Comment: *

Verification code: *
Enter the verification code exactly as shown, using capital and lowercase letters, in the multi-colored box.

*Required Fields

The Saddle Room – A True Friend of Kids
By Laura Stec | 2 comments | 2,060 views

Palo Alto: Pastis owner to open second French restaurant
By Elena Kadvany | 0 comments | 1,213 views

The Four E's--Pope Francis and the Middle Class
By Steve Levy | 3 comments | 947 views

My College Mindset is Intrinsically Motivated
By John Raftrey and Lori McCormick | 1 comment | 817 views

Marriage Interview 9: Make a Date to Have Sex Once or Twice a Week and . . .
By Chandrama Anderson | 6 comments | 692 views