The only thing that comes to mind is that you may want to use a pressurized ion
chamber dose rate instrument (e.g., Fluke 541P or Ludlum 9DP). They have a
lower energy threshold than the standard ion chamber. We use the 451P for
checking our x-ray machines to good effect.
David Brehm
Radiological Engineer
Office: 402.533.7582
Radiation Protection - Nuclear Operations
Cellular: 402.237-9840
Omaha Public Power District - Fort Calhoun Nuclear Station
Pager: 402.561.3310
9610 Power Lane, Blair, NE 68008
[email protected]
From: [email protected] [mailto:[email protected]] On Behalf Of
Holmes, Stephen J
Sent: Wednesday, July 17, 2013 8:03 AM
To: '[email protected]'
Cc: Eaton, Eric; Pell, Bryan; James, Scott; Garcia, Joseph D
Subject: Powernet: X-Ray Radiography Experience?
We have a proposal for a vendor to come on site and perform radiography using
x-ray equipment. This equipment will emit x-rays of considerably lower energy
(150 kVp max) than our typical gamma source term, and we are concerned about
whether our instrumentation/dosimetry (calibrated to Cs-137) will adequately
measure the dose from this device. We have previously performed pulsed x-ray
radiography at Ginna, and had proven that our instrumentation performed
satisfactorily, but this was at a significantly higher x-ray energy (300-400
kVp max). We plan on using the Fluke-Biomedical 451B ion chamber, Landauer BA
series OSLs, and SRDs (pocket ion chambers) paired with the DMC2000s EDs to
monitor the work.
Do you have experience with x-ray radiography at your facility?
If so, did you do any testing, or anything else (such as a white paper), to
justify your ability to properly monitor the exposure from the x-ray source?
If so, would you be willing to share the results or can you provide contact
information?
Thanks,
-Steve
Stephen J Holmes, CHP, PE
Sr. Plant Health Physicist, CENG-RE Ginna NPP
[email protected]<mailto:[email protected]>
585-771-3577
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