1) the level of
review a plan requires (such as <10% requires shift supervision, >10%
requires shift management, >50% requires station management)
Any plan > 15% (or at OPS request) where
we have more than 6 hours to prepare, requires a formalized plan from Reactor
Engineering. These plans must be approved by the Ops Shift Manager,
Control Room SRO, and RO at the controls prior to commencement.
2) or
2)
when a reactivity plan must be revised (such as > 1 hour delay, rods > 10
steps from the predicted value, current power level step >2% from predicted)
IF Reactor
Engineering is providing continuous coverage for a maneuver
IF actual plant
conditions deviate from the guidance by ≥ 3% Rated Thermal Power, maneuver guidance SHALL be updated per Limit and Precaution
6.3.1.
IF control rod
position is within 15 steps of Rod Insertion Limit OR
IF T-Avg
deviates more than three degrees from prediction or T-Ref at any time step, it
is recommended that maneuver guidance be updated per Limit and Precaution
6.3.2.
Maneuver
guidance MAY also be updated at
the discretion of Operations and Reactor Engineering.
Additional question
How do
other stations incorporate any ramp rate restrictions that may apply?
(Ramp rate alarm, operator training, ramp plan)
The ramp rates
are accounted for during the generation of the plan.
Jon-Michael Vandergriff
Catawba Nuclear Station
Reactor Engineering
(803) 701-4029
Rule #113 - Don't look for opportunities;
make them.
From: Keller, Lee A
Sent: Monday, June 30, 2008 9:33
AM
To: Vandergriff, Jon-Michael
Subject: FW: [Pwrrm] Reactivity
plan approval and revisions/ramp rate alarm
Pls answer.
From: pwrrm@retaqs.com
[mailto:pwrrm@retaqs.com] On Behalf Of Adina.K.Lafrance@dom.com
Sent: Monday, June 30, 2008 9:20
AM
To: pwrrm@retaqs.com
Subject: [Pwrrm] Reactivity plan
approval and revisions/ramp rate alarm
SOER 07-01 recommendation 3 stated that "plans for significant
reactivity changes are reviewed and approved by appropriate station and shift
operations management..." and "If plant conditions delay power
changes, the reactivity plan is revised to meet the new plant conditions and
approved by management".
Does
anyone have specific thresholds for:
1) the
level of review a plan requires (such as <10% requires shift supervision,
>10% requires shift management, >50% requires station management)
or
2)
when a reactivity plan must be revised (such as > 1 hour delay, rods > 10
steps from the predicted value, current power level step >2% from predicted)
Additional
question
How do
other stations incorporate any ramp rate restrictions that may apply?
(Ramp rate alarm, operator training, ramp plan)
Thank
you.
Adina LaFrance
Nuclear Analysis & Fuel
Reactor Engineer
Surry Power Station
Email: Adina.K.LaFrance@Dom.com
Phone: 757-365-2658
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