The BEAVRS benchmark (Benchmark for Evaluation And Validation of Reactor Simulations) represents a 4-loop Westinghouse plant with as much detail available in the open literature.  Core loadings and detector readings were provided by plant operators for the first two cycles of operation with all necessary details (i.e. as-fabricated fuel assembly loadings, burnable absorber pin layouts, operational histories and control rod positions, boron concentration).  The current release is version 2.0.1 and detector data is provided here.