ML20198H905
| ML20198H905 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 09/30/1998 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20198H862 | List: |
| References | |
| NUDOCS 9812300052 | |
| Download: ML20198H905 (1) | |
Text
. _. _
RTS Instrum:ntation 3.3.1 Table 3.3.1-1 (page 6 of 7)
Reactor Trip System Instrumentation (iii) for each percent Al that the magnitude of qi-go is more positive than the f (AI) " positive" breakpoint presented in the COLR, the AT i
Trip Setpoint shall be automatically reduced by the f5(AI) " positive" slope prest.nted in the COLR.
J Note 2: Overpower AT The Overpower AT Function Allowable Value shall not exceed the following Trip Setpoint by more than 3% (Unit 1) 3.3% (Unit 2) of RTP.
A T (' * ") '
s ATo. Ks - Ks +h #
T - K.
T
- T'
- f, ( AI)
(1 + r, s),1 + r3 s,
r S,1+r.s, 1+r.s 1
r Where: AT is the measured RCS AT by loop narrow range RTDs, "F.
ATo is the indicated AT at RTP, "F.
s is the La ace transform operator, sec".
T,is the measured RCS average temperature, *F.
T is the nominal T., at RTP (calibration temperature for AT instrumentation),
s 585.1*F (Unit 1) s 590.8*F (Unit 2).
K4 Overpower AT reactor trip setpoint as presented in the COLR,
=
Ks 0.02/ F for increasing average temperature and 0 for decreasing average
=
temperature, Ke Overpower AT reactor, trip heatup setpoint penalty coefficient as presented
=
in the COLR for T > T and Ke = 0 for T s T,
Time constants utilized in the lead-lag compensator for AT, as presented in ti, t,
=
the COLR, Time constant utilized in the lag compensator for AT, as presented in the t3
=
- COLR, Time constant utilized in the measured T., lag compensator, as presented T.
=
in the COLR, Time constant utilized in the rate-lag controller for T,y, as presented in the t,
=
COLR, and f(AI) = a function of the indicated difference between top and bottom detectors of 2
the power range neutron ion chambers; with gains to be selected based on measured instrument response during plant startup tests such that:
(i) for qi - go between the " positive" and " negative" f (AI) breakpoints as 2
presented in the COLR; f (Al) = 0, where qi and go are percent 2
RATED THERMAL POWER in the top and bottom halves of the core respectively, and gi + go is total THERMA 1. POWER in percent of RATED THERMAL POWER; 9812300052 901222 A
3 (continued)
Catawba Un s 1 and 2 3.3.1-19 Amendment Nos.173/165 a
.