True or False Test have been conducted to mine uranium from seawater. Just not sure.

Pat==
I checked at www.google.com by typing in "uranium sea water" without the quotation marks and I received a lot of "hits" but almost all that I saw (all but one) were studies to extract U from sea water, studies on the amount of U in sea water, studies on how much U might be needed from sea water, and a lot of hypotheses on extraction techniques. I saw very little from government sources or from review journals. However, I did find one site, which I copied below, in which the author (an individual) reported that Japan had actually conducted a test and formed some "yellow cake". I didn't read the entire article but I didn't see any references. Perhaps some are there. I don't know how reliable the information is but this should give you a starting point.
http://peakoildebunked.blogspot.com/2006/01/207-uranium-from-seawater-part-1.html

Based on the information provided, it seems that there have been studies and research conducted on extracting uranium from seawater, but it is unclear if any actual tests have been conducted successfully. The source mentioned is a blog post that mentions a test conducted in Japan, but it is important to note that the reliability of the information from this source is uncertain.

To get a more accurate and reliable answer, you can try conducting a more comprehensive search using trusted sources such as scientific journals, government reports, or reputable news outlets. Additionally, you can consult experts in the field of nuclear energy or uranium mining to get more information on any tests conducted for mining uranium from seawater.