ML20211P933

Proposed Tech Specs Eliminating Unnecessary Detail from Accident Monitoring Instrumentation Surveillance Requirements

ML20211P933
Person / Time
Site:	LaSalle
Issue date:	10/15/1997
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20211P926	List: ML20211P917 ML20211P933
References
NUDOCS 9710220031
Download: ML20211P933 (8)

Text

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INSTRUMENTATION dM

' [ r DTWA ACCIDEW MONITORING INSTRUMENTATJ01 '

o Changes LINITING CONDITION FOR OPERATION _ _ , _ _ ,.

3.3.7.5 The accident monitoring instrumentatit,r. channels shown in Table 3.3.7.5-1 shall be OPERABLE..

APPLICABILITY: OPERATIONAL CONDITIONS 1 and 2.

ACTION:

With one or more accident monitoring instrumentation channels inoperable, take the ACTION required by Table 3.3.7.5-1.

SURVEILLANCE REOUIREMENTS 4.3.7.5 Eadh of the above requfred accident monitoring instrumentation channels shall be demonstrated OPERABLE by performance of the CHANNEL CHECK and CHANNEL CALIBRATION operations at the frequencies shown in Table 4.3.7.5-1.

9 LA SALLE - UNIT 1 3/4 3-69 '

Amendment No. 19 9710220031 971015 -

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TABLE 4.3.7.5-1 5 '

v. ACCIDENT MONITORING INSTRUNENTATION SURVEILLANCE REQUIREMENTS

? i E CHANNEL CHAIRIEL e IllSTHintiNT CilECK CALIBRATION

!ii 1. Reactor Vessel Pressure M N p .{

• 2. Re actor Vessel Water Level M fi ,

j 3. Suppression Chamber Water Level M R

4. sigepression Chamber Water Temperature M R  !

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5. Suppression Chamber Air' Temperature M R .

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6 primary Containment Pressure M R .

y 7. II ywell Air Temperature M R T 8. Drywell Oxygen Concentration M lt ,

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9. Iirywell flydrogen Concentration Analyzer and Monitor .M

.A 10. I'rinary Containment Gross Gamma Radiation M' . R

11. Safety / Relief Valve Position Indicators M R ,

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12. 11oble Gas Monitor, Main Stack M R I

. 13. :loble Gas Monitor. Standby Gas Treatment System Stack M -

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ACCIDBff WitITORING IltSTmmENTATION ulim . C0 m o.

h gg An01 3.3.7.5 shall be OPERABLE. Ths accident monitoring. instrumentation channels shown in Table 3.3.7.5-1 i

APPLICABILITY: OrdRATIONAL Colem0fts 1 and 2.

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,g With one or more accident annitoring instrumentation channels inoper-able, take the ACTION required by Table 3.3.7.5-1.

SURVEILLANCE umIRBetTS .

4. 3. 7. 5 ^

Each of the above required accident monitoring instrumenta' tion

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< channels shall be demonstrated OPERABLE by performance of the CHANNEL CHECK and CHANNEL CALIBRATI0ft sperations at the frequencies shown in rable 4.3.7.5-1.

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. l ATTACHMENT C SIGN!FICANT HAZARDS CONSIDERATION Cemmonwealth Edison Company (Comed) proposes to revise Appendix A, Teciinletl Specificationa of Facility Operating Licenses NPF 11 and NPF 18, LaSalls County Station Units 1 and 2. The proposed changes include changes to the Technical Specifications (TS) te eliminate unnecessary detail from the Accident Monitoring instrumentation Surveillance Requirements. The TS affected is TS Yable 4.3.7.51, Accident Monitoring instrumentat!on Surveillance Requirements.

Commonwealth Emson has evaluated the proposed Technical Specification Amendment and determined that it does not represent a significant hazards consideration. Based on the criterla for defining a significant hazards consideration established in 10 CFR 50.92, operation of LaSalle County Station Units 1 and 2 in accordance with the proposed amendment will not:

1) Involve a significant increase in the probability or consequences of an accident previously evaluated because:

The drywell'.ydrogen concentration analyzer and monitors are required to be operab!4 by TS 314.7.5, Accident Monitoring Instrumentation. Table 4.3.7.51, Accident Monitoring instrumentation Surveillance Requirements, includes a footnote providing unnecessary details related to the calibration of this specif!c analyzer and monitors. The footnnte provides Information that was determined to put the hydrogen analyzers and monitors outside of the design basis by limiting the range of the Indication to 0% to 4% hydrogen in the drywell. The calibration method is being corre::ted to provide the correct range of 0% to 10%, and requires this note in the TS to be changed or deleted. The footnote is proposed to be deleted from the TS, because it provides unnecessary detall.

Deletion of the footnote will not cause an increase in the probability of an r accident, because this instrumentation is only for accident monitoring instrumentation and thus does not affect accident initiators or assumptions.

C1 l

ATTACHMENT C SIGNIFICANT HAZARDS CONSIDERATION Deletion of the footnote will not change the consequences of an accident previously evaluated, because this detailin the TS does not change the requirement of performing a channel calibration at the specified frequency. In addition, the ability to monitor hydrogen during an accident will not be affected by deletion of the lootnote.

Therefore, this change does not involve an increase in the probability or consequences of an accident previously evaluated.

2) Create the possibility of a new or different kind of accident from any accident previously evaluated because:

This is monitoring Instrumentation only. Deletion of the footnote concerning specifics on how to calibrate this instrumentation will not affect the reliability or failure modes of the drywell hydrogen concentratton analyzer and monitors. Therefore, this change will not create the possibility of a new or alfferent kind of accident from any accident previously evaluated.

3) Inmive a significant reduction in the margin of safety because:

This is monitoring instrumentation only. Deletion of the footnote concerning specifics on how to calibrate this instrumentation will not change the requirement to perform Channel Calibrations at the frequency speciflod in the TS. The details of how to perform a Channel Calibration on the drywell hydrogen concentration analyzer and monitors are located in plant procedures and are in accordance with vendor recommendations.

The TS requirements for redundancy of the instrumentation and the actions to be taken for inoperable Instrumentation are also not affected by the deletion of this footnote.

This change to the level of information regarding this calibration is consistent with the detail for this and other instrumentation in NUREG.

1434, Revision 1, Standard Technical Specifications, General Electric Plants, BWRl6.

Therefore, deletion of footnote

• from TS Table 4.3.7.51 will not involve a reduction in the margin of safety.

C2

ATTACHMENY C SIGNIFICANT HAZARDS CONSIDERATION Guidance has been provided in Final Procedures and Standards on No Significant Hazards Considerations," Final Rule,51 FR 7744, for the application of standards to license change requests for determination of the existence of significant hazards considerations. This document provides examples of amendments which are and are not considered likely to involve significant hazards considerations. These proposed amendments most closely fit the example of a change which either result in some increase to the probability or consequences of a previously analyzed aceldent or may reduce in some way a safety margin, but where the results of the change are clearly within the acceptance criteria with respect to the system or component specified in the Standard Review Plan.

This proposed amendment does not involve a significant relaxation of the criterin used to establish safety limits, a significant relaxation of the bases for the limiting safety system settings or a significant relaxation of the bases for the limiting conditions for operations. Therefore, based on the guidance provided in the Federal Register and the criteria established in 10 CFR 50.92(c), the proposed change does not constitute a significant hazards consideration.

4 C-3

ATTACHMENT D L 'VIRONMENTAL ASSESSMENT STATEMENT APPLICABILITY REVIEW Commonwealth Edison has evalustr,d the proposed amendment against the criterla for identification of licensing and regulatory actions requiring environmental assessment in accordance with 10 CFR Part 51.21. It has been determined that the proposed changes meet the criterla for categorical exclusion as provided for under 10 CFR Part 51.22(c)(9). This conclusion has been determined because the changes requested do not pose significant hazards considerations or do not involve a significant increase in the amounts, and no significant changes in the types of any effluents that may be released off site. Additionally, this request does not involve a significant increase in Individual or cumulative occupational radiation exposure.

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