Endress+Hauser FQG60, Technical Information & Operating Instructions

Page: 25 / 32

Source container FQG60
Hauser 25
Routine leak test procedure The capsule enclosing the radiation source must be checked for leaks at regular intervals. Leak tests
shall be performed according to the interval specified by the authority or handling authorization.
NOTICE
Leak test
Leak tests are not only required as routine checkup but also whenever an incident occurs that may
damage the sealed source or the shielding. In such a case the leak test procedure shall be defined by
the responsible radiation safety officer observing the applicable regulations and considering the source
container and all involved parts of the process vessel. The leak test shall be conducted as soon as
possible after the incident. The leak test procedure described below is intended for the following
situations:
‣ as routine leak test procedure during continuous operation,
‣ as routine leak test procedure during continuous storage of the radiation source container,
‣ when placing back the radiation source container into operation after storage.
Leak test procedure
Leak tests shall be performed by a person or an organization authorized to provide leak test services or
using a leak test kit. Leak test kits shall be used according to its supplier's instructions. Records of the
leak test results shall be maintained. Perform following procedure unless otherwise instructed:
A0018519
A Limit Switch and Density measurement (Feature: Emission Angle, Application; Option model: 3)
B Level measurement (Feature: Emission Angle, Application; Option model: 4)
C Density measurement (Feature: Emission Angle, Application; Option model: 5)
1 Wiping surfaces for the leak test along the edge of the nameplate
1. Take a wipe sample at the indicated point. The wipe sample can be taken when the shutter is either
in the "ON" or "OFF" position.
2. Have the samples analyzed by an authorized organization. A source is considered to be leaking if
more than 185 Bq (5 nCi) is detected on a leak test sample.
NOTICE
This limit value is valid for the US. National regulations may define other limits.
In case of an indeed leaking source:
• Contact the responsible radiation safety officer for instructions
• Take appropriate measures to control a potential spread of radioactive contamination from the
source.
• Notify the authority of the fact that a leaking source has been detected.
A B C
1
1
1