def getRunString(self):
        runString ='c ------------------------------ Run Info ---------------------------------\n'
        runString +='nps 1E6                                                                   \n'
        runString +='IMP:N      1 {0:d}R 0           $ Particle Importances within cells       \n'
        runString +='c -------------- Output --------------------------------------------------\n'
        runString +='PRDMP j j 1      $ Write a MCTAL File                                     \n'
        runString +='PRINT 40                                                                  \n'
        runString +='c ------------------------------ Physics ---------------------------------\n'
        runString +='MODE N                                                                    \n'
        runString +='PHYS:N 100 4j -1 2                                                        \n'
        runString +='CUT:N  2j 0 0                                                             \n'
        return runString