The General Scientific Division(GSD) is responsible for activities related to Secondary Standard Dosimetry Calibration, Nuclear Instrumentation, Personal Monitoring Service, Public Information and Computer Applications.
|Accredited Secondary Standards Dosimetry Calibration Laboratory|
The Sri Lanka Atomic Energy Board (SLAEB) has established an Accredited Secondary Standards Dosimetry Calibration Laboratory (SSDL) for maintenance of relevant radiation standards and provision of Dosimetry calibration services, required for the country. Dosimetry calibration services are essential for the implementation of Radiation Protection Programme in the country to ensure the radiation safety of workers, public and environment.
It is mandatory that every institution where radiation is used should obtain dosimetry calibration services regularly to calibrate their radiation monitoring devices / instruments to ensure the radiation safety of the work-place. It is also required to obtain calibration services in order to ensure the accuracy of radiation output of radiation treatment equipment. These services would lead to good laboratory practices at places where radiation and radioisotopes are used.
- Provide calibration of radiation monitoring instruments for measurement of Ambient dose equivalent / rate, H*(10) for area / work place/ environmental monitoring instruments.
- Provide calibration of personal monitoring instruments for measurement of personal dose equivalent/, Hp (10).
- Provide calibration of portable surface contamination monitoring instruments.
- Provide calibration of therapy level dosimeters in terms of absorbed Dose to water in a Co-60 beam.
Facility for calibration:
- A gamma irradiator comprising of Cs-137 and Co-60 ,
- X-ray system with ISO 4035-narrow spectrum for protection level beam qualities.
- Reference and measuring instruments with ionization chambers.
- Stability Check sources for all ionization chambers
- Large area reference sources (ISO Classification: C.34645).
Protection level Dosimetry Calibration Procedure:
- New operation quantities recommended by the ICRP are used for calibration of dose rate meters & personal dosimeters.
- A Phantom (PMMA) of 20x20x15 cm3 is used to represent human torso with regard to back scattering of the incident radiation in calibration of individual monitoring.
- Area monitoring instruments/dosimeters are calibrated in free air. Calibration factors at reference conditions (Ambient temperature 20 0C, Atmospheric pressure 101.325kPa Relation humidity 50%) are given when applicable.
How to obtain Protection level calibration services (calibration of radiation monitoring instruments):
Equipment with new batteries should be submitted along with duly completed Calibration Request Form in duplicate.(Download Form). A copy of the manuals of new instruments for first time calibration may be required.
- Arrangements for Protection Level Calibration:
- Therapy Level Calibration
Calibration of Therapy Level dosimeters is provided in terms of Absorbed Dose to Water in a Co-60 beam as per IAEA Technical Report Series No. 398.
- How to obtain Therapy level calibration service:
Duly completed Calibration Request Form in duplicate (Download Form) should be provided. An arrangement for calibration is made in advance by letter, fax, e-mail or telephone.
|Personal Monitoring Service|
The Atomic Energy Regulations make it mandatory for all users of radioactive materials and irradiating apparatus to be monitored by personal monitoring devices approved by the Atomic Energy Authority. The General Scientific Division provides a personal monitoring service for occupational exposure control of radiation workers island-wide, using thermo-luminescent dosimeters (TLDs).
Who is eligible for PMS?
Radiation worker who is likely to receive 1/3 of permissible annual limit of whole body radiation dose, 20mSv, OR Radiation workers recommended by Radiation Protection Division of AEA (Regulatory body).
|Nuclear Electronic Instrumentation Section|
Provision of excellent support services in nuclear instrumentation
for implementation of a sustainable nuclear technology program in the country.
- Provision of repair and maintenance services to institutes that use nuclear electronic equipment.
- Provision of training in the field of nuclear instrumentation.
(Repair and maintenance services are limited to instruments such as Radiation monitors, Gamma Counting systems, and other nuclear analytical systems. Before sending instruments, contact Head of the division).
- Provision of information on applications of nuclear technology to various sectors of the community in Sri Lanka to harness this unique technology for socio-economic development of the country.
- Popularize peaceful applications of nuclear technology among elite as well as grass root level by utilizing media both printed and electronic.
- The Atomic Energy Authority (AEA) Library is a library fully devoted to information on nuclear technology. It houses a large number of publications on Nuclear Technology published by the International Atomic Energy Agency and many other sources.
- Publications are available in the under-mentioned fields, can be issued for reference or can be lent out on an inter-library loan basis.
International Nuclear Information System (INIS): (more details: http://www.iaea.org/inisnkm/inis/aboutinis/overview.html)
International Nuclear Information System (INIS) is a computer based bibliographic database managed by the International Atomic Energy Agency (IAEA).
The database contains entries on publications such as books, research reports, patents, journal articles, conference papers etc., related to peaceful uses of nuclear technology sent by IAEA member states based on research carried out by researchers in their respective countries. The references include title, author, source from which the entry is obtained, year of publication, language, citation, ISSN or ISBN, abstract etc.
Access passwords for INIS for University Libraries could be arranged from IAEA.
Contact: Director ( General Scientific Services ) ,Mr. Anuruddha Jayalath
Tel: Direct- 011 2075233, Office- 011 2533427-8 Mobile- 0718111620