Below is the criteria used at BFN for changing dosimeter placement.
In the case of single dosimeter usage, placement of the dosimeter may be varied at RP's (or RSO's) discretion. Repositioning of the whole-body dosimeter should be considered when it is likely that a location on the whole-body will exceed the chest dose by more than 50 percent, and the whole-body dose rate is >100 mrem/hr. It is determine as part of the ALARA preplan or the technician in the field. BFN has not implemented EDEX yet. We are moving in that direction but have some procedural and training issues to resolve first Chuck Creamer Charles E. Creamer Health Physicist Tennessee Valley Authority Browns Ferry Nuclear Plant P.O. Box 2000 (Mail Stop NAB-1G-BFN) Decatur, Al. 35609-2000 Phone: 256-729-2983 Fax: 256-729-3101 Pager: 1-800-323-4853, pin 30-053 mailto:[email protected] <mailto:[email protected]> This electronic message transmission contains information which 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. From: [email protected] [mailto:[email protected]] On Behalf Of Holmes, Stephen J Sent: Monday, August 05, 2013 11:08 AM To: [email protected] Subject: Powernet: Dosimetry Relocation/Multibadging Quick Benchmark Just a couple quick questions on dosimetry relocation and multi-badging. I included the Ginna information for your reference, how do we compare? What is your site's criteria for relocating Dosimetry? Ginna Criteria: Known work area dose rate gradients make it likely that a portion of the whole body will exceed the chest dose by more than 50% AND The DDE potentially missed by NOT moving dosimetry for one work shift (based on 8 hours) could exceed 30 mrem. OR The jobs collective DDE potentially missed by NOT moving dosimetry could exceed 250 mrem. Who determines that Dosimetry relocation is required? Ginna allows an RP Technician in the field to relocate dosimetry with Supervisor concurrence. What is your site's criteria for using Multibadging (EDEX)? Ginna Criteria: Dose rates in work area exceed100 mrem/hr. AND The DDE is likely to exceed 300 mrem during the job. OR Measured or anticipated work area dose rate gradients make it possible for dose to one or more portions of whole-body to exceed that of the chest by more than 50 percent. Who is allowed to determine that multibadging is needed? Ginna requires uses of EDEX to be specified by ALARA on the RWP Stephen Holmes Sr. Plant Health Physicist CENG - RE Ginna This e-mail and any attachments are confidential, may contain legal, professional or other privileged information, and are intended solely for the addressee. If you are not the intended recipient, do not use the information in this e-mail in any way, delete this e-mail and notify the sender. -EXCIP
