SERVICE PROCEDURE

After receiving duly completed PMS-1 and PDF-2 form, depending upon the type of installation, TLD service to an institution may be on monthly or quarterly basis.

For all purposes only one address will be kept in our records. Hence address of the branches temporary sites cannot be entertained.

Each institution and all radiation workers to be monitored will be allotted an institution number and personal number (by BARC) the same should be referred to in all correspondence with us. After allotting of institution no. & person no. service will be started to institution.

HOW TO USE

One TLD badge should be worn compulsorily at the chest level (Chest Badge) for estimation of the whole body dose. If a lead apron is used, (e.g. in diagnostic X-ray departments) TLD badge should be worn under the lead apron at the chest level.

In special cases, if the doses to the hands and forearms are expected to be significantly higher than at the chest level, additional wrist badges may be procured and used.

Persons who working with industrial radiography cameras should compulsorily use wrist badges in addition to chest badge.

The TLD cards shall not be used without being loaded in the holders. It is not possible to determine the nature and energy of the incident radiation from a TLD card used without a cassette and hence dose estimation will not be possible. Whenever working in the radiation field, TLD badge should be always worn.

A TLD badge allotted to one user should not be shared by any other person.

Each institution should keep apart one TLD card (Control Card) loaded in a chest TLD holder (coloured ) as CONTROL which is required for correct dose evaluation. The control badge should be stored in a RADIATION FREE AREA where there is no likelihood of any radiation exposure. Places such as X-ray rooms, rooms in which radioactive materials are stored, handled or used and areas in the immediate vicinity of such rooms are NOT RADIATION FREE AREAS and should be avoided for storing the TLD cards.

While leaving the premises of the institution, workers should submit their badges in the place where the control badge is kept. Also when no radiation work is being carried out, badge should be kept along with the control TLD badge in radiation free area.

After one service period, the used cards have to be replaced by the fresh cards sent by Renentech Laboratories Pvt. Ltd for the next service period & return all the cards (previous service period), (not the cassette), used and/or unused, immediately in one lot within 10 days after the end of the service period. Care should be taken that cards should not be lost or damaged during transit, in occurrence of such dose cannot be read and the institution will have to bear charges for the same.

Please note that all the TLD cards sent should be accounted for by the user institution.

In exceptional cases when fresh cards are not received in time, the old TLD cards may be continued to be used until the new cards arrive, but it should be informed to us immediately to find reason behind it and solve to have uninterrupted service.

If a TLD card is lost at your end, a declaration stating the circumstances under which the card was lost, duly signed by the user and the officer-in-charge/R.S.O./Physicist, should be sent to us.

A TLD cassette holder showing any of its filters (metallic pieces) loose or falling off, or otherwise damaged should not be used. Ask for replacement of such holders. The cassette for replacement will also be charged.

ENSURE THAT YOUR BADGE IS NOT LEFT IN THE RADIATION FIELD OR NEAR HOT PLATES, OVENS, FURNACES and BURNERS etc.

Institutions using open/unsealed radioactive sources should periodically check the TLD cassette for radioactive contamination by using suitable instruments. The cassette which is found to be contaminated should be disposed of at your end as radioactive waste. The contaminated badges should not be returned to us.

If high exposures to persons are suspected, their TLD cards can be returned immediately to us along with the details of the incidence for urgent processing and necessary action.

CHANGES IN REQUIREMENT / ADDITION / DELETION OF NAMES

Specify the changes in the requirements, if any, clearly in the following format.

• Names to be added.
• Names to be deleted.
• Additional requirement of chest/wrist TLD cassettes, if any.

For persons to be added a Personal data form (PDF-2 form) should be filled in for each radiation worker and the same should be sent to us (for monthly service institution PDF-2 should be sent to AERB).

Intimation regarding changes in the requirements or suspension of service of radiation worker, if any, should reach Renentech Laboratories Pvt. Ltd one month in advance of the intended period of use by letter duly signed by authorized person or by valid email. No changes will be incorporated without receiving request in writing. If the request for deletion is received after the cards have been dispatched, the changes will be incorporated form the next service period only.

All cassettes and TLD cards once dispatched by us, irrespective of whether used or unused will be charged.

DOSE REPORTS

The dose reports are sent after processing the respective personal TLD cards contain current period doses and the up-to-date cumulative doses of the current year.

Soft copy of the dose report will be sent on your email ID (if provided for same) as soon as it is ready and the hard copy of the dose report will be sent along with the next service period TLD cards.

Annual dose reports are sent by BARC after the end of the year and contain annual doses and cumulative life time doses of all radiation workers. Any discrepancy in the annual dose report should be intimated to us promptly and positively within three months from the date of dispatch of the report. Complaints received subsequent to this period will not be entertained.

Dose equivalent recorded by the chest badge exceeding 10 mSv (1000 mRem) & by wrist badge exceeding 250mSv is treated as overexposure and the same is reported promptly to AERB. Which will be reviewed and adviced by AERB depending upon investigation report from institution.