ML20055B538

Proposed Tech Spec 3/4.4.7,Table 4.4-3,deleting Requirement for Sampling Chlorides & Fluorides When RCS Sys Is Drained Below Reactor Pressure Vessel Nozzle & Internals &/Or Head, Are in Place

ML20055B538
Person / Time
Site:	North Anna
Issue date:	07/16/1982
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20055B531	List: ML20055B530 ML20055B538
References
NUDOCS 8207220468
Download: ML20055B538 (3)

Text

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TABLE 4.4-3 REACTOR COOLANT SYSTEM CHEMISTRY LIMITS SURVEILLANCE REQUIREMENTS MINIMUM PARAMETER ANALYSIS FREQUENCIES DISSOLVED OXYGEN

• At least once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> 4

CHLORIDE ** At least once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> FLUORIDE ** At least once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> 1

• Not required with T < 250*F aV8 -

• • Not required when the Reactor Coolant System is drained below the reactor pressure vessel nozzle and the internals and/or head are in place.

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ATTACHMENT 2 DISCUSSION OF PROPOSED TECHNICAL M'ECIFICATION CHANGE

N DISCUSSION OF PROPOSED TECHNICAL SPECIFICATION CHANGE The proposed Technical Specification change reflects a revision to Technical Specification 3/4.4.7, Table 4.4-3, for North Anna Unit 1, to delete the requirement for sampling chlorides and fluorides when the reactor coolant system is drained below the reactor pressure vessel nozzle and the internals and/or head are in place.

Currently, chlorides and fluorides in the reactor coolant system require surveillance at least once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. To install the Reactor Vessel Level Indication System, and do the other maintenance, the reactor coolant system is drained below the nozzle, the RHR system is drained and the upper internals are in place. To get the required chloride and fluoride samples for the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> analysis frequency, it would mean that there will be radiation exposure involved because an individual would have to go into the upper internals area (which currently has a 10 R radiation field). Since the reactor coolant system and RHR system are drained, the inventory of chlorides and fluorides will not change. No makeup is planned to the reactor coolant system, and any makeup to the RCS could be detected. 1 Vepco has sampled the chlorides and fluorides in the reactor coolant system prior to fully draining the system. Vepco will resume sampling the reactor coolant system for chlorides and fluorides when the reactor coolant system is refilled, so that the chloride and fluoride inventory will be known and the Technical Specification required surveillance will be followed.

The probability of occurrence or the consequences of a malfunction of equipment important to safety and previously evaluated in the FSAR is not increased because the chloride and fluoride inventory in the reactor coolant system will not change since the reactor coolant system and RHR System are drained and the inventory was known at the last sample.

The possibility of a different type of accident or malfunction than was previously evaluated in the FSAR has not been created because the sampling of chlorides and fluorides will resume when the reactor coolant system is refilled to show that the samples are below their required limits.

The margin of safety as described in the BASIS section of any part of the Technical Specifications is not reduced because sampling of chlorides and fluorides will resume when the reactor coolant system is refilled and the chloride and fluoride inventory was within specifications at the time of drain down. Additional makeup could be detected.

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