Question: What town was evacuated in 1940-1941 and take over by the U.S. Government to create Weldon Spring Ordnance Works, a 17323 acre facility?
Sentence (from "P-9 Project"): Three nuclear reactors were built using the heavy water produced by the P-9 Project: Chicago Pile 3 at Argonne, and ZEEP and NRX at the Chalk River Laboratories in Canada.
Relevant evidence: No