ML20154R013

Proposed Tech Specs,Revising Table of Primary Containment Isolation Valves to Identify New Excess Flow Check Valves Being Installed During Second Refuel Outage.Valves Being Added as Part of Mod to Improve Reactor Water Level

ML20154R013
Person / Time
Site:	LaSalle
Issue date:	05/23/1988
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20154R011	List: ML20154R007 ML20154R013
References
4677K, NUDOCS 8806070190
Download: ML20154R013 (4)

Text

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ATTAQ9ENT B TECHNICAL SPECIPICATION CHANGE REQUEST LASALLE COUNTY STATION UNIT 1 PROPOSED CHANGES TO APPENDIX A REVISED PAGES:

NPF-11: 6-31 6-31a (new)-

4677K 8806070190 880523 PDR ADOCK 05000373 P

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w TABLE 3.6.3-1 (Continued)

E PRIMARY CONTAINMENT ISOLATION VALVES 5

E VALVE FUNCTION AND NUMBER h

Excess Flow Check ValvesI9) (Continued) h 46.

IE12-F359A, B 47.

IE12-F319 48.

1E12-F317 49.

IE12-F360A, B 50.

1E21-F304 51.

1E22-F304 52.

IE22-F341 S3.

IE22-F342 m2 54.

1833-F319A, B 55.

1833-F317A, B 56.

1833-F313A, B, C, 0 57.

1833-F311A, B, C, D s

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1833-F315A, B, C, D 59.

IB33-F301A, B 60.

1833-F307A, B, C, D 61.

1833-F305A, B, C, D

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1821-F459 69.

1821-F461 70.

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ATTACHMENT C L'

TECHNICAL SPECIFICATION CHANGE REOUEST LASALLE COUNTY STATION UNIT 1 SIGNIFICANT HAZARDS CONSIDERATION I

The proposed operating Licensing / Technical Specification Amendment has been evaluated to determine whether or not there is a Significa.t Hazards Consideration based on the questions provided by 10 CFR 50.92 requirements.

In addition, the evaluation was measured against the criteria used to establish safety limits, the limiting safety system settings, and the limiting conditions for operations. The results of the evaluation are presented below.

1.

Does the proposed amendment involve a significant increase in the probability or consequences of an accident previously evaluated?

No, this change is administrative, adding two new valves to Technical Specification Table 3.6.3-1.

The modification that installed these new instrument lines and excess flow check valves does not require a Technical Specification change.

The design of these new valves, meets the requirements listed in UFSAR Section 6.2.4.

The additional containment penetration was designed in accordance with General Design Criteria 55 and Regulatory Guide 1.11.

This additional instrument line does not significantly increase the consequences of any postulated accident.

2.

Does the proposed amendment create the possibility of a new or different kind of accident from any accident previousl/ evaluated?

No, instrument line failure has already been evaluated.

3.

Does the proposed amendment involve a significant reduction in the margin of safety?

No, the instrument line meets regulatory requirements to ensure that the margin of safety is maintained.

Based on this preceding discussion, it is concluded that the proposed amendment does not involve a significant increase in the probability of a new or different kind of accident from any accident previously evaluated; nor involve a significant reduction in the required margin of safety. Therefore, based on the guidance provided in the Federal register and the criteria established in 10 CFR 50.92(c) the proposed amendment involves no significant hazards consideration.

4677K L-