During the fourth and fifth days after admission, Priest was in great pain from injuries to the mucous membranes of the mouth, esophagus, and stomach. The mucous membranes were coming off in layers. Priest lost both sleep and appetite. Starting on the sixth day his right shin, on which the skin was disintegrating, began to swell and feel as if it was bursting; it then became rigid and painful.

On the seventh day, on account of a profound agranulocytosis — that is, a drop in the number of granular forms of leucocytes, responsible for immunity — I ordered an administration of 750 milliliters of bone marrow with blood.

Priest was then moved to a room sterilized with ultraviolet light. A period of intestinal syndrome began: bowel movements occurred between twenty-five and thirty times every twenty-four hours, containing blood and mucus; there was tenesmus, rumbling, and movement of fluids in the region of the caecum.

Owing to the severe lesions in the mouth and esophagus, Priest did not eat for several days. We provided nutrient fluids intravenously. In the meantime, soft blisters appeared on the perineum and buttocks, and the right shin was bluish purple, swollen, shiny, and smooth to the touch.

On the fourteenth day Colonel Priest began to lose his hair, in a curious manner: all the hair on the back of his head and body fell out. He grew weaker, and his lapses into unconsciousness or incoherence grew more prolonged.

On Friday January 2, the thirtieth day after the accident, Priest’s blood pressure suddenly dropped.

Fifty-seven hours later, Colonel Priest died; I recorded the immediate cause of death as acute myocardial dystrophy.

Under the microscope, it was quite impossible to see Priest’s heart tissue. The cell nuclei were a mass of torn fibers. It is accurate to say that Priest died directly from the radiation itself, and not from secondary biological changes. Gentlemen, it is impossible to save such patients, once the heart tissue has been destroyed.

Of the three members of Apollo-N’s crew, only Colonel Priest was found to be alive when the capsule was recovered after reentry. The radiation from the ruptured NERVA core had hit Colonel Priest from behind, doing most harm to his back, his calves, his perineum, and buttocks.

His mother, wife, and son were in attendance at his death.

Source: Report of the Presidential Commission on the Apollo-N Malfunction, Vol. I: Testimony of Dr. I.S. Kirby to the Medical Analysis Panel (extract) (Washington, DC: Government Printing Office, 1981)

January 1981

LYNDON B. JOHNSON SPACE CENTER; CLEAR LAKE, HOUSTON

One of the back rooms behind the MOCR had been turned into the primary site for investigating the telemetry data received from Apollo-N in the moments leading up to the accident. The walls were papered with strips displaying the readouts from every sensor they’d had the crew and craft wired up to.