To amend title 38, United States Code, with respect to benefits for individuals who may have been exposed to ionizing radiation during military service, and for other purposes.

Extends the presumption of service-connection, for purposes of eligibility for veterans' benefits and medical care in the case of exposure to ionizing radiation, to include reserve members exposed to such radiation during active duty training and inactive duty training.

Expands the list of diseases presumed to be service-connected in the case of exposure to ionizing radiation to include cancer of the salivary tract, cancer of the urinary tract, cancer of the colon, and bronchogenic carcinoma. Terminates the current presumptive period (the maximum period allowed before manifestation of the illness or disease occurs in order to be presumed to be service-connected and, therefore, covered as a veterans' benefit) of 40 years after participation in the radiation-related activity (30 years in the case of leukemia).

Amends the Veterans' Dioxin and Radiation Exposure Compensation Standards Act to direct the Secretary of Veterans Affairs to establish guidelines and standards for the resolution of claims for benefits where a claim is based on a veteran's exposure to ionizing radiation.

Directs the Secretary, in consultation with the Secretary of Defense, to identify not less than three activities in which individuals serving on active duty or active or inactive duty training have participated and which likely would have exposed such individuals to levels of ionizing radiation above background levels. Requires the Secretary to identify at least three additional activities no later than October 1 of each of the years 1992 through 1994. Requires the Secretary, immediately after identifying such an activity, to direct the Veterans' Advisory Committee on Environmental Hazards to evaluate and make a finding as to whether participation in such activity resulted in exposure to ionizing radiation comparable to that of veterans who participated in a radiation-risk activity as defined under current veterans' benefits provisions. Requires reports from the Committee and the Secretary concerning such activities. Directs the Secretary to list each ionizing radiation exposure identified, unless the Secretary determines that the activity did not result in an opportunity for exposure to ionizing radiation comparable to that of veterans who participated in previously-identified radiation-risk activities.