ML021680400
| ML021680400 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 05/23/2002 |
| From: | NRC/NRR/DLPM |
| To: | |
| References | |
| TAC MB2679, TAC MB2680 | |
| Download: ML021680400 (2) | |
Text
RTS Instrumentation 3.3.1 Table 3.3.1-1 (page 5 of 7)
Reactor Trip System Instrumentation Note 1: Overtemperature AT The Overtemperature AT Function Allowable Value shall not exceed the following NOMINAL TRIP SETPOINT by more than 4.3% of RTP.
AT (1 I+,s) 1
< :! T, {K - K, (+'r, S) IT 1
- T'l + K3 (P - P,) - f, (A,)}
(10
+ s) ( 1
+
-'AT (1 +T, s)
(1 +r s)
Where:
AT is measured RCS AT by loop narrow range RTDs, OF.
ATo is the indicated AT at RTP, °F.
s is the Laplace transform operator, sec-1.
T is the measured RCS average temperature, OF.
T' is the nominal Tavg at RTP, < 585.1 OF.
P is the measured pressurizer pressure, psig P' is the nominal RCS operating pressure, = 2235 psig K1
=
Overtemperature AT reactor NOMINAL TRIP SETPOINT, as presented in the COLR, K 2
=
Overtemperature AT reactor trip heatup setpoint penalty coefficient, as presented in the COLR, K3
=
Overtemperature AT reactor trip depressurization setpoint penalty coefficient, as presented in the COLR, r1,Jc2
=
Time constants utilized in the lead-lag controller for AT, as presented in the
- COLR,
= Time constants utilized in the lag compensator for AT, as presented in the
- COLR, "T4, "15
= Time constants utilized in the lead-lag controller for Tavg, as presented in the
- COLR, "T6
= Time constants utilized in the measured Tavg lag compensator, as presented in the COLR, and, fl(AI) = a function of the indicated difference between top and bottom detectors of the power-range nuclear ion chambers; with gains to be selected based on measured instrument response during plant startup tests such that:
(i) for qt - qb between the "positive" and "negative" fi(AI) breakpoints as presented in the COLR; f1(AI) = 0, where qt and qb are percent RATED THERMAL POWER in the top and bottom halves of the core respectively, and qt + qb is total THERMAL POWER in percent of RATED THERMAL POWER; (continued) 3.3.1-18 McGuire Units 1 and 2 Amendment Nos. 202/183
RTS Instrumentation 3.3.1 Table 3.3.1-1 (page 6 of 7)
Reactor Trip System Instrumentation (ii) for each percent imbalance that the magnitude of qt - qb is more negative than the fl(AI) "negative" breakpoint presented in the COLR, the AT Trip Setpoint shall be automatically reduced by the f1(AI) "negative" slope presented in the COLR; and (iii) for each percent imbalance that the magnitude of qt - qb is more positive than the fl(AI) "positive" breakpoint presented in the COLR, the AT Trip Setpoint shall be automatically reduced by the f1(AI)
"positive" slope presented in the COLR.
Note 2: Overpower AT The Overpower AT Function Allowable Value shall not exceed the following NOMINAL TRIP SETPOINT by more than 2.6% of RTP.
AT~l 1,s) 1
- <_ATo {K 4 _ K5 T S
,s TK6LT 1-T]_f 2 (A/)}
(+
2 r
1l+ "3 S l+'"7 S 1+
C6 S
+ r, s Where:
AT is measured RCS AT by loop narrow range RTDs, OF.
AT0 is the indicated AT at RTP, OF.
s is the Laplace transform operator, sec1.
T is the measured RCS average temperature, OF.
T is the nominal Tavg at RTP, < 585.1 OF.
'14
=
Overpower AT reactor NOMINAL TRIP SETPOINT as presented in the
- COLR, K5
=
0.02/°F for increasing average temperature and 0 for decreasing average temperature, K6
=
Overpower AT reactor trip heatup setpoint penalty coefficient as presented inthe COLRforT>T and K6 =OforT<T, tC 1, 'r2
=
Time constants utilized in the lead-lag controller for AT, as presented in the
- COLR, "T3
=
Time constants utilized in the lag compensator for AT, as presented in the
- COLR, T;6
=
Time constants utilized in the measured Tavg lag compensator, as presented in the COLR, "T7
=
Time constant utilized in the rate-lag controller for Tavg, as presented in the COLR, and f2(AI)
=
a function of the indicated difference between top and bottom detectors of the power-range nuclear ion chambers; with gains to be selected based on measured instrument response during plant startup tests such that:
(continued)
Amendment Nos. 202/183 McGuire Units 1 and 2 3.3.1-19