ML19341B822

Tech Spec Tables 4.3-8 & 4.3-9 for Channel Functional Test

ML19341B822
Person / Time
Site:	Sequoyah
Issue date:	02/23/1981
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML19341B820	List: ML19341B819 ML19341B822
References
NUDOCS 8102270685
Download: ML19341B822 (3)

Text

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ENCLOSURE 1

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-SEQUOYAH NUCLEAR PI;NT UNIT 1

' PROPOSED TECHNICAL SPECIFICATION CHANGE O .

TABLE 4.3-8 (Continued)

TABLE NOTATION Daring liquid additions to the tank. - - - -

(1) tee' 'C' H AsfiELffuNCTIONAL TEST shall also demonstrate that automatic isolation of this pathway and control room alarm annunciation occurs if any of the following conditions exists:

1. Instrument indicates measured levels above the alarm / trip setpoint.

2. Circuit failure.

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(2) The CHANNEL FUNCTIONAL TEST shall also demonstrate that control room alarm annunciation occurs if any of the following conditions exists:

1. Instrument-indicates measured levels above the alarm setpoint.

2. . Circuit failure.

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'(3)- The initial CHANNEL CAL'IBRATION shall .be performed using one or more of the reference standards certified by; the National Bureau of Standards or usir.g standards that have been obthined from suppliers that participate

. in' measurement assurance = activities with NBS. These standards shall

. permit-calibrating the system over its intended range of energy and measurement range. For subsequent CHANNEL CALIBRATION, sources that have been related-to the initial calibration shall be used.

.(4) CHANNEL CHECK shall consist of verifying indication of flow during periods of release. CHANNEL CHECK shall be.made at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> on

' days f on which continuous, periodic, or batch releases are made.

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!  ;.- TABLE 4.3-9 (Continued)

TABLE NOTATION At all times.

During waste gas disposal system operation.

During shield building exhaust system operation.  ;

• • • • During waste gas releases.

.(1) The CHANNEL FUNCTIONAL TEST shall also demonstrate that automatic isolation of this pathway and control room alarm annunciation occurs if any of the following conditions exists:

1. Instrument indicates measured levels above the alarm / trip setpoint.

2. Circuit failure.

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4.

-(2) The. CHANNEL FUNCTIONAL TEST shall also demonstrate that control room

alarm annunciation occurs if any of the following conditions exists:

1. Instrument indicates measured levels above the alarm setpoint.

2. Circuit failure.

, 13. .

4 (3) The initial CHANNEL CALIBRATION shall be performed using one or more of the reference standards ' certified by the National Bureau of Standards or using standards that have been obtained from suppliers that participate

.- . in measurement assurance activities with NBS. These standards'shall

permit calibrating the system over its intended range of energy and measurement range. For subsequent CilANNEL CALIBRATION, sources that have

( been related to the initial calibration shall be used.

(4). The CHANNEL CALIBRATION shall include the use of standard gas samples containing a nominal: -

,1.

One-volume percent hydrogen, balance nitrogen, and.

-2. 'Four volume percent hydrogen, balance nitrogen.

r 5' x(S): The CHANNEL CALIBRATION shall include the use of standard gas samples-containing a nominal: .

1.

' -One volume percent oxygen,. balance nitrogen, and-

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2. ;Four volume percent 3 oxygen, balance nitrogen. '

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ENCLOSURE 2 SEQUOYA!I flUCLEAR PLANT UNIT 1 DESCRIPTION AND JUSTIFICATION FOR PROPOSED CHAllGES TO TECHNICAL SPECIFICATIONS Description of Change The proposed change deletes the channel functional test requirementa related to instrument controls not set in operate mode from Technical Specif1catica 3 3 3.9 (Table 4.3-8 notations 1 & 2) and 3 3 3.10 (Table 4.3-9 notations 1 & 2). The revised technical specifications should read as shown on Enclosure 1.

Justification for Change Design of the radiation monitoring system does not allow the channels to be set in any mode other than the operate mode. The control switch is spring returned to the operate position. This design feature is checked in the channel functional test.

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