LCO 3.2 (all about COLSS)

when is the power Distibution LCO applicable?

Mode 1 and greater than 20% RTP

what is the LHR ratio acceptable per LCO 3.2?

LHR less than 13.1 Kw/ft

if LHR is out of band with COLSS in service, how quickly do we need to restore LHR?

restore within limits in 1 hour

if LHR is out of band with COLSS inoperable, what actions are taken?

trend every 15 minutes

adverse trend and rising, restore in 1 hr

no adverse trend, restore in 4 hours

what is the purpose of the LHR limit?

prevents fuel clad failure during a LOCA by maintaining fuel cladding temp under 2200 F

what is required if tilt is not within the COLR limits or greater than.03 with COLSS inoperable what actions are required

reduce power to less than 50% in 4 hours

reduce VOPT setpoint to 55% in 16 hours

restore and correct prior to raising power

what are the TILT limits with COLSS operable and COLSS inoperable

COLSS operable

10% when less than 50% power

5% when greater than 50% power

COLSS inoperable

3%

what is required if DNBR is out of range?

maintain power below DNBR POL (COLSS operable) or COLR limits (use CPC channel when COLSS inop)

if COLSS operable restore limits within 1 HR

if COLSS inop

trend every 15 minutes

adverse trend restore in 1 hr

no adverse trend restore in 4 hours

how are CPC values of DNBR/LHR affected by a slipped or dropped CEA

values are non-conservative and are not to be used to check DNBR/LHR limits

assume and adverse trend exists

how is trend on DNBR/LHR affected when power is not stable (not ± 1%)

if lowering power DNBR/LHR rend data is not valid

Assume adverse trends exist