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Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)
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      Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)


      Mission: Destroy Chemical Weapons Stockpile

      Vision: Chemical Weapons Free by 2023

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Plans Made to Resume Operations at Pueblo Pilot Plant

Published: December 30, 2016 | Category: PCAPP News, Technology
After removing its agitator, Pueblo Chemical Agent-Destruction Pilot Plant workers install a blind flange to one of three 30-day Hydrolysate Storage Tanks.

After removing its agitator, Pueblo Chemical Agent-Destruction Pilot Plant workers install a blind flange to one of three 30-day Hydrolysate Storage Tanks.

Repairs are being made after a tank agitator seal leak and damaged liner paused operations at the Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP).

“A failed seal on one of our 30-day Hydrolysate Storage Tanks and the liner in the secondary containment area surrounding our Brine Concentrator Feed Tanks continue to impact the plant’s ability to process mustard agent,” said Greg Mohrman, site project manager, PCAPP.

During the week of Dec. 12, workers performed a test on one tank, which determined the agitators are not needed to maintain consistency in the feed to the Immobilized Cell Bioreactors. Plant staff will process a permit modification with the state of Colorado to allow the agitators to be removed from all three storage tanks, said Rick Holmes, project manager, Bechtel Pueblo Team.

“The tanks will be sealed with blind flanges because the seals and side mounted agitators present a risk of future failure that is not worth taking,” Holmes said. A blind flange is a plate for covering or closing the end of a pipe.

On Dec. 16, work began on the secondary containment area surrounding the Brine Concentrator Feed Tanks. The liner and coating from the floor and part way up the walls will be removed. A replacement material has not yet been determined.

“While I am not sure the exact material we will apply, the current thinking is to find a material that will be adequate to directly apply over the current floor,” Holmes said. “It will take a few months to complete the work in this area to make it ready for long-term operations.”

Holmes said technicians can resume processing munitions when integrity of the storage tanks is confirmed and a plan for the resumption of biotreatment operations is complete, which he forecasts for early January.

“PCAPP will restart operations when the plant is ready to do so safely,” Mohrman said.

More PCAPP Technology Articles

  • Attention to Detail Prevents System Clogs

    Attention to Detail Prevents System Clogs

    Published: March 23, 2021
  • Innovative Solution Reduces Problematic Munitions

    Innovative Solution Reduces Problematic Munitions

    Published: March 4, 2021
  • Pueblo Plant Upgrades Closed-Circuit Camera System

    Pueblo Plant Upgrades Closed-Circuit Camera System

    Published: February 10, 2021
  • Pueblo Chemical Agent-Destruction Pilot Plant Automation Specialist Wendell Savage teaches the Training Facility robot about the new Drained Munition Weight Station. Later, the lessons were applied to the plant’s Munitions Washout System.

    Pueblo Plant Worker Instrumental in Campaign Success

    Published: February 2, 2021
  • Static Detonation Chamber Units Begin Testing

    Static Detonation Chamber Units Begin Testing

    Published: December 22, 2020
  • Workers Reconfigure Equipment for Next Destruction Campaign

    Workers Reconfigure Equipment for Next Destruction Campaign

    Published: November 30, 2020
PCAPP Neutralization

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    September 14, 2017
  • First Off-Site Shipment of Wastewater Successful

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  • Colorado Plant Achieves Munition Processing Milestone

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Related Videos

  • Temporary Off-site Shipment of Hydrolysate from Colorado Plant

    Temporary Off-site Shipment of Hydrolysate from Colorado Plant

    June 29, 2017
  • PCAPP is Committed to Secondary Process

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    January 23, 2017
  • Surrogate Testing Proves Successful at the Pueblo Plant

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    September 23, 2016
  • Fun Video Shows Science Behind Destruction of Chemical Weapons in Colorado

    Fun Video Shows Science Behind Destruction of Chemical Weapons in Colorado

    July 5, 2016
  • Five Steps of Chemical Weapons Destruction at PCAPP

    Five Steps of Chemical Weapons Destruction at PCAPP

    March 31, 2014

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Program Executive Office, Assembled Chemical Weapons Alternatives (PEO ACWA)