ML032400518

Technical Specification, Revising the Frequencies Associated with Surveillance Requirements 3.4.12.5 & 3.4.12.7 Concerning Low Temperature Overpressure Protection System

ML032400518
Person / Time
Site:	Oconee
Issue date:	08/25/2003
From:	Olshan L NRC/NRR/DLPM/LPD2
To:	Rosalyn Jones Duke Energy Corp
References
TAC MB8415, TAC MB8416, TAC MB8417
Download: ML032400518 (4)

Text

LTOP System 3.4.12 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.4.12.1 Verify HPI is deactivated. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> SR 3.4.12.2 Verify each CFT Is Isolated. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> SR 3.4.12.3 Verify pressurizer level Is S level necessary to 30 minutes during RCS assure 2 10 minutes are available for operator heatup and cooldown action to mitigate an LTOP event.

AND 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> SR 3.4.12.4 Verify PORV block valve is open. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> SR 3.4.12.5 Perform CHANNEL FUNCTIONAL TEST for 31 days I PORV.

(continued)

OCONEE UNITS 1, 2, & 3 3.4.1 2-4 Amendment Nos.333, 333, & 334 1

LTOP System 3.4.12 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.4.12.6 Verify Administrative Controls, other than 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> limits for pressurizer level, that assure 2 10 minutes are available for operator action to mitigate an LTOP event are implemented for the following:

a. RCS pressure when RCS temperature Is < 3250 F;

b. Makeup flow rate;

c. Alarms;

d. High pressure Nitrogen System; and

e. Verify pressurizer heater bank 3 or 4 Is deactivated SR 3.4.12.7 Perform CHANNEL CALIBRATION for PORV. 6 months I OCONEE UNITS 1, 2, & 3 3.4.12-5 Amendment Nos. 333, 333, & 334 l

LTOP System B 3.4.12 BASES SURVEILLANCE SR 3.4.12.3 (continued)

REQUIREMENTS The 30 minute Surveillance Frequency during heatup and cooldown must be performed for the LCO Applicability period when temperature changes can cause pressurizer level variations. This Frequency may be discontinued when the ends of these conditions are satisfied, as defined In plant procedures. Thereafter, the Surveillance is required at 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Intervals.

These Frequencies are shown by operating practice sufficient to regularly assess Indications of potential degradation and verify operation within the safety analysis.

SR 3.4.12.4 Verification that the PORV block valve is open ensures a flow path to the PORV. This is required at 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Intervals.

The interval has been shown by operating practice to be sufficient to regularly assess conditions for potential degradation and verify operation Is within the safety analysis.

SR 3.4.12.5 A CHANNEL FUNCTIONAL TEST Is required every 31 days. PORV actuation Is not needed, as Itcould depressurize the RCS.

The 31 day Frequency is based on industry accepted practice and Is acceptable by experience with equipment reliability.

SR 3.4.12.6 Verification that administrative controls, other than limits for pressurizer level, that assure 2 10 minutes are available for operator action to mitigate the consequences of an LTOP event are implemented Is necessary every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. This verification consists of a combination of administrative checks for alarm availability, verification that pressurizer heater bank 3 or 4 Is deactivated, appropriate restrictions on pressurizer level, controls for High Pressure Nitrogen, etc., as well as visual confirmation using available indications that associated physical parameters are within limits.

OCONEE UNITS 1, 2, & 3 B 3.4.12-1 1 Amendment Nos. 333, 333, & 3341

LTOP System B 3.4.12 BASES SURVEILLANCE SR 3.4.12.6 (continued)

REQUIREMENTS The Frequency is shown by operating practice sufficient to regularly assess Indications of potential degradation and verify operation within the safety analysis.

SR 3.4.12.7 The performance of a CHANNEL CALIBRATION Is required every 6 months. The CHANNEL CALIBRATION for the LTOP setpoint ensures I that the PORV will be actuated at the appropriate RCS pressure by verifying the accuracy of the Instrument string. I REFERENCES 1. 10 CFR 50, Appendix G.

2. Generic Letter 88-11.

3. UFSAR, 5.2.3.7.

4. 10 CFR 50.46.

5. 10 CFR 50, Appendix K.

6. 10 CFR 50.36.

OCONEE UNITS 1, 2, & 3 B 3.4.12-12 Amendment Nos. 333, 333, 334 l