Adds a use case for chemical plant nuclear integration, based off wor…

…k from the DOW CRADA. (#29)

* Addition of chemical plant use case, based off DOW CRADA work.

* Updated README

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Co-authored-by: Williams <[email protected]>

use_cases/ChemicalPlant/README.txt

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+Cases for DOW CRADA   PI: Daniel Mikkelson
+Sponsor:  Gateway for Accelerated Innovation in Nuclear 
+    under the U.S. DOE Office of Nuclear Energy (DOE-NE)
+
+Report: INL/RPT-24-78505 
+
+    Idaho National Laboratory: Daniel Mikkelson, Vaclav Novotny, 
+    Logan Williams, Junyung Kim, Byung-Hee Choi, Nipun Popli, 
+    Sarah Creasman, Iza Lantgios, Rami Saeed, Aiden Rigby, Paul Talbot, 
+    Frederick Joseck, Aaron Epiney;
+
+    DOW Chemical: Michael Curtis, Gretchen Baier, Scott Bury
+
+Code Executor: Logan Williams [email protected]
+
+data used to train ARMA roms are in the data folder
+raven input files to train the ARMA roms are in the train folder
+HERON inputs files for this use case are in the run folder
+
+HERON input files are modified versions of those used in the DOW CRADA 
+report.  The large plant has two input files.  Both can be used to 
+select the appropriate reactor technology for the plant integration.  
+One is an optimization case with a continuous reactor capacity, the other 
+is a sweep of fixed reactor capacities. The small plant also has two 
+HERON input files, a optimization and sweep.  In which the reactor and 
+thermal energy storage capacities are being evaluated.
+