ML20134L463

Proposed Tech Specs Re Automatic Depressurization Sys Instrumentation to Reflect Planned Logic Mod

ML20134L463
Person / Time
Site:	Hatch
Issue date:	08/23/1985
From:	GEORGIA POWER CO.
To:
Shared Package
ML20134L450	List: ML20134L447 ML20134L463
References
TAC-57309, NUDOCS 8509030281
Download: ML20134L463 (3)

Text

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ENCLOSURE 4 NRC DOCKET 50-321 OPERATING LICENSE DPR-57 EDWIN I. HATCH NUCLEAR PLANT UNIT 1 REQUEST TO REVISE TECHNICAL SPECIFICATIONS ADS LOGIC MODIFICATION The proposed change to the Hatch Unit 1 Technical Specifications (Appendix A to Operating License DPR-57) would be incorporated as follows:

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Insert Page 3.2-10 3.2-10 3.2-33 3.2-33 t

8509030281 850823 PDR ADOCK 05000321 P

PDR hemmani

Table 3.2-4 INSTRUMENIATION WIIGI INITIATES OR CONIROIS ADS Ref. Instrument Trip Recuired Trip Setting Remarks

!b.

Condition Operable (a)

Nomenclature Channels per Trip System (b) 1.

Reactor Vessel Water Level Iow (Level 3) 1 1 8.5 inches Confirms low level, ADS permissive Reactor Vessel Water Level Inw Inw Inw 2

2-121.5 inches Permissive signal to ADS timer (Level 1) 2.

Drywell Presmre High 2

1 2 psig Permissive signal to ADS timer 3.

MIR Rinp Discharge High 2

1100 psig Permissive signal to ADS timer Presaire 4.

CS Ramp Discharge High 2

1100 psig Permissive signal to ADS timer l

4 Pressure o

5.

Auto Depresmrization 2

113 Mimtes Bypasses high drywell presmre Iow Water Level Timer permissive upon sustained Level 1.

6.

Auto Depresmrization 1

120 + 12 seconds With Level 3 and Level 1 and high Timer drywell presaire and CS or HIR pump at presaire, timing secuence begins.

If the ADS timer is not reset it will initiate ADS.

7.

Automatic Blowdown Control 1

Not applicable Monitors availability of power to Power Failure Monitor logic system a.

'9*e column entitled "Ref. No." is only for convenience so that a one-to-one relationship can be established between items in Table 3.2-4 and items in Table 4.2-4.

b.

Whenever any COCS mbsystem is recuired to be operable by Section 3.5, there shall be two operable trip systems.

If the recuired mmber of operable channels cannot be met for one of the trip systems, that system shall be repaired or th ye,agtor shall be placed in the Cold Stutdown Condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after this trip system is made or found to be inoperable.

Table 4.2-4 Check, Rinctional Test, and Calibration Minim 1m Freq2ency for Instmmentation Which Initiates or Controls ADS Ref.

Instmment Check Instmment Rinctional Test Instmment Calibration No.

Instnament Minim 1m Frealency Minim 1m Freo:ency Mininum Frealency (a)

(b)

(c) 1 Reactor Vessel Water Level Once/ shift Once/ month Once/ operating cycle (Ievel 3)

Reactor Vessel Water Level Once/ shift Once/ month Once/ operating cycle (Ievel 1) 2 Drywell Presaire None (d)

Bery 3 months 3

HIR Rinp Discharge None (d)

Every 3 months Presaire 4

CS Rinp Discharge None (d)

D ery 3 months

'f Presaire U

5 Alto Depress 2rization None N/A Once/ Operating Cycle Low Water Ievel Timer 6

Alto Depresaarization None N/A Once/ operating cycle Timer 7

Altomatic Blowdown None Once/ operating cycle None Control Power Failure Monitor Notes for Table 4.2-4_

a.

'Ite column entitled "Ref. No." is only for convenience so that a one-to-one relationship can be established between items in Table 4.2-4 and items in Table 3.2-4

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