ML20108A534

Proposed Tech Spec Deleting Surveillance Requirement Re Cold Leg Accumulator Isolation Valve Automatic Actuation

ML20108A534
Person / Time
Site:	Mcguire, McGuire
Issue date:	11/12/1984
From:	DUKE POWER CO.
To:
Shared Package
ML20108A524	List: ML20108A521 ML20108A534
References
TAC-56473, TAC-56474, TAC-56476, TAC-56477, TAC-56873, TAC-56874, NUDOCS 8411150046
Download: ML20108A534 (3)

Text

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AttIchment.1 -

• I SURVEILLANCE REQUIREMENTS (Continued)~

b.

At least once~ per 31 days and-within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> after each solution -

volume increase of greater than or equal' to 1% of tank volume by verifying th'e boron concentration of the accumulator solution; .

c.

At-least once per. 31 days -when the RCS pressure is above 2000 psig by verifying that power to the isolation valve operator is disconnected by removal of the breaker from 'the circuit.

E 4.5.1.1.2 ! ach cold leg infection accumulator water. level and pressure channol - shall be ' demonstrated OPERABLE:

a'.

At least once per 31. days by the performance of an ANALOG CHANNEL OPERATIONAL TEST, and

.b. - At least once per 18 months-by the performance of a CHANNEL CALIBRATION.

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2Attichment'2 j f.i- -y .

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c EJustiification-and Safety Analysis-'

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lThe^ proposed ; amendment  ? would del'ete the~~ requirementito ' test the' antomatic ;'

. actuation feature ofJthe cold: leg-accumulator-isolation. valves.' The; automatic actuationifeature has bden madeJobsolete by_a: Westinghouse-

, . approved operating procedure. -

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The. cold ' leg accumulators are designed to automatically inject borated water. ~

-:into-the Reactor Coolant System;(RCS) cold legs-in the? case of--a rapid-RCS depressurization. As required by'the operating' procedure.:during-a planned ,

depressurization. thefcold leg;accumlator. isolation valves-are manually.

- . closed after-the RCS pressure is reduced below 1000'psig'to. prevent-inadvertent injection of the accumulator contents into the RCS. . During: subsequent start-ups.

the valves must be opened to place the cold leg , accumulators--in ' service before

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exceeding 1000 psig.

-The current procedures at McGuire. require that the' Cold:: Leg Accumulator Isolatiion-

, valves _are open during normal operation. The possibility of. inadvertent: closure

.of the isolation valves is= eliminated by disconnecting the power during normal

• operation. as the valves require no movement to. fulfill their1 safety function.-

The testing requirement that the valves open upon generation'of an Engineered 1

- Safeguards . Signal is not .necessary since the~ valves are kept open during:

normal operation. : The testing of the automatic actuation feature 'of these ~

isolation valves is not required as .this feature is not .used during. plant operation above 1000 psig or for any other safety function.. The proposed amendment removes an unnecessary specification and does not adversely affect plant' safety.

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JAttachment 3 Analysis of Significant' Hazards Consideration 1

-As; required byL10CFR50.91, this: analysis prov' ides aJdetermination that' S the proposed amendmentL of the Technical: Specifications 'does 'not . involve significant hazards ~ consideration as defined by~10CFR50.92.

The testing requirement-for the automatic actuation feature of-the isolation

' valves on the cold . leg accumulator . discharge lines -is-~not necessary as' these valves are kept open during normal operation of )the plant. : The-automatic

actuation. feature isinot required to perform any safety 1 function during normal Joperation or=under accident conditions.

4 The operability of the automatic' actuation feature is only necessary when

- its operability-is being tested. The: proposed amendment deletes the testing

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requirement for the automatic actuation. feature as the' feature is not necessary ,

and fulfills no-safety function.

~The-proposed amendment would not:

1) _-involve a significant increase in the probability or consequences of an accident previously evaluated; or.

2) create the possibility of_a new or different kind of accident from any accident previously evaluated; or

3) involve a significant reduction in a margin of safety.

Based upon the preceding analysis, Duke Power Company concludes that the

' proposed amendment does not involve a significant hazards consideration.-

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