Byron and Braidwood have combined the 30% and 50% flux maps. Actually, we have several conditional statepoints, but we typically only perform a flux map at ~41% and ~100%. If we had BEACON inoperable and performed the first flux map < 40%, we would perform another flux map < 80% (rare).

We don't stabilize at all because BEACON handles the Xenon build-in and provides the "reference" values for the conditions that exist.

Kevin S. Elam Reactor Engineer Byron Station Work Phone: (815)406-2247 Home Phone: (815)965-6065

-----Original Message----- From: pwrrm-bounces@retaqs.com [mailto:pwrrm-bounces@retaqs.com] Sent: Friday, February 10, 2006 12:32 PM To: pwrrm@retaqs.com Subject: [Pwrrm] FW: Power Ascension Flux Mapping for Westinghouse PWRs

From: Bojduj, William [mailto:WXB2@pge.com] Sent: Friday, February 10, 2006 1:26 PM To: peter.moravek@exeloncorp.com; pwrrm-bounces@retaqs.com Subject: Power Ascension Flux Mapping for Westinghouse PWRs

RE folks:

I would greatly appreciate it if you could answer the following three questions for your Westinghouse PWRs:

(1) Do you perform a flux map at ~30% RTP and ~50% RTP?

(2) How long do you stabilize before collecting MIDS data at these plateaus?

(3) What is the basis for the stabilization times?

Best Regards, Bill Bojduj ☺ Diablo Canyon Power Plant Senior Advisory Engineer Reactor Engineering P.O. Box 56 Mail Stop 104/4/4B Avila Beach, CA 93424 805-545-3177 (Fax: 805-545-6992)

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