RE: [Respvr] Ramp rates with and with out leaking fuel assemblies - Respvr

18 May 2006


      See below answers for Byron (Exelon)
-----Original Message-----
From: respvr-bounces@retaqs.com [mailto:respvr-bounces@retaqs.com]On Behalf Of Delk, Whiting S.
Sent: Thursday, May 18, 2006 7:09 AM
To: respvr@retaqs.com
Cc: Lemons, James F.
Subject: [Respvr] Ramp rates with and with out leaking fuel assemblies
Please provide your PWR fuel duty limitations (both sound and leaking fuel, increasing and decreasing power, etc.).
No leaking Fuel/Start up after refueling:
0 - 40%      no limit (15 %/hr is planned rate)
  40 - 75%      3 %/hr 
  75 -100%     0.5 %/hr
Ramp rate up and Power break points at which ramp rate changs.
No leaking fuel Normal Operations:
0 - 40%      no limit (15 %/hr is planned rate)
  40 - 75%      3 %/hr 
  75 -  90%        2 %/hr 
  90 -100%       1 %/hr
Ramp rate down.
100 - 0%      no limit (15 %/hr is planned rate)
Ramp rate (and break points) return to RTP.
see above
Restrictions on Ramp rates with Leaking Fuel:
Ramp rate down.
DOWN
  100 -  90%        3 %/hr 
    90 -  40%       10 %/hr 
   40 -    0%        15 %/hr
Ramp rate (and break points) return to RTP.
UP   
   0 - 20%      15 %/hr 
 20 - 40%        5 %/hr 
 40 - 75%        3 %/hr
75 -  90%        2 %/hr 
  90 -100%       1 %/hr
Thanks for your assistance. I will repackage and send to responders. Thanks for your valuable time.
Whiting S. Delk
Reactor Engineering Supervisor
Watts Bar Nuclear Plant
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