ML20248G888
| ML20248G888 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 10/03/1989 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML20248G890 | List: |
| References | |
| NUDOCS 8910110073 | |
| Download: ML20248G888 (3) | |
Text
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l 3-IllSTREENTATIGI i
INCORE DETECTORS LIMITING ColEITIOff FOR OPERATI(Mt 4
3.3.3.2 The incore detection system shall be OPERABLE with at least one l
OPERA 8tE detector segment in each core quadrant on each of the four axial' elevations containing incore detectors and as further specified below:
a.
For monitoring the AZIIRITHAL POWER TILT:
At least two quadrant symmetric incore detector segment groups at each of the four axial elevations containing incore detectors in the outer 184 fuel assemblies with sufficient OPERABLE detector segments in these detector groups to computer at least two AZIMUTHAL POWER TILT values at each of the four axial elevations containing incore detectors.
b.
For recalibration of the excore neutron flux detector system:
1.
At least 75% of all incore detector segments, l
2.
A minimum of 9 OPERABLE incere detector segments at each detector segment level, and 3.
A minimum of 2 OPERABLE detector segments in the inner 109 fuel assemblies and 2 OPERA 8LE segments in the outer 108 fuel assemblies at each segment level, c.
For monitoring the UNR000E0 PLANAR RADIAL PEAKING FACTOR,the UNR000ED INTEGRATED RADIAL PEAKING FACTOR, or the linear heat rate:
1.
At least 75% of all incere detector locations, 2.
A minimum of 9 OPERABLE incore detector segments at each detector segment level, and 3.
A minimum of 2 OPERABLE detector segments in the inner 109 fuel assemblies and 2 OPERABLE segments in the outer 108 fuel assemblies at each segment level.
An OPERABLE incere detector segment shall consist of an OPERABLE rhodium detector constituting one of the segments in a fixed detector string.
An OPERABLE incore detector location shall consist of a string in which at least three of the four incore detector segments are OPERABLE.
1 CALVERT CLIFFS - UNIT 1 3/4 3-29 Amendment No. 34, I!6, 129 8910110073 891003 PDR ADOCK 05000317 P
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INSTRUMENTATION LINITING CONDITION FOR OPERATIOM (Continued)
An OPERABLE quadrant symmetric incore detector segment group shall consist of a minimum of three OPERABLE rhodium incore detector segments in 900 symmetric fuel assemblies.
APPLICABILITY: When the incore c'etection system is used for:
a.
Monitoring the AZIMUTHAL POWER TILT, b.
Recalibration of the excore neutrot; flux detection systeit:. or c.
Monitoring the UNR000ED PLANAR RADIAL PEAKING FACTOR, the UNR000ED INTEGRATED RADIAL PEAKING FACTOR, or the linear heat rate.
ACTION:
With the incore detection system inoperable, do not use the system for the above applicable monitoring or calibration functions. The provisions of specification 3.0.3 and 3.0.4 are not applicable.
SURVEILLANCE REOUIRENENTS 4.3.3.2 The incore detection system shall be demonstrated OPERABLE:
a.
By performance of a CHANNEL CHECK within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to its use and at least once per 7 days thereafter when required for:
1.
Monitoring t he AZIMUTHAL POWER TILT.
2.
Recalibration of the excore neutron flux detection system.
3.
Monitoring the UNR000ED PLANAR RADIAL PEAKING FACTOR, the UNR000ED INTEGRATED RADIAL PEAKING FACTOR, or the linear heat rate.
b.
At least once per refueling interval by performance of a CHANNEL l
CALIBRATION operation which exempts the neutron detectors but
'i includes all electronic components.
The neutron detectors shall be calibrated prior to installation in the reactor core.
1 i
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CALVERT CLIFFS UNIT 1 3/4 3-30 Amendment No. M,129 l
l l
l I
IllSTREENATIM INCORE DETECTORT LDff7Iffs ColeITI0ff FGR OPERATI(Mi 3.3.3.2 The inr,cro detection systes shall be OPERABLE with at least one OPERAsLE detector segment in each core quadrant on each of the four axial' l
elevations containing incore detectors and as further specified below:
a.
For monitoring the AZIDODIAL POWER TILT:
At least two quadrcnt symmetric incore detector segment groups at each of the four axial elevetions containing incere detectors in the outer 184 fuel assemblies with sufficient OPERABLE detector segmar.ts in these detector groups to computer at least two AZIMUTHAL POWER TILT values at each of the four axial elevations containing incore detectors.
b.
For recalibration of the excore neutron flux detector system 1.
At least 75% of all incera detector segments, l
2.
A minimum of 9 OPERABLE incere detecter segments at each detector segment level, and j
3.
A minimum of 2 GPERABLE detector segments in the inner 109 fuel assemblies and 2 OPERABLE segments in the outer 108 fuel assemblies at each segment level, c.
For monitoring the UNR000ED PLANAR RADIAL PEAKING FACTOR,the UNRdODCD INTEGRATED RADIAL PEAKING FACTOR, or the linear heat rate:
1.
At least 75% of all intore detector locations, l
2.
A minimum of 9 OPERABLE incore detector segments at each de+.ector segment level, and 3.
A minimum of 2 OPERABLE detector segments in the inner 109 fuel assemblies and 2 OPERABLE segments in the outer 108 fuel assemblies at each segment level.
An OPERABLE incore detector segment shall consist of an OPERABLE rhodium detector constituting one of the segments in a fixed detector stri.ng.
An OPERABLE incore detector location shall consist of a string in which at least three of the four incore detector segments are OPERABLE.
4 CALVERT CLUTS - UNIT 1 3/4 3-29 Amendment No. 34, II6, 129
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