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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I know this is an ALARA forum and I apologize up front for this primarily Chemistry post, but this is a great network and I have not found anything nearly as helpful in the PWR Chemistry world.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I hope that one or more of you will point me to a Chemistry contact at a plant that uses nitrogen overpressure on the tank of water used to provide primary makeup demineralized water at a PWR (mine is called the “PWST”) to minimize dissolved
oxygen in the makeup water. I believe this is a fairly common practice but we currently use a tank that is open to the atmosphere with only a bladder to help reduce dissolved oxygen. Our Reactor Coolant Pump vendor believes reducing dissolved oxygen in makeup
water this will allow our RCP seals to last longer between rebuilds – which is ALARA! I would like to know if the higher nitrogen in the resulting makeup water causes higher ammonia and/or any other possible issues associated with primary chemistry.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To minimize any unnecessary traffic on this excellent ALARA forum, I would appreciate replies coming to my email or phone # instead of to this list.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance for any help you can provide.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Jerry Barber<o:p></o:p></p>
<p class="MsoNormal">Robinson Nuclear Plant<o:p></o:p></p>
<p class="MsoNormal"><a href="mailto:Jerry.Barber@duke-energy.com">Jerry.Barber@duke-energy.com</a><o:p></o:p></p>
<p class="MsoNormal">843-951-1496<o:p></o:p></p>
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