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WRC-107 Questions

WRC-107 Questions

WRC-107 Questions

(OP)
I have a few points on these calculations I would like to clear up for myself.

1. When I perform a WRC-107 on a repad for a nozzle I model it like it is a hollow attachment with the thickness of the nozzle thickness + the pad width.  I would like some comments on this method.  I intend this to check the pad not the nozzle.

2. When I do allowable combined stresses I only allow a yield multiplier of 1 for the sustained loads.  I cannot see a clear way around this in UG-23 of Section VIII-I.  Comments on this?

3. For large nozzles with large pads how can I incorporate attenuation into checking the pad or is it something that I am missing when looking at the WRC-107 rules?

Thanks in advance.

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