ML20206S191
| ML20206S191 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 07/02/1986 |
| From: | NEBRASKA PUBLIC POWER DISTRICT |
| To: | |
| Shared Package | |
| ML20206S182 | List: |
| References | |
| NUDOCS 8607070306 | |
| Download: ML20206S191 (5) | |
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COOPER NUCLEAR STATION TABLE 3.1.1 REACTOR PROTECTION SYSTEM INSTRUMENTATION REQUIREMENTS Minimum Number Action Required Applicability Conditions of Operable When Equipment Reactor Protection Mode Switch Position Trip Level Channels Per Operability is System Trip Function Shutdown Startup Refuel Run Setting Trip Systems (1) Not Assured (1)
Mode Switch in Shutdown X(7)
X X
X 1
A Manual Scram X(7)
X X
X 1
A IRM (17)
X(7)
X X
(5) 5
.o,'25 of in-3 A
High Flux
'ce ed scale Inoperative X
X (5) 3 A
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APRM (17)
X $ (0.66W+54%-0.66AW)
FRP 2
C High Flux (Flow biased)
(14)(19)(20)
MFLPD l
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f High Flux X(7)
X(9)
X(9)
(16)
$ 15% Rated Power 2
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Inoperative X(9)
X(9)
X (13) 2 C
l Downscale (12)
(12)
(12)
X(ll) > 2.5%
2 C
High Reactor Pressure X(9)
X(10)
X 5 1045 psig 2
A NBI-PS-55 A,B,C, & D l
High Drywell Pressure X(9)(8) X(8)
X
$ 2 psig 2
A or D PC-PS-12 A,B,C, & D l
l Reactor Low Water Level X
X X
1 + 12.5 in. indi-2 A or D l
NBI-LIS-101 A,B,C, & D cated level Scram Discharge Instrument Volume X
X(2)
X
< 92 inches 3 (18)
A High Water Level CRD-LS-231 A & B CRD-LS-234 A & B l
CRD-LT-231 C & D CRD-LT-234 C & D
-- h 8607070306 860702 PDR ADOCK 05000209 h
p PDR
1 ie 11..
Th2 APRM downsenlo trip function is only activa whin tha ratetor moda switch is in RUN. When in RUN, this function is automatically bypassed when the companion IRM instrumentation is operable and not upscale, f
12.
The APRM downscale trip is automatically bypassed when the mode switch is not in RUN.
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- 13. An APRM will be considered inoperable if there are less than 2 LPRM inputs per level or there is less than 11 operable LPRM detectors to an APRM.
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14.
W is the two-loop recirculation flew in percent of rated flow, i
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15.
This note deleted.
j 16.
The 15% APRM scram is bypassed in the RUN mode.
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17.
The-APRM and IRM instrument channels function in both the Reactor Protection System and Reactor Manual Control System (Control Rod l
Withdraw Block, Section 3.2.C.).
A failure of one channel will affect both of these systems.
j 18.
The minimum number operable associated with the Scram Discharge Instrument Volume are three instruments per Scram Discharge Instrument Volume and i
three level devices per RPS channel.
19.
AW is the difference between two-loop and single-loop effective drive flow and is 4
used for single recirculation loop operation.
AW=0 for two recirculation loop operation.
I 20.
The ratio of FRP (fraction of rated thermal power) to MFLPD (maximum i
fraction of limiting power density) shall be set equal to 1.0 unless the actual operating value is less than the design value of 1.0, in which case the actual operating value will be used.
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COOPER NUCLEAR STATION TABLE 3.2.C CONTROL ROD WITHDRAWAL BLOCK INSTRUMENTATION Minimum Number Of Function Trip Level Setting Operable Instrument Channels / Trip System (5)-
APRM Upscale (Flow Bias)
- E (0.66W + 42% - 0.66 AW) 'FRP (2)(13)(14) 2(1)
APRM Upscale (Startup) j[12%
MFLPD 2(1)
APRM Downscale (9)
> 2.5%
2(1)
APRM Inoperative (10b) 2(1)
RBM Upscale (Flow Blas)
- E 0.66W + (N - 66) (2) 1 RBM Downscale (9)
> 2.5%
1 RBM Inoperative (10c) 1 IRM Upscale (8)
- E 108/125 of Full Scale 3(1)
I IRM Downscale (3)(8)
> 2.5/125 of Full Scale 3(1) l IRM Detector Not Full In (8) 3(1)
IRM Inoperative (8)
(10a) 3(1)
SRM Upscale (8)
- ( 1 x 10 Counts /Second 1(1)(6)
SRM Detector Not Full In (4)(8)
(> 100 cps) 1(1)(6)
SRM Inoperative (8)
(10a) 1(1) (6)
Flow Bias Comparator j;10% Difference In Recire. Flows 1
l Flow Bias Upscale /Inop.
- [ 110% Recire. Flow 1
SRM Downscale (8)(7)
> 3 Counts /Second (11) 1(1)(6)
SDV Water Level High j[46 inches 1(12)
CRD-231E, 234E
NOTES FOR TABLE 3.2.C 1.
For the startup and run positions of the Reactor Mode Selector Switch, the Control Rod Withdrawal Block Instrumentation trip system shall be operable j
for each function.
The SRM and IRM blocks need not be operable in "Run" mode, and the APRM (flow biased) and RBM rod blocks need not be operable in "Startup" mode. The Control Rod Withdrawal Block Instrumentation trip system is a one out of "n" trip system, and as such requires that only one instrument channel specified in the function column must exceed the Trip Level Setting to cause a rod block.
By utilizing the RPS bypass logic (see note 5 below and note 1 of Table 3.1.1) for the Control Rod Withdrawal Block Instrumentation, a sufficient number of instrument channels will always be operable to provide redundant rod withdrawal block protection.
2.
W is the two-loop recirculation flow rate in percent of rated. Trip level setting is in percent of rated power (2381 MWe). N is the RBM setpoint selected (in percent) and is calculated in accordance with the methodology of the latest NRC approved version of NEDE-24011-P-A.
3.
IRM downscale is bypassed when it is on its lowest range.
4.
This function is bypassed when the count is > 100 cps and IRM above range 2.
5.
By design one instrument channel; 1.e., one APRM or IRM per RPS trip system may be bypassed.
For the APRM's and IRM's, the minimum number of channels specified is that minimum number required in each RPS channel and does not refer to a minimum number required by the control rod block instrumentation trip function. By design only one of two RBM's or one of four SRM's may be bypassed.
For the SRM's, the minimum number of channels specified is the minimum number required in each of the two circuit loops of the Control Rod Block Instrumentation Trip System.
For the RBM's, the minimum number of channels specified is the minimum number required by the Control Rod Block Instrumentation Trip System as a whole (except when a limiting control rod pattern exists and the requirements of Specification 3.3.B.5 apply).
6.
IRM channels A,E,C,G all in range d or higher bypasses SRM channels A&C functions.
IRM channels B,F,D H all in range 8 or higher bypasses SRM channels B&D functions.
7.
This function is bypassed when IRM is above range 2.
8.
This function is bypassed when the mode switch is placed in Run.
9.
This function is only active when the mode switch is in Run.
10.
The inoperative trips are produced by the following functions:
a.
SRM and IRM (1) Mode switch not in operate (2) Power supply voltage low (3) Circuit boards not in circuit y
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NOTES FOR TABLE 3.2.C (Continu:;d) b.
APRM (1) Mode switch not in operate (2) Less than 11 LPRM inputs (3) Circuit boards not in circuit c.
RBM (1) Mode switch not in operate (2) Circuit boards not in circuit (3) RBM fails to null (4) Less than required number of LPRM inputs for rod selected 11.
During spiral unloading / reloading, the SRM count rate will be below 3 cps for some period of time.
See Specification 3.10.B.
1 12.
With the number of OPERABLE channels less than required by the Minimum Number of Operable Instrument Channels / Trip System requirements, place the inoperable channel in the tripped condition within one hour.
13.
AW is the difference between two-loop and single-loop effective drive flow and is used for single recirculation loop operation.
4W=0 for two recirculation loop operation.
14.
The ratio of FRP (fraction of rated thermal power) to MFLPD (maximum fraction of limiting power density) shall be set equal to 1.0 unless the actual value is less than the design value of 1.0, in which case the actual operating value will be used.
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