Containment Dose Rates vs Run Time

[BYRPV@ccmail.ceco.com]

  This is an inquiry to Pressurized Water Reactor generating stations.
  
  We would like to establish a relationship, if any between long runs 
  (between outages) and higher general area dose rates inside the bioshield. 
  
  We had a run of 508 days on unit 1 ending in 1994 after which we had 
  unusually high dose rates inside the bioshield.  Some or all of this was 
  attributed to a secondary startup source leak which liberated Sb-123.  
  Since then, unit 1 has been coming down for mid-cycle maintenance outages 
  due to degrading Westinghouse D-4 steam generators.  General area dose 
  rates are unusually low this outage resulting in approximately 90 person 
  rem savings compared to the projection.  
  
  Unit 2 is in line to experience a 530+ day run.  With your help, we hope 
  to be able to predict whether this run length will affect general area 
  dose rates.  Please send a synopsis of any data you may have gathered on 
  the subject.  Thank you in advance.
  
  Please send responses to Jim Capp: byrzx@ccmail.ceco.com