United States Nuclear Regulatory Commission - Protecting People and the Environment

Integrated Chemical Effects Test Project: Test #3 Data Report (NUREG/CR-6914, Volume 4)

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Publication Information

Manuscript Completed: August 2006
Date Published:
December 2006

Principal Investigator: J. Dallman

Prepared by:
J. Dallman, B. Letellier, J. Garcia, J. Madrid, W. Roesch
Los Alamos National Laboratory
Los Alamos, NM 87545

D. Chen, K. Howe
University of New Mexico
Department of Civil Engineering
Albuquerque, NM 87110

L. Archuleta, F. Sciacca
OMICRON Safety and Risk Technologies, Inc.
2500 Louisiana Blvd. NE, Suite 410
Albuquerque, NM 87110

B.P. Jain, NRC Project Manager

Prepared for:
Division of Fuel, Engineering and Radiological Research
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

NRC Job Code Y6999

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Abstract

A 30-day test was conducted in the Integrated Chemical Effects Test (ICET) project test apparatus. The test simulated the chemical environment present inside a pressurized water reactor containment water pool after a loss-of-coolant-accident. The initial chemical environment contained 14.54 kg of boric acid and 0.663 g of lithium hydroxide. Trisodium phosphate (3.786 kg), hydrochloric acid (211 mL), and additional boric acid (600 g) were added beginning at 30 minutes and lasting until 4 hours into the test. The test was conducted for 30 days at a constant temperature of 60°C (140°F). The materials tested within this environment included representative amounts of submerged and unsubmerged aluminum, copper, concrete, zinc, carbon steel, and insulation samples (80% calcium silicate and 20% fiberglass). Representative amounts of concrete dust and latent debris were also added to the test solution. Water was circulated through the bottom portion of the test chamber during the entire test to achieve representative flow rates over the submerged specimens. The test solution reached a pH of 7.9 by Day 3, and the test solution turbidity decreased to less than 1 NTU after 24 hours. During the introduction of trisodium phosphate at the beginning of the test, a white flocculence was observed through the submerged observation window. This flocculence was accompanied by a rise in turbidity and total suspended solids (TSS). Turbidity and TSS dropped after chemical addition was complete, and the white flocculence was no longer visible in the water after the first day. Observations of the test solution indicated similar behavior of the solution at both room temperature and test temperature. After the initial flocculence had settled out of solution, no chemical byproducts were visible in the water and no precipitation occurred as samples cooled from test temperature to room temperature. Large amounts of white deposits of varying size were observed on the submerged galvanized steel, aluminum, copper, and inorganic zinc coated steel coupons. The bottom of the tank was filled with sediment that had a pinkishwhite deposit on top. The test solution remained clearly Newtonian for the entire test. Aluminum was detectable in the solution, but only in trace amounts.

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