ML102720344
| ML102720344 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 09/28/2010 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Cotton K, NRR/DORL, 301-415-1438 | |
| References | |
| Download: ML102720344 (1) | |
Text
Where:
T is measured RCS T, °F.
T0 is the indicated T at RATED POWER, °F.
s is the Laplace transform operator, sec-1.
T is the measured RCS average temperature (Tavg), °F.
T' is the nominal Tavg at RATED POWER, < [*] °F.
K4 < [*]
K5 > [*]/°F for decreasing Tavg K6 > [*]/°F when T > T'
[*] / °F for increasing Tavg
[*]/°F when T< T' t3 > [*] sec f(I) = [*]
The values denoted with [*] are specified in the CORE OPERATING LIMITS REPORT.
The channels maximum Trip Setpoint shall not exceed its computed Trip Setpoint by more than 2.0% of the T span. (Note that 2.0% of the T span is equal to 3.0% of T Power.)
(f) Low reactor coolant loop flow - 91% of normal indicated loop flow as measured at elbow taps in each loop (g) Low reactor coolant pump motor frequency - 57.5 Hz (h) Reactor coolant pump under voltage - 70% of normal voltage
- 3. Other reactor trip settings (a) High pressurizer water level - 89.12% of span (b) Low-low steam generator water level - 16% of narrow range instrument span (c) Low steam generator water level - 19% of narrow range instrument span in coincidence with steam/feedwater mismatch flow - 1.0 x 106 lbs/hr (d) Turbine trip (e) Safety injection - Trip settings for Safety Injection are detailed in TS Section 3.7.
TS 2.3-3 Amendment Nos.