At DC Cook we currently do not have any highly irradiated material stored
in our pool via a lanyard however, just in case, below is our procedural
guidance for that process:
( this may or may not answer your question.....we try to discourage this
practice as much as possible ! )
1.1.1 Tethering requirements for objects being stored in either the SFP
or Transfer Canal.
· IF the underwater
contact dose rate on the object is greater
than or equal to 10 rem/hr and less than
100 rem/hr, THEN:
· The tether mechanism must be a
metal cable.
· It must be
locked with the key controlled by Radiation
Protection.
· A sign should be posted in the
vicinity of the tethered
item, informing personnel that there
is a high dose rate
object at the end of the cable and
that retrieval is
prohibited without RP present.
· IF the contact dose rate on the
object is greater than or
equal to 100 rem/hr contact, THEN:
· The tether mechanism must be a metal cable.
· It must be locked
with the key controlled by Radiation
Protection.
· The lock/cable arrangement must be
configured such that
inadvertent retrieval is not possible.
· The lock/cable
arrangement must be approved by the RP
Superintendent/designee
· A sign should also be posted in the
vicinity of the tethered
item, informing personnel that there is
a high dose rate object
at the end of the cable and that
retrieval is prohibited without
RP present.
1.1.2 Ensuring FME guidance from PMP-2220-001-001, Foreign Material
Exclusion (FME) is followed, identify the following:
· the object being stored
· the object?s dose rate
· the date the dose rate was measured
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