ML20138R502

Proposed Tech Specs Re Operability Requirements for in-core Detector Instrumentation

ML20138R502
Person / Time
Site:	Calvert Cliffs
Issue date:	12/17/1985
From:	BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML19276D116	List: ML20138R498 ML20138R502
References
NUDOCS 8512310320
Download: ML20138R502 (2)

Text

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INSTRUMENTATION ,

I'NCORE DETECTORS - ,

. LIMITING CONDITION FOR OPERATION 3.3.3.2 The incore detection system shall be OPERABLE with at least one OPERABLE detector segnent in each core quadrant on each of the four axial elevations containing incore detectors and as further specified below: -

a. For monitoring the AZIMUTHAL POWER TILT:

eight At least 4we quadrant symmetric incore detector segment g.roups

:::h of th: f .r ::ici :1 ;;tten; containing incere detectors

, in the outer 184 fuel assemblies with sufficient OPE 9,ABLE detector 1 segments in these detector groups to compute at leas two AZIMUTHAL POWER TILT values at eash of the four axial elevations containing inccre detectors. three }

b. For recalibratien of the excore neutron flux detection system:

50 -

1. At least 76% of all incore detector segments,

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, 2. A minimum of 9 OPERABLE incore detector segnents at each detector segment level, and

3. A minimum of 2 OPERABLE detector secnesis in the inner 109 fuel assemblies and 2 OPERABLE segr3nts in the cuter 108 fuel assemblies at each segment level.

c. For monitoring the UNRODDED PLANAR RADIAL PEAKING FACTOR, the UNRODDED INTEGRATED RADIAL FEAKING FACTOR, or the 1

linear heat rate:

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1. At least 95% of all incere detector locations, 1 2.

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A minimum of 9 OPERABLE fnctet detector segments at each detector segnent level, and

3. A t.inimue of 2 OPERABLE detector segments in the inner i

109 fuel assemblies and 2 OPERABLE segnents in the outer 108 fuel assemblies at each segnent 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 incere detectorlocation shall consist of a string in 1

which at least three of the four incere detector segments are OPERAS E.

CALVERT CLIFFS - UNIT 1 3/4 3-29 AnendmentNo.,)df l 8512310320 851217 PDR P

ADOCK 05000317 PDR

1 INSTRUMENTATION t

LIMITING CONDITION FOR OPERATION (Continued)

An OPERABLE quadrant symmetric incore detector segment group shall con-sist of a minimum of three OPERABLE rhodium incere detector segments in 90* symmetric fuel assemblies.

APPLICABILITY: When the incore detection system is,used for:

a. Monitoring the AZIMUTHAL POWER TILT, ,

b. Recalibration of the excore neutron flux detection system, or

c. Monitoring the UNRODDED PLANAR RADIAL PEAKING FACTOR, the UNRODDED INTEGRATED RADIAL PEAKING FACTOR, or the linear heat rate.

ACTION:

4 With the incore detection system inoperable, do not use the system for the above applicable monitoring or calibration functions. The -

provisions of specifications 3.0.3 and 3.0.4 are not applicable.

SURVEILLANCE REQUIREMENTS 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 reouired for:

1. Monitoring the AZIMUTHAL POWER TILT.

2. Recalibration of the excore neutron flux detection systen.

3. Monitoring the UNRODDED PLANAR RADIAL PEAKING FACTOR, the UNRODDED INTEGRATED RADIAL PEAKING FACTOR, or the linear heat rate.

b. At least once per 18 months by performance of a CHANNEL CALIBRATION operation whicn exempts the neutron detectors but includes all electronic components. The neutron detectors snall be calibrated prior to installation in the reactor core.

CALVERT CLIFFS - UNIT 1 3/4 3-30 Amendment No. l

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