How to Register as a Radiation Worker for Collaborators(Other users except for PF, PF-AR, and slow positron users)<Note: "PF-AR Test Beam Line" users apply to this procedure.>Contact Information
Radiation Reception

Radiation Reception Building
TEL: 3500 (ex.), 029-864-5496, E-mail: kek3500@ml.post.kek.jp
Business hours: 8:30-12:00 and 13:00-18:30 on weekdays<Only inquiries about women's exposure control>
Radiation Control Office
Radiation Control Building, 1F
TEL: 5495 (ex.), 029-864-5495, E-mail: rad-office@ml.post.kek.jp
Business hours: 9:00-12:00 and 13:00-16:00 on weekdays

Procedure Flow
1. Paper preparation for registration<Required paper> Form No. 10
Create Form No.10 using the Users Support System (https://krs.kek.jp/uskek/ui/UI_00000E). The
seals of the representative and radiation safety supervisor of the applicant's institute are required.
If the applicant belongs to a foreign institute, the sign of the radiation safety supervisor is not
required.
<Additional paper 1: In case of a female applicant> Form No. 11
Since the exposure control criteria change for "pregnant women" or "infertile women or women
who do not intend to become pregnant," the applicant should complete Form No. 11 if necessary.
<Additional paper 2: In case of exposure the year> Copy of exposure record
Prepare a copy of the applicant's exposure record if the applicant is a radiation worker taking morethan 5 mSv for males and 1 mSv for females in the current fiscal year period.
<Additional paper 3: In case of exposure the previous year> Copy of medical examination report
Prepare a copy of the applicant's medical examination report for radiation workers if the applicant
is a radiation worker who has taken more than 1 mSv in the previous fiscal year period.
2. Submission of the registration papers to the Radiation Control Office
Mailing address: Radiation Control Office, High Energy Accelerator Research Organization (KEK),
1-1 Oho, Tsukuba, Ibaraki 305-0801, JAPANMust arrive at Radiation Control Office at least two business days before the visit. Sending methods
with tracking services are recommended.
3. Confirmation of the approval status for the registration papers on the User Support System
When the registration papers are received and accepted by Radiation Control Office, the registration
status changes to "Completed." It takes 1 to 2 business days after the registration papers are received,
even if the papers are complete. If the registration status is not changed to "Completed," please contact
the Radiation Reception. If the applicant comes to KEK without completing the registration, it may
cause trouble.
4. Radiation safety training at the first visit of the Japanese fiscal year.
Location: Radiation Reception
Video training: 30 minutes (90 minutes for persons affiliated with foreign institutions)
Last entry time: 11:30 in the morning, 18:00 in the afternoon*Last entry time for persons affiliated with foreign institutions: 17:00
5. Issuance of a personal dosimeter and radiation work start
Radiation Reception will designate a pickup place for the personal dosimeter.

Annual Renewal
The registration of the radiation worker expires at the end of the Japanese fiscal year. Renewal procedures
are required annually. After April 1, no radiation work will be allowed for persons whose registration hasexpired.
June 26, 2023