Hi,
You are welcome, it is interesting what you are planning to do, but I have problem understanding the exact application here.
You want to capture the data from a 5MP camera into the FPGA and save it on a Flash EEPROM? I don't know of any Flash that has enough bandwidth for such application.
Also, if you are afraid of SRAM for radiation (are you sure you mean SRAM and not SDRAM?), then you should consider the problem with the FPGA's internal structure as well, most FPGAs today are SRAM based and sensitive to radiation unless you go for some VERY expensive devices that are classified for high radiation applications.
Best regards,
/Farhad