Did Kitty Litter Cause Chemical Reaction That Led to Radiation Leak at WIPP in New Mexico?

The story was on May 13, 2014 on Reuters, before the latest update from the US Department of Energy on May 16, 2014.

It fondly reminded me of TEPCO's use of bath salt (as tracer) and shredded newspaper and baby diaper polymer to plug the leak at the water intake for Reactor 2 back in April 2011.

From Reuters (5/13/2014; emphasis is mine):

Kitty litter eyed as possible culprit in New Mexico radiation leak

Kitty litter used to absorb liquid in radioactive debris may have triggered a chemical reaction that caused a radiation leak at a below-ground U.S. nuclear waste storage site in New Mexico, a state environmental official said on Tuesday.

The waste disposal site, where drums of plutonium-tainted refuse from nuclear weapons factories and laboratories are buried in salt caverns 2,100 feet (640 meters) underground, has been shut down since unsafe radiation levels were first detected there on Feb. 14.

The leak of radiation, a small amount of which escaped to the surface and exposed 21 workers at the Waste Isolation Pilot Plant, ranks as the worst accident at the facility and one of the few blemishes on its safety record since it opened in 1999.

Investigations of the chamber where the leak occurred suggest a chemical reaction may have generated sufficient heat to melt seals on drums and boxes of contaminated sludge from the Los Alamos Nuclear Laboratory, releasing radioisotopes such as plutonium, Energy Department officials have said.

Jim Blankenhorn, deputy manager with the contractor running WIPP, told a public meeting last week that a change in the materials used at Los Alamos to package waste may have triggered a reaction between nitrate salts and organic matter.

“Kitty litter is in the field of theories,” Jill Turner, spokeswoman for the New Mexico Environment Department, said about a possible cause for the accident.

Kitty litter is used as an absorbent for liquid contained in radiological debris destined for WIPP, which does not accept fluid waste, Turner said.

Los Alamos, a leading U.S. nuclear weapons lab, and the WIPP contractor, Nuclear Waste Partnership, did not immediately respond to requests for comment on Tuesday.

Dozens of drums of waste from Los Alamos that have been linked to the radiation accident are deposited in two separate waste disposal chambers at WIPP, managers have said.

The plant last week suspended shipments of that waste to a Texas-based commercial storage facility, which had received 25 drums between April 1 and May 1, said WIPP spokesman Brad Bugger.

The plant in the Chihuahuan Desert in southeastern New Mexico provides for permanent disposal of contaminated items like clothing and equipment from U.S. nuclear laboratories and weapons sites.

It is not expected to resume operations for at least 18 months and may take as long as three years to be fully operational, managers have said.

Tweet

US Department of Energy Releases Update on Radiation Leak at Waste Isolation Pilot Plant (WIPP) in New Mexico, Container with Broken Lid Identified

(UPDATE 5/20/2014) Possible culprit: kitty litter. See my new post.

-------------------------------

And it was a container from Los Alamos National Laboratory (LANL).

The first report of radiation leak (plutonium) from the Waste Isolation Pilot Plant (WIPP) that necessitated the evacuation of workers and plant shutdown was in February this year.

From Department of Energy WIPP Update (5/16/2014):

New Information Provided About Possible Contributor to the WIPP Radiological Event

The Department of Energy issued the following statement today regarding new information generated during the May 15 entry into WIPP:

Since the February 14 radiological release, the Department and its Waste Isolation Pilot Plant have been working deliberately to safely determine the cause of the release. The team that entered the underground facility yesterday was able to get additional visual evidence that shows a damaged waste container, identified as one from Los Alamos National Laboratory.

In the new pictures, the LANL container has a cracked lid and shows evidence of heat damage. Workers will continue investigating to determine what caused the container breach and if any other containers were involved or damaged,” said a DOE spokesperson.

Community Meetings Scheduled

May 20 – A WIPP Recovery update will be provided at the Economic Development Corporation of Lea County Annual Meeting. The update, which will be provided by a member of the NWP Communications team, is scheduled for 11:30 a.m. Location: Hobbs Country Club, 5001 W. Carlsbad Highway.

May 22– The City of Carlsbad and DOE will co-host its weekly meeting featuring updates on WIPP recovery activities. The meeting is scheduled today at 5:30 p.m. Location: Carlsbad City Council Chambers, 101 N. Halagueno Street. Live streaming of the weekly meetings can be seen at http://new.livestream.com/rrv/.

"Evidence of Damaged Drum in Panel 7, Room 7" from DOE WIPP "Photo and Video" section (more photos at the link):

"The May 15 entry into Panel 7, Room 7 produced this photo of a waste container (left) with its lid unsealed and apparent heat discoloration."

There is a video of re-entry to WIPP on May 15, 2014.

According to Japan's NHK reporting on the DOE update, it may take at least three years before the facility resumes operation.

Tweet

Possible Leak of Alpha and Beta Radiation Emitters at Transuranic Radioactive Waste Underground Storage Facility in New Mexico, DOE Official Doesn't Quantify the Leak

The facility, Waste Isolation Pilot Plant (WIPP), takes plutonium-contaminated waste from Los Alamos National Laboratory and other federal nuclear projects.

According to wiki,

The Waste Isolation Pilot Plant, or WIPP, is the world's third deep geological repository (after closure of Germany's Repository for radioactive waste Morsleben and the Schacht Asse II Salt Mine) licensed to permanently dispose of transuranic radioactive waste for 10,000 years that is left from the research and production of nuclear weapons.

(FYI, transuranic elements: the chemical elements with atomic numbers greater than 92 (the atomic number of uranium))

From Salon, quoting AP (2/16/2014; emphasis is mine):

Crews monitor NM nuclear repository for radiation

CARLSBAD, N.M. (AP) — Officials checking the presence of airborne radiation at an underground site in southeastern New Mexico where the U.S. government seals away low-grade nuclear waste say surface tests have detected no contamination.

Samples were taken at several sites around the Waste Isolation Pilot Plant after an air monitor found radiation on the underground levels of the facility around 11:30 p.m. Friday, the U.S. Department of Energy said in a news release.

No workers were underground at the time and no injuries or damages have been reported. A fire at the site earlier this month prompted an evacuation.

“Monitors at the WIPP boundary have confirmed there is no danger to human health or the environment,” the department said late Saturday night. “No contamination has been found on any equipment, personnel, or facilities.”

Energy Department spokesman Roger Nelson said that the 139 workers aboveground at the site near Carlsbad were told Saturday to stay where they were as a precaution. None of them tested positive for contamination, and all non-essential personnel were released, Nelson said.

The surface samples show no contamination has been detected, implying the leak was “not significant,” he said.

Nelson says the cause of the leak is not known yet. The devices that continuously monitor the air underground reached a threshold level that automatically switches the ventilation system into a filtered mode. He couldn’t quantify the level it takes to trigger the monitors, but says they’re sensitive. He says the monitors have been triggered in the past by radon fluctuations.

WIPP stores waste that emits alpha and beta radiation, which is in particulate form, so the risk is of inhalation not penetration, he said.

No one has been underground, and Nelson said he didn’t know when that would happen.

“We are going to take measurements and make sure we understand it” before sending in a team, he said.

U.S. Rep. Steve Pearce issued a statement saying, “WIPP has acted quickly and cautiously to ensure the safety of personnel and the local community.”

============================

The incident comes 10 days after an underground truck fire at the plant prompted an evacuation. Six people were treated for smoke inhalation on Feb. 5.

Nelson said the fire was in a different part of the site, about 1,000 feet away, from where the radiation was found.

Asked if the incidents were related, he said, “I just can’t think of a scenario where there would be a relationship.”

WIPP is the nation’s first and only deep geological nuclear waste repository. It takes plutonium-contaminated waste from Los Alamos National Laboratory and other federal nuclear projects.

Tweet