Signing of the contract for the acquisition of Nuclear Research Reactor IEA-R1 for the Atomic Energy Commission of the CNPq, in 1955. Prof. Dr. Marcello Damy de Souza Santos, founder of Ipen, is the first, from left to right, at the head of the table.

Concrete side of one of the walls of the building of the IEA-R1. On the left, the Babcock & Wilcox supervisor engineer and right, Dr. Eva Wanda Cibulska reactor physics group of the IEA, today Ipen.

View of bottom slab frame and carbon steel plates used to prevent leakage through the walls of the reactor pool. These plates were later concretadas inside the walls (1957).

In the lobby that was to house the pool of IEA-R1, left to right, Mr. Claude Cardwell, Prof. Dr. Fausto Valter de Lima and Dr. Eva Wanda Cibulska, in 1957.

In the foreground, the surface of the pool where the IEA-R1 nuclear reactor. The left Prof. Dr. Fausto Walter de Lima and Dr. Paulo Saraiva de Toledo.

The solid façade of the building that houses the reactor IEA-R1, in 1957, the year he began his operation.

Lounge where to be experiments in Nuclear Physics in 1957. Left Dr. Fausto Walter de Lima and the right engineer supervisor of American firm Babcock & Wilcox. In the background, access doors to the tubes that allow neutron collimators to conduct experiments in Nuclear Physics.

First calibration of the monitors of the area, on the first floor of the reactor building IEA-R1. On the left, Dr. Wilma Sonia Hehl and Mr. Carlos Rodrigues Pereira.

President Juscelino Kubitschek inaugurates the IEA-R1 Nuclear reactor, on 25 January 1958, under the gaze of the then State Governor, Jânio Quadros and the Director of the Institute, Dr. Marcello Damy de Souza Santos.

In 1958 operation team, headed by Dr. Paulo Saraiva de Toledo, in the control room of the IEA-R1. One year and 16 days after the beginning of the works, the IEA-R1 reactor came into operation.

Prof. Dr. Fausto Walter de Lima and Dr. Alcídio Abrão, in 1960, when it started the process of purification of uranium, one of the stages of the nuclear fuel cycle.

Ion-exchange columns, in the foreground and feed tanks, in the background, in the early 60, in one of the stages of the nuclear fuel cycle, in order to purify uranium.

Receipt of purified solutions after the passage by the ionic columns at the beginning of the years 60, in one of the stages of the nuclear fuel cycle.

In the early 60, in one of the stages of the nuclear fuel cycle, the burning of sodium Diuranato. The operator is properly protected from ingestion of material uranífero and the location is isolated from the rest of the plant.

Dr. Alcídio Abrão, Center, at the beginning of the construction of the second building of chemical engineering in 1972.

The Ipen started production of radiopharmaceuticals in Brazil in 1959. In the photo, cells for processing of radiopharmaceuticals in the early 70.

Inauguration of the Radiofarmácia Center of Ipen, in 1976.

The then-Governor award Natel (left) visits the processing facilities of radiopharmaceuticals at the inauguration of the buildings of the Radiofarmácia Center, in 1976. In the foreground on the right: Romulus Ribeiro Pieroni, Superintendent of Ipen and constancy Pagano g. da Silva, responsible for the area.

Inauguration of the Radiofarmácia Center of Ipen in 1976. From left to right: Hervásio G. de Carvalho, President of the CNEN; Laudo Natel, Governor of São Paulo; Constância P. G. da Silva, of Ipen and Hernani A. L. de Amorim.

Exterior view of one of the buildings of the Radiofarmácia Center of Ipen, during inauguration in 1976.

Constância G. P. da Silva (right) Thallium sample delivery, radiopharmacology for medical use, to President João Baptista Figueiredo, during visit to Ipen on 10 October 1984. Also present the Governor of São Paulo, André Franco Montoro (Centre) and the President of the CNEN, Rex Nazaré Alves (left).