1. Positive WBC would be greater than MDA for the counter being used or an
unknown peak that is close to Co-60 peak (1173 keV) with a reasonable
uncertainty. Diagnostic in vivo would be positive if it is greater than MDA for
the counter being used.
2. Positive WBC are documented in Sentinel software under the internal dose
tab.
3. A ROR SAP notification (CR) is written containing the following information:
* Factual information surrounding the deficiency using who (worker
classification/title - no names), what, when, and where type information.
· Complete, concise, description of the occurrence. Include relevant
survey(s) and/or RWP number(s).
· A description of any immediate action taken in response to the
incident.
Survey results are documented in our electronic survey program. A personnel
contamination event report would be used if are software is unavailable.
4. The threshold for a PCE requiring skin dose calculations.
Level 1 PCE - greater than or equal to 100 ncpm to less than or equal to
5000 ncmp
Level 2 PCE - greater than 5000 ncpm less than or equal to 50,000 ncpm
Level 3: PCE - greater than 50,000 ncpm
Note: Estimated dose associated with a frisker reading greater than 50,000 ncpm
β-γ measured at ½ inch by direct frisk and an assumed exposure time of
5 hours is approximately 500 mrem (1% of the annual 10CFR20 dose
limit).
Deep dose equivalent (DDE) is assessed when a particle of 1 μCi or
more is located on the skin for more than an hour.
For a Level 3 PCE we calculate the dose using Varskin.
For a level 2 PCE if the contamination was on the skin for greater than five
hours then we evaluate to determine if a dose calculation is required.
If there is low levels of contamination present or potentially present for
greater than one shift we would consider an evaluation to ensure no dose limits
were exceeded.
Scott Stoffel
Senior Engineer
119/1/123
(805) 545-4422
From: Powernet [mailto:powernet-boun...@hpspowernet.org] On Behalf Of Paciello,
Lara R via Powernet
Sent: Wednesday, July 10, 2019 1:03 PM
To: powernet@hpspowernet.org
Cc: Paciello, Lara R <lpacie...@firstenergycorp.com>
Subject: Re: [Powernet] Whole Body Count/PCE Benchmark
*****CAUTION: This email was sent from an EXTERNAL source. Think before
clicking links or opening attachments.*****
1. What does your site consider a positive WBC? BFN currently considers a
bioassay result (in vitro or diagnostic in vivo) that indicates the presence of
licensed material in a quantity greater than minimum detectable activity (MDA)
for the counter being used as positive. SAME
1. What level positive WBC does your site document a condition report (CR)?
BFN currently documents a CR anytime we have a positive WBC greater than the
MDA for the counter being used. SAME
1. What information do you record for level 1 PCE due to human performance
issues? BFN currently documents a CR and documents survey results on NISP-RP-06
Attachment 4 Personnel Contamination Event Log We only use the log for Level 1
PCEs. BUT we do continue to have outage goals related to level 1 PCEs.
1. What is your sites threshold for a PCE requiring skin dose calculations?
[cid:image001.png@01D537DF.0A578440] [cid:image003.png@01D537DF.0A578440]
Dr. Lara Renz Paciello, CHP
Radiation Protection - Dosimetry Laboratory
Beaver Valley Power Station
724-682-5857
From: Powernet
<powernet-boun...@hpspowernet.org<mailto:powernet-boun...@hpspowernet.org>> On
Behalf Of Bryant, James William via Powernet
Sent: Wednesday, July 10, 2019 3:28 PM
To: powernet@hpspowernet.org<mailto:powernet@hpspowernet.org>
Cc: Bryant, James William <jwbry...@tva.gov<mailto:jwbry...@tva.gov>>
Subject: [EXTERNAL] [Powernet] Whole Body Count/PCE Benchmark
I have been asked to perform a benchmark on whole body counts (WBC), level 1
personnel contamination events (PCE), and skin dose calculation thresholds. I
have included what BFN is currently practicing.
1. What does your site consider a positive WBC? BFN currently considers a
bioassay result (in vitro or diagnostic in vivo) that indicates the presence of
licensed material in a quantity greater than minimum detectable
activity (MDA) for the counter being used as positive.
1. What level positive WBC does your site document a condition report (CR)?
BFN currently documents a CR anytime we have a positive WBC greater than the
MDA for the counter being used.
1. What information do you record for level 1 PCE due to human performance
issues? BFN currently documents a CR and documents survey results on NISP-RP-06
Attachment 4 Personnel Contamination Event Log
1. What is your sites threshold for a PCE requiring skin dose calculations?
BFN currently performs a dose calculation if the SDE or LDE dose is likely to
exceed 100 mrem (or 10 mrem for DDE) which corresponds to the following values:
[cid:image004.jpg@01D537DF.0A578440]
James W. Bryant
Health Physicist
Radiation Protection
Tennessee Valley Authority
Browns Ferry Nuclear Plant
256-729-7413 (w)
jwbry...@tva.gov<mailto:jwbry...@tva.gov>
[https://lakeinfo.tva.gov/web/images/tva_logo_32b.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftva.com%2F&data=02%7C01%7Csjs1%40pge.com%7C77cb80a1e8904c6e18ea08d70571c885%7C44ae661aece641aabc967c2c85a08941%7C0%7C0%7C636983858569436738&sdata=lQ2uB%2FVeSWVmYllcHbdBbTmjY9JZdRMfZKml0KbyoLo%3D&reserved=0>
[https://lakeinfo.tva.gov/web/images/blue_line.png]
[https://lakeinfo.tva.gov/web/images/facebook2.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.facebook.com%2FTVA%2F&data=02%7C01%7Csjs1%40pge.com%7C77cb80a1e8904c6e18ea08d70571c885%7C44ae661aece641aabc967c2c85a08941%7C0%7C0%7C636983858569446746&sdata=7Divo2DVrD5VJWP0PtIgVwAVLgyzeMjn323ACHerEsc%3D&reserved=0>[https://lakeinfo.tva.gov/web/images/twitter2.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftwitter.com%2Ftvanews&data=02%7C01%7Csjs1%40pge.com%7C77cb80a1e8904c6e18ea08d70571c885%7C44ae661aece641aabc967c2c85a08941%7C0%7C0%7C636983858569456755&sdata=1bdTrE3gZDFb3TEUIeMMVTKXwZxm5EeKdoAXtFcfcJ4%3D&reserved=0>[https://lakeinfo.tva.gov/web/images/instagram2.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Finstagram.com%2Ftva&data=02%7C01%7Csjs1%40pge.com%7C77cb80a1e8904c6e18ea08d70571c885%7C44ae661aece641aabc967c2c85a08941%7C0%7C0%7C636983858569466767&sdata=dH7hejO4Tmr6ayDHcyWH5ce7D0%2F579bkobLl0F1rO1c%3D&reserved=0>[https://lakeinfo.tva.gov/web/images/youtube2.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fuser%2FTVANewsVideo&data=02%7C01%7Csjs1%40pge.com%7C77cb80a1e8904c6e18ea08d70571c885%7C44ae661aece641aabc967c2c85a08941%7C0%7C0%7C636983858569466767&sdata=ZkOPi31axyj01XLHViK65HPa8pbC3zScXHOCYLqX71c%3D&reserved=0>[https://lakeinfo.tva.gov/web/images/linkedin2.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Ftva&data=02%7C01%7Csjs1%40pge.com%7C77cb80a1e8904c6e18ea08d70571c885%7C44ae661aece641aabc967c2c85a08941%7C0%7C0%7C636983858569476771&sdata=SeYVixbV%2B8TiOE3%2Flde2igJpoJKj8gVxfPEims2myfI%3D&reserved=0>[https://lakeinfo.tva.gov/web/images/flickr2.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.flickr.com%2Fphotos%2Ftennesseevalleyauthority%2F&data=02%7C01%7Csjs1%40pge.com%7C77cb80a1e8904c6e18ea08d70571c885%7C44ae661aece641aabc967c2c85a08941%7C0%7C0%7C636983858569486784&sdata=CntbsZKE9ddjRkdVNq0bZXPOv9gaEHG%2BXp4MjBatl0w%3D&reserved=0>
NOTICE: This electronic message transmission contains information that may be
TVA SENSITIVE, TVA RESTRICTED, or TVA CONFIDENTIAL. Any misuse or unauthorized
disclosure can result in both civil and criminal penalties. If you are not the
intended recipient, be aware that any disclosure, copying, distribution, or use
of the content of this information is prohibited. If you have received this
communication in error, please notify me immediately by email and delete the
original message.
________________________________
The information contained in this message is intended only for the personal and
confidential use of the recipient(s) named above. If the reader of this message
is not the intended recipient or an agent responsible for delivering it to the
intended recipient, you are hereby notified that you have received this
document in error and that any review, dissemination, distribution, or copying
of this message is strictly prohibited. If you have received this communication
in error, please notify us immediately, and delete the original message.
_______________________________________________
Powernet mailing list
Powernet@hpspowernet.org
http://hpspowernet.org/mailman/listinfo/powernet_hpspowernet.org
