Here is what Duke Energy (Oconee Nuclear Station, Catawba Nuclear Station, & McGuire Nuclear Station) uses:
A positive change in reactivity GREATER THAN OR EQUAL TO:
· 0.05% ΔK/K (50 pcm) beyond intended change or expected tolerance (Mode 2 only) OR
· 0.35% ΔK/K (350 pcm) beyond intended change or expected tolerance (Mode 3, 4, 5, and 6 only) A negative change in reactivity GREATER THAN OR EQUAL TO 0.15% ΔK/K (150 pcm) beyond intended change or expected tolerance (Mode 2 only)
Carl
Carl D. Fago Event Recovery Manager Oconee Nuclear Station Duke Energy Carolinas Phone: (864) 873-3047 Fax: (864) 873-3374 Email: Carl.fago@duke-energy.commailto:Carl.fago@duke-energy.com
From: pwrrm@retaqs.com [mailto:pwrrm@retaqs.com] On Behalf Of ddgoff@aep.com Sent: Tuesday, December 28, 2010 2:53 PM To: pwrrm@retaqs.com Subject: [Pwrrm] values of "x" for PI
What values of "x" are plants using for example criteria 3.9 and 4.6 in the PWR Reactivity Management Performance Indicator PI?
David Goff Reactor Engineer Donald C. Cook Nuclear Plant 269-465-5901 x1465