ML052990085
| ML052990085 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 10/25/2005 |
| From: | Stephen Monarque NRC/NRR/DLPM/LPD2 |
| To: | Christian D Virginia Electric & Power Co (VEPCO) |
| Monarque, S R, NRR/DLPM, 415-1544 | |
| Shared Package | |
| ML052420536 | List: |
| References | |
| TAC MC7612, TAC MC7613 | |
| Download: ML052990085 (1) | |
Text
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RTS Instrumentation 3.3.1 Table 3.3.1-1 (page 4 of 5)
Reactor Trip System Instrumentation Note 1: Overtemperature AT The Overtemperature AT Function Allowable Value shall not exceed the following nominal trip setpolnt by more than 2.0% of AT span.
AT <AToK1-K2(1 +
) T-T'+ K3(P-P')- fl(AI)}
Where: AT is measured RCS AT, OF.
ATO is the indicated AT at RTP, OF.
s is the Laplace transform operator, sec 1.
T is the measured RCS average temperature, OF.
T' is the nominal Tavg at RTP, S [*]"F.
P is the measured pressurizer pressure, psig PI is the nominal RCS operating pressure, 2 [1*] psig K1 S [*]
K2 > [*]/"F K3 Ž [*]/psig
-il[*j sec
¶2 S [*] sec f1(AI)
[ (*J([*]
(qt -
qb))
when qt qb < [*]% RTP 0
when [*]? RTP < qt -
[*] % RTP
[*]j(qt -
qb) -
(*J) when qt qb > [*]% RTP Where qt and qb are percent RTP in the upper and lower halves of the core, respectively, and qt + qb is the total THERMAL POWER in percent RTP.
The values denoted with [*] are specified in the COLR.
North Anna Units 1 and 2 3.3.1-16