ML052990085

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Enclosure, Technical Specifications, Amd MC7612, Equation for Over-Temperature Delta T Function Allowable Value
ML052990085
Person / Time
Site: North Anna  Dominion icon.png
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