![]() It will be a scientific break trough if it is a fact. May be he has used some hither to unknown screens or image enhancing technologies. It will be interesting to know the parameters claimed to have been used for making these radio graphs. Producing any reasonable radio graph with more than 2 density and due sensitivity with the kind of exposure times required, is beyond the known theory or practice. This means that an Iridium source of 100 Ci strength becomes only 0.006 Ci after penetrating 14 half value layers. The half value layer of Ir-192 in steel is about 13mm.ġ90 mm of steel has about 14 half value layers. Re: Radiography with IR-192 In Reply to Nigel Armstrong at 00:18 Jun-08-2014. DEPUTY GENERAL MANAGER BHEL CORPORATE R&D, DEPUTY GENERAL MANAGER BHEL CORPORATE R&D, India, Joined Jan 2003, Conclusion: It appears that low dose platinum infusional chemotherapy can be added safely to patients receiving interstitial iridium-192 implants along with interstitial hyperthermia for head and neck malignancies. R & D, NDT tecniques metallurgy TAKEN VRS FROM THE POSITION OF SR. I cannot force the fabricator to change their radiation source if I’m presented with acceptable films… I just need a confirmation from any of the experts out there and if possible, a technical reference, that Ir-192 DEFINITELY CANNOT penetrate 190 mm steel thickness. However now as the client’s rep, I think it’s pushing it if we want to use Ir-192 to penetrate 190 mm of steel. Iridium-192 is a radioactive isotope, meaning it's a version of iridium with a different number of neutrons than is contained in the dominant forms of the element. This field experience somehow denies the “text book knowledge” that Ir-192 can only be used up to with 76 mm thick of steel. All of the above requirements were somehow met.īack in my days as RT operator, I too had personally conducted RT using Ir-192 on a 95 mm thick weld (SWSI) and the result met ASME V IQI and density requirements. RT as per ASME I only requires that the density is achieved, IQI is achieved and the Ug doesn’t exceed 1.8 mm. The pipe-to-pipe header weld joints were constructed as per ASME I requirements. The material can be enriched so as to reduce the contamination of radioactive 194 Ir from 193 Ir and increase 192 Ir production. ![]() 191 Ir composes 37.3 of natural iridium, 193 Ir making 62.7. Re: Radiography with IR-192 In Reply to Nigel Armstrong at 01:53 Jun-06-2014. Iridium 192 192 Ir is produced in the nuclear reactor in the reaction 191 Ir (n,) 192 Ir. ![]()
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