Good Morning Fermi-2 has used pulsed x-ray for erosion / corrosion testing for the past two outages with good results. Our vendor used the Golden Engineering Model 4 which is in the 300 to 400 KeV range. Prior to using the device we performed testing at the vendors facility first with the Model 3 and then with the model 4. Our instrumentation performed well with both devices with the major differences were the intensity of the beam and higher dose rates with the model 4. During the past two outages we have continued testing with various instruments and dosimetry devices as follows: RO-20 performed well Fluke 451P performed well Standard EDs (MG 2000s) were virtually unresponsive to either device Any GM type device were virtually unresponsive to either device Standard Pocket Ion Chambers performed well TLDs (Panasonic UD 802) performed well Landauer OSL dosimeters responded similar to the Panasonic for the Model 4 If you require any additional information you can contact me directly Wayne Ruttenberg Fermi2 - ALARA Group 734-586-5306 [email protected]
[email protected] wrote: ----- >To: "[email protected]" <[email protected]> >From: "BREHM, DAVID M" <[email protected]> >Sent by: [email protected] >Date: 07/17/2013 09:55AM >Subject: Powernet: RE: X-Ray Radiography Experience? > > >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] >585-771-3577 > > >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 > > >This e-mail contains Omaha Public Power District's confidential and >proprietary information and is for use only by the intended >recipient. Unless explicitly stated otherwise, this e-mail is not a >contract offer, amendment, or acceptance. If you are not the intended >recipient you are notified that disclosing, copying, distributing or >taking any action in reliance on the contents of this information is >strictly prohibited.
