The Radiation Safety Committee has approved the following policies regarding
the use of radioactive materials:
Eating & Drinking
in Radioisotope Laboratories (adopted 6/03) (top)
Eating, drinking, or other similar activities (consuming medicines,
applying cosmetic products, etc.) in rooms labeled as radioisotope use
areas is not permitted except under the following conditions:
- Any area in which eating and drinking occur must be designated as
an Eating/Drinking Area. The Radiation Safety Committee must grant
specific approval to an Authorized User to designate an area to be
an Eating/Drinking Area. The Committee will take into account the nature
of the radioisotope activities in the lab before approving an Eating/Drinking
Area, e.g., a laboratory using Na^125 I may not be granted approval.
- Laboratories in which use or storage of state-licensed radioactive
materials occurs cannot contain spaces designated as Eating/Drinking
- In general, there must be a minimum separation of 5 feet between
any locations in which radioactive materials are used or stored and
an Eating/Drinking Area. However, the Committee may allow smaller separations
if the Committee determines that factors such as the presence of walls
or other physical barriers or the nature of the radioactive source
(e.g., a sealed source) will prevent contamination from readily spreading
into the Eating/Drinking Area.
- An Eating/Drinking Area must be designated with signage stating “Eating/Drinking
Area - No radioactive materials are permitted within this area.”
- Radioisotope work and storage areas must be designated with signage,
tape, or other labeled barriers to indicate that radioactive materials
are stored or used beyond this point.
- Laboratory personnel must remove gloves and wash and survey hands
after working with radioisotopes, and prior to entering an Eating/Drinking
A waste receptacle must be provided within the Eating/Drinking Area and used
only for non-laboratory trash.
- If the layout of the lab is such that it is necessary to carry food
or beverages to the Eating/Drinking Area by passing through the radioisotope
use area, it is not permitted to eat or drink while passing through
the radioisotope use area, and personnel carrying food or beverages
must pass through the radioisotope area without lingering.
- EHS shall conduct spot checks for contamination within and at the
boundary of Eating/Drinking Areas as part of its routine laboratory
- Permission for an Eating/Drinking Area within a laboratory will be
revoked if EHS finds radioactive material or contamination within an
Eating/Drinking Area or if violations of these requirements are observed.
Protective Clothing for Radioisotope
Gloves, a full-length laboratory coat, and closed-toe shoes, are required to
be worn by any person working with an open radioactive source in an
amount equal to or exceeding 0.01 times the quantity given in Appendix
C of the Radiation Safety Guide for any radioisotope, if such work
creates a reasonable potential for contamination. For the most commonly
used isotopes, these quantities are 1 µCi for C-14, 10 µCi
for H-3, 0.01 µCi for I-125, 0.1 µCi for P-32, and 1 µCi
for S-35. However, it is recommended that appropriate protective clothing,
including gloves, a full-length laboratory coat, and closed-toe shoes
should be worn at all times for work with any open radioactive source,
regardless of the source activity. Wearing sandals or open-toed shoes,
when handling the quantities specified above, is prohibited.
Security of Radioactive Materials (top)
All radioactive stock materials and sealed sources must be stored
in a secured container or secured storage area when not in use. Any
room in which an unattended sealed source is being used must be secured.
Exceptions must be approved in writing by the Office of Environmental
Health and Safety. A stock material is defined to be radioactive material
as provided by the vendor and does not include material withdrawn from
the original stock by a researcher for experimental use. This policy
applies to materials for which EHS approval and authorization is required
and does not apply to generally-licensed devices, such as smoke detectors,
static eliminators, electron capture detectors, exit signs, etc.
Training for Personnel in Radioisotope
All researchers working in a laboratory in which open sources of radioactive
materials are used must complete initial and refresher radiation safety
training. The requirement applies to all researchers in an Authorized
User's lab, even those who do not use radioactive materials and are
not likely to enter the radioisotope area. This applies whether or
not the individual has attended previous radiation safety training
Researchers who handle sealed or plated radioactive sources only must
complete initial radiation safety training for sealed source users.
between Princeton University Laboratories (adopted 2/04)(top)
Transfers of radioactive materials between Princeton University Authorized
Users are permitted under the following conditions:
- Transfers of sealed sources or plated sources are not
permitted without written authorization from EHS.
- Transfer of open sources are permitted under the following conditions:
- The lab which originally possesses the material (the transferring
lab) is responsible for ensuring that
the lab asking to receive the material
(the recipient lab) is authorized to
possess the radioisotope in question, prior to the transfer.
- In order to determine whether the recipient laboratory
is appropriately authorized, the transferring
laboratory may either
to inquire about the recipient laboratory’s authorization prior to the transfer
or the transferring lab may follow the EHS web-based procedure for verifying
the recipient’s lab’s authorization
and for sending e-mail notification of
the transfer to
uses the web-based procedure, prior notification
to EHS and prior approval
by EHS of the transfer is not required.
- The transferring lab must make a notation
on the original Vial Use Log indicating
that the transfer has occurred.
- When appropriate (for example, when an
entire vial is being transferred),
EHS will make
and will provide the recipient lab with a new Vial
Use Log for the transferred vial.
- Transfers must comply with requirements
for transporting materials, as
described in the
Radiation Safety Manual.