Neb. Rev. Stat. § 48-148: Neb. Rev. Stat. § 48-148

If any employee, or his or her dependents in case of death, of any employer subject to the Nebraska Workers' Compensation Act files any claim with, or accepts any payment from such employer, or from any insurance company carrying such risk, on account of personal injury, or makes any agreement, or submits any question to the Nebraska Workers' Compensation Court under such act, such action shall constitute a release to such employer of all claims or demands at law, if any, arising from such injury.