Dear CK,
If client permits you can try multi film technique,which can reduce exposure time drastically.Interpret films by using composite viewing.
Regards,
K.BALAJI
WELDAIDS PRIVATE LIMITED,
BANGALORE
On Fri, 17 Oct 2008 CKPurohit wrote :
>Dear RP,
>
>
>
>We are using 75 Ci source Co-60. Another thing is vessel can not kept in
>enclosure and barricading area will be too large if we combine the source.
>
>
>
>We are using the fast films.
>
>
>
>I want to know on this accelerators for developing..
>
>
>
>If somebody have some info pl come up.
>
>
>
>Regards.
>
>CK
>
>
>
>
>
>
>
> From: materials-welding@googlegroups.com
>[mailto:materials-welding@googlegroups.com] On Behalf Of raghavendra
>pemmaraju
>Sent: Khamis, 16 Okt 08 11:35 pm
>To: materials-welding@googlegroups.com
>Subject: [MW:1216] Re: How to reduce the exposure time for RT
>
>
>
>
>Dear CKP,
>
>you can use combination of two sources together ( unsharpness is not an
>issue since the thickness is 100mm and SFD 2m) this will increase the Curie
>strength of the source.
>
>Also while developing you may increase the Temperature of the developer to 2
>deg.C sothat an imporvement of 0.2 H&D of optical density can be had,
>proportionately you can reduce the exposure time. When you use Combination
>of films ( double film with minimum optical density of 1.3H&D per film), you
>are in tern effectively reducing the exposure time by 40% when compared to
>that of a single film with 2.0H&D optical density.
>
>
>
>you can even try to use high speed films such as AGFA D8 provided you are
>achieving the required sensitivity. This will reduce further 30% of exposure
>time.
>
>Try the above remedies, all the best !
>
>
>
>regards,
>
>
>
>RPE
>
>--- On Thu, 10/16/08, CKPurohit <ck@knm-group.com> wrote:
>
> From: CKPurohit <ck@knm-group.com>
>Subject: [MW:1215] How to reduce the exposure time for RT
>To: materials-welding@googlegroups.com
>Date: Thursday, October 16, 2008, 7:04 PM
>
>Dear Group,
>
>
>
>I need help to find out how to reduce the exposure time for heavy wall
>thickness RT (above 4" thickness and ID of vessels 4 meter) .
>
>
>
>Composite film is one of the option. Any other idea ?
>
>
>
>I heard from my client that there are accelerators available which can be
>used for developing the film to compensate the reduce time of exposure.
>
>
>
>We are using Co-60.
>
>
>
>Regards.
>
>CK
>
>
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