ML19240C840
| ML19240C840 | |
| Person / Time | |
|---|---|
| Issue date: | 06/02/1981 |
| From: | Rubenstein L Office of Nuclear Reactor Regulation |
| To: | Taylor J BABCOCK & WILCOX CO. |
| References | |
| CF-350, NUDOCS 8107060062 | |
| Download: ML19240C840 (4) | |
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JUN 2 1991 Hr. J. H. Taylor Manager, Licensing Babcock & liilcox Company Power Generation Group P. O. Box 1260 Lynchburg, Ytrointa 24505
Dear Mr. Taylor:
Durino r* cent months we have had a series of neetings concerning the potential for extended (higher than the traditional 28,000 to 33,000 mwd /t) burnup of LVR fuel. We have used these meetings to discuss the basis for operation of fuel to extended burnups, including available operating data, analytical models, and test programs concerning burnup-related fuel performance phenomena.
As pointed out during the reetings, we believe that present licensing requirenents as described in the Standard Review Plan (SP.P) are adequate for extended burnup considerations, and what is needed, therefore, is a review of present nethods and safety analyses to assure their validity over the extended burnup range proposed. After reflecting upon the information presented and discussed in our neeting, we have concluded that a considerable anount of information exists and that extended burnup operation is justifiable. The informatien that would lead to this conclusion has not been documented, however, and is in a r:ixed form that does not lend itself to a systematic and orderly review. Accordingly, you tray want to prepare and submit for our review a topicel report that covers your extended burnup experience, methods, and test data, and which will provide the basis fcr a generic approval of operation of your fuel to a tercet burnup.
You should choose a target burnup to cover fuel that you intend to operate to that terget in the near future (up to 5 years) and which is justifiable by the information offered in your topical report. Assuming that you submit your report before the end of 1981, we would endeavor to complete our review by mid-1982. The approved report would then serve es e document that could be referenced by your custoners in lieu of separate, plant-specific analyses that would have to be submitted and reviewed each tire a licensee propnsed to operate fuel beyond a previously approved burnup value.
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~ hus Fe are enclosing a suggested outline fer the requested topical report. Based on our earlier reeting, we believe that you have much of this infernation available now. We appreciate your cooperation in expediting this matter. If you have any questions, please contact Dr. Michael Toker on (301) 492-9447.
Sincerely, Original signed M
.1, s. RuMastein L. S. Rubenstein, Assistant Direc'cor for Core and Containment Systws Ecucsutr ;
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- . 1931 SUGGESTED TOPICAL REPORT OUT_ME
" EXTENDED BURNUP OPERATION OF LWR FLEL RODS" ABSTRACT SUM!'.ARY 1.
INTRODUCTION (This section should be a brief introduction te tre report, including pertinent background information and report objectives.)
2.
ISSUES CONCERNING EXTEt:DED BUR!!UP OPERATION 2.1 Normal Steady-State Operation.
2.2 Power Ramping Operation.
2.3 Transient and Accident Operation.
(This section should include a review of Ipecific fuel rod behavior phenomena affected by burnup or residence time.
Examples of specific technical areas which should be consideret are:
cladding creepdown, cladding axial growth, FCI, corrosion, fission gas release, operation of defective fuel, and neutronics.
Items should include, but should not necessarily be limited to, those shoc in Table II of an NRC nemorandum, M. Tokar to W. V. Johnston, Extended Burnup Fuel -- Generic Kickoff l'.eeting,
February 18, 1981.
Assurance should be provided either that all the acceptance criteria ir SRP Section II. A.1, 2 & 3 are not affected or that apprcpriate nodifications have been nade and
.iustified for extended burnup. )
3.
REVIEW OF CURRENT DATA BASE 3.1 Norral Steady-State Operation.
3.2 Power Ramping Operation.
3.3 Transient and Accident Operation.
(This section should sumarize the availeMe data and define its extent for each of the iters identified ir Section 2.
Only the high exposure interaction with those phenomena (not the ite's per se) r.eed to be addressed.
Data regarding adva ;ed high burnup fuel designs including PCI-renedy designs, sho;1d also be presented if such desiens are to have inminent use.1
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. 4 CODE DUALIFICATION (This section should include model-to-data comparisons to s'. ne that burnup-dependent and residence-tine-dependent phenonena are er; licitly rodeled in vendor fuel perfor r,ance codes and that the nodels are qualified to the desired burnup.
Submodel qualification rather than whCe-code cualfications is sufficient.)
5.
CURRENT AND PLANLED UPERIMENTAL PROGRAMS 5.1 hornal Steady-State Operation.
5.2 Power Ramping Cperation.
5.3 Transier.t and Accident Operation.
(Scope and schedule of planned programs that provide data in the above areas shculd be discussed.
Specific non-destructi'.e and destructive measurements should be identified.
Erphasis should be placed on hew the experirertal programs will supnly cata to resolve issues identified in Section 2 and support code cualifi-catioa to exter.ded burnups.)
6.
CONCLUSIONS (By operating experience, prototype testing, and analytical predictions, the information provided in the report should demonstrate that every applicable part of tre safety analysis is valid out to the target burnup or that burnup and esposure do not influence the iters significantly.)
7.
REFERENCES 6.
APPENDICES AS REQUIRED
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m JUN 2 si fir. J. H. Trylor Panacer, Licensino Erbcock 8 Uilcox Co~pany Pewer Generation Group P. O. Box 12f0 Lynchburc, Vircinia 24505
Dear l'r. Taylor:
Duriro recent renths we hsve had a series of neetings cercerning the potential for extended (hicher than the traditional 28,000 to 33,050 IW./t) burnup of LPR fuel. 1:e have used these reetines to discuss the tasis for operetion cf fuel to extended burnups, including available operating data, analytical rodcls, anc test progran:
enterning burnup-related fuel perforrance pheno ena.
As pointed out during the r:eetings, we believe that prescnt licensing requirer.ents as described in the Standard Lcview Plan (5?.P) are adequt.te for extended turnup considerations, and n. hat is needed, therefore, is a review of present rethocs anc safety analyses to assure their validity over the extctded Furnup range proposed. After reflecting upon the infernation presented and discussed in our r.ccting, 5.e have concluded that a considerable amunt of infor:etion exists and that extended burnup operrtion is justifiable. The informaticn that seculd lead to this corclusion has not been docurented, hovever, and is in a rixed forr thet does not lend itself to a systenatic end orderly review. *ccordincly, you ray
$ ant to prepare and submit for our review a tonical report that covers ycur extended burnup experience, rethods, and test data, and ubich will previde the basis fcr a generic apprevel of Dr.eration of your fuel to a tercet turnup.
You should choose a tercet turnun to cover fuel that yeu intend to operate to that tarpet in the near future (up to 5 years) ord which is justificFle by the infor ation offered in your topical report. i.ssu-ing that ycu subnit your report befcre the end of 1081, we would endeavor to ccrplete our review by e.id-1932. The a:preved report uculd then serve es e deru ent that could be referar.ced by yrur custoters in lieu of cesarate, plart-strcific coalyres that veuld have to be subritted and reviewed each tie a licensee prepnsed to eperate fuel 1eyend a rrevieuily approved burnap value.
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-J Fe are enclosing e suegested outline fer the requested topical report. Lased on our earlier reeting, w believe tFet you base noch of this irferr.ation tvailable now. We appreciate your cocrcration in extediting this cetter.
If you have any questions, pitase contact Dr. l'ichael Tcl er en (391) 492-9447.
Sincerely.
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1 L, s. EuMcSt01D L. S. Ruberstein, Assistant Director for Core and Ccntainrent Systers
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SUGGESTED iDPICAL REPCRT DU'.:'.E
ABSTRACT SU!'" ARY 1.
It;TkOSUCT10t!
(This section should be a brief introduction tc tr e re;;rt, including pertirent backcrcund informetion and report obf+:tives.)
2.
ISSUES C0t:CERl:It:5 EXTEt:DED BURf!UP OPERATION 2.1 tormal Steady-State Operetion.
2.2 Fower Ranping Operation.
2.3 Transient and Accident Operation.
(This section should include a review of specific fuel rod behavior phenomena affected by burnup or residence tite.
E >arples of specific technical areas which should be considered are:
cladding crcendown, claddinc axial growth, PCI, ccrrosion, fission gas release, e;eration of defective fuel, and neutronics.
Items should include, but should r.o+ r.ecessarily be limited to, those show-in Table II of an f;RC
.nenarandam, it. Tciar to W. V. Johnston, 'Etter.det Earnup fuel -- Generic Ki:1.off I'.eeting," Februa ry 18, 1981.
Assurar:e sneuld be provided either thet all the acceptance criteria ir "RP Se: tion II. A.1, 2 & 3 are not affected or that apprcpriate radifications hase bcen r.ade and
.iustified for extended burnup. )
3.
REVIEW 0F CURREt;l DATA EASE 3.1 Norral Steady-State Operation.
3.2 Po.er Ra ping Operation.
3.3 Trer,sient and Accident Dperation.
(This section should summarire the availa!1e data :nd define its Extent for each of the iters identified ir Sectic-2.
Dnly it e hich e>pesure ir,teraction with those ptencrcna ;rci the it(rs per se) need to be eddressed.
Data regarding adered bi;n tmrnup ft:el designs includinc PCI-renedy designs, sheJ r alsc re ;'rescr.ted if such designs are to have ir-ir,ent use.'
4 LDDE imAtIFICAT10tJ (This section should include rodel-t:-f ata compariscns to sh:
that burnup-dtpendent and residence-tine-da:endent r.hencrena are ci-licitly rodeled in vendor fuel perforr.ance ccres and that tte redels 2-c cualified to the desired burnup.
Subnodel yaclification rather than wh;"e-code cualfications is suf ficient.)
E.
CURREt;T AND PL AN!.ED DPERIt' INTAL PR05:.A".5 5.1 f.orr.al Stea dy-Itate Operation.
5.2 power Rar: ping E;eration.
5.3 Transient and *ccident Operatics.
(Secpe and schedule of planned :rograms that provide data in the above areas sFould be discussed. Specific ncr.-destructi.e and destructive rEasurenents should te identified.
Erphasis should be placed on hrw the experirental programs will supply cita to resc1ve issues identified in Se: tion 2 and scT? ort code cualifi-cation to exte ded burnups.)
f.
CONCLUSIONS (Fy operating experience, prototype testing, and analytical predictions, the infor ation provided in the recor: should der.onstrate that tvery applicable part of t*e safety ar.alysis is valid out to the tar;et turnup cr that turnup and e>posure do not influence the iters signifi:antly.)
7.
EEFERENCES E.
AFFENDICES AS REQUIEED
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