Warna Teks  default purple blue contrast
Saiz Teks A- A A+

Pilihan bahasa

IKN-RS-SOP-20: Procedure of Leaking Testing of Sealed Source

DOCUMENT NO.   :  IKN-RS-SOP-20

INTRODUCTION

Sealed source must be tested for leakage or contamination at intervals not to exceed six months. Records of leak test results on all sealed sources are maintained in every each department

PURPOSE

To comply with the Atomic Energy Licensing Act 304 Radiation Protection (Transport) Regulation 1989. This procedure applies to Nuclear Medicine Department in order to protect workers and public from unnecessary exposure from radioactive material.

RESPONSILIBILITY

  • Radiation Protection Officer (RPO)
  • Physicist
  • Radiation Workers

 

Frequency

Semi Annually

 

Equipment

  • Alcohol swabs, small zippered plastic bags or scintillation vials, tweezers or grip tongs and protective gloves
  • Refer Table 1

 

PROCEDURE

The following sealed sources are exempt from the periodic leak test requirements

  • Hydrogen-3 (tritium) sources.
  • Sources containing licensed material with a half-life of 30 days or less.
  • Sealed sources containing licensed material in gaseous form.
  • Sources of beta- or gamma-emitting radioactive material with an activity of 3.7 MBq or less.
  • Sources of alpha- or neutron-emitting radioactive material with an activity of 0.37 MBq or less.
  1. Personnel must wear a TLD ring and personnel dosimeter when performed leak testing of sealed sources.
  2. Label the zippered plastic bags or the outer cover of the cap of the scintillation vial with the proper description.
  3. Wipe the external sealed source using the alcohol swab. Allow the smear to dry before counting.
  4. Fold the wipe over and place in the plastic bag or place the wipe/swab in the labeled scintillation vial.
  5. Place the swab in NaI (Tl) Well Counter for counting the activities of the swabs.
  6. Evaluate the results of the leak test surveys.
  7. If the result exceeds the limit of 185 Bq, the sealed source is leak and need for further decontamination, repair or disposed as radioactive waste and immediately withdrawn from use. While, if it is below than 185 Bq, the sealed source is safe for use.
  8. All the result shall record in IKN-RS-F-071 Sealed Source Leak Test Form

 20 table 1

WORKFLOW

20 workflow

REFERENCES

  1. Atomic Energy Licensing (Basic Safety Radiation Protection) Regulations 2010.
  2. Nuclear Medicine Resource Manual, IAEA 2006.
  3. Radiation Protection in Nuclear Medicine, Radiation Protection Series Publication No. 14.2, ARPANSA 2008.
  4. Release of Patients After Radionuclide Therapy, Safety Reports Series No. 63, IAEA 2009.

 

DISCLAIMER

This Standard Operating Procedure (SOP) was developed based on compilation of best available information, knowledge, field experience, and general practices to provide guidance to IKN staff in performing the activities defined herein, in a consistent and standardised manner.
IKN does not guarantee nor accept any legal liability whatsoever arising from or connected to the accuracy, reliability, currency or completeness of any material contained herein.
IKN shall take no responsibility for and will not be held liable for this document being temporarily unavailable due to technical issues beyond our power and control.