Page 19 - Radiation Safety

SAFETY & SECURITY

5 main documents: HOW TO CATEGORIZE THE SOURCES:
1. Code of Conduct (COC 2004)
2. Categorization of radioactive sources (TECDOC 1344) Rule 1 : Source Application
3. Categorization of radioactive sources (RS-G-1.9)
4. Security of radioactive source (TECDOC 1355) Rule 2 : Based on A/D calculation
5. Import & Export Guidelines
i. Calculate A/D ratio:
6 main objectives: A whereas; A – Activity (convert to TBq) T = 10 12
D D – Specific Activity (always in TBq)
To protect
1. Unauthorized access ii. Categorize the source into SOURCE CATEGORY
2. Unauthorized removal
3. Damage Category Activity Ratio (A/D) Applications
4. Loss 1 A/D ≥ 1000 Irradiator / Radiotherapy / Teletherapy
5. Stolen
6. Theft 2 1000 > A/D ≥ 10 Industrial Radiography / High Dose Brachytherapy
3 10 > A/D ≥ 1 Nuclear Gauging & Brachytherapy
4
Loss of control can be: 1 > A/D 0.01 Nuclear Gauging
5 0.01 > A/D Others (XRF, PET)
1. In advertent - misplaced, forgotten, dispersed, insecurely & A > exempt
stored, unintended or collateral theft.
2. Intentional - Abandoned, dumped & directly stolen. iii. Group the source category into SECURITY GROUP to determines the security measures
Criminal purposes can be: Types of security measures : 1. Technical Measures (T)
2. Administrative Measures (A)
1. Malevolent - Intent to harm others, terrorist threats
2. Financial - Illegal sale for profit, avoidance of costs or
other burdens of ownership.
A B C D

1 2 & 3 4 5

Deter (T) Deter (T) Deter (T) Detect (A)
Detect (A) Detect (A) Detect (A)
Delay (T) Delay (T)
Response (A)