Information Notice No. 85-07: Contaminated Radiography Source Shipments
SSINS No.: 6835
IN 85-07
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
WASHINGTON, D.C. 20555
January 29, 1985
Information Notice No. 85-07: CONTAMINATED RADIOGRAPHY SOURCE SHIPMENTS
Addressees:
All NRC licensees authorized to possess industrial radiography sources.
Purpose:
This information notice is intended to alert receivers of radiography
sources of recent discoveries of removable contamination on shipping
containers arriving at licensee sites from a source supplier. It is expected
that recipients will review the information in this notice for applicability
to their facilities and consider actions, if appropriate, to preclude a
similar problem. However, suggestions contained in this information notice
do not constitute NRC requirements; therefore, no specific action or written
response is required.
Description of Circumstances:
A large east coast shipyard recently received three consecutive iridium-192
radiography source shipments from Gamma Industries, an Agreement State
supplier, that exhibited significant contamination on the bottom of the
source changers contained within an overpack. Radiation levels on removable
contamination wipes ranged up to 0.4 milliroentgens/hour. Several shipyard
employees were contaminated, and their vehicles and homes were required to
be surveyed to ensure that no contamination was spread.
Discussion:
Gamma Industries will be sending leak test kits to users of their Model C-10
source changers and will be requesting that the exterior of the changers be
wiped and the wipes returned to Gamma Industries for analysis. However,
because source changer models other than the C-10 are loaded in the same way
by Gamma Industries, it is suggested that licensees survey other types of
Gamma Industries shipping containers in their possession by wiping the
entire external surface with a paper towel and then surveying the towel in
an area of low background radiation with their most sensitive survey meter
set to the lowest scale range. If contamination is detected, it would be
advisable to contact the container shipper and the appropriate NRC regional
office.
Although contamination surveys are not specifically required by 10 CFR
20.205 because the sources are a special form, the NRC suggests that surveys
for gross
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IN 85-07
January 29, 1985
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contamination be made on shipping containers containing radiography sources
on a routine basis, regardless of supplier, to ensure that workers and the
public are not unnecessarily exposed to radiation from surface
contamination.
No specific action or written response is required by this information
notice. If you have any questions regarding this matter, please contact the
Regional Administrator of the appropriate NRC regional office or this
office.
J. Nelson Grace, Director
Division of Quality Assurance,
Safeguards, and Inspection Programs
Office of Inspection and Enforcement
Technical Contact: J. R. Metzger
(301) 492-4947
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