The rights and remedies granted in this article shall exclude all other rights and remedies of an employee, his personal representative, parent, surviving spouse, dependents, or next of kin, at common law, by statute, contract, or otherwise on account of occupational exposure to radiation and on account of any injury, disability, loss of service, or death resulting from occupational exposure to radiation. Except as provided in this article, no employer included within the terms of this chapter and no officer, director, agent, servant, or employee of such employer shall be held civilly liable for the occupational exposure to radiation or for injury, disability, loss of service, or death of any employee due to occupational exposure to radiation while engaged in the service or business of the employer, the cause of which occupational exposure to radiation originates in the employment, but nothing in this section shall be construed to relieve any person from criminal prosecution for failure or neglect to perform any duty imposed by law; provided, however, that nothing in this article shall be interpreted so as to deprive an employee or, in case of death, his dependents of any rights or remedies he may have under Articles 2 and 3 of this chapter. The immunity from civil liability shall extend to any workmen's compensation insurance carrier of such employer and to any officer, director, agent, servant, or employee of such carrier, and such immunity shall further extend to any labor union, or any official or representative thereof, making a safety inspection for the benefit of the employer or its employees.