ML20112F734
| ML20112F734 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 06/04/1996 |
| From: | WISCONSIN ELECTRIC POWER CO. |
| To: | |
| Shared Package | |
| ML20112F732 | List: |
| References | |
| NUDOCS 9606100083 | |
| Download: ML20112F734 (3) | |
Text
_. _..
15.2.3 LIMITING SAFETY SYSTEM SETTINGS, PROTECTIVE INSTRUMENTATION l
Acolicability:
Applies to trip settings for instruments monitoring reactor power and reactor coolant pressure, temperature, flow, pressurizer level, and permissives related to reactor protection.
l Ob.iective:
To provide for automatic protective action in the event that the principal process variables approach a safety limit.
Speci ficatio.n-1.
Protective instrumentation for reactor trip settings shall be as follows:
l 1
A.
Startup protection l
(1)
High flux, source range - within span of source range instrumentation.
(2)
High flux, intermediate range - :s40% of rated power.
l (3)
High flux, power range (low setpoint) - :s25% of rated power.
l 1
B.
Core limit protection (1)
High flux, power range (high setpoint) l
- s108% of rated power (2)
Highpressurizerpressurej- :s2385 psig [o[rRel([16HQis]
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15.2.3-1 Unit 1/ Unit 2
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(3)
Lowpressurizerpressure]-
- d866[9)]psigforoperationat2250 idM0 { primary system pressure psia 8
a primary system pressure (4)
Overtemperature 1
AT ( 1 +r,S )
- s;AT, (K -K,(T( 1 +r,S)-T')( 1 +r,S 1
+K,(P-P ') -f( AI) ) )
i 1 +r,S where indicated AT at rated power, 'F AT, average temperature, *F T
=
T' s
573.9'F (Unit 1) 4 T'
s 570.0 F (Unit 2) pressurizer pressure, psig P
=
2235 psig P'
=
K, s
1.30 0.0200 K,
=
0.000791 K,
=
25 sec r
3 3 sec r,
=
2 sec for Rosemont or equivalent RTD r,
0 sec for Sostman or equivalent RTD
=
2 sec for Rosemont or equivalent RTD r.
0 sec for Sostman or equivalent RTD
=
and f(AI) is an even 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, where q, and q, are the percent power in the top and bottom halves of the core respectively, and q, + q, is total core power in percent of rated power, such that:
(a) for q, - q, within -17, +5 percent, f(AI) = 0.
(b) for each percent that the magnitude of q, - q, exceeds +5 percent, the AT trip setpoint shall be automatically reduced by an equivalent of 2.0 percent of rated power for Unit 1, or by an equivalent of 3.1 percent of rated power for Unit 2.
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4 a.
The design seismic ground acceleration, 0.06g, acting in the horizontal and 0.04g acting in the vertical planes
]
simultaneously, with stresses maintained within code allowable working stresses.
I b.
The maximum potential seismic ground acceleration, 0.12g, j
acting in the horizontal and 0.08g acting in the vortical l
planes simultaneously with no loss of function.
3.
The ::=in:1 liquid v;1um: Of the Re:: tor C 01:nt Sy:te=, :t r:ted Oper: ting tenditions, i; 5040 cubic f :t.
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Referenees j
(1) FSAR Section 3.2.3 l
,l (2) FSAR Section 3.2.1 l
(3) FSAR Section 3.2.3 l
(4) FSAR Section 3.2.3 (5) FSAR Sections 3.2.1 & 3.2.3 l
(6) FSAR Table 4.1-9 i
)
1 Unit 1 - Amendment 86
";y 22, 1086 i
Unit 2 - Amendment 90 15.5.3-3 October 5, 1984 i
1