ML12088A491
| ML12088A491 | |
| Person / Time | |
|---|---|
| Site: | Indian Point, PROJ0690  |
| Issue date: | 09/19/1997 |
| From: | Charemagne Grimes Office of Nuclear Reactor Regulation |
| To: | Walters D Atomic Safety and Licensing Board Panel, Nuclear Energy Institute |
| SECY RAS | |
| References | |
| RAS 22105, ASLBP 07-858-03-LR-BD01, 50-247-LR, 50-286-LR NUDOCS 9709240243 | |
| Download: ML12088A491 (7) | |
Text
), ENT000097
.4,.. Doug'las J, Wa1ters September 19, 1997 Submitted: March 28, 2012 Nuclear (nergy Institute 1776 I Stre'~t. NW Stfite 300
, Washington, DC 20585
SUBJECT:
DETERMINATION OF AGING MANAGEMENT REVIEW FOR ELECTRICAL COMPONENTS
Dear Mr,
Wfl'l ters ;
During the Nuclear Regulatory Corrmission staff's review of the Nuclear Energy Institute's NEI 95-10. "Industry Guideline for Implementing the R~q~irement:i' of 10 CFR Part 54 .. The L1cense Renewal Rule." the need was 1dentlfled for guidance on whether selected electrical components are subject to an aging management review. Nfl addressed a number of the components in ikS letter dated December 24. 1996. ConSistent with the staff's approach in its Febr*uary 27. 1997. letter to provide positions on significant iS$u's assoclated with the license r'enewal regulatory guide and Nfl 95~10, enclosed plea.se find the staff's posHion on the ag'jng management review r'eqU'iremel1ts for se 1acted 81 ectr i cc:l1 components. The recommenda t ions in the ene 1osed position shoUld be considered when revising NEl 95-10, Sincerely, Original signed by:
Christopher I. Grimes, Director License Renewa 1 PY'Oject Di rectorate Division of Reactor Program Management Office of Nuclear Reactor Regulation Project 690
Enclosure:
As stated cc; w/enel: See next page i : r tQ.Ul1 on:
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R, Zimmerman, 0-12G18 J. MoorefE. Holler. 015818 ,) .<),
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M, Slosson G. MiZuno. 0-15818 S. Weiss S Meador. 0-17G21 R. Correria. O-IOA17 R. Wessman, 0-7£23 G, Holahan. 0-8E2 B. Sheron, 0-7026 M, Mayfield, T-10£10 A. Murphy. T-IOll
",)::c,t 'I J. Strosnider, 0 .. 704 H. Brammer. 0-7H15 "(),r/ It L. ShaD. 0-10020 G. Bagchi. 0-7H15 J. Calvo, 0-7£4 R.l. Gi n, Duke Power D, Thatcher. 0-7E4 B,W. Doroshuk, BGE PDLR Staff . '1' ~\~
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'NUCLiARRIGULATORY COMM'.'ON WASHiINGTCiI\I, I).C'. ~1 Septemb~r 19, 1997 fir, Douglas 1.1. Walters Nuclear Energy Institute 1716 I Street, NW Suite 300 WCJshl ogton , DC 20585
SUBJECT:
DETERMINATION OF AGING MANAGEMENT REVIEW FOR ELECTRICAL COf4PONENtS DE~ar Mr, Wa 1ters:
OtJring the Nucle<lf Regulatory Coumission staff's review of the NI;clear Energy InstItute's NEl 95~10, "Industry Guideline for Implementing the Requirements of 10 CPR Part 54 ~ The License Renewal Rule," the need was identi fied for ,
guidanc~ 0(1 ~lhether selected electrical components are subject to an agHI9 management r(~view. NEI addressed a number of the components in its letter dated December 24, 1996. Consistent wHr,1 the staff's approach in its February 27, 1997, 1etter to provide positions on Significant issues associated with the "license renelrJal regulatory gtrjde and NEI 95-10, enclosed please find the staff's POSitlO!1 on the aging management review requirements for selected electrical components. The recommendations 1n the enclosed position shOtfld be CQns'idere<1 when revising NEl 95-10.
Sincerely, c:-~~
Christopher I .. Grimes. Director Li censa Renewal PrOje.ct Oi rectorate Division of Reactor Program Management Office of Nuclear Reactor Regulation PrOject 690
Enclosure:
stated cc: \til/end: See next page
NUCLEAR ENERGY INSTITUTE (Nfl)
PrOject No .690 cc: Mr, ()E~l1nis Harrison U.5. O~partment of Energy NE .. 42 Washington. DC 20585 Mr. Douglas J. Walters Nuclear*tnergy Institute 1776 I Street. NW Suite 300 Washi ngton. DC :W006 Mr. Richard P. Sedano. Commissioner State Liaison Officer State of Vermont Department of Public Service tt2 State Street Ol"dWel" 20 Montpelier. Vermont 05620~2601
O'termhtfng if trlnsforl'llers, fuses, indlcitfng lighh, heat tracing, electric heaters. and recombinel"s are subject to an aging manigsment review.
Thh i Hue rehhs to the 9yi!Jam;e provided 11"1 the Statements of ConslJerit 1*on (SOC) in which the C~ntssio" concluded that an aging management review is rElquired for ()iluill'e. long.,.11vtd structures alnd components within the scope of the license d.lnewil rule. Appendix B of HE! 95**10 addresses this requirement by 1de~t1fY1n9 typical structure t component~ and commodity grouplngs and a deterHnnation u to whether they require an aging man.-gement review. Several electrical components, as identified above, were not classified in Appendix B.
The rule in §S4.21(a)O)' states that "structur'es and components subject to an aging management review shan encompass those structures and components (1)
[tJhat perform an intended function u described in §!H.4, without moving parts or without a change in configuration or properties," The SOC uses the term I1JHlissive" to repr~sent these characteristics for convenience. The description of IIplIlssive" structures ind components incorporated into U4.21(a)(1)(i} is used only 11'1 conjunction with the IPA review 1n the license renewal process. The SOC accompanying the renewal rule states: liThe COlMlhslon has deterl'i'llned that passiVe structures and ~ompoflents for which aging degradat ion is not readily monitored arE! those that perform an intended fUIIH:tion 'ifithQut moving parh or a change in ccmfigufilltion or properties." (60 FR 22471). '1'h~ SOC also states: "[T]he cOlMlhsion has concluded that "a change in configuration or properties* should be interpreted to include "a change in state," which is a term sometimes found in the literature relating to "pasl;iive."
§54.21(aHO(O excludes i variety of alectrical and instrumentation and control (I'C) structures and components frDm an aging management review for renewal slJch u motors, diesel generators. air rompressors, pressure transmitters. pressure indicators, water level indicators, switchgear, cDoling fans, transistors. batterif.!s, bt'@akers, relays, switches, power inverters, ch~cu1t boards. battery cnirgers, and power supplies. The SOC provides the following discussion as the basts for excluding several Rlectr1cal and I&e devices from an aging management review: "an electrical relay can change .its configuration, and a battery changes its electrolyte properties when dh'hir~,.ingJt and !ia transistor can 'chinge its shte'. tI The SOC also provid@s the following discussion as the bash to include electrlcal cables in an aging management review; "they perform thetr intended function without moving parts 01" without a change in configur'ilitiol'l 01" properties and the effects of aging degradation for these CDmI'lOn~H'h are not readily monHorab1e." (60 FR 22477)
While §54.21(i)(1)(i) excludes many el~ctr1cal and I&C components from an
~ging Mafligement review for renewal, it <ilhQ states that the exclusion is "not limited to~ only these components. ihe staff has considered the aging Attachment
""'IttMn't revl. req... i re.nt$ for tran$former$ ~ futiJIu. i ndh:it 1.ng 1ighll,
,"**ttrac1fi9, Illctrh: heaters} ami re~WTtbiner$ with respect to the' .
d,f1niti'©fui bi(kgrouftG, i~d specific eletlrlcil ex~le$ in the 11een.s'e.
V'-snewalrule (c:trcu1tbr,akflfs, rehy$~ motors~ circuit bf,Jards, etc.). p~~"ad on the con$1d.,'~bl. dh~uuion provided in the rule And sOt, t~e staff eomptredtbe .htctr1ed CompOf'!4iU'tU identified above w1th the e,umples e!xplh::1t1ypr~n'fded in thl rl411 1n termscf how the performafice of their i:ntt:nded funttio,uz .uld be aeMttved 4ilfld whether aging d'4llgr.dation of the.$,~
cOIJN)~ntnts would he readily monitored using currently ivai hble tedln1ques, 1n I ii.nolr WiY by wMt;~~ the g"amphs in the rule (circuit breakers, reb:.)'s}
~~itthe~. ttt.) tlfoul d ht monitored. These techn i ques inc 1ude performal'lC8Qr conditio," monu'ilr1ng by testing ind malntenance/survel1hnce progr.amsth'a,t
. inc:lude 1nstrw'Mmt checb t functional tests,ca'librat ion functional te.sts.:. a.nd response time veri fh::at ion tests. Theresu1ts of theM! tests and performance mon-itcTing programs Cin be analyzed and trended to provide an h,d1eaticm of aging dt9r~dation forthe$o electrical components as discussed below: .
lransformers perform their intended funrtion through a changE!
in state by 5t~pplng down voltage from higher to C\ lower value, stepping up voltage to a higher vallie, or providing hohtion to a load. lral'u;formers perform their intended fUnction through
~ chaillge tn state similir to switchgear, power supplies, battery ch<~rger$,
and power inVII,H*ters.wMch have been excluded in §54.21(a)(1)(i) from n .aging management review. Any degradation of the transformer's ibO HY to perform ib int'nded fllnction 15 rudl1y mordtorable by a change 11'1 the electrical pliH"formince of the tv'ansformer and the i$~octited ci rcuth. Tr~mHng e1ectrh::al parameters measured durhl9 transformer surveillance iwd l'il~intenance such is DDbh test results t and advanced' monitoring meth.ods such as infrared thermography, and electrical circuit characterilation and diagnosis provide a direct indication of the perfonnnce of the transformer. ThtrefQfe 9 transformers ire not subject to an aging management tev1ew.
Indh::ilitilJ19 lights (dual filament) perform their intended function thrpugh a change in state by disphJifig readily monitorabh visible light when*
energ-lz,ed with sufficient voltage. Indicating 1ights perform their intended fl.lnct1on through a dUlI1ge in state similar to transistors and circuit bOilrds, which hive been excluded in §54.21(a}(lHi) from
"" q'ging marnagem~nt review. Any degradation of the indicating Hqhb abfl ity to perform its 1i'titended fl.lflct lon is readily monitorable since the lights (e.g., control If'oom and local panel annunciators) typically havljboth i v'hual and audio test capabi Hty that is ina iated on ill per1odi<: bash. by the operator. Thh self-test capability is relied upon to proviae a direct indication of the perfONlliimCe of the indicating lights. Therefore, indicating lights are not subject to an aging fflcU1-i1lg_mtnt review.
Heallt tracing perform.s its intended function through a change in state by supplying he.!1!t when e.!fu!V'gl!ed. for exam!) 1e. to a boric add $ystem o*r a
refueling witer storag' ti\nk/plplng in order to maintain ~ l'IlilnimuilI
$01ut10n temperature tQ prevent boron from precipitating out or water from freeling in an outs1d~ pipe, Heat. tfi,~~fj9 performs its intended flmet10n through I chlnge in state when energized similar to it power supply, blttery cnargel"gpower 1nvert~r, etc., whlch have been excluded in fS4.21(IHIHt} from in Iging mjUulge~nt review. Any degr_datlon of the heat trleing to p&rfOnll its intended function h readny M(mitored by all", Circuitry (control ro~ and local panel annunciators) or by surveillanco r.quire,"nh that monitor solution temperature on a periodic bash which provides a direct ind1eat1on of the performance of the heat tracing. Thtreforl, heat tracing is not subject to an aging management review.
Electric heaters perform their Intended fundion t.hrough a change in state by supplying heat when energiled, for example, to a pressurizer water voluMe for reactor coohnt system pressure control. Electric heat~r$ .,erform their intended function through a chinge in state slmn~u' to a battery charger, power inverter, power supply, etc. t that
.,rumge state when energized and whlch hiVe been excluded in
§S4.21{a)(lHf) from an aging management review. Any degradation of the electric heaters! ability to perform their 1nhnded function due to aging wi 11 be rsadily mcmitorable from exist 1ng monHori ng equipment (VoitMten and act lYe perfonnance of the eqUipment in the ci rcuit) and surveil hncl! r~qiji rements by verifying that the heaters ~re il\!!I'UlH"gi:(:cd and by me,uuring circuit current on i periodic bash. Therefore, electrlc heaters ire not subject to i.n 19l1'19 management review for the lntertded fund ion of supplying heat. The pressure boundary intended funet'it,lrt would ~iU n be subject to an aging management review.
The staff has iiso (;\)fisidered the iging management review requirements for fuse5 and hydrflgen recombiners as dhcyssed below:
fuses perform one of their two ifltended functions through a change in configuration or shte of the fuse by interrijptll'lg pcwr:r in the case of a fault or overload in a load in order to provide protection to the t'est of the electrical circuit. fuses aho perform it second inten(ied function which is to ma1nta1n electrical contlnuity during rum-fauHed conditions. Unlike other ~leetrltil components which hav~ siml lar continuity funct,ions slJch u breakers, switches, and relays i\lhich have betn I!xclud!)d 11'1 § 54.21 (a)(1)(1) from an aging fIli.f\agement review, degridilktion of the fuse's ability to perform this intended function due to aging is not re~dny monitorab1e. Degradation of the fuse*s intended continuity function may not result in detectable losses in associated system safety functions until degradation becomes unacceptable.
Therefore, the staff believes that fuses are subject to an aging management ,"eview.
Recombiners remove gueous hydrogen from the contahiment atmosphere by combining hydrogen with oxygen to form watgr. This intended function is accomplished with several tomponent types such as electric heater
h;an.k$, c.~Hht. (;Qrmectlons,etc. As such, retombiners should be cOn$id.r8~ ~$ (*11)( iiiuembl1es ind should be eVilu~ted on aphnt .
specific buh to deter~lne if they ~re subject to an 191"9 managenent rev1f)wf()t" rtnewal.
Qa$$.4 !Q(t ttl* *bove UlUtUiHnt, the stiff cOrlel uded that these comppnents,Wlth t.he eX(lpt*io!'t of fU$!SI$ and reeombhttll'$. pell'fonn their hte,,<ied fun(tion.<~r ...
with a diing~ in cOnfiguration/stde and the effects clf aging are n!ladily
.ntt~r"iiAnd thertfov'e, are not subject to an Igha9 Iuulagemfmt review.
Elec;tr'icill lind UU: structure$ and components that are subject to an ag1ng mln~g<<!l.nt review for l"'tMw41 include~ but may not be limited to: e1ectriC\il e"t,)lf$ and t;(mnlct1ons, fllSGlS, elfilCtrh:"l ilnd lie penetration assembl ias.
>,¢_ble U".Yi, I;lI\d elettrh:al and Ille cabinets, paneh, racks, frames,
!!nelQsures, and other simihr comJ,Hlnent supports.
I~ . ~t.iff "rico_ntilt 1QD$ :
The NRC shff recommends r"evh1ng Appen4ix B of NEI 95-10 to indicate that transformers, indicating Hghts, he$t tri\cin9, and electric heaters do not require an aging I1ilinlgement revfew (reeombiners Sh(H.lid remain plant specific) and to $t~t.t that eltc:trh:al and at structures and components subject to ~n a1J in g Qt~nagemeflt revie~ for renewal shQuld inchlde: electrical cables and connections! fuses, electrical and XlC penetration assembl ies, cable trays, ind eiectdcal and Ille cabinets, PiMh, Y'ac:ks, frames, enclosures, and otber similar component supports.