The original research building, completed in July 1969 at the southeastern portion of the site on which the main building of the School of Veterinary Medicine stands, was reconstructed to the east of S building as a new radiation and radioisotope experiment building in April 1999. (Site area: approx. 700 m2; radiation control area: approx. 350 m2) Major radioisotope (RI) measurement instruments equipped in this facility include a liquid scintillation counter, a Geiger counter, a bio-imaging analyzer, an auto-well gamma counter and an X-ray generator, as well as radiation protection survey meters and personal monitoring dosimeters. Major usable unsealed radionuclides are 3H, 14C, 32P, 45Ca, 36Cl, 125I, 35S, 59Fe, 55Fe, 42K, 51Cr. The new building is equipped with new RI control, drainage and disposal systems, as well as with various laboratories and RI storage and disposal facilities. These comply with the latest Laws Concerning the Prevention from Radiation Hazards due to Radioisotopes and Others. This facility is widely used to conduct experiments using radiation and RI in the School and the Graduate School of Veterinary Medicine.


Use permission number: 1581

Radiation protection supervisor: Osamu Inanami


Notes for the Use of Radioisotopes

Notes for the use of radioisotopes outside the radiation experiment facility:

  1. Users must register themselves as full-time users outside the radiation experiment facility (hereafter referred as “the facility”) and must annually receive annual education and training.
  2. When using radioisotopes outside the facility, users must follow the instructions of the radiation protection supervisor or a person responsible for handling of radioisotopes.
  3. When using the identical nuclides in multiple monitoring areas, users must make sure that the sum of the usage quantity ratio and the lower limit amount ratio of each nuclide does not exceed 1.
  4. The radioisotopes stated above can be used only in in-vitro experiments at the P3 Laboratory; they shall not be administered to animals.
  5. Nuclide reception and transport is allowed only between facilities for handling radioisotopes at the Faculty of Veterinary Medicine, and nuclide reception and transport must not be conducted to and from the radiation control areas of other facilities/departments. In doing this operation, users are required to confirm and register reception and transport of radioisotopes at the radiation controlled area office.
  6. The usage amount of radioisotopes for experiments must be minimized.
  7. Users can purchase radioisotopes only after approval of the radiation protection supervisor. When using radioisotopes, users have to complete regular procedures, such as recording storage, usage and disposal of isotopes in the facility
  8. Unsealed radioisotopes must be returned to the storage room in the facility. Isotopes shall not be stored outside the facility.


Usage of unsealed radioisotopes

  • When radioisotopes listed in the usage amount of unsealed radioisotopes are used for animal experiments (administration of radioisotopes to animals) at Site 2, the usage amount shall be no more than 5% of 3-month usage amount or the maximum usage amount per day listed at Site 2.
  • The radioisotopes listed in the storage capacity of unsealed radioisotopes must be stored in the 2-cm-thick lead box installed in the storage room.
  • Regarding the radioisotopes listed in the usage amount of unsealed radioisotopes, animals used for animal experiments (administration of radioisotopes to animals) at Site 2 and their feces must be retained after being dried.


Use of unsealed radioisotopes in laboratories outside of the controlled area

Location of useAim of useUsageNuclideFormDaily use limit

Faculty of Veterinary Medicine, Hokkaido University


P3 laboratory, Lab of Public Health

P3 laboratory, Lab of Microbiology

P3 common laboratory, International Institute for Zoonosis Control

P2 common laboratory, International Institute for Zoonosis Control

RI laboratory, Institute of Low Temperature Science

Research and education using animal/plant cells in veterinary medicine

Radioisotopes must be used solely for in vitro tracer experiments in laboratories.

Administration of radioisotopes are not allowed in the laboratories of Public Health, Microbiology, and International Institute for Zoonosis Control





Liquid or Solid

Liquid or Solid

Liquid or Solid

Liquid or Solid

100 kBq

100 MBq

10 MBq

37 MBq


  • Unused radioisotopes must be returned to the radiation facility.
  • Total amount of radioisotopes used in the locations above must be within the daily use limit.
  • When multiple nuclides are used, the ratio between the used quantity and the lower limit quantity in each nuclide must be below 1.


Storage capacity and usage limits of unsealed radioisotopes(PDF)


Equipment available for use(PDF)


Application Forms

Application forms to be downloaded:


Application for the use of the radiation control areas

Those who use the facility are required to submit this application.

Excel PDF


Application for the use of the monitoring areas (those outside the facility)

Those who use the monitoring areas have to submit this application, as well as the one for the use of control areas.

Word PDF


Application for purchasing RI from the Japan Radioisotope Association

Those who wish to purchase RI are required to fax this application to the Japan Radioisotope Association after receiving permission of the supervisor.

Word PDF


Application for transfer of RI

Those who intend to transfer RI from the facility to other radiation control areas must submit this application to the supervisor.

Word PDF


Transportation record

Those who transport RI inside Hokkaido University need to complete this form.

Word PDF


Website of the Japan Radioisotope Association regarding disposal treatment

Handbook of Waste Disposal



Click on the above link to download the necessary application forms. After completing the forms, submit them to Dr. Yamamori (Int.: 5236) in the Laboratory of Radiation Biology.



RI Experiment Building, Faculty of Veterinary Medicine, Hokkaido University

■Address: Kita 18, Nishi 9, Kita-ku, Sapporo

■Tel: 011-706-5235, 5236

■FAX: 011-706-7373

■Radiation protection supervisor: Osamu Inanami(inanami[at]

■Facility manager: Tohru Yamamori(yamamorit[at]


Hokkaido University International Institute for Zoonosis Control

■Address: Kita 20, Nishi 10, Kitaku, Sapporo

■Representative: Hirofumi Sawa ((h-sawa[at]


Institute of Low Temperature Science, Hokkaido University

■Address: Kita 19, Nishi 8, Kita-ku, Sapporo

■Representative: Hisaya Kojima (kojima[at]