-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
[email protected]
Sent: Thursday, January 19, 2012 2:12 PM
To: [email protected]
Subject: Powernet: Lead blanket and scaffold storage in containment
DC Cook would like to know in regards to Lead/Scaffold Storage in
Containment:
Do sites store lead blankets (high temp or normal) and/or scaffold in
containment during power operations (between RFOs)? At Fort Calhoun Station, we
do not store scaffold in containment during power operations, however, we do
store lead blankets in containment during power operations. They are stored in
stainless steel boxes. This, of course, had to be analyzed and approved by
engineering (box design and location).
Has this changed the frequency at which the lead/scaffold must be
replaced? No
What kind of storage container/materials are used? As stated above,
stainless steel boxes.
What dose and time benefits have you seen/are expected? There are many
benefits. Time is a huge benefit in that it saves a lot of "move in" time on
the front of the outage. We can also get the shielding installed in a timely
fashion to reduce personnel exposure. During an outage previous to having the
storage in containment, we had a situation where we could not open our
equipment hatch due to a ventilation issue, so we couldn't get all the
shielding packages up in a timely fashion. This of course, resulted in more
dose to personnel on the front end of the outage. What we did get hung had to
be taken through the personnel air lock, which is a potential industrial safety
issue. While not a desirable event, it was the push to help us get the
engineering approval to store the lead in containment. Now with the lead
stored there, we don't have to worry about any issues with getting the
equipment hatch open to move lead in and we can get the lead shielding
installed in a timely fashion to reduce personnel exposure.
Thank you in advance.
Elizabeth Emily
Associate Health Physicist
Cook Nuclear Plant
work: 269-465-5901 ext 2545
[email protected]
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Powernet - a service of the Health Physics Society Power Reactor Section
Powernet archives at http://www.mail-archive.com/[email protected]/
Reply to: [email protected]
If Questions, contact Mike Russell, CHP at [email protected]
