Search Options | ||||
Index | Site Map | FAQ | Facility Info | Reading Rm | New | Help | Glossary | Contact Us |
Integrated Chemical Effects Test Project: Test #4 Data Report (NUREG/CR-6914)On this page: Download complete document The following links on this page are to documents in Adobe Portable Document Format (PDF). See our Plugins, Viewers, and Other Tools page for more information. For successful viewing of PDF documents on our site please be sure to use the latest version of Adobe.
Publication InformationManuscript Completed: August 2006 Principal Investigator: J. Dallman Prepared by D. Chen, K. Howe L. Archuleta, F. Sciacca B.P. Jain, NRC Project Manager AbstractA 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 15.41 kg of boric acid, 8.47 kg of sodium hydroxide, 0.663 g of lithium hydroxide, and 212 mL of hydrochloric acid. An additional amount of sodium hydroxide (614 g) was added with the spray beginning at time zero and lasting until 30 minutes 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 pH varied from 9.5 to 9.8 over the first two days, rose to 9.9 on Day 8, and then stayed between 9.7 and 9.9 for the remainder of the test. The test solution turbidity decreased to less than 3 nephelometric turbidity units (NTU) after 24 hours. The turbidity continued to decrease and averaged 0.5 NTU over the last three weeks of the test. Observations of the test solution indicated that no chemical byproducts were visible in the water and no precipitation occurred as samples cooled from test temperature to room temperature. The appearance of the submerged metallic coupons was largely unchanged throughout the test. Post-test examinations showed very little weight changes and only minimal visible deposits on some coupons. The unsubmerged coupons exhibited some streaking, but little or no weight changes. The bottom of the tank was filled with reddish-brown sediment, but no gel-like deposits were present. The test solution remained clearly Newtonian for the entire test. Aluminum was detectable in the solution for only the first 24 hours. |
Privacy Policy |
Site Disclaimer |