ML20044F549

License Change Request 93-13 to License NPF-57,revising SRs of TS 4.4.1.2, Reactor Coolant Recirculation Sys Jet Pumps, Per GE SILs 330 & 517

ML20044F549
Person / Time
Site:	Hope Creek
Issue date:	05/18/1993
From:	Hagan J Public Service Enterprise Group
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20044F550	List: ML20044F549 ML20044F554
References
NLR-N93067, NUDOCS 9305280242
Download: ML20044F549 (9)

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O PSEG Public Service Electric and Gas Company P.O. Box 236 Hancocks Bridge, New Jersey 08038 Nuclear Department NLR-N93067 MAY 181993 tCR 93 13 United States Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 Gentlemen:

REQUEST FOR LICENSE AMENDMENT j HOPE CREEK GENERATING STATION FACILITY OPERATING LICENSE NO. NPF-57 DOCKET NO. 50-354 In accordance with the requirements of 10CFR50.90, Public Service Electric and Gas Company (PSE&G) hereby submits a j request for amendment of Facility Operating License NPF-57 '

for the Hope Creek Generating Station. This amendment request would revise the Technical Specification surveillance requirements for the Reactor Coolant Recirculation System jet pumps. These recommended changes are consistent with General Electric SILs 330 and 517.

A description of the requested amendment, supporting information and analyses for the change and the basis for a no significant hazards consideration determination are provided in Attachment 1. The Technical Specification pages affected by the proposed change are marked-up in Attachment 2.

Pursuant to the requirements of 10CFR50.91(b) (1) , PSE&G has provided a copy of this amendment request to the State of New Jersey.

Upon NRC approval of the proposed change, PSE&G requests that the amendment be made ef fective upon issuance, but implementable within 60 days to provide sufficient time for associated administrative activities.

Should you have any questions regarding this request, please do not hesitate to contact us.

Sincer y,

. J. afan Vic President -

Attachments Affidavit 9305280242 930518 s l

ADDCK 05000354 PDR -

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. MAY 181993 Document Control Desk NLR-N93067 C Mr. T. T. Martin, Administrator - Region I U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mr. S. Dembek, Licensing Project Manager U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Rockville, MD 20852 Mr. T. P. Johnson (SO9) ,

USNRC Senior Resident Inspector Mr. Kent Tosch, M anager, IV NJ Department of Environmental Protection Division of Environmental Quality Bureau of Nuclear Engineering CN 415 Trenton, NJ 08625

s REF: NLR-N93067 L

STATE OF NEW JERSEY )

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COUNTY OF SALEM )

J. Hagan, being duly sworn according to law deposes and says:

l I am Vice President - Nuclear Operations of Public Service Electric and Gas Company, and as such, I find the matters set forth in the above referenced letter, concerning the Hope Creek Generating Station, are true to the best of my knowledge, l information and belief.

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Subscribed and Sworn to before me this /7 day of Ml6LL[ , 1993 l

\L n bl Lb i i I QLL'lt NotaryPubldc'$fNewJersey KIMBERLYJO BROWN 810TARYPUBUC OF NEWJERSEY

% Commhnn Erpires April 2h 1998 My Commission expires on

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.s LCR 93-13 NLR-N93067-ATTACHMENT 1 PROPOSED TECHNICAL SPECIFICATION AND-BASES CHANGE I

REQUEST FOR LICENSE AMENDMENT HOPE CREEK GENERATING STATION FACILITY OPERATING LICENSE NO. NPF-57 DOCKET NO. 50-354 l

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, LCR 93-13 [

NLR-N93067 '

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I. Description of Change [

This amendment request proposes that existing Surveillance  ;

Requirements of Technical Specification 4.4.1.2, Reactor  !

Coolant Recirculation System Jet Pumps, be revised such j that: 1

- The acceptance criteria for the indicated diffuser-to-lower plenum differential pressure of any individual jet l pump has been increased from 10% to 20% from established I

patterns. This change is applicable to-both two loop and single loop operation. j i

- During single loop operation, the surveillance requirement '

to demonstrate operability of the jet pumps at least once  !

every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> has been clarified to be applicable only to  :

the jet pumps for the operating loop.  !

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- The footnote (*) associated with Technical Specification {

4.4.1.2 that requires the gathering of baseline data for two  ;

loop or single loop operation during startup following any i refueling outage is proposed to be deleted.  ;

t II. Reason for the Proposed Chance

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t Increasing the acceptable limit for the indicated diffuser- j to-lower plenum differential pressure of any individual jet .

pump from 10% to 20% for both two loop and single loop l operation is consistent with the recommendations of General Electric SIL 330. GE SIL 330 recommends a value of 20% due  !

to the turbulence in the jet pump diffuser where the flow l measurement pressure tap is located.

During single loop operation, the surveillance requirement to demonstrate operability of the jet pumps at least once every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> has been clarified to be applicable only to the jet pumps for the operating loop. The Surveillance Requirement is to be performed only when the loop has forced -l recirculation flow which is necessary to detect significant 3 degradation in jet pump performance. Without forced flow, l the inactive jet pump diffuser-to-lower plenum D/P is too  ;

low a value causing difficulty in satisfying the surveillance requirements. This proposed change is consistent with tne recommendations of General Electric SIL 517. l Deletion of the footnote (*) associated with Technical {

Specification 4.4.1.2 that requires the gathering of l baseline data for two loop or single loop operation during i startup following any refueling outage is proposed. This I

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LCR 33-13 NLR-N93067 proposed amendment would eliminate the requirement to trip and restart the recirculation pumps at power during plant startup. Baseline data will continue to be collected during startup following a refueling outage in accordance with plant operating procedures for two loop operation. Single loop operation data will not be collected during startup following a refueling outage, but will be collected the first time single loop operation is entered during an operating cycle.

III. Justification for the Proposed Change Technical Specification Surveillance Requirement 4.4.1.2 requires verification of the integrity of the jet pumps in two loop and single loop recirculation pump operation. The bases for this Surveillance Requirement is to ensure that the core can be reflooded to about two thirds of the core height following a Design Basis Loss of Coolant Accident (LOCA). The requirement ensures that the removable portion of the jet pump between the top of the internal riser and the diffuser is intact. General Electric SIL 330 indicates that surveillance of the jet pumps will provide a warning several days in advance of possible jet pump disassembly due to lock plate saddle fatigue. Jet pump performance degradation could adversely affect the water level in the core during the reflood phase of a LOCA as well as the blowdown flow during a LOCA.

Increasing the acceptance criteria from 10% to 20% for the diffuser-to-lower plenum differential pressure of any individual jet pump is described in-General. Electric SIL 330. Due to the turbulence in the jet pump diffuser where the flow measurement pressure tap is located, the differential pressure signal (D/P) is extremely noisy when the pump is in operation. Attempts have been made to. filter the noise in the differential pressure instrumentation.

However, some noise is still transmitted causing constant motion of the individual jet pump D/P indicators.

Therefore, GE SIL 330 recommends a criteria of 20%.when measuring diffuser-to-lower plenum D/P.

During single recirculation loop operation, the jet pumps are required to be demonstrated OPERABLE at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. This amendment proposes to' clarify that surveillance testing of the jet pumps in the operating loop only will be performed during single loop operation. The Surveillance Requirement acceptance criteria was developed to detect significant degradation in jet pump performance that precedes' jet pump failure. During single loop operation, the stresses applied to the jet pump beam that holds the removable portion of jet pump in place is much d

LCR 93-13 NLR-N93067 less when the jet pumps are inactive than when the. pumps are operating. If the jet pump was found operable in accordance with the criteria of Technical Specification Surveillance Requirement 4.4.1.2 before entering single loop operation, degradation of the jet pumps when the loop is inactive is considered unlikely. This surveillance can only be performed when forced recirculation loop flow is present.

Without forced flow, the inactive jet pump diffuser-to-lower plenum D/P is too low a value causing difficulty in satisfying the surveillance requirement. In addition, surveillance testing of the inactive loop is not considered necessary in accordance with the recommendations of General Electric SIL 517.

The footnote for Technical Specification 4.4.1.2 is proposed to be deleted. The requirement for the performance of baseline data acquisition for two loop operation will be controlled administratively in accordance with plant operating procedures. The baseline data for two loop operation will be collected as before during startup following a refueling outage. This baseline data will be an indication of changes in core resistance, pump hydraulic performance, jet pump fouling and resistance changes in the bottom head, separators and downcomer annulus.

Single loop operation baseline data will not be collected during startup following a refueling outage. Single loop data will be collected the first time single loop operation is initiated during a fuel cycle. New baseline data will then be collected for the operating loop. This proposed amendment would eliminate the requirement to trip and restart the recirculation pumps at power during plant startup. Baseline data collected during previous operating cycles will initially be utilized to confirm operability.in accordance with the Surveillance Requirement acceptance criteria. Previous operating cycle baseline data will be utilized until new baseline. data analysis can be completed.

This data, as well as baseline data taken for_two loop operation and surveillances performed during two loop operation to detect possible jet pump degradation, will provide the same degree of confidence that jet pump integrity will be maintained. A review of previous operating cycle baseline data for single loop operation has shown very little change in the D/P from cycle to cycle.

IV. Sionificant Hazards Consideration PSE&G has, pursuant to 10CFR50.92,-reviewed the proposed changes to determine whether our request involves a significant hazards consideration. We have determined that

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LCR 93-13 NLR-N93067 operation of Hope Creek Generating Station in accordance with the proposed change:

1. Will not involve a significant increase in the probability or consequences of an accident or malfunction of equipment important to safety previously evaluated.

Increasing the acceptance criteria from 10% to 20% for the dif fuser-to-lower plenum D/P of any individual jet pump is consistent with the recommendations of GE SIL 330.

This criterion, along with the other criteria of Surveillance Requirement 4.4.1.2, will ensure that possible jet pump degradation is detected.

Degradation of an inactive jet pump during single loop operation is not considered credible due to significantly reduced stresses applied to the jet pump beam. Surveillance testing of the operating jet pumps and any surveillance testing completed prior to removing a recirculation loop from operation will continue to ensure that jet pump integrity is maintained. This will ensure that the core can be reflooded to a level of two thirds of the core height following a LOCA.

Baseline data collection will be performed when single loop operation is entered for the first time during an operating cycle. Previous operating cycle baseline data for single loop operation will be utilized until new baseline data analysis can be completed. This previous data, along with ,

surveillance results taken during two loop operation will provide the same degree of confidence that jet pump integrity is maintained. This will ensure that the core can be reflooded to a level of two thirds of the core height following a LOCA.

Therefore, the operation of Hope Creek Generating Station in accordance with the proposed amendment will not involve a significant increase in the probability or consequences of an accident or malfunction of equipment important to safety previously evaluated. j

2. Will not create the possibility of a new or different kind of accident from any previously evaluated.

The proposed amendment to the jet pump surveillance requiretuents will continue to ensure that any significant jet pump degradation will be detected prior to jet pump failure. Failure of an inactive jet pump located in an inactive recirculation loop during single loop operation is not considered credible as discussed above. Therefore, the

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NLR-N93067 j possibility of a new or different kind of accident previously evaluated is not created.

3. Will not involve a significant reduction in~a margin of .

Safety.

The p'oposed amendment to the jet pump surveillance  ;

reem'rements will continue to ensure that any significant jet pump degradation will be detected prior to jet pump failure. Jet pump integrity will be maintained thereby ,

assuring the ability to allow reflooding of the core to a  :

level of two-thirds core height during the reflood phase of a LOCA as well as maintain the assumed blowdown flow during l a LOCA.

Therefore, the proposed change does not involve a significant reduction in a margin of safety. j Conclusion 1 Based upon the above, we have determined thac the proposed amendment does not involve a Significant Hazards Consideration.  !

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