Nothing in sections 83-4,109 to 83-4,123 shall be construed as to restrict or impair an inmate’s free access to the courts and necessary legal assistance in any cause of action arising under such sections or to judicial review for disciplinary cases which involve the imposition of disciplinary isolation or the loss of good-time credit in accordance with the Administrative Procedure Act. Such judicial review may only be invoked after completion of any review of the hearing prescribed by section 83-4,122 by the department.