239 N w Warren, when we used to sit there and hang on to our hats to keep them from going away from the pressure. wo onraw coolers, as we originally designed them, Fr wry days of planning at Hanford the cooling ponds were--thermal You remember, Dr. But these Steaming vats had tremendous algae growths around the edge, and they still do. They in turn absorbed--and there was very serious consideration miven at that time of "we'll Simply collect these plant. growths and put them som place because they blot up the radiation very nicely." 10 EISENBUD: Lauren, iron-63 is an interesting nucleide, e iL I wonder have you looked for Lron-55 in the fish over the 12 atoll? DONALDSON: Yes. } 18 EISENBUD: Have you found evidence of concentration? 15 DONALDSON: 16 EISENBUD: 17 DONALDSON: 18 DUNHAM: Yes, In fact, it's the No. 1. I would think so, yes. Yes, My recollection from a visit to Bermuda 19 a few years ago is that one of the marine scientists there 20 said that iron availability in the waters around there was 21 the limiting factor in perhaps the whole food chain inasmuch 22 as one the key algae couldn't go farther than the amount of 23 iron available. 24 25 AYRES: You m@an phosphorus was not the limiting factor? 26 DUNHAM: 27 EISENBUD: Iron, We found, in studies of our own staff in 28 the laboratory, that some of our ladies who eat tuna fish a 29 few times a week have blood levels of iron-55 that are about 30 ten times higher than the rest of the staff, 31 look at the Pacific tuna, which I think was done independently 32 by the Hanford people, and they came to the same conclusion, 33 that it was Lron-55 from the fallout, This led us to Stafford Warren DOE/UCLA 20