Text

Proposed Tech Spec 3/4.3.7.4 Adding Suppression Pool Water Level & Water Temp to Remote Shutdown Monitoring Instrumentation
	ML20116C509
Person / Time
Site:	LaSalle
Issue date:	04/18/1985
From:	; COMMONWEALTH EDISON CO.
To:	;
Shared Package
ML20116C496	List: ML20116C495; ML20116C509;
References
	9992N, NUDOCS 8504290026
	Download: ML20116C509 (8)
	v • d • e

e TECHNICAL SPECIFICATION CHANGE REQUEST LASALLE COUNTY-STATION UNITS 1 and 2

SUBJECT:

Addition of suppression pool water level and water temperature to the remote shutdown monitoring instrumentation Technical Specification 3/4.3.7.4.

BACKGROUND: LaSalle County Station has committed (Reference (a)) and is required by Reference (b) for Unit 2, to install electrically independent suppression pool water level and water temperature monitoring instrumentation at the remote shutdown panel for each unit. These instruments will be installed prior to startup after the first refueling outage of each unit.

DISCUSSION: The purpose of the instruments is to assess the status of the suppression pool heat sink by monitoring its water level and temperature in the event shutdown from outside the control room is required. There will be one channel each provided for suppression pool level and suppression pool temperature for each unit. These instruments will be periodically checked (monthly channel check) and calibrated (refuel calibration) to assure that the instrumentation-is operable. The attached marked up pages incorporate the changes indicated above.

Since instrumentation which is electrically independent of 1 the control room is not installed in either unit at this time, these Technical Specification changes must not become effective until the required instrumentation is installed or at the first refueling outage on each unit.

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. REMOTE SHUTDOWN MONITORING INSTRUMENTATION LIMITING CONDITION FOR OPERATION 3.3.7.4 The remote shutdown monitoring instrumentation channels shown in Table 3.3.7.4-1 shall be OPERABLE with readouts displayed in the remote shutdown panel external to the control room.

APPLICABILITY: OPERATIONAL CONDITIONS 1 and 2.

ACTION:

a. With the n. umber of OPERABLE remote shutdown monitoring instrumentation channels less than required by Table 3.3.7.4-1, restore the inoperable channel (s) to OPERABLE status within 7 days or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

b. The provisions of Specification 3.0.4 are not applicable.

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4.3.7.4 Each of the above required remote shutdown monitoring instrumentation channels shall be demonstrated OPERABLE by performance of the CHANNEL CHECK and CHANNEL CALIBRATION operations at the frequencies shown in Table 4.3.7.4-1.

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INSTRUMENTATION REMOTE SHUTDOWN MONITORING INSTRUMENTATION ,

LIMITING CONDITION FOR OPERATION 3.3.7.4 The remote shutdown monitoring instrumentation channels shown in

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APPLICABILITY: OPERATIONAL CONDITIONS I and 2.

ACTION:

a. With the number of OPERABLE remote shutdown monito, ring instrumentation channels less than required by Table 3.3.7.4-1, restore tha inoperable channel (s) to OPERABLE status within 7 days or be in at least NOT .

SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

b. The provisions of Specification 3.0.4 are not applicable.

<{i SURVEILLANCE REQUIREMENTS 4.3.7.4 Each of the above required remote shutdown monitoring instrumentation channels'shall be demonstrated OPERABLE by performance of the CHANNEL CHECK and CHANNEL CALIBRATION operations at the frequencies shown in Table 4.3.7.4-1.

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ATTACHENT B SIGNIFICANT HAZARDS CONSIDERATION Commonwealth Edison has evaluated the proposed Technical Specification Amendment and determined that it does not represent a significant hazards consideration. Based on the criteria for defining a significant hazards consideration established in 10 CFR 50.92, operation of LaSalle County Station Unit 1 or Unit 2 accordance with the proposed amendment will not:

1) Involve a significant increase in the probability or consequences of an accident previously evaluated or create the possibility of a new or different kind of accident from any previously evaluated because this change only adds additional instrumentation. This added instrumentation assures that operable instruments will be available if needed.

2) Involve a significant reduction in the margin of safety because the added instrumentation will increase the margin of safety by requiring that remedial actions be taken if the instrumentation becomes inoperable for any reason.

Based on the preceding discussion, it is concluded that the proposed system change clearly falls within all acceptable criteria with respect to the systein or component, the consequences of previously evaluated accidents will not be increased and the margin of safety will not be decreased.

Therefore, based on the guidance provided in the Federal Registar and the criteria established in 10 CFR 50.92(e), the proposed change does not constitute a significant hazards consideration.

9992N

ML20116C509

Text

SUBJECT:

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