ML20091L388

Application for Amends to Licenses DPR-42 & DPR-60,changing ESF Equipment Surveillance Frequency Intervals from Monthly to Quarterly,Per ASME Code Section IX Requirements for Inservice Testing Program

ML20091L388
Person / Time
Site:	Prairie Island
Issue date:	01/21/1992
From:	Parker T NORTHERN STATES POWER CO.
To:
Shared Package
ML20091L375	List: ML20091L373 ML20091L388 ML20091L399
References
NUDOCS 9201280032
Download: ML20091L388 (6)

Text

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e e UNITED STATES NUCLEAR REGUIATORY COMMISSION NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR CENERATING PLANT DOCEET NO. 50 282 50 306 REQUEST POR AMENDMENT .

OPERATING LICENSES DPR 42 ANO t0 LICENSE AMENDMENT REQUEST DATED Jai. ary 21, 1992 Northern States Power Company, a Minnesota corporation, requests authorization for changes to Appendix A of the Prairie Island Operating License as shoo n the attachments labeled Exhibits A, B and C. Exhibit A describes the proposed changes, describes the reasons for the changes. and contains a significant hazards evaluation. Exhibit B and C are coptes of the Prairie Island Technical Specifications incorporatina the proposed changes.

This letter contains no restricted or other defense information.

NORTHERN STATES 4 wet COMPANY by  ; MlaA/IT<-s Thomas M Parker Manager Nuclear Support Services on this d day o f uM4- /4 f.f> before me a notary public in and for said County, pgfsonallyllippeared Thomas M Parker, Manager Nuclear Support Services, and being first duly sworn acknecledged that he is authorized to execute this document on behalf of Northern States Power Company, that he knows the contents thereof, and that tot he best of his knowledge, information, and belief the statements made in it are true an that it is not interposed for delay.

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Exhibit A i PRAIRIE ISLAND NUCLEAR CENERATINC PLANT b

License Amendment Request dated January 21, 1992 Evaluation of Proposed Changes to the Technical Specifications for Opereting Licenses DPR 42 and 60 Pursuant to 10 CFR Part 50, Section 50.59 and 50.90, the holders of Operating Licenses DPR 42 and 60 request the following change:

Erggpsed Change Change the surveillance frequencies for the following pumps and valves to that ,

required by the Inservice Testing Program:

1. The safety inspection pumps, residual heat removal pumps and ,

containment spray pumps,

2. The. boric acid tank valves,

3. The spray chemical. additive tank valves, *

4. The actuation circuits for the Cooling Water System valves, and

5. The auxiliary feedwater valves.

The periodic test for the steam turbine driven auxiliary feedwater pump is proposed to be changed from yearly to once a refueling shutdown. '

The Bases are being updated to as appropriate for the changes described above.

Reason for the Changg  ;

The equipment listed above currently is required to be tested onco each month.

The ASME Code Section XI, Inservice Testing Program specifies quarterly. l testing for the above equipment. The Standard Technical Specifications require this equipment to be tested por the Inservice Testing Program.

We would like to have the option to test this equipment quarterly. This would

-increase the time between surveillance testing from monthly to quarterly.

.This will cause less frequent testing and reduce the equipment-failures .

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. associated with periodic starts and stops. This increase in surveillance frequency interval can have a negative effe9t on equipment availability. The longer time between tests can cause non operational' equipment failures

(failures that occur when the piece of equipment is not operating to exist

!. longer before identification. ,

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Exhibit A January 21, 1992 ,,

Page 2 A comparison between the associated Prainte Island Technical Specifications and the Standard Technical Specifications is shown in Table 1.

The first column identifies the current Prairie Island Technical specification testing frequency and section number.

The second column identifies the St.andard Technical Specification testing frequency and section number. Sec't. ion 4,0.5 refers to the Inservice Testing program. Several items 16entified in the Prairie Island Technical Specifications do not have specific surveillance frequencies specified in the Standard Technical SpecificatSons. This is noted in the table by "Not specified." In these cases, Section 4.0.5 still applies to the testing of this equipment.

The third column identifies the proposed changes.

The-fourth column identifies the current Prairic Island allowed out of service tiue and section numbe4r.

The fifth column identifies the Standard Technical Specification allowed out of service time and section number.

If column five is more restrictive than column four, the frairie Island allowed out of service' time should be adjusted. As shown in column six no changes are required.

Since the proposed curveillance frequencies and allowed out of service timos are consistent with the surveillance frequencies and allowed out of scivace times in the Stahaard Technical Specifications, these changes conform to NRC policy.

The change.to the full flow Dest of the Steam Turbine-driven Auxiliary

-feedwater pump will be consintent with the requirements for the motor driven pumps. This test should not be done more frequently due to the thermal shock to the auxiliary feedwater l'ines (See Prairie Island Inservice Testing Program, Requests for Relief, Section 1.5-9, AF-16-1, 2 and AF-15-1, 2, 3, 4).

This change is consistent with the testing roc.uired by the Inservice Testing Program.

Determination of Sienifirant Hazards Considerations The pronosed changes to the Operating License has been evaluated to determine whether it constitutes a significant hazards consideration as required by 10 CFR Part 50, Section 50.91 using the standards provided in So '. ion 50.92.

This analysis is provided below:

1. The proposed amendment will not involve a significant increase in the probability or consequences of an accident previously evaluated.

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Exhibit A

January 21, 1992 Page 3 a

The decrease in the number of equipment operational transients will 1

. increase reliability more than the delay in problem identification, The net _ sffect of this change will have a positive effect on equipment avatlability. These changes are consistent with Standard Technical Specifications. Therefore, these changes will not effect the probability or consequences of previously analyzed accidents.

2. - The proposed amendment will not create the possibility of a new or ,

different kind of accident frem any accident previously analyzed, e These changes only affece the eau.pment testing frequency, and therefore will not creare the possib - ' .f a new kind of accident or different

_ kind of_acciden.

3, The proposed amendment will not involve a significant reduction in the

margin. of , safety.

These changes will improve the performance of equipment and are intended to redece. the, potential for equipment failures due to_ unnecessary resting,-

No- safety margins will be affected. ,

-Based the.reasens discussed above, we have concluded that the proposed changes do not involve a significant hazards consideration.

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- January 21, 1992

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- TABLE 1 Equipment ' Column 1: Column 2: Cotten 3: Column 4: . Cotteet 5: STS' Col. 6: ,

Existing Sury STS Surveillance: Proposed Existing Attomed out of' Attowed out of Service Change to  ;

Requirement / Requirement / Surveillance Service Tlee/ Location Time / Location Attomed Out Location- Location Requirement- of Service 1 Time needed?

I SI, RWR, CS ptmps Monthly / Per 4.0.5/. Per 4.2 - 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> / 3.3.A.2.a. . 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> / 3.5.2.A, no change 4.5.8.1.s 4.5.2.f, 4.6.2.1.b 3.3.A.2.b, 3.3.8.2.b 3.5.2.A, 3 2.1 (Dust) moeded Boric Acid Tank Monthly /- not specified/, Per 4.2: 1 valve 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> / 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for e train /. No change Valves' 4.5.8.3.c 4.5.4 ' 3.3.A.2.d 3.5.2.a meeded j t

spray Cheef6at Monthly / mot specified/ Per 4.2 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> / 3.3.a.2.b 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> / 3.6.2.1 No change Additive Tank- 4.5.8.3.d 4.6.2 (Duel) , (Dust): meeded valves cooling Water Monthly / mot specified/ Per 4.2 72 hocrs theeders)/ 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> (train)/ 3.7.4 no change t System valves 4.5.8.3.e 4.7.4 3.3.0.2.c needed 4

Auxiliary FW Pump Monthly /; Not specified/1 Per 4.2' 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> (ptmp)/ 3.4.9.2 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> / 3.7.L 2.a no change '!

Discharge '5_tves 4.8.A.3 and 4 4.7.1.2.1 meeded k

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-- J anuary 21,-1992-Page 5 Environmental Assessment

.-This license amendtnent request does not change efficent types or total

- effluent _arnounts nor does it involve an increase in power level. The changes-n are administrativo in nature. Therefore, this amendment will not result in any environmental impact, n:

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