Exhaustive list of CMS RP EDMS.

CMS Radiation Protection Experts sharepoint Website - new Website under construction (restricted).

HSE RP sharepoint website for CMS.

HS-RP contact list.

CMS RSO team guidelines on:

• Operational dosimetry, EDMS 1527197
• RP Waste, EDMS 1555847
• Personal dosimetry at CMS, EDMS coming soon
• Dose records on HRT, EDMS coming soon
• TREC at CMS, EDMS 1555334
• RP transport at CMS, EDMS 1556095
• Questions from RSOC to RP
• New rules for the internal transport of radioactive goods at CERN

Radiation Protection guidelines for TS & (E)YETS

Irradiation facilities website

The "radiation protection" training course is mandatory for all people who need a personal dosimeter:

• For accessing the Supervised Radiation Areas, the course on LMS is sufficient (around 30 min. online).
• For accessing the Controled Radiation Areas, enrolment on EDH is compulsory at the following links (for CERN members of personnel): English / French (1 day classroom course)
• For contractors, please use this link: French only

Radiation protection awareness slides: English / French

Survey

CMS RP survey in UXC55 cavern.

Personal dosimeter and readers

Please first refer to the Dosimetry Service FAQ.

CMS Collective and Individual doses on EMDb.

HRT Radiation Dose records

• Medical Certificate: New policy: CERN will no longer require medical surveillance for category B radiation workers (=dose < 6 mSv/12 consecutive months). Medical certificate no longer used for dosimeter attribution. EU, EEA countries and Switzerland: Institute Certificate or Radiation passport. Other countries: information to home institute. Acceptance of classification by default. More information here.

• Personal dosimeter (or DIS / Passive) is supposed to be replaced after 10 years. Some dosimeters might have a battery default between the two-yearly calibrations, and therefore will display, when inserted in a dosimeter reader, a value which is not reliable. In such a case, do not hesitate to contact the Dosimetry Service or to look at the HRT Radiation Dose records.

• Individual Dosimetry: Do not forget to read your dosimeter (it must be done even if you have not entered the controlled radiation areas).
• A regular read-out is indispensable in order to ensure a periodic monitoring of personal dose. This read-out should be done preferably during the first week of every month.

• Dose displayed by a dosimeter (DIS) reader: At CERN, each reading of a DIS dosimeter is background subtracted with a mean value of 2 uSv per day. A mean background has been established for all CERN territories as 85nSv/h which makes this 2 uSv/day. We also know that this value might slightly fluctuate, depending on your office position at CERN. Considering the latter, this mean correction for all CERN places might be slightly over or under correcting the background dose.
  • The dose that you see on the reader is a continuous integration of doses recorded by your dosimeter since it has been attributed. The doses are not reset after each reading. If a dosimeter is slightly under correcting the background you might accumulated small "fake" (natural) doses of 30, 40, 50 uSv, which are not corrected by the background subtraction. It is the sum of all these doses that you see on the reader even if you do not go for a while in controlled areas. In the other way round, if your dosimeter is slightly overcorrecting the background, one will register zero's even if the dosimeter records small natural doses. In both cases this is not a problem because all monthly personal doses below 75 uSv are accounted as 0 uSv in the official dose file, so it will not bias the dose reports.

In fact, all passive monthly doses below 75 uSv are rounded to 0, CERN is there applying Swiss federal rules that applies to all accredited laboratories in Switzerland. The monthly doses below 75 uSv are rounded to 0 because not