RBG-26571, Application for Amend to License NPF-47,revising OL to Implement Recommendations of Rev 2 of App II of Tdi Diesel Generator Owners Group Design Review & Quality Revalidation (Dr/Qr) Rept Submitted on 860501.Proposed Revs Encl

Application for Amend to License NPF-47,revising OL to Implement Recommendations of Rev 2 of App II of Tdi Diesel Generator Owners Group Design Review & Quality Revalidation (Dr/Qr) Rept Submitted on 860501.Proposed Revs Encl

ML20238E444
Person / Time
Site:	River Bend
Issue date:	09/08/1987
From:	Deddens J GULF STATES UTILITIES CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
RBG-26571, NUDOCS 8709140351
Download: ML20238E444 (11)

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GULF STATES UTILITIES COMPANY filVI R lif ND $1 ATION PC$f Of FICE BOX 220 ' - ST FRANCISVlu.E. LOU 163ANA 707/6 -

. ARE A CODE SO4 C3$ 6094 346 Bfi61 September l8,.1987' RBG- 26571 1 File Nos.:G9.5, C9.25.'1.4'.

l U. S. Nuclear Regulatory Commission Document Control Desk, . J Washington, D.C. 20555 River Bend' Station.- Unit 1 Docket.No. 50-458 As requested' by ;your . staff, Gulf States Utilities Company (GSU) is providing'the' attached proposed revisions to the River -Bend Station:

(RBS) Operating ' License as . referenced .by your : letter to Mr. J.;C.

Deddens dated April 1, 1987. Attachment 3 to the. RBS Operating License NPF-47, Item 7, currently ' specifies. that operation beyond the first.

refueling outage is subject . to NRC Staff approval based 'on ' ' the s Staff's final review of the (TDI Diesel' Generator) Owners Group. generic findings .

and the overall design review and quality' revalidation program" at :RBS.

GSU- proposes to implement.the recommendations'of Revision 2 of' Appendix II of the.TDI Diesel Generator Owners Group Design' Review and :Qualityi Revalidation. (DR/QR) Report submitted : May 1, -1986- as reflected in'-

NUREG-1216. The Attachment contains..the' justifications;'and proposed ~

revisions to the RBS Operating : License. This. submittal: supplements- j GSU's previous'submittals dated' August,4, 1986,. August 15, .1986- and' September 26, 1986~ (reference REG-24147, RBC-24277 and RBG-24487, respectively). Revisions to GSU's previous submittals are indicated by, j double change bars. Your prompt attention to this application is' appreciated.

Sincerely

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J.'C. Deddens:

Senior Vice' President' 2 River ~ Bend Nuclear Group lh& Q'.

JCD/ EB/ ERG /RJK/DAS/ch

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Attachment '

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l 8709140351 870908 O '

PDR ADDCK 05000458 P PDR .g k1.-

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UNITED. STATES OF AMERICA NUCLEAR REGULATORY COMMISSION

. STATE OF LOUISIANA

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2ARISH OF WEST FELICIANA )

In the Matter of ) Docket No. 50-458 50-459 GULF' STATES UTILITIES COMPANY )

(River Bend Station,-

Unit 1)'

AFFIDAVIT J. C. Deddens, -being duly sworn, atates that he is a Senior Vice President of Gulf States Utilities Company;.that he is authorized on the part of said company to sign and file with the Nuclear Regulatory Commission the ' documents-attached hereto; and- that all such documents are true and correct to the best of his knowledge,. information and.

belief.

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J. C. I[eddens Subscribed and sworn to before me, a' Notary Public in-and for the State and Parish above named, this 2b day of enherbef , 19 M .

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goanW. Middlebbooks Notary Public'in and for-West Feliciana Parish, Louisiana My Commission is.for Life.

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cc: Mr. Robert D. Martin, Regional Administrator U.S. Nuclear Regulatory Commission l Region IV j 611 Ryan Plaza Drive, Suite 1000 {

Arlington, TX 76011 j l

NRC Senior Resident Inspector )

P.O. Box 1051 l St. Francisville. LA 70775 l Mr. William H. Spell, Administrator Nuclear Energy Division I Louisiana Department of I Environmental Quality P.O. Box 1469f' Baton Rouge,IA 70898

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ATTACHMENT i GULF STATES UTILITIES COMPANY RIVER BEND STATION DOCKET 50-458/ LICENSE NO. NPF-47 TDI DIESEL ENGINES REQUIREMENTS 1

LICENSING DOCUMENT INVOLVED: OPERATING LICENSE NPF-47  !

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ITEM: Attachment 3 l REASON FOR REQUEST Attachment 3 to the River Bend Station (RBS) Operating License NPF-47, Item 7 specifies that operation beyond the first refueling outage j (currently scheduled to begin September 15, 1987) is subject to NRC j Staff approval . based on the Staff's final review of the (TDI Diesel Generator) Owners Group generic findings and the overall design review and quality revalidation program at RBS. Gulf States Utilities Company proposes to implement the recommendations of revision 2 of Appendix II of the TDI Diesel Generator Owners Group Design Review and Quality Revalidation (DR/QR) Report submitted May 1, 1986 as reflected in NUREC-1216 " Safety Evaluation Report Related to the Operability and- 1 l Reliability of Emergency Diesel Generators Manufactured by Transamerica l Delaval Inc."

DESCRIPTION The change being requested herein concerns the requirements of Attachment 3 to NPF-47, "TDI Diesel Engines Requirements". GSU agreed to implement the Maintenance and Surveillance (M/S) program identified in Appendix II of the River Bend DR/QR Report, Revision 1 by letter

, dated May 17, 1985 (reference RBG-21026). Appendix II of the DR/QR I

Report presents a schedule of maintenance and surveillance procedures recommended by the owners groups for implementation at RBS. The NRC Staff's review of this program is documented in Supplement 3 to the RBS Safety Evaluation Report.

1 Following industry, Pacific Northwest Laboratories (PNL) and the NRC Staff review, revision 2 of Appendix II of the TDI Owners Group DR/QR Report was developed. This revision was submitted for NRC Staff review on May 1, 1986. The results of the NRC Staff's review of Revision 2 is documented in NUREG-1216. This requested Operating License Amendment merely incorporates the requirements of revision 2 as reflected in the NRC Staffs generic SER NUREG-1216.

NO SIGNIFICANT RAZARDS CONSIDERATION As discussed in 10CFR50.92, the following determinations are provided to  :

the NRC Staff in support of "no significant hazards considerations". '

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1. No significant increase in the probability or the consequences of an l accident.previously evaluated results from this change because:  ;;

I l' The Transamerica Delaval Inc. (TDI) Owners Group DR/QR Report requires inspections that are more thorough than the inspections currently being performed in accordance with the manufacturers recommendations. GSU's commitment to the DR/QR Report .is designed to increase the reliability of the Division I 'and II diesel l

generators. Implementing revision 2 of' Appendix II of the TDI DR/QR l report will increase the reliability of the diesel generators at RBS. Furthermore, this change is within the existing safety

. analysis provided in the RBS Final Safety Analysis Report (FSAR).

Thus, there is no increase in the probability or consequences of any l accident previously evaluated. .

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2. This change would not create the possibility of a new or different i kind of accident from any accident previously evaluated because: l The change clarifies the existing commitments presently being l adhered to. The River Bend Station Unit 1 Facility Operating License (NPF-47) currently contains a condition that GSU shall implement the TDI requirements as incorporated within the license.

by implementing the recommendations of Revision 2 of Appendix II of the TDI DR/QR. Report, GSU will be implementing a program that has ,

undergone extensive industry and regulatory review (reference '

NUREC-1216 dated July, 1986). Implementing revision 2 of Appendix II of the TDI DR/QR report will increase the reliability of the diesel generators at RBS.

Thus no new or different kind of accident scenardo is introduced for .,

any accident previously evaluated. I

3. This change would not involve a significant reduction in the margin of safety because:

The change makes the Technical Specifications consistent with the NRC Staff approved program (reference NUREG-1216) which ensures that the design adequacy and manufacturing of the TDI diesel generators for nuclear standby service is within the range normally assumed for diesel engines designed and manufactured in accordance with General Design Criterion (GDC) 17 and 10CFR50, Appendix B. Therefore, this change does not reduce any margin of safety as defined in the Technical Specification Bases.

GSU therefore requests that the requirements of Attachment 3 to NPF-47 be revised to reflect the recommendations of Revision 2 of the River Bend DR/QR Report maintenance and surveillance program as reflected _in NUREG-1216.

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l REVISED OPERATING LICENSE ATTACHMENT i The requested revision is provided in the Enclosure.  !

I SCHEDULE FOR ATTAINING COMPLIANCE j River Bend Station is currently in compliance with the applicable

-Operating License Condition. l l

NOTIFICATION OF STATE PERSONNEL l

A copy of the amendment application and this submittal has been provided to the State of Louisiana, Department of Environmental Quality - Nuclear Energy Division.

ENVIRONMENTAL IMPACT APPRAISAL Revision of this Operating License Attachment does not result in an environmental impact beyond that previously analyzed. Therefore, i approval of this amendment does not result in a significant environment j l impact nor does it change any previous environmental impact statements for River Bend Station.

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ENCLOSURE i

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ATTACHMENT 3 TO-NPF 47 TDI DIESEL ENGINES REQUIREMENTS GSU shall comply with the following requirements related to the TDI diesel engines.

1. Changes to the maintenance and surveillance program for the TDI diesel engines, as identified and approved by the NRC staff' in Supplement 3 to the SER, shall be subject to the provisions of 10 CFR 50.59.  ;

1 The frequency of the major engine overhauls referred to in the license conditions below shall be consistent with Section IV.1. 1

" Overhaul Frequency" in revision 2 of Appendix II of the Design Review / Quality Revalidation report which was transmitted by letter dated May 1, 1986, from J. George, Owners Group, to H. Denton, NRC.

2. Crankshafts shall be inspected as follows:

l SD IB: During the first refueling outage, inspect the fillets and oil holes of the three most heavily loaded crankpin journals (Nos.

5, 6, and 7) with florescent liquid penetrant and ET as appropriate.

SD 1A and IB: During the 'second and third refueling outages, l inspect the fillets and oil holes of two of the three most heavily l

loaded crankpin journals in the manner just mentioned.

SD 1A and IB: At approximate 5 year intervals subsequent to the l third refueling outage, inspect the fillets and oil holes using florescent liquid penetrant and ET as appropriate, of the: a) three I most heavily loaded crankpin journals (Nos. 5, 6, and 7), and b) main journals located between crankpin journals 5, 6, and 7. One j i engine may be inspected at the refueling outage closest to 5 years, '

L and the other engine at the next refueling outage.

l If cracks are found during inspections of crankshafts, this condition shall be reported promptly to the NRC staff and the affected engine shall be considered inoperable. The engine shall not be restored to " operable status" until the proposed disposition and/or corrective actions have been approved by the NRC staff.

l 3. Cylinder blocks shall be inspected for " ligament" cracks,

" stud-to-stud" cracks and " stud-to-end" cracks as defined in a report

• by Failure Analysis Associates. Inc. (FaAA) entitled,

" Design Review of TDI R-4 and RV-4 Series Emergency Diesel Generator Cylinder Blocks" (FaAA report no. FaAA-84-9-11.1) and dated December 1984. (Noted that the FaAA report specifies additional inspections

• This report was transmitted to H. Denton, NRC, from C. L. Ray, Jr.,

TDI Owners Group, by letter dated December 11, 1984.

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h lj 'to be performed 'for blocks with "known" .or " assumed" ligament cracks). The inspection intervals. (i.e., frequency) shall not' exceed the intervals calculated using the cumulative damage. index model in the subject FaAA report. In addition, inspection method

'shall be consistent with or. equivalent to those identified in the subject FaAA report.

! In addition to inspections .specified in the aforementioned FaAA l report, blocks with "known" or " assumed ligament cracks" (as defined in the FaAA report) should be inspected at each refueling outage to

-determine whether or not cracks have initiated on the top surface i exposed by the removal of two or more cylinder heads. This process l .should be repeated over several refueling outages until the. entire block top has been inspected. Liquid-penetrant testing or a

similarly sensitive nondestructive testing technique should be used to detect cracking, and eddy current should be used as appropriate to determine the depth of any cracks discovered.

If inspection reveals cracks in the cylinder blocks between stud holes of adjacent cylinders (" stud-to-stud" cracks) or " stud-to-end"-

cracks, this condition shall be reported promptly to the NRC staff and the affected engine shall be considered inoperable. The engine shall not'be restored to " operable status" until the proposed disposition and/or corrective actions have been approved by the NRC staff.

4. The following air roll test shall be performed as specified below, except when the plant is already in an Action Statement of Technical Specification 3/4.8.1, " Electric Power Systems, A.C. Sources":

The engines shall be rolled over with the airstart system and with the cylinder stopcocks open prior to each planned start, unless that start occurs within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> of a shutdown. The engines shall also be rolled over with the airstart system and with the cylinder stopcocks open after 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, but no more than 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, after engine shutdown and then rolled over once again approximately 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> l after each shutdown. (In the event an engine is removed from l

i service for any reason other than the rolling over procedure prior to expiration of the 8-hour or 24-hour periods noted abcve, that engine need not be rolled over while it is out of service. The licensee shall air roll the engine over with the stopcocks open at the time it is returned to service.) The origin of any water detected in the cylinder must be determined and any cylinder head-which leaks due to a crack shall be replaced. The above air roll test may' be discontinued following the first refueling outage subject to the following conditions:

All cylinder heads are Group III heads (i.e., cast after September 1980).

Quality revalidation inspections, as identified in the Design  ;

Review / Quality ' Revalidation report, have been completed for all cylinder heads.

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Group III heads continue to demonstrate leak free performance. ,

This should be confirmed with TDI before air roll tests are I discontinued. I ll I

5. Thefollowingactgsare required if SD 1A or SD 1B is operated in j excess of 3130 W  : 1 a) For indicated. engine loads in g range of 3130 W to 3200 W j for a period less than twc hours , no additional action shall I be required.  ;

1 b) For indicated engine loads in the range of g30 W to 3200 W j for a period equal to or exceeding two hours , a crankshaft j inspection pursuant to Item d below shall be performed at the j next refueling outage. l 1

c) For indicated engine loads in the r g e of 3200 W to 3500 KW l for a period less than I hour , a crankshaft inspection pursuant to item d below shall be performed for the affected J engine at the next refueling outage, d) For indicated engine loads in the range g 3200 KW to 3500 KW for periods equal to or exceeding one hour and for engine l loads exceeding 3500 KW for any period of time, (1) the engine {

shall be removed from service as soon as safely possible, (2)  ;

the engine shall be declared inoperable, and (3) the crankshaft i shall be inspected. The crankshaft inspection shall include i erankpin journal numbers 5, 6, and 7 (the most heavily loaded) '

and the two main journals in between using . florescent liquid penetrant and eddy current as appropriate.

6. Periodic inspections of the turbocharger shall include the ]

following: l l

The turbocharger thrust bearings should be visually inspected for excessive wear after 40 non-prelubed starts since the previous {

i visual inspection. '

i Turbocharger rotor axial clearance should be measured at- each j refueling outage to verify compliance with TDI/Elliott I specifications. In addition, thrust bearing measurements should j be compared with measurements taken previously to determine a  ;

need for further inspection or. corrective action.  !

(1) Momentary transients (not exceeding 5 seconds) due to changing of '!

bus loads need not be considered as an overload. '

(2) If there are multiple overload events within a given load range since the previous crankshaft inspection, then the time period criterion applies to the total accumulated time in that load range.

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. Spectrographic and ferrographic engine . oil analysis shall be i performed quarterly to provide early evidence of bearing i degradation. Particular attention should be paid to copper level and particulate size, which could signify thrust bearing 'i degradation. (.

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l The nozzle ring components and inlet guide- vanes should be ' .- ,

visually inspected at each refueling outage for missing parts or : > L' parts showing distress on a one-turbocharger-per-refueling-outage ,\

basis. In addition, these inspections should be performed for .

'l all ' turbocharger at each turbocharger overhaul (i.e., at approximately 5-year intervals). If any missing parts or '

distress is noted, the entire ring assembly should be replaced ;

and the subject turbocharger should be reinspected at the next : d refueling outage.

7. Operation beyond the first refueling outage is subject to NRC- staff )

approval based on the staff's final review of the Owners Group  !

generic findings and of the overall design review and quality l revalidation program at River Bend.

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