Make sure one-temperature case is handled correctly for temperature range
Make sure one-temperature case is handled correctly for temperature range

shikhar413/openmc,walshjon/openmc,amandalund/openmc,amandalund/openmc,amandalund/openmc,amandalund/openmc,walshjon/openmc,shikhar413/openmc,shikhar413/openmc,walshjon/openmc,walshjon/openmc,shikhar413/openmc